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[experiment] add alternative wasm sqlite3 implementation available via build-tag (#2863)

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This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
This commit is contained in:
kim 2024-05-27 15:46:15 +00:00 committed by GitHub
parent cce21c11cb
commit 1e7b32490d
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
398 changed files with 86174 additions and 684 deletions
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5
go.mod
View File

@ -44,6 +44,7 @@ require (
github.com/miekg/dns v1.1.59
github.com/minio/minio-go/v7 v7.0.70
github.com/mitchellh/mapstructure v1.5.0
github.com/ncruces/go-sqlite3 v0.16.0
github.com/oklog/ulid v1.3.1
github.com/prometheus/client_golang v1.19.1
github.com/spf13/cobra v1.8.0
@ -78,7 +79,7 @@ require (
golang.org/x/text v0.15.0
gopkg.in/mcuadros/go-syslog.v2 v2.3.0
gopkg.in/yaml.v3 v3.0.1
modernc.org/sqlite v1.29.8
modernc.org/sqlite v0.0.0-00010101000000-000000000000
mvdan.cc/xurls/v2 v2.5.0
)
@ -173,6 +174,7 @@ require (
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.2 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/ncruces/julianday v1.0.0 // indirect
github.com/opencontainers/runtime-spec v1.0.2 // indirect
github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
github.com/pelletier/go-toml/v2 v2.2.2 // indirect
@ -197,6 +199,7 @@ require (
github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe // indirect
github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB // indirect
github.com/tdewolff/parse/v2 v2.7.14 // indirect
github.com/tetratelabs/wazero v1.7.2 // indirect
github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
github.com/toqueteos/webbrowser v1.2.0 // indirect
github.com/twitchyliquid64/golang-asm v0.15.1 // indirect

6
go.sum
View File

@ -445,8 +445,12 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
github.com/moul/http2curl v1.0.0 h1:dRMWoAtb+ePxMlLkrCbAqh4TlPHXvoGUSQ323/9Zahs=
github.com/moul/http2curl v1.0.0/go.mod h1:8UbvGypXm98wA/IqH45anm5Y2Z6ep6O31QGOAZ3H0fQ=
github.com/ncruces/go-sqlite3 v0.16.0 h1:O7eULuEjvSBnS1QCN+dDL/ixLQZoUGWr466A02Gx1xc=
github.com/ncruces/go-sqlite3 v0.16.0/go.mod h1:2TmAeD93ImsKXJRsUIKohfMvt17dZSbS6pzJ3k6YYFg=
github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
github.com/oklog/ulid v1.3.1 h1:EGfNDEx6MqHz8B3uNV6QAib1UR2Lm97sHi3ocA6ESJ4=
github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
@ -558,6 +562,8 @@ github.com/tdewolff/test v1.0.11-0.20240106005702-7de5f7df4739 h1:IkjBCtQOOjIn03
github.com/tdewolff/test v1.0.11-0.20240106005702-7de5f7df4739/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
github.com/technologize/otel-go-contrib v1.1.1 h1:wZH9aSPNWZWIkEh3vfaKfMb15AJ80jJ1aVj/4GZdqIw=
github.com/technologize/otel-go-contrib v1.1.1/go.mod h1:dCN/wj2WyUO8aFZFdIN+6tfJHImjTML/8r2YVYAy3So=
github.com/tetratelabs/wazero v1.7.2 h1:1+z5nXJNwMLPAWaTePFi49SSTL0IMx/i3Fg8Yc25GDc=
github.com/tetratelabs/wazero v1.7.2/go.mod h1:ytl6Zuh20R/eROuyDaGPkp82O9C/DJfXAwJfQ3X6/7Y=
github.com/tidwall/btree v0.0.0-20191029221954-400434d76274 h1:G6Z6HvJuPjG6XfNGi/feOATzeJrfgTNJY+rGrHbA04E=
github.com/tidwall/btree v0.0.0-20191029221954-400434d76274/go.mod h1:huei1BkDWJ3/sLXmO+bsCNELL+Bp2Kks9OLyQFkzvA8=
github.com/tidwall/buntdb v1.1.2 h1:noCrqQXL9EKMtcdwJcmuVKSEjqu1ua99RHHgbLTEHRo=

28
internal/api/client/media/mediacreate_test.go
View File

@ -38,7 +38,6 @@
"github.com/superseriousbusiness/gotosocial/internal/federation"
"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/media"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
"github.com/superseriousbusiness/gotosocial/internal/processing"
@ -77,19 +76,22 @@ type MediaCreateTestSuite struct {
TEST INFRASTRUCTURE
*/
func (suite *MediaCreateTestSuite) SetupSuite() {
suite.state.Caches.Init()
func (suite *MediaCreateTestSuite) SetupTest() {
testrig.StartNoopWorkers(&suite.state)
// setup standard items
testrig.InitTestConfig()
testrig.InitTestLog()
suite.db = testrig.NewTestDB(&suite.state)
suite.state.DB = suite.db
suite.state.Caches.Init()
suite.storage = testrig.NewInMemoryStorage()
suite.state.Storage = suite.storage
suite.db = testrig.NewTestDB(&suite.state)
testrig.StandardDBSetup(suite.db, nil)
testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
suite.tc = typeutils.NewConverter(&suite.state)
testrig.StartTimelines(
@ -106,21 +108,8 @@ func (suite *MediaCreateTestSuite) SetupSuite() {
// setup module being tested
suite.mediaModule = mediamodule.New(suite.processor)
}
func (suite *MediaCreateTestSuite) TearDownSuite() {
if err := suite.db.Close(); err != nil {
log.Panicf(nil, "error closing db connection: %s", err)
}
testrig.StopWorkers(&suite.state)
}
func (suite *MediaCreateTestSuite) SetupTest() {
suite.state.Caches.Init()
testrig.StandardDBSetup(suite.db, nil)
testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
// setup test data
suite.testTokens = testrig.NewTestTokens()
suite.testClients = testrig.NewTestClients()
suite.testApplications = testrig.NewTestApplications()
@ -132,6 +121,7 @@ func (suite *MediaCreateTestSuite) SetupTest() {
func (suite *MediaCreateTestSuite) TearDownTest() {
testrig.StandardDBTeardown(suite.db)
testrig.StandardStorageTeardown(suite.storage)
testrig.StopWorkers(&suite.state)
}
/*

27
internal/api/client/media/mediaupdate_test.go
View File

@ -36,7 +36,6 @@
"github.com/superseriousbusiness/gotosocial/internal/federation"
"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/media"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
"github.com/superseriousbusiness/gotosocial/internal/processing"
@ -75,18 +74,22 @@ type MediaUpdateTestSuite struct {
TEST INFRASTRUCTURE
*/
func (suite *MediaUpdateTestSuite) SetupSuite() {
func (suite *MediaUpdateTestSuite) SetupTest() {
testrig.StartNoopWorkers(&suite.state)
// setup standard items
testrig.InitTestConfig()
testrig.InitTestLog()
suite.db = testrig.NewTestDB(&suite.state)
suite.state.DB = suite.db
suite.state.Caches.Init()
suite.storage = testrig.NewInMemoryStorage()
suite.state.Storage = suite.storage
suite.db = testrig.NewTestDB(&suite.state)
testrig.StandardDBSetup(suite.db, nil)
testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
suite.tc = typeutils.NewConverter(&suite.state)
testrig.StartTimelines(
@ -103,21 +106,8 @@ func (suite *MediaUpdateTestSuite) SetupSuite() {
// setup module being tested
suite.mediaModule = mediamodule.New(suite.processor)
}
func (suite *MediaUpdateTestSuite) TearDownSuite() {
if err := suite.db.Close(); err != nil {
log.Panicf(nil, "error closing db connection: %s", err)
}
testrig.StopWorkers(&suite.state)
}
func (suite *MediaUpdateTestSuite) SetupTest() {
suite.state.Caches.Init()
testrig.StandardDBSetup(suite.db, nil)
testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
// setup test data
suite.testTokens = testrig.NewTestTokens()
suite.testClients = testrig.NewTestClients()
suite.testApplications = testrig.NewTestApplications()
@ -129,6 +119,7 @@ func (suite *MediaUpdateTestSuite) SetupTest() {
func (suite *MediaUpdateTestSuite) TearDownTest() {
testrig.StandardDBTeardown(suite.db)
testrig.StandardStorageTeardown(suite.storage)
testrig.StopWorkers(&suite.state)
}
/*

6
internal/api/fileserver/fileserver_test.go
View File

@ -70,8 +70,6 @@ func (suite *FileserverTestSuite) SetupSuite() {
testrig.InitTestConfig()
testrig.InitTestLog()
suite.db = testrig.NewTestDB(&suite.state)
suite.state.DB = suite.db
suite.storage = testrig.NewInMemoryStorage()
suite.state.Storage = suite.storage
@ -98,8 +96,12 @@ func (suite *FileserverTestSuite) SetupTest() {
suite.state.Caches.Init()
testrig.StartNoopWorkers(&suite.state)
suite.db = testrig.NewTestDB(&suite.state)
suite.state.DB = suite.db
testrig.StandardDBSetup(suite.db, nil)
testrig.StandardStorageSetup(suite.storage, "../../../testrig/media")
suite.testTokens = testrig.NewTestTokens()
suite.testClients = testrig.NewTestClients()
suite.testApplications = testrig.NewTestApplications()

6
internal/config/global.go
View File

@ -52,3 +52,9 @@ func LoadEarlyFlags(cmd *cobra.Command) error {
func BindFlags(cmd *cobra.Command) error {
return global.BindFlags(cmd)
}
// Reset will totally clear global
// ConfigState{}, loading defaults.
func Reset() {
global.Reset()
}

48
internal/config/state.go
View File

@ -37,25 +37,9 @@ type ConfigState struct {
// NewState returns a new initialized ConfigState instance.
func NewState() *ConfigState {
viper := viper.New()
// Flag 'some-flag-name' becomes env var 'GTS_SOME_FLAG_NAME'
viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
viper.SetEnvPrefix("gts")
// Load appropriate named vals from env
viper.AutomaticEnv()
// Create new ConfigState with defaults
state := &ConfigState{
viper: viper,
config: Defaults,
}
// Perform initial load into viper
state.reloadToViper()
return state
st := new(ConfigState)
st.Reset()
return st
}
// Config provides safe access to the ConfigState's contained Configuration,
@ -116,6 +100,32 @@ func (st *ConfigState) Reload() (err error) {
return
}
// Reset will totally clear
// ConfigState{}, loading defaults.
func (st *ConfigState) Reset() {
// Do within lock.
st.mutex.Lock()
defer st.mutex.Unlock()
// Create new viper.
viper := viper.New()
// Flag 'some-flag-name' becomes env var 'GTS_SOME_FLAG_NAME'
viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
viper.SetEnvPrefix("gts")
// Load appropriate
// named vals from env.
viper.AutomaticEnv()
// Reset variables.
st.viper = viper
st.config = Defaults
// Load into viper.
st.reloadToViper()
}
// reloadToViper will reload Configuration{} values into viper.
func (st *ConfigState) reloadToViper() {
raw, err := st.config.MarshalMap()

1
internal/db/bundb/admin_test.go
View File

@ -74,6 +74,7 @@ func (suite *AdminTestSuite) TestCreateInstanceAccount() {
// we need to take an empty db for this...
testrig.StandardDBTeardown(suite.db)
// ...with tables created but no data
suite.db = testrig.NewTestDB(&suite.state)
testrig.CreateTestTables(suite.db)
// make sure there's no instance account in the db yet

25
internal/db/bundb/bundb.go
View File

@ -48,8 +48,6 @@
"github.com/uptrace/bun/dialect/pgdialect"
"github.com/uptrace/bun/dialect/sqlitedialect"
"github.com/uptrace/bun/migrate"
"modernc.org/sqlite"
)
// DBService satisfies the DB interface
@ -133,12 +131,12 @@ func NewBunDBService(ctx context.Context, state *state.State) (db.DB, error) {
switch t {
case "postgres":
db, err = pgConn(ctx, state)
db, err = pgConn(ctx)
if err != nil {
return nil, err
}
case "sqlite":
db, err = sqliteConn(ctx, state)
db, err = sqliteConn(ctx)
if err != nil {
return nil, err
}
@ -295,7 +293,7 @@ func NewBunDBService(ctx context.Context, state *state.State) (db.DB, error) {
return ps, nil
}
func pgConn(ctx context.Context, state *state.State) (*bun.DB, error) {
func pgConn(ctx context.Context) (*bun.DB, error) {
opts, err := deriveBunDBPGOptions() //nolint:contextcheck
if err != nil {
return nil, fmt.Errorf("could not create bundb postgres options: %w", err)
@ -326,7 +324,7 @@ func pgConn(ctx context.Context, state *state.State) (*bun.DB, error) {
return db, nil
}
func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
func sqliteConn(ctx context.Context) (*bun.DB, error) {
// validate db address has actually been set
address := config.GetDbAddress()
if address == "" {
@ -339,9 +337,6 @@ func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
// Open new DB instance
sqldb, err := sql.Open("sqlite-gts", address)
if err != nil {
if errWithCode, ok := err.(*sqlite.Error); ok {
err = errors.New(sqlite.ErrorCodeString[errWithCode.Code()])
}
return nil, fmt.Errorf("could not open sqlite db with address %s: %w", address, err)
}
@ -356,11 +351,9 @@ func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
// ping to check the db is there and listening
if err := db.PingContext(ctx); err != nil {
if errWithCode, ok := err.(*sqlite.Error); ok {
err = errors.New(sqlite.ErrorCodeString[errWithCode.Code()])
}
return nil, fmt.Errorf("sqlite ping: %w", err)
}
log.Infof(ctx, "connected to SQLITE database with address %s", address)
return db, nil
@ -528,12 +521,8 @@ func buildSQLiteAddress(addr string) string {
// Use random name for in-memory instead of ':memory:', so
// multiple in-mem databases can be created without conflict.
addr = uuid.NewString()
// in-mem-specific preferences
// (shared cache so that tests don't fail)
prefs.Add("mode", "memory")
prefs.Add("cache", "shared")
addr = "/" + uuid.NewString()
prefs.Add("vfs", "memdb")
}
if dur := config.GetDbSqliteBusyTimeout(); dur > 0 {

346
internal/db/bundb/drivers.go
View File

@ -18,350 +18,14 @@
package bundb
import (
"context"
"database/sql"
"database/sql/driver"
"time"
_ "unsafe" // linkname shenanigans
pgx "github.com/jackc/pgx/v5/stdlib"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"modernc.org/sqlite"
"github.com/superseriousbusiness/gotosocial/internal/db/postgres"
"github.com/superseriousbusiness/gotosocial/internal/db/sqlite"
)
var (
// global SQL driver instances.
postgresDriver = pgx.GetDefaultDriver()
sqliteDriver = getSQLiteDriver()
// check the postgres connection
// conforms to our conn{} interface.
// (note SQLite doesn't export their
// conn type, and gets checked in
// tests very regularly anywho).
_ conn = (*pgx.Conn)(nil)
)
//go:linkname getSQLiteDriver modernc.org/sqlite.newDriver
func getSQLiteDriver() *sqlite.Driver
func init() {
sql.Register("pgx-gts", &PostgreSQLDriver{})
sql.Register("sqlite-gts", &SQLiteDriver{})
}
// PostgreSQLDriver is our own wrapper around the
// pgx/stdlib.Driver{} type in order to wrap further
// SQL driver types with our own err processing.
type PostgreSQLDriver struct{}
func (d *PostgreSQLDriver) Open(name string) (driver.Conn, error) {
c, err := postgresDriver.Open(name)
if err != nil {
return nil, err
}
return &PostgreSQLConn{conn: c.(conn)}, nil
}
type PostgreSQLConn struct{ conn }
func (c *PostgreSQLConn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *PostgreSQLConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
tx, err := c.conn.BeginTx(ctx, opts)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &PostgreSQLTx{tx}, nil
}
func (c *PostgreSQLConn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *PostgreSQLConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
st, err := c.conn.PrepareContext(ctx, query)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &PostgreSQLStmt{stmt: st.(stmt)}, nil
}
func (c *PostgreSQLConn) Exec(query string, args []driver.Value) (driver.Result, error) {
return c.ExecContext(context.Background(), query, toNamedValues(args))
}
func (c *PostgreSQLConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
result, err := c.conn.ExecContext(ctx, query, args)
err = processPostgresError(err)
return result, err
}
func (c *PostgreSQLConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return c.QueryContext(context.Background(), query, toNamedValues(args))
}
func (c *PostgreSQLConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
rows, err := c.conn.QueryContext(ctx, query, args)
err = processPostgresError(err)
return rows, err
}
func (c *PostgreSQLConn) Close() error {
return c.conn.Close()
}
type PostgreSQLTx struct{ driver.Tx }
func (tx *PostgreSQLTx) Commit() error {
err := tx.Tx.Commit()
return processPostgresError(err)
}
func (tx *PostgreSQLTx) Rollback() error {
err := tx.Tx.Rollback()
return processPostgresError(err)
}
type PostgreSQLStmt struct{ stmt }
func (stmt *PostgreSQLStmt) Exec(args []driver.Value) (driver.Result, error) {
return stmt.ExecContext(context.Background(), toNamedValues(args))
}
func (stmt *PostgreSQLStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
res, err := stmt.stmt.ExecContext(ctx, args)
err = processPostgresError(err)
return res, err
}
func (stmt *PostgreSQLStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.QueryContext(context.Background(), toNamedValues(args))
}
func (stmt *PostgreSQLStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
rows, err := stmt.stmt.QueryContext(ctx, args)
err = processPostgresError(err)
return rows, err
}
// SQLiteDriver is our own wrapper around the
// sqlite.Driver{} type in order to wrap further
// SQL driver types with our own functionality,
// e.g. hooks, retries and err processing.
type SQLiteDriver struct{}
func (d *SQLiteDriver) Open(name string) (driver.Conn, error) {
c, err := sqliteDriver.Open(name)
if err != nil {
return nil, err
}
return &SQLiteConn{conn: c.(conn)}, nil
}
type SQLiteConn struct{ conn }
func (c *SQLiteConn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *SQLiteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
err = retryOnBusy(ctx, func() error {
tx, err = c.conn.BeginTx(ctx, opts)
err = processSQLiteError(err)
return err
})
if err != nil {
return nil, err
}
return &SQLiteTx{Context: ctx, Tx: tx}, nil
}
func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *SQLiteConn) PrepareContext(ctx context.Context, query string) (st driver.Stmt, err error) {
err = retryOnBusy(ctx, func() error {
st, err = c.conn.PrepareContext(ctx, query)
err = processSQLiteError(err)
return err
})
if err != nil {
return nil, err
}
return &SQLiteStmt{st.(stmt)}, nil
}
func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
return c.ExecContext(context.Background(), query, toNamedValues(args))
}
func (c *SQLiteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (result driver.Result, err error) {
err = retryOnBusy(ctx, func() error {
result, err = c.conn.ExecContext(ctx, query, args)
err = processSQLiteError(err)
return err
})
return
}
func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return c.QueryContext(context.Background(), query, toNamedValues(args))
}
func (c *SQLiteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (rows driver.Rows, err error) {
err = retryOnBusy(ctx, func() error {
rows, err = c.conn.QueryContext(ctx, query, args)
err = processSQLiteError(err)
return err
})
return
}
func (c *SQLiteConn) Close() error {
// see: https://www.sqlite.org/pragma.html#pragma_optimize
const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
_, _ = c.conn.ExecContext(context.Background(), onClose, nil)
return c.conn.Close()
}
type SQLiteTx struct {
context.Context
driver.Tx
}
func (tx *SQLiteTx) Commit() (err error) {
err = retryOnBusy(tx.Context, func() error {
err = tx.Tx.Commit()
err = processSQLiteError(err)
return err
})
return
}
func (tx *SQLiteTx) Rollback() (err error) {
err = retryOnBusy(tx.Context, func() error {
err = tx.Tx.Rollback()
err = processSQLiteError(err)
return err
})
return
}
type SQLiteStmt struct{ stmt }
func (stmt *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
return stmt.ExecContext(context.Background(), toNamedValues(args))
}
func (stmt *SQLiteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
err = retryOnBusy(ctx, func() error {
res, err = stmt.stmt.ExecContext(ctx, args)
err = processSQLiteError(err)
return err
})
return
}
func (stmt *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.QueryContext(context.Background(), toNamedValues(args))
}
func (stmt *SQLiteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
err = retryOnBusy(ctx, func() error {
rows, err = stmt.stmt.QueryContext(ctx, args)
err = processSQLiteError(err)
return err
})
return
}
type conn interface {
driver.Conn
driver.ConnPrepareContext
driver.ExecerContext
driver.QueryerContext
driver.ConnBeginTx
}
type stmt interface {
driver.Stmt
driver.StmtExecContext
driver.StmtQueryContext
}
// retryOnBusy will retry given function on returned 'errBusy'.
func retryOnBusy(ctx context.Context, fn func() error) error {
if err := fn(); err != errBusy {
return err
}
return retryOnBusySlow(ctx, fn)
}
// retryOnBusySlow is the outlined form of retryOnBusy, to allow the fast path (i.e. only
// 1 attempt) to be inlined, leaving the slow retry loop to be a separate function call.
func retryOnBusySlow(ctx context.Context, fn func() error) error {
var backoff time.Duration
for i := 0; ; i++ {
// backoff according to a multiplier of 2ms * 2^2n,
// up to a maximum possible backoff time of 5 minutes.
//
// this works out as the following:
// 4ms
// 16ms
// 64ms
// 256ms
// 1.024s
// 4.096s
// 16.384s
// 1m5.536s
// 4m22.144s
backoff = 2 * time.Millisecond * (1 << (2*i + 1))
if backoff >= 5*time.Minute {
break
}
select {
// Context cancelled.
case <-ctx.Done():
return ctx.Err()
// Backoff for some time.
case <-time.After(backoff):
}
// Perform func.
err := fn()
if err != errBusy {
// May be nil, or may be
// some other error, either
// way return here.
return err
}
}
return gtserror.Newf("%w (waited > %s)", db.ErrBusyTimeout, backoff)
}
// toNamedValues converts older driver.Value types to driver.NamedValue types.
func toNamedValues(args []driver.Value) []driver.NamedValue {
if args == nil {
return nil
}
args2 := make([]driver.NamedValue, len(args))
for i := range args {
args2[i] = driver.NamedValue{
Ordinal: i + 1,
Value: args[i],
}
}
return args2
// register our SQL driver implementations.
sql.Register("pgx-gts", &postgres.Driver{})
sql.Register("sqlite-gts", &sqlite.Driver{})
}

105
internal/db/bundb/errors.go
View File

@ -1,105 +0,0 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package bundb
import (
"database/sql/driver"
"errors"
"github.com/jackc/pgx/v5/pgconn"
"github.com/superseriousbusiness/gotosocial/internal/db"
"modernc.org/sqlite"
sqlite3 "modernc.org/sqlite/lib"
)
// errBusy is a sentinel error indicating
// busy database (e.g. retry needed).
var errBusy = errors.New("busy")
// processPostgresError processes an error, replacing any postgres specific errors with our own error type
func processPostgresError(err error) error {
// Catch nil errs.
if err == nil {
return nil
}
// Attempt to cast as postgres
pgErr, ok := err.(*pgconn.PgError)
if !ok {
return err
}
// Handle supplied error code:
// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
switch pgErr.Code { //nolint
case "23505" /* unique_violation */ :
return db.ErrAlreadyExists
}
return err
}
// processSQLiteError processes an error, replacing any sqlite specific errors with our own error type
func processSQLiteError(err error) error {
// Catch nil errs.
if err == nil {
return nil
}
// Attempt to cast as sqlite
sqliteErr, ok := err.(*sqlite.Error)
if !ok {
return err
}
// Handle supplied error code:
switch sqliteErr.Code() {
case sqlite3.SQLITE_CONSTRAINT_UNIQUE,
sqlite3.SQLITE_CONSTRAINT_PRIMARYKEY:
return db.ErrAlreadyExists
case sqlite3.SQLITE_BUSY,
sqlite3.SQLITE_BUSY_SNAPSHOT,
sqlite3.SQLITE_BUSY_RECOVERY:
return errBusy
case sqlite3.SQLITE_BUSY_TIMEOUT:
return db.ErrBusyTimeout
// WORKAROUND:
// text copied from matrix dev chat:
//
// okay i've found a workaround for now. so between
// v1.29.0 and v1.29.2 (modernc.org/sqlite) is that
// slightly tweaked interruptOnDone() behaviour, which
// causes interrupt to (imo, correctly) get called when
// a context is cancelled to cancel the running query. the
// issue is that every single query after that point seems
// to still then return interrupted. so as you thought,
// maybe that query count isn't being decremented. i don't
// think it's our code, but i haven't ruled it out yet.
//
// the workaround for now is adding to our sqlite error
// processor to replace an SQLITE_INTERRUPTED code with
// driver.ErrBadConn, which hints to the golang sql package
// that the conn needs to be closed and a new one opened
//
case sqlite3.SQLITE_INTERRUPT:
return driver.ErrBadConn
}
return err
}

13
internal/db/bundb/tag_test.go
View File

@ -19,6 +19,7 @@
import (
"context"
"errors"
"testing"
"github.com/stretchr/testify/suite"
@ -82,10 +83,20 @@ func (suite *TagTestSuite) TestPutTag() {
// Subsequent inserts should fail
// since all these tags are equivalent.
suite.ErrorIs(err, db.ErrAlreadyExists)
if !suite.ErrorIs(err, db.ErrAlreadyExists) {
suite.T().Logf("%T(%v) %v", err, err, unwrap(err))
}
}
}
func TestTagTestSuite(t *testing.T) {
suite.Run(t, new(TagTestSuite))
}
func unwrap(err error) (errs []error) {
for err != nil {
errs = append(errs, err)
err = errors.Unwrap(err)
}
return
}

4
internal/db/error.go
View File

@ -29,8 +29,4 @@
// ErrAlreadyExists is returned when a conflict was encountered in the db when doing an insert.
ErrAlreadyExists = errors.New("already exists")
// ErrBusyTimeout is returned if the database connection indicates the connection is too busy
// to complete the supplied query. This is generally intended to be handled internally by the DB.
ErrBusyTimeout = errors.New("busy timeout")
)

209
internal/db/postgres/driver.go Normal file
View File

@ -0,0 +1,209 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package postgres
import (
"context"
"database/sql/driver"
pgx "github.com/jackc/pgx/v5/stdlib"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
var (
// global PostgreSQL driver instances.
postgresDriver = pgx.GetDefaultDriver().(*pgx.Driver)
// check the postgres driver types
// conforms to our interface types.
// (note SQLite doesn't export their
// driver types, and gets checked in
// tests very regularly anywho).
_ connIface = (*pgx.Conn)(nil)
_ stmtIface = (*pgx.Stmt)(nil)
_ rowsIface = (*pgx.Rows)(nil)
)
// Driver is our own wrapper around the
// pgx/stdlib.Driver{} type in order to wrap further
// SQL driver types with our own err processing.
type Driver struct{}
func (d *Driver) Open(name string) (driver.Conn, error) {
conn, err := postgresDriver.Open(name)
if err != nil {
err = processPostgresError(err)
return nil, err
}
return &postgresConn{conn.(connIface)}, nil
}
func (d *Driver) OpenConnector(name string) (driver.Connector, error) {
cc, err := postgresDriver.OpenConnector(name)
if err != nil {
err = processPostgresError(err)
return nil, err
}
return &postgresConnector{driver: d, Connector: cc}, nil
}
type postgresConnector struct {
driver *Driver
driver.Connector
}
func (c *postgresConnector) Driver() driver.Driver { return c.driver }
func (c *postgresConnector) Connect(ctx context.Context) (driver.Conn, error) {
conn, err := c.Connector.Connect(ctx)
if err != nil {
err = processPostgresError(err)
return nil, err
}
return &postgresConn{conn.(connIface)}, nil
}
type postgresConn struct{ connIface }
func (c *postgresConn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *postgresConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
tx, err := c.connIface.BeginTx(ctx, opts)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &postgresTx{tx}, nil
}
func (c *postgresConn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *postgresConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
st, err := c.connIface.PrepareContext(ctx, query)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &postgresStmt{st.(stmtIface)}, nil
}
func (c *postgresConn) Exec(query string, args []driver.Value) (driver.Result, error) {
return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
}
func (c *postgresConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
result, err := c.connIface.ExecContext(ctx, query, args)
err = processPostgresError(err)
return result, err
}
func (c *postgresConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return c.QueryContext(context.Background(), query, db.ToNamedValues(args))
}
func (c *postgresConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
rows, err := c.connIface.QueryContext(ctx, query, args)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &postgresRows{rows.(rowsIface)}, nil
}
func (c *postgresConn) Close() error {
err := c.connIface.Close()
return processPostgresError(err)
}
type postgresTx struct{ driver.Tx }
func (tx *postgresTx) Commit() error {
err := tx.Tx.Commit()
return processPostgresError(err)
}
func (tx *postgresTx) Rollback() error {
err := tx.Tx.Rollback()
return processPostgresError(err)
}
type postgresStmt struct{ stmtIface }
func (stmt *postgresStmt) Exec(args []driver.Value) (driver.Result, error) {
return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *postgresStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
res, err := stmt.stmtIface.ExecContext(ctx, args)
err = processPostgresError(err)
return res, err
}
func (stmt *postgresStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *postgresStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
rows, err := stmt.stmtIface.QueryContext(ctx, args)
err = processPostgresError(err)
if err != nil {
return nil, err
}
return &postgresRows{rows.(rowsIface)}, nil
}
type postgresRows struct{ rowsIface }
func (r *postgresRows) Next(dest []driver.Value) error {
err := r.rowsIface.Next(dest)
err = processPostgresError(err)
return err
}
func (r *postgresRows) Close() error {
err := r.rowsIface.Close()
err = processPostgresError(err)
return err
}
type connIface interface {
driver.Conn
driver.ConnPrepareContext
driver.ExecerContext
driver.QueryerContext
driver.ConnBeginTx
}
type stmtIface interface {
driver.Stmt
driver.StmtExecContext
driver.StmtQueryContext
}
type rowsIface interface {
driver.Rows
driver.RowsColumnTypeDatabaseTypeName
driver.RowsColumnTypeLength
driver.RowsColumnTypePrecisionScale
driver.RowsColumnTypeScanType
driver.RowsColumnTypeScanType
}

46
internal/db/postgres/errors.go Normal file
View File

@ -0,0 +1,46 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package postgres
import (
"fmt"
"github.com/jackc/pgx/v5/pgconn"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
// processPostgresError processes an error, replacing any
// postgres specific errors with our own error type
func processPostgresError(err error) error {
// Attempt to cast as postgres
pgErr, ok := err.(*pgconn.PgError)
if !ok {
return err
}
// Handle supplied error code:
// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
switch pgErr.Code { //nolint
case "23505" /* unique_violation */ :
return db.ErrAlreadyExists
}
// Wrap the returned error with the code and
// extended code for easier debugging later.
return fmt.Errorf("%w (code=%s)", err, pgErr.Code)
}

197
internal/db/sqlite/driver.go Normal file
View File

@ -0,0 +1,197 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//go:build !wasmsqlite3
package sqlite
import (
"context"
"database/sql/driver"
"modernc.org/sqlite"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
// Driver is our own wrapper around the
// sqlite.Driver{} type in order to wrap
// further SQL types with our own
// functionality, e.g. err processing.
type Driver struct{ sqlite.Driver }
func (d *Driver) Open(name string) (driver.Conn, error) {
conn, err := d.Driver.Open(name)
if err != nil {
err = processSQLiteError(err)
return nil, err
}
return &sqliteConn{conn.(connIface)}, nil
}
type sqliteConn struct{ connIface }
func (c *sqliteConn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *sqliteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
tx, err = c.connIface.BeginTx(ctx, opts)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteTx{tx}, nil
}
func (c *sqliteConn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *sqliteConn) PrepareContext(ctx context.Context, query string) (stmt driver.Stmt, err error) {
stmt, err = c.connIface.PrepareContext(ctx, query)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteStmt{stmtIface: stmt.(stmtIface)}, nil
}
func (c *sqliteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
}
func (c *sqliteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (res driver.Result, err error) {
res, err = c.connIface.ExecContext(ctx, query, args)
err = processSQLiteError(err)
return
}
func (c *sqliteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return c.QueryContext(context.Background(), query, db.ToNamedValues(args))
}
func (c *sqliteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (rows driver.Rows, err error) {
rows, err = c.connIface.QueryContext(ctx, query, args)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteRows{rows.(rowsIface)}, nil
}
func (c *sqliteConn) Close() (err error) {
// see: https://www.sqlite.org/pragma.html#pragma_optimize
const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
_, _ = c.connIface.ExecContext(context.Background(), onClose, nil)
// Finally, close the conn.
err = c.connIface.Close()
return
}
type sqliteTx struct{ driver.Tx }
func (tx *sqliteTx) Commit() (err error) {
err = tx.Tx.Commit()
err = processSQLiteError(err)
return
}
func (tx *sqliteTx) Rollback() (err error) {
err = tx.Tx.Rollback()
err = processSQLiteError(err)
return
}
type sqliteStmt struct{ stmtIface }
func (stmt *sqliteStmt) Exec(args []driver.Value) (driver.Result, error) {
return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *sqliteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
res, err = stmt.stmtIface.ExecContext(ctx, args)
err = processSQLiteError(err)
return
}
func (stmt *sqliteStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *sqliteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
rows, err = stmt.stmtIface.QueryContext(ctx, args)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteRows{rows.(rowsIface)}, nil
}
func (stmt *sqliteStmt) Close() (err error) {
err = stmt.stmtIface.Close()
err = processSQLiteError(err)
return
}
type sqliteRows struct{ rowsIface }
func (r *sqliteRows) Next(dest []driver.Value) (err error) {
err = r.rowsIface.Next(dest)
err = processSQLiteError(err)
return
}
func (r *sqliteRows) Close() (err error) {
err = r.rowsIface.Close()
err = processSQLiteError(err)
return
}
// connIface is the driver.Conn interface
// types (and the like) that modernc.org/sqlite.conn
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type connIface interface {
driver.Conn
driver.ConnBeginTx
driver.ConnPrepareContext
driver.ExecerContext
driver.QueryerContext
}
// StmtIface is the driver.Stmt interface
// types (and the like) that modernc.org/sqlite.stmt
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type stmtIface interface {
driver.Stmt
driver.StmtExecContext
driver.StmtQueryContext
}
// RowsIface is the driver.Rows interface
// types (and the like) that modernc.org/sqlite.rows
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type rowsIface interface {
driver.Rows
driver.RowsColumnTypeDatabaseTypeName
driver.RowsColumnTypeLength
driver.RowsColumnTypeScanType
}

211
internal/db/sqlite/driver_wasmsqlite3.go Normal file
View File

@ -0,0 +1,211 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//go:build wasmsqlite3
package sqlite
import (
"context"
"database/sql/driver"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/ncruces/go-sqlite3"
sqlite3driver "github.com/ncruces/go-sqlite3/driver"
_ "github.com/ncruces/go-sqlite3/embed" // embed wasm binary
_ "github.com/ncruces/go-sqlite3/vfs/memdb" // include memdb vfs
)
// Driver is our own wrapper around the
// driver.SQLite{} type in order to wrap
// further SQL types with our own
// functionality, e.g. err processing.
type Driver struct{ sqlite3driver.SQLite }
func (d *Driver) Open(name string) (driver.Conn, error) {
conn, err := d.SQLite.Open(name)
if err != nil {
err = processSQLiteError(err)
return nil, err
}
return &sqliteConn{conn.(connIface)}, nil
}
func (d *Driver) OpenConnector(name string) (driver.Connector, error) {
cc, err := d.SQLite.OpenConnector(name)
if err != nil {
return nil, err
}
return &sqliteConnector{driver: d, Connector: cc}, nil
}
type sqliteConnector struct {
driver *Driver
driver.Connector
}
func (c *sqliteConnector) Driver() driver.Driver { return c.driver }
func (c *sqliteConnector) Connect(ctx context.Context) (driver.Conn, error) {
conn, err := c.Connector.Connect(ctx)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteConn{conn.(connIface)}, nil
}
type sqliteConn struct{ connIface }
func (c *sqliteConn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *sqliteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
tx, err = c.connIface.BeginTx(ctx, opts)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteTx{tx}, nil
}
func (c *sqliteConn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *sqliteConn) PrepareContext(ctx context.Context, query string) (stmt driver.Stmt, err error) {
stmt, err = c.connIface.PrepareContext(ctx, query)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteStmt{stmtIface: stmt.(stmtIface)}, nil
}
func (c *sqliteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
}
func (c *sqliteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (res driver.Result, err error) {
res, err = c.connIface.ExecContext(ctx, query, args)
err = processSQLiteError(err)
return
}
func (c *sqliteConn) Close() (err error) {
// Get acces the underlying raw sqlite3 conn.
raw := c.connIface.(sqlite3.DriverConn).Raw()
// see: https://www.sqlite.org/pragma.html#pragma_optimize
const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
_ = raw.Exec(onClose)
// Finally, close.
err = raw.Close()
return
}
type sqliteTx struct{ driver.Tx }
func (tx *sqliteTx) Commit() (err error) {
err = tx.Tx.Commit()
err = processSQLiteError(err)
return
}
func (tx *sqliteTx) Rollback() (err error) {
err = tx.Tx.Rollback()
err = processSQLiteError(err)
return
}
type sqliteStmt struct{ stmtIface }
func (stmt *sqliteStmt) Exec(args []driver.Value) (driver.Result, error) {
return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *sqliteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
res, err = stmt.stmtIface.ExecContext(ctx, args)
err = processSQLiteError(err)
return
}
func (stmt *sqliteStmt) Query(args []driver.Value) (driver.Rows, error) {
return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
}
func (stmt *sqliteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
rows, err = stmt.stmtIface.QueryContext(ctx, args)
err = processSQLiteError(err)
if err != nil {
return nil, err
}
return &sqliteRows{rows.(rowsIface)}, nil
}
func (stmt *sqliteStmt) Close() (err error) {
err = stmt.stmtIface.Close()
err = processSQLiteError(err)
return
}
type sqliteRows struct{ rowsIface }
func (r *sqliteRows) Next(dest []driver.Value) (err error) {
err = r.rowsIface.Next(dest)
err = processSQLiteError(err)
return
}
func (r *sqliteRows) Close() (err error) {
err = r.rowsIface.Close()
err = processSQLiteError(err)
return
}
// connIface is the driver.Conn interface
// types (and the like) that go-sqlite3/driver.conn
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type connIface interface {
driver.Conn
driver.ConnBeginTx
driver.ConnPrepareContext
driver.ExecerContext
}
// StmtIface is the driver.Stmt interface
// types (and the like) that go-sqlite3/driver.stmt
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type stmtIface interface {
driver.Stmt
driver.StmtExecContext
driver.StmtQueryContext
}
// RowsIface is the driver.Rows interface
// types (and the like) that go-sqlite3/driver.rows
// conforms to. Useful so you don't need
// to repeatedly perform checks yourself.
type rowsIface interface {
driver.Rows
driver.RowsColumnTypeDatabaseTypeName
}

62
internal/db/sqlite/errors.go Normal file
View File

@ -0,0 +1,62 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//go:build !wasmsqlite3
package sqlite
import (
"database/sql/driver"
"fmt"
"modernc.org/sqlite"
sqlite3 "modernc.org/sqlite/lib"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
// processSQLiteError processes an sqlite3.Error to
// handle conversion to any of our common db types.
func processSQLiteError(err error) error {
// Attempt to cast as sqlite error.
sqliteErr, ok := err.(*sqlite.Error)
if !ok {
return err
}
// Handle supplied error code:
switch sqliteErr.Code() {
case sqlite3.SQLITE_CONSTRAINT_UNIQUE,
sqlite3.SQLITE_CONSTRAINT_PRIMARYKEY:
return db.ErrAlreadyExists
// Busy should be very rare, but
// on busy tell the database to close
// the connection, re-open and re-attempt
// which should give a necessary timeout.
case sqlite3.SQLITE_BUSY,
sqlite3.SQLITE_BUSY_RECOVERY,
sqlite3.SQLITE_BUSY_SNAPSHOT:
return driver.ErrBadConn
}
// Wrap the returned error with the code and
// extended code for easier debugging later.
return fmt.Errorf("%w (code=%d)", err,
sqliteErr.Code(),
)
}

60
internal/db/sqlite/errors_wasmsqlite3.go Normal file
View File

@ -0,0 +1,60 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//go:build wasmsqlite3
package sqlite
import (
"database/sql/driver"
"fmt"
"github.com/ncruces/go-sqlite3"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
// processSQLiteError processes an sqlite3.Error to
// handle conversion to any of our common db types.
func processSQLiteError(err error) error {
// Attempt to cast as sqlite error.
sqliteErr, ok := err.(*sqlite3.Error)
if !ok {
return err
}
// Handle supplied error code:
switch sqliteErr.ExtendedCode() {
case sqlite3.CONSTRAINT_UNIQUE,
sqlite3.CONSTRAINT_PRIMARYKEY:
return db.ErrAlreadyExists
// Busy should be very rare, but on
// busy tell the database to close the
// connection, re-open and re-attempt
// which should give necessary timeout.
case sqlite3.BUSY_RECOVERY,
sqlite3.BUSY_SNAPSHOT:
return driver.ErrBadConn
}
// Wrap the returned error with the code and
// extended code for easier debugging later.
return fmt.Errorf("%w (code=%d extended=%d)", err,
sqliteErr.Code(),
sqliteErr.ExtendedCode(),
)
}

35
internal/db/util.go Normal file
View File

@ -0,0 +1,35 @@
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package db
import "database/sql/driver"
// ToNamedValues converts older driver.Value types to driver.NamedValue types.
func ToNamedValues(args []driver.Value) []driver.NamedValue {
if args == nil {
return nil
}
args2 := make([]driver.NamedValue, len(args))
for i := range args {
args2[i] = driver.NamedValue{
Ordinal: i + 1,
Value: args[i],
}
}
return args2
}

4
internal/gtserror/multi_test.go
View File

@ -43,10 +43,6 @@ func TestMultiError(t *testing.T) {
t.Error("should be db.ErrAlreadyExists")
}
if errors.Is(err, db.ErrBusyTimeout) {
t.Error("should not be db.ErrBusyTimeout")
}
errString := err.Error()
expected := `sql: no rows in result set
oopsie woopsie we did a fucky wucky etc

5
internal/util/paging_test.go
View File

@ -30,6 +30,7 @@ type PagingSuite struct {
}
func (suite *PagingSuite) TestPagingStandard() {
config.SetProtocol("https")
config.SetHost("example.org")
params := util.PageableResponseParams{
@ -52,6 +53,7 @@ func (suite *PagingSuite) TestPagingStandard() {
}
func (suite *PagingSuite) TestPagingNoLimit() {
config.SetProtocol("https")
config.SetHost("example.org")
params := util.PageableResponseParams{
@ -73,6 +75,7 @@ func (suite *PagingSuite) TestPagingNoLimit() {
}
func (suite *PagingSuite) TestPagingNoNextID() {
config.SetProtocol("https")
config.SetHost("example.org")
params := util.PageableResponseParams{
@ -94,6 +97,7 @@ func (suite *PagingSuite) TestPagingNoNextID() {
}
func (suite *PagingSuite) TestPagingNoPrevID() {
config.SetProtocol("https")
config.SetHost("example.org")
params := util.PageableResponseParams{
@ -115,6 +119,7 @@ func (suite *PagingSuite) TestPagingNoPrevID() {
}
func (suite *PagingSuite) TestPagingNoItems() {
config.SetProtocol("https")
config.SetHost("example.org")
params := util.PageableResponseParams{

24
test/run-postgres.sh
View File

@ -2,6 +2,11 @@
set -e
# Determine available docker binary
_docker=$(command -v 'podman') || \
_docker=$(command -v 'docker') || \
{ echo 'docker not found'; exit 1; }
# Ensure test args are set.
ARGS=${@}; [ -z "$ARGS" ] && \
ARGS='./...'
@ -10,33 +15,32 @@ ARGS='./...'
DB_NAME='postgres'
DB_USER='postgres'
DB_PASS='postgres'
DB_IP='127.0.0.1'
DB_PORT=5432
# Start postgres container
CID=$(docker run --detach \
CID=$($_docker run --detach \
--publish "${DB_IP}:${DB_PORT}:${DB_PORT}" \
--env "POSTGRES_DB=${DB_NAME}" \
--env "POSTGRES_USER=${DB_USER}" \
--env "POSTGRES_PASSWORD=${DB_PASS}" \
--env "POSTGRES_HOST_AUTH_METHOD=trust" \
--env "PGHOST=0.0.0.0" \
--env "PGPORT=${DB_PORT}" \
'postgres:latest')
'docker.io/postgres:latest')
# On exit kill the container
trap "docker kill ${CID}" exit
trap "$_docker kill ${CID}" exit
sleep 5
#docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "CREATE DATABASE \"${DB_NAME}\" WITH LOCALE \"C.UTF-8\" TEMPLATE \"template0\";"
docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "GRANT ALL PRIVILEGES ON DATABASE \"${DB_NAME}\" TO \"${DB_USER}\";"
# Get running container IP
IP=$(docker container inspect "${CID}" \
--format '{{ .NetworkSettings.IPAddress }}')
$_docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "GRANT ALL PRIVILEGES ON DATABASE \"${DB_NAME}\" TO \"${DB_USER}\";"
env \
GTS_DB_TYPE=postgres \
GTS_DB_ADDRESS=${IP} \
GTS_DB_ADDRESS=${DB_IP} \
GTS_DB_PORT=${DB_PORT} \
GTS_DB_USER=${DB_USER} \
GTS_DB_PASSWORD=${DB_PASS} \
GTS_DB_DATABASE=${DB_NAME} \
go test ./... -p 1 ${ARGS}
go test -p 1 ${ARGS}

263
testrig/config.go
View File

@ -18,8 +18,8 @@
package testrig
import (
"cmp"
"os"
"strconv"
"time"
"codeberg.org/gruf/go-bytesize"
@ -28,128 +28,149 @@
"github.com/superseriousbusiness/gotosocial/internal/language"
)
// InitTestConfig initializes viper configuration with test defaults.
// InitTestConfig initializes viper
// configuration with test defaults.
func InitTestConfig() {
config.Config(func(cfg *config.Configuration) {
*cfg = testDefaults
config.Defaults = testDefaults()
config.Reset()
}
func testDefaults() config.Configuration {
return config.Configuration{
LogLevel: envStr("GTS_LOG_LEVEL", "error"),
LogTimestampFormat: "02/01/2006 15:04:05.000",
LogDbQueries: true,
ApplicationName: "gotosocial",
LandingPageUser: "",
ConfigPath: "",
Host: "localhost:8080",
AccountDomain: "localhost:8080",
Protocol: "http",
BindAddress: "127.0.0.1",
Port: 8080,
TrustedProxies: []string{"127.0.0.1/32", "::1"},
DbType: envStr("GTS_DB_TYPE", "sqlite"),
DbAddress: envStr("GTS_DB_ADDRESS", ":memory:"),
DbPort: envInt("GTS_DB_PORT", 0),
DbUser: envStr("GTS_DB_USER", ""),
DbPassword: envStr("GTS_DB_PASSWORD", ""),
DbDatabase: envStr("GTS_DB_DATABASE", ""),
DbTLSMode: envStr("GTS_DB_TLS_MODE", ""),
DbTLSCACert: envStr("GTS_DB_TLS_CA_CERT", ""),
DbMaxOpenConnsMultiplier: 8,
DbSqliteJournalMode: "WAL",
DbSqliteSynchronous: "NORMAL",
DbSqliteCacheSize: 8 * bytesize.MiB,
DbSqliteBusyTimeout: time.Minute * 5,
WebTemplateBaseDir: "./web/template/",
WebAssetBaseDir: "./web/assets/",
InstanceFederationMode: config.InstanceFederationModeDefault,
InstanceFederationSpamFilter: true,
InstanceExposePeers: true,
InstanceExposeSuspended: true,
InstanceExposeSuspendedWeb: true,
InstanceDeliverToSharedInboxes: true,
InstanceLanguages: language.Languages{
{
TagStr: "nl",
},
{
TagStr: "en-gb",
},
},
AccountsRegistrationOpen: true,
AccountsReasonRequired: true,
AccountsAllowCustomCSS: true,
AccountsCustomCSSLength: 10000,
MediaImageMaxSize: 10485760, // 10MiB
MediaVideoMaxSize: 41943040, // 40MiB
MediaDescriptionMinChars: 0,
MediaDescriptionMaxChars: 500,
MediaRemoteCacheDays: 7,
MediaEmojiLocalMaxSize: 51200, // 50KiB
MediaEmojiRemoteMaxSize: 102400, // 100KiB
MediaCleanupFrom: "00:00", // midnight.
MediaCleanupEvery: 24 * time.Hour, // 1/day.
// the testrig only uses in-memory storage, so we can
// safely set this value to 'test' to avoid running storage
// migrations, and other silly things like that
StorageBackend: "test",
StorageLocalBasePath: "",
StatusesMaxChars: 5000,
StatusesPollMaxOptions: 6,
StatusesPollOptionMaxChars: 50,
StatusesMediaMaxFiles: 6,
LetsEncryptEnabled: false,
LetsEncryptPort: 0,
LetsEncryptCertDir: "",
LetsEncryptEmailAddress: "",
OIDCEnabled: false,
OIDCIdpName: "",
OIDCSkipVerification: false,
OIDCIssuer: "",
OIDCClientID: "",
OIDCClientSecret: "",
OIDCScopes: []string{oidc.ScopeOpenID, "profile", "email", "groups"},
OIDCLinkExisting: false,
OIDCAdminGroups: []string{"adminRole"},
OIDCAllowedGroups: []string{"allowedRole"},
SMTPHost: "",
SMTPPort: 0,
SMTPUsername: "",
SMTPPassword: "",
SMTPFrom: "GoToSocial",
SMTPDiscloseRecipients: false,
TracingEnabled: false,
TracingEndpoint: "localhost:4317",
TracingTransport: "grpc",
TracingInsecureTransport: true,
MetricsEnabled: false,
MetricsAuthEnabled: false,
SyslogEnabled: false,
SyslogProtocol: "udp",
SyslogAddress: "localhost:514",
AdvancedCookiesSamesite: "lax",
AdvancedRateLimitRequests: 0, // disabled
AdvancedThrottlingMultiplier: 0, // disabled
AdvancedSenderMultiplier: 0, // 1 sender only, regardless of CPU
SoftwareVersion: "0.0.0-testrig",
// simply use cache defaults.
Cache: config.Defaults.Cache,
}
}
func envInt(key string, _default int) int {
return env(key, _default, func(value string) int {
i, _ := strconv.Atoi(value)
return i
})
}
var testDefaults = config.Configuration{
LogLevel: cmp.Or(os.Getenv("GTS_LOG_LEVEL"), "error"),
LogTimestampFormat: "02/01/2006 15:04:05.000",
LogDbQueries: true,
ApplicationName: "gotosocial",
LandingPageUser: "",
ConfigPath: "",
Host: "localhost:8080",
AccountDomain: "localhost:8080",
Protocol: "http",
BindAddress: "127.0.0.1",
Port: 8080,
TrustedProxies: []string{"127.0.0.1/32", "::1"},
DbType: "sqlite",
DbAddress: ":memory:",
DbPort: 5432,
DbUser: "postgres",
DbPassword: "postgres",
DbDatabase: "postgres",
DbTLSMode: "disable",
DbTLSCACert: "",
DbMaxOpenConnsMultiplier: 8,
DbSqliteJournalMode: "WAL",
DbSqliteSynchronous: "NORMAL",
DbSqliteCacheSize: 8 * bytesize.MiB,
DbSqliteBusyTimeout: time.Minute * 5,
WebTemplateBaseDir: "./web/template/",
WebAssetBaseDir: "./web/assets/",
InstanceFederationMode: config.InstanceFederationModeDefault,
InstanceFederationSpamFilter: true,
InstanceExposePeers: true,
InstanceExposeSuspended: true,
InstanceExposeSuspendedWeb: true,
InstanceDeliverToSharedInboxes: true,
InstanceLanguages: language.Languages{
{
TagStr: "nl",
},
{
TagStr: "en-gb",
},
},
AccountsRegistrationOpen: true,
AccountsReasonRequired: true,
AccountsAllowCustomCSS: true,
AccountsCustomCSSLength: 10000,
MediaImageMaxSize: 10485760, // 10MiB
MediaVideoMaxSize: 41943040, // 40MiB
MediaDescriptionMinChars: 0,
MediaDescriptionMaxChars: 500,
MediaRemoteCacheDays: 7,
MediaEmojiLocalMaxSize: 51200, // 50KiB
MediaEmojiRemoteMaxSize: 102400, // 100KiB
MediaCleanupFrom: "00:00", // midnight.
MediaCleanupEvery: 24 * time.Hour, // 1/day.
// the testrig only uses in-memory storage, so we can
// safely set this value to 'test' to avoid running storage
// migrations, and other silly things like that
StorageBackend: "test",
StorageLocalBasePath: "",
StatusesMaxChars: 5000,
StatusesPollMaxOptions: 6,
StatusesPollOptionMaxChars: 50,
StatusesMediaMaxFiles: 6,
LetsEncryptEnabled: false,
LetsEncryptPort: 0,
LetsEncryptCertDir: "",
LetsEncryptEmailAddress: "",
OIDCEnabled: false,
OIDCIdpName: "",
OIDCSkipVerification: false,
OIDCIssuer: "",
OIDCClientID: "",
OIDCClientSecret: "",
OIDCScopes: []string{oidc.ScopeOpenID, "profile", "email", "groups"},
OIDCLinkExisting: false,
OIDCAdminGroups: []string{"adminRole"},
OIDCAllowedGroups: []string{"allowedRole"},
SMTPHost: "",
SMTPPort: 0,
SMTPUsername: "",
SMTPPassword: "",
SMTPFrom: "GoToSocial",
SMTPDiscloseRecipients: false,
TracingEnabled: false,
TracingEndpoint: "localhost:4317",
TracingTransport: "grpc",
TracingInsecureTransport: true,
MetricsEnabled: false,
MetricsAuthEnabled: false,
SyslogEnabled: false,
SyslogProtocol: "udp",
SyslogAddress: "localhost:514",
AdvancedCookiesSamesite: "lax",
AdvancedRateLimitRequests: 0, // disabled
AdvancedThrottlingMultiplier: 0, // disabled
AdvancedSenderMultiplier: 0, // 1 sender only, regardless of CPU
AdvancedHeaderFilterMode: config.RequestHeaderFilterModeBlock,
SoftwareVersion: "0.0.0-testrig",
// simply use cache defaults.
Cache: config.Defaults.Cache,
func envStr(key string, _default string) string {
return env(key, _default, func(value string) string {
return value
})
}
func env[T any](key string, _default T, parse func(string) T) T {
value, ok := os.LookupEnv(key)
if ok {
return parse(value)
}
return _default
}

22
testrig/db.go
View File

@ -19,10 +19,7 @@
import (
"context"
"os"
"strconv"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/db/bundb"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@ -84,22 +81,6 @@
// If the environment variable GTS_DB_PORT is set, it will take that
// value as the port instead.
func NewTestDB(state *state.State) db.DB {
if alternateAddress := os.Getenv("GTS_DB_ADDRESS"); alternateAddress != "" {
config.SetDbAddress(alternateAddress)
}
if alternateDBType := os.Getenv("GTS_DB_TYPE"); alternateDBType != "" {
config.SetDbType(alternateDBType)
}
if alternateDBPort := os.Getenv("GTS_DB_PORT"); alternateDBPort != "" {
port, err := strconv.ParseUint(alternateDBPort, 10, 16)
if err != nil {
panic(err)
}
config.SetDbPort(int(port))
}
state.Caches.Init()
testDB, err := bundb.NewBunDBService(context.Background(), state)
@ -374,9 +355,10 @@ func StandardDBTeardown(db db.DB) {
if db == nil {
return
}
defer db.Close()
for _, m := range testModels {
if err := db.DropTable(ctx, m); err != nil {
log.Panic(nil, err)
log.Error(ctx, err)
}
}
}

16
vendor/github.com/ncruces/go-sqlite3/.gitignore generated vendored Normal file
View File

@ -0,0 +1,16 @@
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/
tools

21
vendor/github.com/ncruces/go-sqlite3/LICENSE generated vendored Normal file
View File

@ -0,0 +1,21 @@
MIT License
Copyright (c) 2023 Nuno Cruces
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

113
vendor/github.com/ncruces/go-sqlite3/README.md generated vendored Normal file
View File

@ -0,0 +1,113 @@
# Go bindings to SQLite using Wazero
[![Go Reference](https://pkg.go.dev/badge/image)](https://pkg.go.dev/github.com/ncruces/go-sqlite3)
[![Go Report](https://goreportcard.com/badge/github.com/ncruces/go-sqlite3)](https://goreportcard.com/report/github.com/ncruces/go-sqlite3)
[![Go Coverage](https://github.com/ncruces/go-sqlite3/wiki/coverage.svg)](https://github.com/ncruces/go-sqlite3/wiki/Test-coverage-report)
Go module `github.com/ncruces/go-sqlite3` is a `cgo`-free [SQLite](https://sqlite.org/) wrapper.\
It provides a [`database/sql`](https://pkg.go.dev/database/sql) compatible driver,
as well as direct access to most of the [C SQLite API](https://sqlite.org/cintro.html).
It wraps a [Wasm](https://webassembly.org/) [build](embed/) of SQLite,
and uses [wazero](https://wazero.io/) as the runtime.\
Go, wazero and [`x/sys`](https://pkg.go.dev/golang.org/x/sys) are the _only_ runtime dependencies [^1].
### Packages
- [`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3)
wraps the [C SQLite API](https://sqlite.org/cintro.html)
([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-package)).
- [`github.com/ncruces/go-sqlite3/driver`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver)
provides a [`database/sql`](https://pkg.go.dev/database/sql) driver
([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-package)).
- [`github.com/ncruces/go-sqlite3/embed`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/embed)
embeds a build of SQLite into your application.
- [`github.com/ncruces/go-sqlite3/vfs`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs)
wraps the [C SQLite VFS API](https://sqlite.org/vfs.html) and provides a pure Go implementation.
- [`github.com/ncruces/go-sqlite3/gormlite`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/gormlite)
provides a [GORM](https://gorm.io) driver.
### Extensions
- [`github.com/ncruces/go-sqlite3/ext/array`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/array)
provides the [`array`](https://sqlite.org/carray.html) table-valued function.
- [`github.com/ncruces/go-sqlite3/ext/blobio`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/blobio)
simplifies [incremental BLOB I/O](https://sqlite.org/c3ref/blob_open.html).
- [`github.com/ncruces/go-sqlite3/ext/csv`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/csv)
reads [comma-separated values](https://sqlite.org/csv.html).
- [`github.com/ncruces/go-sqlite3/ext/fileio`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/fileio)
reads, writes and lists files.
- [`github.com/ncruces/go-sqlite3/ext/hash`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/hash)
provides cryptographic hash functions.
- [`github.com/ncruces/go-sqlite3/ext/lines`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/lines)
reads data [line-by-line](https://github.com/asg017/sqlite-lines).
- [`github.com/ncruces/go-sqlite3/ext/pivot`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/pivot)
creates [pivot tables](https://github.com/jakethaw/pivot_vtab).
- [`github.com/ncruces/go-sqlite3/ext/statement`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/statement)
creates [parameterized views](https://github.com/0x09/sqlite-statement-vtab).
- [`github.com/ncruces/go-sqlite3/ext/stats`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/stats)
provides [statistics](https://www.oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html) functions.
- [`github.com/ncruces/go-sqlite3/ext/unicode`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/unicode)
provides [Unicode aware](https://sqlite.org/src/dir/ext/icu) functions.
- [`github.com/ncruces/go-sqlite3/ext/zorder`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/zorder)
maps multidimensional data to one dimension.
- [`github.com/ncruces/go-sqlite3/vfs/memdb`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/memdb)
implements an in-memory VFS.
- [`github.com/ncruces/go-sqlite3/vfs/readervfs`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/readervfs)
implements a VFS for immutable databases.
- [`github.com/ncruces/go-sqlite3/vfs/adiantum`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/adiantum)
wraps a VFS to offer encryption at rest.
### Advanced features
- [incremental BLOB I/O](https://sqlite.org/c3ref/blob_open.html)
- [nested transactions](https://sqlite.org/lang_savepoint.html)
- [custom functions](https://sqlite.org/c3ref/create_function.html)
- [virtual tables](https://sqlite.org/vtab.html)
- [custom VFSes](https://sqlite.org/vfs.html)
- [online backup](https://sqlite.org/backup.html)
- [JSON support](https://sqlite.org/json1.html)
- [math functions](https://sqlite.org/lang_mathfunc.html)
- [full-text search](https://sqlite.org/fts5.html)
- [geospatial search](https://sqlite.org/geopoly.html)
- [encryption at rest](vfs/adiantum/README.md)
- [and more…](embed/README.md)
### Caveats
This module replaces the SQLite [OS Interface](https://sqlite.org/vfs.html)
(aka VFS) with a [pure Go](vfs/) implementation,
which has advantages and disadvantages.
Read more about the Go VFS design [here](vfs/README.md).
### Testing
This project aims for [high test coverage](https://github.com/ncruces/go-sqlite3/wiki/Test-coverage-report).
It also benefits greatly from [SQLite's](https://sqlite.org/testing.html) and
[wazero's](https://tetrate.io/blog/introducing-wazero-from-tetrate/#:~:text=Rock%2Dsolid%20test%20approach) thorough testing.
Every commit is [tested](.github/workflows/test.yml) on
Linux (amd64/arm64/386/riscv64/s390x), macOS (amd64/arm64),
Windows (amd64), FreeBSD (amd64), illumos (amd64), and Solaris (amd64).
The Go VFS is tested by running SQLite's
[mptest](https://github.com/sqlite/sqlite/blob/master/mptest/mptest.c).
### Performance
Perfomance of the [`database/sql`](https://pkg.go.dev/database/sql) driver is
[competitive](https://github.com/cvilsmeier/go-sqlite-bench) with alternatives.
The Wasm and VFS layers are also tested by running SQLite's
[speedtest1](https://github.com/sqlite/sqlite/blob/master/test/speedtest1.c).
### Alternatives
- [`modernc.org/sqlite`](https://pkg.go.dev/modernc.org/sqlite)
- [`crawshaw.io/sqlite`](https://pkg.go.dev/crawshaw.io/sqlite)
- [`github.com/mattn/go-sqlite3`](https://pkg.go.dev/github.com/mattn/go-sqlite3)
- [`github.com/zombiezen/go-sqlite`](https://pkg.go.dev/github.com/zombiezen/go-sqlite)
[^1]: anything else you find in `go.mod` is either a test dependency,
or needed by one of the extensions.

134
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package sqlite3
// Backup is an handle to an ongoing online backup operation.
//
// https://sqlite.org/c3ref/backup.html
type Backup struct {
c *Conn
handle uint32
otherc uint32
}
// Backup backs up srcDB on the src connection to the "main" database in dstURI.
//
// Backup opens the SQLite database file dstURI,
// and blocks until the entire backup is complete.
// Use [Conn.BackupInit] for incremental backup.
//
// https://sqlite.org/backup.html
func (src *Conn) Backup(srcDB, dstURI string) error {
b, err := src.BackupInit(srcDB, dstURI)
if err != nil {
return err
}
defer b.Close()
_, err = b.Step(-1)
return err
}
// Restore restores dstDB on the dst connection from the "main" database in srcURI.
//
// Restore opens the SQLite database file srcURI,
// and blocks until the entire restore is complete.
//
// https://sqlite.org/backup.html
func (dst *Conn) Restore(dstDB, srcURI string) error {
src, err := dst.openDB(srcURI, OPEN_READONLY|OPEN_URI)
if err != nil {
return err
}
b, err := dst.backupInit(dst.handle, dstDB, src, "main")
if err != nil {
return err
}
defer b.Close()
_, err = b.Step(-1)
return err
}
// BackupInit initializes a backup operation to copy the content of one database into another.
//
// BackupInit opens the SQLite database file dstURI,
// then initializes a backup that copies the contents of srcDB on the src connection
// to the "main" database in dstURI.
//
// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupinit
func (src *Conn) BackupInit(srcDB, dstURI string) (*Backup, error) {
dst, err := src.openDB(dstURI, OPEN_READWRITE|OPEN_CREATE|OPEN_URI)
if err != nil {
return nil, err
}
return src.backupInit(dst, "main", src.handle, srcDB)
}
func (c *Conn) backupInit(dst uint32, dstName string, src uint32, srcName string) (*Backup, error) {
defer c.arena.mark()()
dstPtr := c.arena.string(dstName)
srcPtr := c.arena.string(srcName)
other := dst
if c.handle == dst {
other = src
}
r := c.call("sqlite3_backup_init",
uint64(dst), uint64(dstPtr),
uint64(src), uint64(srcPtr))
if r == 0 {
defer c.closeDB(other)
r = c.call("sqlite3_errcode", uint64(dst))
return nil, c.sqlite.error(r, dst)
}
return &Backup{
c: c,
otherc: other,
handle: uint32(r),
}, nil
}
// Close finishes a backup operation.
//
// It is safe to close a nil, zero or closed Backup.
//
// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupfinish
func (b *Backup) Close() error {
if b == nil || b.handle == 0 {
return nil
}
r := b.c.call("sqlite3_backup_finish", uint64(b.handle))
b.c.closeDB(b.otherc)
b.handle = 0
return b.c.error(r)
}
// Step copies up to nPage pages between the source and destination databases.
// If nPage is negative, all remaining source pages are copied.
//
// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupstep
func (b *Backup) Step(nPage int) (done bool, err error) {
r := b.c.call("sqlite3_backup_step", uint64(b.handle), uint64(nPage))
if r == _DONE {
return true, nil
}
return false, b.c.error(r)
}
// Remaining returns the number of pages still to be backed up
// at the conclusion of the most recent [Backup.Step].
//
// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupremaining
func (b *Backup) Remaining() int {
r := b.c.call("sqlite3_backup_remaining", uint64(b.handle))
return int(int32(r))
}
// PageCount returns the total number of pages in the source database
// at the conclusion of the most recent [Backup.Step].
//
// https://sqlite.org/c3ref/backup_finish.html#sqlite3backuppagecount
func (b *Backup) PageCount() int {
r := b.c.call("sqlite3_backup_pagecount", uint64(b.handle))
return int(int32(r))
}

250
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package sqlite3
import (
"io"
"github.com/ncruces/go-sqlite3/internal/util"
)
// ZeroBlob represents a zero-filled, length n BLOB
// that can be used as an argument to
// [database/sql.DB.Exec] and similar methods.
type ZeroBlob int64
// Blob is an handle to an open BLOB.
//
// It implements [io.ReadWriteSeeker] for incremental BLOB I/O.
//
// https://sqlite.org/c3ref/blob.html
type Blob struct {
c *Conn
bytes int64
offset int64
handle uint32
}
var _ io.ReadWriteSeeker = &Blob{}
// OpenBlob opens a BLOB for incremental I/O.
//
// https://sqlite.org/c3ref/blob_open.html
func (c *Conn) OpenBlob(db, table, column string, row int64, write bool) (*Blob, error) {
c.checkInterrupt()
defer c.arena.mark()()
blobPtr := c.arena.new(ptrlen)
dbPtr := c.arena.string(db)
tablePtr := c.arena.string(table)
columnPtr := c.arena.string(column)
var flags uint64
if write {
flags = 1
}
r := c.call("sqlite3_blob_open", uint64(c.handle),
uint64(dbPtr), uint64(tablePtr), uint64(columnPtr),
uint64(row), flags, uint64(blobPtr))
if err := c.error(r); err != nil {
return nil, err
}
blob := Blob{c: c}
blob.handle = util.ReadUint32(c.mod, blobPtr)
blob.bytes = int64(c.call("sqlite3_blob_bytes", uint64(blob.handle)))
return &blob, nil
}
// Close closes a BLOB handle.
//
// It is safe to close a nil, zero or closed Blob.
//
// https://sqlite.org/c3ref/blob_close.html
func (b *Blob) Close() error {
if b == nil || b.handle == 0 {
return nil
}
r := b.c.call("sqlite3_blob_close", uint64(b.handle))
b.handle = 0
return b.c.error(r)
}
// Size returns the size of the BLOB in bytes.
//
// https://sqlite.org/c3ref/blob_bytes.html
func (b *Blob) Size() int64 {
return b.bytes
}
// Read implements the [io.Reader] interface.
//
// https://sqlite.org/c3ref/blob_read.html
func (b *Blob) Read(p []byte) (n int, err error) {
if b.offset >= b.bytes {
return 0, io.EOF
}
avail := b.bytes - b.offset
want := int64(len(p))
if want > avail {
want = avail
}
defer b.c.arena.mark()()
ptr := b.c.arena.new(uint64(want))
r := b.c.call("sqlite3_blob_read", uint64(b.handle),
uint64(ptr), uint64(want), uint64(b.offset))
err = b.c.error(r)
if err != nil {
return 0, err
}
b.offset += want
if b.offset >= b.bytes {
err = io.EOF
}
copy(p, util.View(b.c.mod, ptr, uint64(want)))
return int(want), err
}
// WriteTo implements the [io.WriterTo] interface.
//
// https://sqlite.org/c3ref/blob_read.html
func (b *Blob) WriteTo(w io.Writer) (n int64, err error) {
if b.offset >= b.bytes {
return 0, nil
}
want := int64(1024 * 1024)
avail := b.bytes - b.offset
if want > avail {
want = avail
}
defer b.c.arena.mark()()
ptr := b.c.arena.new(uint64(want))
for want > 0 {
r := b.c.call("sqlite3_blob_read", uint64(b.handle),
uint64(ptr), uint64(want), uint64(b.offset))
err = b.c.error(r)
if err != nil {
return n, err
}
mem := util.View(b.c.mod, ptr, uint64(want))
m, err := w.Write(mem[:want])
b.offset += int64(m)
n += int64(m)
if err != nil {
return n, err
}
if int64(m) != want {
return n, io.ErrShortWrite
}
avail = b.bytes - b.offset
if want > avail {
want = avail
}
}
return n, nil
}
// Write implements the [io.Writer] interface.
//
// https://sqlite.org/c3ref/blob_write.html
func (b *Blob) Write(p []byte) (n int, err error) {
defer b.c.arena.mark()()
ptr := b.c.arena.bytes(p)
r := b.c.call("sqlite3_blob_write", uint64(b.handle),
uint64(ptr), uint64(len(p)), uint64(b.offset))
err = b.c.error(r)
if err != nil {
return 0, err
}
b.offset += int64(len(p))
return len(p), nil
}
// ReadFrom implements the [io.ReaderFrom] interface.
//
// https://sqlite.org/c3ref/blob_write.html
func (b *Blob) ReadFrom(r io.Reader) (n int64, err error) {
want := int64(1024 * 1024)
avail := b.bytes - b.offset
if l, ok := r.(*io.LimitedReader); ok && want > l.N {
want = l.N
}
if want > avail {
want = avail
}
if want < 1 {
want = 1
}
defer b.c.arena.mark()()
ptr := b.c.arena.new(uint64(want))
for {
mem := util.View(b.c.mod, ptr, uint64(want))
m, err := r.Read(mem[:want])
if m > 0 {
r := b.c.call("sqlite3_blob_write", uint64(b.handle),
uint64(ptr), uint64(m), uint64(b.offset))
err := b.c.error(r)
if err != nil {
return n, err
}
b.offset += int64(m)
n += int64(m)
}
if err == io.EOF {
return n, nil
}
if err != nil {
return n, err
}
avail = b.bytes - b.offset
if want > avail {
want = avail
}
if want < 1 {
want = 1
}
}
}
// Seek implements the [io.Seeker] interface.
func (b *Blob) Seek(offset int64, whence int) (int64, error) {
switch whence {
default:
return 0, util.WhenceErr
case io.SeekStart:
break
case io.SeekCurrent:
offset += b.offset
case io.SeekEnd:
offset += b.bytes
}
if offset < 0 {
return 0, util.OffsetErr
}
b.offset = offset
return offset, nil
}
// Reopen moves a BLOB handle to a new row of the same database table.
//
// https://sqlite.org/c3ref/blob_reopen.html
func (b *Blob) Reopen(row int64) error {
err := b.c.error(b.c.call("sqlite3_blob_reopen", uint64(b.handle), uint64(row)))
b.bytes = int64(b.c.call("sqlite3_blob_bytes", uint64(b.handle)))
b.offset = 0
return err
}

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package sqlite3
import (
"context"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/tetratelabs/wazero/api"
)
// Config makes configuration changes to a database connection.
// Only boolean configuration options are supported.
// Called with no arg reads the current configuration value,
// called with one arg sets and returns the new value.
//
// https://sqlite.org/c3ref/db_config.html
func (c *Conn) Config(op DBConfig, arg ...bool) (bool, error) {
defer c.arena.mark()()
argsPtr := c.arena.new(2 * ptrlen)
var flag int
switch {
case len(arg) == 0:
flag = -1
case arg[0]:
flag = 1
}
util.WriteUint32(c.mod, argsPtr+0*ptrlen, uint32(flag))
util.WriteUint32(c.mod, argsPtr+1*ptrlen, argsPtr)
r := c.call("sqlite3_db_config", uint64(c.handle),
uint64(op), uint64(argsPtr))
return util.ReadUint32(c.mod, argsPtr) != 0, c.error(r)
}
// ConfigLog sets up the error logging callback for the connection.
//
// https://sqlite.org/errlog.html
func (c *Conn) ConfigLog(cb func(code ExtendedErrorCode, msg string)) error {
var enable uint64
if cb != nil {
enable = 1
}
r := c.call("sqlite3_config_log_go", enable)
if err := c.error(r); err != nil {
return err
}
c.log = cb
return nil
}
func logCallback(ctx context.Context, mod api.Module, _, iCode, zMsg uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.log != nil {
msg := util.ReadString(mod, zMsg, _MAX_LENGTH)
c.log(xErrorCode(iCode), msg)
}
}
// Limit allows the size of various constructs to be
// limited on a connection by connection basis.
//
// https://sqlite.org/c3ref/limit.html
func (c *Conn) Limit(id LimitCategory, value int) int {
r := c.call("sqlite3_limit", uint64(c.handle), uint64(id), uint64(value))
return int(int32(r))
}
// SetAuthorizer registers an authorizer callback with the database connection.
//
// https://sqlite.org/c3ref/set_authorizer.html
func (c *Conn) SetAuthorizer(cb func(action AuthorizerActionCode, name3rd, name4th, schema, nameInner string) AuthorizerReturnCode) error {
var enable uint64
if cb != nil {
enable = 1
}
r := c.call("sqlite3_set_authorizer_go", uint64(c.handle), enable)
if err := c.error(r); err != nil {
return err
}
c.authorizer = cb
return nil
}
func authorizerCallback(ctx context.Context, mod api.Module, pDB uint32, action AuthorizerActionCode, zName3rd, zName4th, zSchema, zNameInner uint32) (rc AuthorizerReturnCode) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.authorizer != nil {
var name3rd, name4th, schema, nameInner string
if zName3rd != 0 {
name3rd = util.ReadString(mod, zName3rd, _MAX_NAME)
}
if zName4th != 0 {
name4th = util.ReadString(mod, zName4th, _MAX_NAME)
}
if zSchema != 0 {
schema = util.ReadString(mod, zSchema, _MAX_NAME)
}
if zNameInner != 0 {
nameInner = util.ReadString(mod, zNameInner, _MAX_NAME)
}
rc = c.authorizer(action, name3rd, name4th, schema, nameInner)
}
return rc
}
// WalCheckpoint checkpoints a WAL database.
//
// https://sqlite.org/c3ref/wal_checkpoint_v2.html
func (c *Conn) WalCheckpoint(schema string, mode CheckpointMode) (nLog, nCkpt int, err error) {
defer c.arena.mark()()
nLogPtr := c.arena.new(ptrlen)
nCkptPtr := c.arena.new(ptrlen)
schemaPtr := c.arena.string(schema)
r := c.call("sqlite3_wal_checkpoint_v2",
uint64(c.handle), uint64(schemaPtr), uint64(mode),
uint64(nLogPtr), uint64(nCkptPtr))
nLog = int(int32(util.ReadUint32(c.mod, nLogPtr)))
nCkpt = int(int32(util.ReadUint32(c.mod, nCkptPtr)))
return nLog, nCkpt, c.error(r)
}
// WalAutoCheckpoint configures WAL auto-checkpoints.
//
// https://sqlite.org/c3ref/wal_autocheckpoint.html
func (c *Conn) WalAutoCheckpoint(pages int) error {
r := c.call("sqlite3_wal_autocheckpoint", uint64(c.handle), uint64(pages))
return c.error(r)
}
// WalHook registers a callback function to be invoked
// each time data is committed to a database in WAL mode.
//
// https://sqlite.org/c3ref/wal_hook.html
func (c *Conn) WalHook(cb func(db *Conn, schema string, pages int) error) {
var enable uint64
if cb != nil {
enable = 1
}
c.call("sqlite3_wal_hook_go", uint64(c.handle), enable)
c.wal = cb
}
func walCallback(ctx context.Context, mod api.Module, _, pDB, zSchema uint32, pages int32) (rc uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.wal != nil {
schema := util.ReadString(mod, zSchema, _MAX_NAME)
err := c.wal(c, schema, int(pages))
_, rc = errorCode(err, ERROR)
}
return rc
}
// AutoVacuumPages registers a autovacuum compaction amount callback.
//
// https://sqlite.org/c3ref/autovacuum_pages.html
func (c *Conn) AutoVacuumPages(cb func(schema string, dbPages, freePages, bytesPerPage uint) uint) error {
funcPtr := util.AddHandle(c.ctx, cb)
r := c.call("sqlite3_autovacuum_pages_go", uint64(c.handle), uint64(funcPtr))
return c.error(r)
}
func autoVacuumCallback(ctx context.Context, mod api.Module, pApp, zSchema, nDbPage, nFreePage, nBytePerPage uint32) uint32 {
fn := util.GetHandle(ctx, pApp).(func(schema string, dbPages, freePages, bytesPerPage uint) uint)
schema := util.ReadString(mod, zSchema, _MAX_NAME)
return uint32(fn(schema, uint(nDbPage), uint(nFreePage), uint(nBytePerPage)))
}

426
vendor/github.com/ncruces/go-sqlite3/conn.go generated vendored Normal file
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package sqlite3
import (
"context"
"fmt"
"math"
"net/url"
"strings"
"time"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/ncruces/go-sqlite3/vfs"
"github.com/tetratelabs/wazero/api"
)
// Conn is a database connection handle.
// A Conn is not safe for concurrent use by multiple goroutines.
//
// https://sqlite.org/c3ref/sqlite3.html
type Conn struct {
*sqlite
interrupt context.Context
pending *Stmt
busy func(int) bool
log func(xErrorCode, string)
collation func(*Conn, string)
authorizer func(AuthorizerActionCode, string, string, string, string) AuthorizerReturnCode
update func(AuthorizerActionCode, string, string, int64)
commit func() bool
rollback func()
wal func(*Conn, string, int) error
arena arena
handle uint32
}
// Open calls [OpenFlags] with [OPEN_READWRITE], [OPEN_CREATE], [OPEN_URI] and [OPEN_NOFOLLOW].
func Open(filename string) (*Conn, error) {
return newConn(filename, OPEN_READWRITE|OPEN_CREATE|OPEN_URI|OPEN_NOFOLLOW)
}
// OpenFlags opens an SQLite database file as specified by the filename argument.
//
// If none of the required flags is used, a combination of [OPEN_READWRITE] and [OPEN_CREATE] is used.
// If a URI filename is used, PRAGMA statements to execute can be specified using "_pragma":
//
// sqlite3.Open("file:demo.db?_pragma=busy_timeout(10000)")
//
// https://sqlite.org/c3ref/open.html
func OpenFlags(filename string, flags OpenFlag) (*Conn, error) {
if flags&(OPEN_READONLY|OPEN_READWRITE|OPEN_CREATE) == 0 {
flags |= OPEN_READWRITE | OPEN_CREATE
}
return newConn(filename, flags)
}
type connKey struct{}
func newConn(filename string, flags OpenFlag) (conn *Conn, err error) {
sqlite, err := instantiateSQLite()
if err != nil {
return nil, err
}
defer func() {
if conn == nil {
sqlite.close()
}
}()
c := &Conn{sqlite: sqlite}
c.arena = c.newArena(1024)
c.ctx = context.WithValue(c.ctx, connKey{}, c)
c.handle, err = c.openDB(filename, flags)
if err != nil {
return nil, err
}
return c, nil
}
func (c *Conn) openDB(filename string, flags OpenFlag) (uint32, error) {
defer c.arena.mark()()
connPtr := c.arena.new(ptrlen)
namePtr := c.arena.string(filename)
flags |= OPEN_EXRESCODE
r := c.call("sqlite3_open_v2", uint64(namePtr), uint64(connPtr), uint64(flags), 0)
handle := util.ReadUint32(c.mod, connPtr)
if err := c.sqlite.error(r, handle); err != nil {
c.closeDB(handle)
return 0, err
}
if flags|OPEN_URI != 0 && strings.HasPrefix(filename, "file:") {
var pragmas strings.Builder
if _, after, ok := strings.Cut(filename, "?"); ok {
query, _ := url.ParseQuery(after)
for _, p := range query["_pragma"] {
pragmas.WriteString(`PRAGMA `)
pragmas.WriteString(p)
pragmas.WriteString(`;`)
}
}
if pragmas.Len() != 0 {
pragmaPtr := c.arena.string(pragmas.String())
r := c.call("sqlite3_exec", uint64(handle), uint64(pragmaPtr), 0, 0, 0)
if err := c.sqlite.error(r, handle, pragmas.String()); err != nil {
err = fmt.Errorf("sqlite3: invalid _pragma: %w", err)
c.closeDB(handle)
return 0, err
}
}
}
c.call("sqlite3_progress_handler_go", uint64(handle), 100)
return handle, nil
}
func (c *Conn) closeDB(handle uint32) {
r := c.call("sqlite3_close_v2", uint64(handle))
if err := c.sqlite.error(r, handle); err != nil {
panic(err)
}
}
// Close closes the database connection.
//
// If the database connection is associated with unfinalized prepared statements,
// open blob handles, and/or unfinished backup objects,
// Close will leave the database connection open and return [BUSY].
//
// It is safe to close a nil, zero or closed Conn.
//
// https://sqlite.org/c3ref/close.html
func (c *Conn) Close() error {
if c == nil || c.handle == 0 {
return nil
}
c.pending.Close()
c.pending = nil
r := c.call("sqlite3_close", uint64(c.handle))
if err := c.error(r); err != nil {
return err
}
c.handle = 0
return c.close()
}
// Exec is a convenience function that allows an application to run
// multiple statements of SQL without having to use a lot of code.
//
// https://sqlite.org/c3ref/exec.html
func (c *Conn) Exec(sql string) error {
c.checkInterrupt()
defer c.arena.mark()()
sqlPtr := c.arena.string(sql)
r := c.call("sqlite3_exec", uint64(c.handle), uint64(sqlPtr), 0, 0, 0)
return c.error(r, sql)
}
// Prepare calls [Conn.PrepareFlags] with no flags.
func (c *Conn) Prepare(sql string) (stmt *Stmt, tail string, err error) {
return c.PrepareFlags(sql, 0)
}
// PrepareFlags compiles the first SQL statement in sql;
// tail is left pointing to what remains uncompiled.
// If the input text contains no SQL (if the input is an empty string or a comment),
// both stmt and err will be nil.
//
// https://sqlite.org/c3ref/prepare.html
func (c *Conn) PrepareFlags(sql string, flags PrepareFlag) (stmt *Stmt, tail string, err error) {
if len(sql) > _MAX_SQL_LENGTH {
return nil, "", TOOBIG
}
defer c.arena.mark()()
stmtPtr := c.arena.new(ptrlen)
tailPtr := c.arena.new(ptrlen)
sqlPtr := c.arena.string(sql)
r := c.call("sqlite3_prepare_v3", uint64(c.handle),
uint64(sqlPtr), uint64(len(sql)+1), uint64(flags),
uint64(stmtPtr), uint64(tailPtr))
stmt = &Stmt{c: c}
stmt.handle = util.ReadUint32(c.mod, stmtPtr)
if sql := sql[util.ReadUint32(c.mod, tailPtr)-sqlPtr:]; sql != "" {
tail = sql
}
if err := c.error(r, sql); err != nil {
return nil, "", err
}
if stmt.handle == 0 {
return nil, "", nil
}
return stmt, tail, nil
}
// DBName returns the schema name for n-th database on the database connection.
//
// https://sqlite.org/c3ref/db_name.html
func (c *Conn) DBName(n int) string {
r := c.call("sqlite3_db_name", uint64(c.handle), uint64(n))
ptr := uint32(r)
if ptr == 0 {
return ""
}
return util.ReadString(c.mod, ptr, _MAX_NAME)
}
// Filename returns the filename for a database.
//
// https://sqlite.org/c3ref/db_filename.html
func (c *Conn) Filename(schema string) *vfs.Filename {
var ptr uint32
if schema != "" {
defer c.arena.mark()()
ptr = c.arena.string(schema)
}
r := c.call("sqlite3_db_filename", uint64(c.handle), uint64(ptr))
return vfs.OpenFilename(c.ctx, c.mod, uint32(r), vfs.OPEN_MAIN_DB)
}
// ReadOnly determines if a database is read-only.
//
// https://sqlite.org/c3ref/db_readonly.html
func (c *Conn) ReadOnly(schema string) (ro bool, ok bool) {
var ptr uint32
if schema != "" {
defer c.arena.mark()()
ptr = c.arena.string(schema)
}
r := c.call("sqlite3_db_readonly", uint64(c.handle), uint64(ptr))
return int32(r) > 0, int32(r) < 0
}
// GetAutocommit tests the connection for auto-commit mode.
//
// https://sqlite.org/c3ref/get_autocommit.html
func (c *Conn) GetAutocommit() bool {
r := c.call("sqlite3_get_autocommit", uint64(c.handle))
return r != 0
}
// LastInsertRowID returns the rowid of the most recent successful INSERT
// on the database connection.
//
// https://sqlite.org/c3ref/last_insert_rowid.html
func (c *Conn) LastInsertRowID() int64 {
r := c.call("sqlite3_last_insert_rowid", uint64(c.handle))
return int64(r)
}
// SetLastInsertRowID allows the application to set the value returned by
// [Conn.LastInsertRowID].
//
// https://sqlite.org/c3ref/set_last_insert_rowid.html
func (c *Conn) SetLastInsertRowID(id int64) {
c.call("sqlite3_set_last_insert_rowid", uint64(c.handle), uint64(id))
}
// Changes returns the number of rows modified, inserted or deleted
// by the most recently completed INSERT, UPDATE or DELETE statement
// on the database connection.
//
// https://sqlite.org/c3ref/changes.html
func (c *Conn) Changes() int64 {
r := c.call("sqlite3_changes64", uint64(c.handle))
return int64(r)
}
// TotalChanges returns the number of rows modified, inserted or deleted
// by all INSERT, UPDATE or DELETE statements completed
// since the database connection was opened.
//
// https://sqlite.org/c3ref/total_changes.html
func (c *Conn) TotalChanges() int64 {
r := c.call("sqlite3_total_changes64", uint64(c.handle))
return int64(r)
}
// ReleaseMemory frees memory used by a database connection.
//
// https://sqlite.org/c3ref/db_release_memory.html
func (c *Conn) ReleaseMemory() error {
r := c.call("sqlite3_db_release_memory", uint64(c.handle))
return c.error(r)
}
// GetInterrupt gets the context set with [Conn.SetInterrupt],
// or nil if none was set.
func (c *Conn) GetInterrupt() context.Context {
return c.interrupt
}
// SetInterrupt interrupts a long-running query when a context is done.
//
// Subsequent uses of the connection will return [INTERRUPT]
// until the context is reset by another call to SetInterrupt.
//
// To associate a timeout with a connection:
//
// ctx, cancel := context.WithTimeout(context.TODO(), 100*time.Millisecond)
// conn.SetInterrupt(ctx)
// defer cancel()
//
// SetInterrupt returns the old context assigned to the connection.
//
// https://sqlite.org/c3ref/interrupt.html
func (c *Conn) SetInterrupt(ctx context.Context) (old context.Context) {
// Is it the same context?
if ctx == c.interrupt {
return ctx
}
// A busy SQL statement prevents SQLite from ignoring an interrupt
// that comes before any other statements are started.
if c.pending == nil {
c.pending, _, _ = c.Prepare(`WITH RECURSIVE c(x) AS (VALUES(0) UNION ALL SELECT x FROM c) SELECT x FROM c`)
}
old = c.interrupt
c.interrupt = ctx
if old != nil && old.Done() != nil && (ctx == nil || ctx.Err() == nil) {
c.pending.Reset()
}
if ctx != nil && ctx.Done() != nil {
c.pending.Step()
}
return old
}
func (c *Conn) checkInterrupt() {
if c.interrupt != nil && c.interrupt.Err() != nil {
c.call("sqlite3_interrupt", uint64(c.handle))
}
}
func progressCallback(ctx context.Context, mod api.Module, pDB uint32) (interrupt uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB &&
c.interrupt != nil && c.interrupt.Err() != nil {
interrupt = 1
}
return interrupt
}
// BusyTimeout sets a busy timeout.
//
// https://sqlite.org/c3ref/busy_timeout.html
func (c *Conn) BusyTimeout(timeout time.Duration) error {
ms := min((timeout+time.Millisecond-1)/time.Millisecond, math.MaxInt32)
r := c.call("sqlite3_busy_timeout", uint64(c.handle), uint64(ms))
return c.error(r)
}
func timeoutCallback(ctx context.Context, mod api.Module, pDB uint32, count, tmout int32) (retry uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok &&
(c.interrupt == nil || c.interrupt.Err() == nil) {
const delays = "\x01\x02\x05\x0a\x0f\x14\x19\x19\x19\x32\x32\x64"
const totals = "\x00\x01\x03\x08\x12\x21\x35\x4e\x67\x80\xb2\xe4"
const ndelay = int32(len(delays) - 1)
var delay, prior int32
if count <= ndelay {
delay = int32(delays[count])
prior = int32(totals[count])
} else {
delay = int32(delays[ndelay])
prior = int32(totals[ndelay]) + delay*(count-ndelay)
}
if delay = min(delay, tmout-prior); delay > 0 {
time.Sleep(time.Duration(delay) * time.Millisecond)
retry = 1
}
}
return retry
}
// BusyHandler registers a callback to handle [BUSY] errors.
//
// https://sqlite.org/c3ref/busy_handler.html
func (c *Conn) BusyHandler(cb func(count int) (retry bool)) error {
var enable uint64
if cb != nil {
enable = 1
}
r := c.call("sqlite3_busy_handler_go", uint64(c.handle), enable)
if err := c.error(r); err != nil {
return err
}
c.busy = cb
return nil
}
func busyCallback(ctx context.Context, mod api.Module, pDB uint32, count int32) (retry uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.busy != nil &&
(c.interrupt == nil || c.interrupt.Err() == nil) {
if c.busy(int(count)) {
retry = 1
}
}
return retry
}
func (c *Conn) error(rc uint64, sql ...string) error {
return c.sqlite.error(rc, c.handle, sql...)
}
// DriverConn is implemented by the SQLite [database/sql] driver connection.
//
// It can be used to access SQLite features like [online backup].
//
// [online backup]: https://sqlite.org/backup.html
type DriverConn interface {
Raw() *Conn
}

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package sqlite3
import "strconv"
const (
_OK = 0 /* Successful result */
_ROW = 100 /* sqlite3_step() has another row ready */
_DONE = 101 /* sqlite3_step() has finished executing */
_UTF8 = 1
_MAX_NAME = 1e6 // Self-imposed limit for most NUL terminated strings.
_MAX_LENGTH = 1e9
_MAX_SQL_LENGTH = 1e9
_MAX_ALLOCATION_SIZE = 0x7ffffeff
_MAX_FUNCTION_ARG = 100
ptrlen = 4
)
// ErrorCode is a result code that [Error.Code] might return.
//
// https://sqlite.org/rescode.html
type ErrorCode uint8
const (
ERROR ErrorCode = 1 /* Generic error */
INTERNAL ErrorCode = 2 /* Internal logic error in SQLite */
PERM ErrorCode = 3 /* Access permission denied */
ABORT ErrorCode = 4 /* Callback routine requested an abort */
BUSY ErrorCode = 5 /* The database file is locked */
LOCKED ErrorCode = 6 /* A table in the database is locked */
NOMEM ErrorCode = 7 /* A malloc() failed */
READONLY ErrorCode = 8 /* Attempt to write a readonly database */
INTERRUPT ErrorCode = 9 /* Operation terminated by sqlite3_interrupt() */
IOERR ErrorCode = 10 /* Some kind of disk I/O error occurred */
CORRUPT ErrorCode = 11 /* The database disk image is malformed */
NOTFOUND ErrorCode = 12 /* Unknown opcode in sqlite3_file_control() */
FULL ErrorCode = 13 /* Insertion failed because database is full */
CANTOPEN ErrorCode = 14 /* Unable to open the database file */
PROTOCOL ErrorCode = 15 /* Database lock protocol error */
EMPTY ErrorCode = 16 /* Internal use only */
SCHEMA ErrorCode = 17 /* The database schema changed */
TOOBIG ErrorCode = 18 /* String or BLOB exceeds size limit */
CONSTRAINT ErrorCode = 19 /* Abort due to constraint violation */
MISMATCH ErrorCode = 20 /* Data type mismatch */
MISUSE ErrorCode = 21 /* Library used incorrectly */
NOLFS ErrorCode = 22 /* Uses OS features not supported on host */
AUTH ErrorCode = 23 /* Authorization denied */
FORMAT ErrorCode = 24 /* Not used */
RANGE ErrorCode = 25 /* 2nd parameter to sqlite3_bind out of range */
NOTADB ErrorCode = 26 /* File opened that is not a database file */
NOTICE ErrorCode = 27 /* Notifications from sqlite3_log() */
WARNING ErrorCode = 28 /* Warnings from sqlite3_log() */
)
// ExtendedErrorCode is a result code that [Error.ExtendedCode] might return.
//
// https://sqlite.org/rescode.html
type (
ExtendedErrorCode uint16
xErrorCode = ExtendedErrorCode
)
const (
ERROR_MISSING_COLLSEQ ExtendedErrorCode = xErrorCode(ERROR) | (1 << 8)
ERROR_RETRY ExtendedErrorCode = xErrorCode(ERROR) | (2 << 8)
ERROR_SNAPSHOT ExtendedErrorCode = xErrorCode(ERROR) | (3 << 8)
IOERR_READ ExtendedErrorCode = xErrorCode(IOERR) | (1 << 8)
IOERR_SHORT_READ ExtendedErrorCode = xErrorCode(IOERR) | (2 << 8)
IOERR_WRITE ExtendedErrorCode = xErrorCode(IOERR) | (3 << 8)
IOERR_FSYNC ExtendedErrorCode = xErrorCode(IOERR) | (4 << 8)
IOERR_DIR_FSYNC ExtendedErrorCode = xErrorCode(IOERR) | (5 << 8)
IOERR_TRUNCATE ExtendedErrorCode = xErrorCode(IOERR) | (6 << 8)
IOERR_FSTAT ExtendedErrorCode = xErrorCode(IOERR) | (7 << 8)
IOERR_UNLOCK ExtendedErrorCode = xErrorCode(IOERR) | (8 << 8)
IOERR_RDLOCK ExtendedErrorCode = xErrorCode(IOERR) | (9 << 8)
IOERR_DELETE ExtendedErrorCode = xErrorCode(IOERR) | (10 << 8)
IOERR_BLOCKED ExtendedErrorCode = xErrorCode(IOERR) | (11 << 8)
IOERR_NOMEM ExtendedErrorCode = xErrorCode(IOERR) | (12 << 8)
IOERR_ACCESS ExtendedErrorCode = xErrorCode(IOERR) | (13 << 8)
IOERR_CHECKRESERVEDLOCK ExtendedErrorCode = xErrorCode(IOERR) | (14 << 8)
IOERR_LOCK ExtendedErrorCode = xErrorCode(IOERR) | (15 << 8)
IOERR_CLOSE ExtendedErrorCode = xErrorCode(IOERR) | (16 << 8)
IOERR_DIR_CLOSE ExtendedErrorCode = xErrorCode(IOERR) | (17 << 8)
IOERR_SHMOPEN ExtendedErrorCode = xErrorCode(IOERR) | (18 << 8)
IOERR_SHMSIZE ExtendedErrorCode = xErrorCode(IOERR) | (19 << 8)
IOERR_SHMLOCK ExtendedErrorCode = xErrorCode(IOERR) | (20 << 8)
IOERR_SHMMAP ExtendedErrorCode = xErrorCode(IOERR) | (21 << 8)
IOERR_SEEK ExtendedErrorCode = xErrorCode(IOERR) | (22 << 8)
IOERR_DELETE_NOENT ExtendedErrorCode = xErrorCode(IOERR) | (23 << 8)
IOERR_MMAP ExtendedErrorCode = xErrorCode(IOERR) | (24 << 8)
IOERR_GETTEMPPATH ExtendedErrorCode = xErrorCode(IOERR) | (25 << 8)
IOERR_CONVPATH ExtendedErrorCode = xErrorCode(IOERR) | (26 << 8)
IOERR_VNODE ExtendedErrorCode = xErrorCode(IOERR) | (27 << 8)
IOERR_AUTH ExtendedErrorCode = xErrorCode(IOERR) | (28 << 8)
IOERR_BEGIN_ATOMIC ExtendedErrorCode = xErrorCode(IOERR) | (29 << 8)
IOERR_COMMIT_ATOMIC ExtendedErrorCode = xErrorCode(IOERR) | (30 << 8)
IOERR_ROLLBACK_ATOMIC ExtendedErrorCode = xErrorCode(IOERR) | (31 << 8)
IOERR_DATA ExtendedErrorCode = xErrorCode(IOERR) | (32 << 8)
IOERR_CORRUPTFS ExtendedErrorCode = xErrorCode(IOERR) | (33 << 8)
IOERR_IN_PAGE ExtendedErrorCode = xErrorCode(IOERR) | (34 << 8)
LOCKED_SHAREDCACHE ExtendedErrorCode = xErrorCode(LOCKED) | (1 << 8)
LOCKED_VTAB ExtendedErrorCode = xErrorCode(LOCKED) | (2 << 8)
BUSY_RECOVERY ExtendedErrorCode = xErrorCode(BUSY) | (1 << 8)
BUSY_SNAPSHOT ExtendedErrorCode = xErrorCode(BUSY) | (2 << 8)
BUSY_TIMEOUT ExtendedErrorCode = xErrorCode(BUSY) | (3 << 8)
CANTOPEN_NOTEMPDIR ExtendedErrorCode = xErrorCode(CANTOPEN) | (1 << 8)
CANTOPEN_ISDIR ExtendedErrorCode = xErrorCode(CANTOPEN) | (2 << 8)
CANTOPEN_FULLPATH ExtendedErrorCode = xErrorCode(CANTOPEN) | (3 << 8)
CANTOPEN_CONVPATH ExtendedErrorCode = xErrorCode(CANTOPEN) | (4 << 8)
CANTOPEN_DIRTYWAL ExtendedErrorCode = xErrorCode(CANTOPEN) | (5 << 8) /* Not Used */
CANTOPEN_SYMLINK ExtendedErrorCode = xErrorCode(CANTOPEN) | (6 << 8)
CORRUPT_VTAB ExtendedErrorCode = xErrorCode(CORRUPT) | (1 << 8)
CORRUPT_SEQUENCE ExtendedErrorCode = xErrorCode(CORRUPT) | (2 << 8)
CORRUPT_INDEX ExtendedErrorCode = xErrorCode(CORRUPT) | (3 << 8)
READONLY_RECOVERY ExtendedErrorCode = xErrorCode(READONLY) | (1 << 8)
READONLY_CANTLOCK ExtendedErrorCode = xErrorCode(READONLY) | (2 << 8)
READONLY_ROLLBACK ExtendedErrorCode = xErrorCode(READONLY) | (3 << 8)
READONLY_DBMOVED ExtendedErrorCode = xErrorCode(READONLY) | (4 << 8)
READONLY_CANTINIT ExtendedErrorCode = xErrorCode(READONLY) | (5 << 8)
READONLY_DIRECTORY ExtendedErrorCode = xErrorCode(READONLY) | (6 << 8)
ABORT_ROLLBACK ExtendedErrorCode = xErrorCode(ABORT) | (2 << 8)
CONSTRAINT_CHECK ExtendedErrorCode = xErrorCode(CONSTRAINT) | (1 << 8)
CONSTRAINT_COMMITHOOK ExtendedErrorCode = xErrorCode(CONSTRAINT) | (2 << 8)
CONSTRAINT_FOREIGNKEY ExtendedErrorCode = xErrorCode(CONSTRAINT) | (3 << 8)
CONSTRAINT_FUNCTION ExtendedErrorCode = xErrorCode(CONSTRAINT) | (4 << 8)
CONSTRAINT_NOTNULL ExtendedErrorCode = xErrorCode(CONSTRAINT) | (5 << 8)
CONSTRAINT_PRIMARYKEY ExtendedErrorCode = xErrorCode(CONSTRAINT) | (6 << 8)
CONSTRAINT_TRIGGER ExtendedErrorCode = xErrorCode(CONSTRAINT) | (7 << 8)
CONSTRAINT_UNIQUE ExtendedErrorCode = xErrorCode(CONSTRAINT) | (8 << 8)
CONSTRAINT_VTAB ExtendedErrorCode = xErrorCode(CONSTRAINT) | (9 << 8)
CONSTRAINT_ROWID ExtendedErrorCode = xErrorCode(CONSTRAINT) | (10 << 8)
CONSTRAINT_PINNED ExtendedErrorCode = xErrorCode(CONSTRAINT) | (11 << 8)
CONSTRAINT_DATATYPE ExtendedErrorCode = xErrorCode(CONSTRAINT) | (12 << 8)
NOTICE_RECOVER_WAL ExtendedErrorCode = xErrorCode(NOTICE) | (1 << 8)
NOTICE_RECOVER_ROLLBACK ExtendedErrorCode = xErrorCode(NOTICE) | (2 << 8)
NOTICE_RBU ExtendedErrorCode = xErrorCode(NOTICE) | (3 << 8)
WARNING_AUTOINDEX ExtendedErrorCode = xErrorCode(WARNING) | (1 << 8)
AUTH_USER ExtendedErrorCode = xErrorCode(AUTH) | (1 << 8)
)
// OpenFlag is a flag for the [OpenFlags] function.
//
// https://sqlite.org/c3ref/c_open_autoproxy.html
type OpenFlag uint32
const (
OPEN_READONLY OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
OPEN_READWRITE OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
OPEN_CREATE OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
OPEN_URI OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
OPEN_MEMORY OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
OPEN_NOMUTEX OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
OPEN_FULLMUTEX OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
OPEN_SHAREDCACHE OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
OPEN_PRIVATECACHE OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
OPEN_NOFOLLOW OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
OPEN_EXRESCODE OpenFlag = 0x02000000 /* Extended result codes */
)
// PrepareFlag is a flag that can be passed to [Conn.PrepareFlags].
//
// https://sqlite.org/c3ref/c_prepare_normalize.html
type PrepareFlag uint32
const (
PREPARE_PERSISTENT PrepareFlag = 0x01
PREPARE_NORMALIZE PrepareFlag = 0x02
PREPARE_NO_VTAB PrepareFlag = 0x04
)
// FunctionFlag is a flag that can be passed to
// [Conn.CreateFunction] and [Conn.CreateWindowFunction].
//
// https://sqlite.org/c3ref/c_deterministic.html
type FunctionFlag uint32
const (
DETERMINISTIC FunctionFlag = 0x000000800
DIRECTONLY FunctionFlag = 0x000080000
SUBTYPE FunctionFlag = 0x000100000
INNOCUOUS FunctionFlag = 0x000200000
RESULT_SUBTYPE FunctionFlag = 0x001000000
)
// StmtStatus name counter values associated with the [Stmt.Status] method.
//
// https://sqlite.org/c3ref/c_stmtstatus_counter.html
type StmtStatus uint32
const (
STMTSTATUS_FULLSCAN_STEP StmtStatus = 1
STMTSTATUS_SORT StmtStatus = 2
STMTSTATUS_AUTOINDEX StmtStatus = 3
STMTSTATUS_VM_STEP StmtStatus = 4
STMTSTATUS_REPREPARE StmtStatus = 5
STMTSTATUS_RUN StmtStatus = 6
STMTSTATUS_FILTER_MISS StmtStatus = 7
STMTSTATUS_FILTER_HIT StmtStatus = 8
STMTSTATUS_MEMUSED StmtStatus = 99
)
// DBConfig are the available database connection configuration options.
//
// https://sqlite.org/c3ref/c_dbconfig_defensive.html
type DBConfig uint32
const (
// DBCONFIG_MAINDBNAME DBConfig = 1000
// DBCONFIG_LOOKASIDE DBConfig = 1001
DBCONFIG_ENABLE_FKEY DBConfig = 1002
DBCONFIG_ENABLE_TRIGGER DBConfig = 1003
DBCONFIG_ENABLE_FTS3_TOKENIZER DBConfig = 1004
DBCONFIG_ENABLE_LOAD_EXTENSION DBConfig = 1005
DBCONFIG_NO_CKPT_ON_CLOSE DBConfig = 1006
DBCONFIG_ENABLE_QPSG DBConfig = 1007
DBCONFIG_TRIGGER_EQP DBConfig = 1008
DBCONFIG_RESET_DATABASE DBConfig = 1009
DBCONFIG_DEFENSIVE DBConfig = 1010
DBCONFIG_WRITABLE_SCHEMA DBConfig = 1011
DBCONFIG_LEGACY_ALTER_TABLE DBConfig = 1012
DBCONFIG_DQS_DML DBConfig = 1013
DBCONFIG_DQS_DDL DBConfig = 1014
DBCONFIG_ENABLE_VIEW DBConfig = 1015
DBCONFIG_LEGACY_FILE_FORMAT DBConfig = 1016
DBCONFIG_TRUSTED_SCHEMA DBConfig = 1017
DBCONFIG_STMT_SCANSTATUS DBConfig = 1018
DBCONFIG_REVERSE_SCANORDER DBConfig = 1019
)
// LimitCategory are the available run-time limit categories.
//
// https://sqlite.org/c3ref/c_limit_attached.html
type LimitCategory uint32
const (
LIMIT_LENGTH LimitCategory = 0
LIMIT_SQL_LENGTH LimitCategory = 1
LIMIT_COLUMN LimitCategory = 2
LIMIT_EXPR_DEPTH LimitCategory = 3
LIMIT_COMPOUND_SELECT LimitCategory = 4
LIMIT_VDBE_OP LimitCategory = 5
LIMIT_FUNCTION_ARG LimitCategory = 6
LIMIT_ATTACHED LimitCategory = 7
LIMIT_LIKE_PATTERN_LENGTH LimitCategory = 8
LIMIT_VARIABLE_NUMBER LimitCategory = 9
LIMIT_TRIGGER_DEPTH LimitCategory = 10
LIMIT_WORKER_THREADS LimitCategory = 11
)
// AuthorizerActionCode are the integer action codes
// that the authorizer callback may be passed.
//
// https://sqlite.org/c3ref/c_alter_table.html
type AuthorizerActionCode uint32
const (
/***************************************************** 3rd ************ 4th ***********/
AUTH_CREATE_INDEX AuthorizerActionCode = 1 /* Index Name Table Name */
AUTH_CREATE_TABLE AuthorizerActionCode = 2 /* Table Name NULL */
AUTH_CREATE_TEMP_INDEX AuthorizerActionCode = 3 /* Index Name Table Name */
AUTH_CREATE_TEMP_TABLE AuthorizerActionCode = 4 /* Table Name NULL */
AUTH_CREATE_TEMP_TRIGGER AuthorizerActionCode = 5 /* Trigger Name Table Name */
AUTH_CREATE_TEMP_VIEW AuthorizerActionCode = 6 /* View Name NULL */
AUTH_CREATE_TRIGGER AuthorizerActionCode = 7 /* Trigger Name Table Name */
AUTH_CREATE_VIEW AuthorizerActionCode = 8 /* View Name NULL */
AUTH_DELETE AuthorizerActionCode = 9 /* Table Name NULL */
AUTH_DROP_INDEX AuthorizerActionCode = 10 /* Index Name Table Name */
AUTH_DROP_TABLE AuthorizerActionCode = 11 /* Table Name NULL */
AUTH_DROP_TEMP_INDEX AuthorizerActionCode = 12 /* Index Name Table Name */
AUTH_DROP_TEMP_TABLE AuthorizerActionCode = 13 /* Table Name NULL */
AUTH_DROP_TEMP_TRIGGER AuthorizerActionCode = 14 /* Trigger Name Table Name */
AUTH_DROP_TEMP_VIEW AuthorizerActionCode = 15 /* View Name NULL */
AUTH_DROP_TRIGGER AuthorizerActionCode = 16 /* Trigger Name Table Name */
AUTH_DROP_VIEW AuthorizerActionCode = 17 /* View Name NULL */
AUTH_INSERT AuthorizerActionCode = 18 /* Table Name NULL */
AUTH_PRAGMA AuthorizerActionCode = 19 /* Pragma Name 1st arg or NULL */
AUTH_READ AuthorizerActionCode = 20 /* Table Name Column Name */
AUTH_SELECT AuthorizerActionCode = 21 /* NULL NULL */
AUTH_TRANSACTION AuthorizerActionCode = 22 /* Operation NULL */
AUTH_UPDATE AuthorizerActionCode = 23 /* Table Name Column Name */
AUTH_ATTACH AuthorizerActionCode = 24 /* Filename NULL */
AUTH_DETACH AuthorizerActionCode = 25 /* Database Name NULL */
AUTH_ALTER_TABLE AuthorizerActionCode = 26 /* Database Name Table Name */
AUTH_REINDEX AuthorizerActionCode = 27 /* Index Name NULL */
AUTH_ANALYZE AuthorizerActionCode = 28 /* Table Name NULL */
AUTH_CREATE_VTABLE AuthorizerActionCode = 29 /* Table Name Module Name */
AUTH_DROP_VTABLE AuthorizerActionCode = 30 /* Table Name Module Name */
AUTH_FUNCTION AuthorizerActionCode = 31 /* NULL Function Name */
AUTH_SAVEPOINT AuthorizerActionCode = 32 /* Operation Savepoint Name */
AUTH_COPY AuthorizerActionCode = 0 /* No longer used */
AUTH_RECURSIVE AuthorizerActionCode = 33 /* NULL NULL */
)
// AuthorizerReturnCode are the integer codes
// that the authorizer callback may return.
//
// https://sqlite.org/c3ref/c_deny.html
type AuthorizerReturnCode uint32
const (
AUTH_OK AuthorizerReturnCode = 0
AUTH_DENY AuthorizerReturnCode = 1 /* Abort the SQL statement with an error */
AUTH_IGNORE AuthorizerReturnCode = 2 /* Don't allow access, but don't generate an error */
)
// CheckpointMode are all the checkpoint mode values.
//
// https://sqlite.org/c3ref/c_checkpoint_full.html
type CheckpointMode uint32
const (
CHECKPOINT_PASSIVE CheckpointMode = 0 /* Do as much as possible w/o blocking */
CHECKPOINT_FULL CheckpointMode = 1 /* Wait for writers, then checkpoint */
CHECKPOINT_RESTART CheckpointMode = 2 /* Like FULL but wait for readers */
CHECKPOINT_TRUNCATE CheckpointMode = 3 /* Like RESTART but also truncate WAL */
)
// TxnState are the allowed return values from [Conn.TxnState].
//
// https://sqlite.org/c3ref/c_txn_none.html
type TxnState uint32
const (
TXN_NONE TxnState = 0
TXN_READ TxnState = 1
TXN_WRITE TxnState = 2
)
// Datatype is a fundamental datatype of SQLite.
//
// https://sqlite.org/c3ref/c_blob.html
type Datatype uint32
const (
INTEGER Datatype = 1
FLOAT Datatype = 2
TEXT Datatype = 3
BLOB Datatype = 4
NULL Datatype = 5
)
// String implements the [fmt.Stringer] interface.
func (t Datatype) String() string {
const name = "INTEGERFLOATEXTBLOBNULL"
switch t {
case INTEGER:
return name[0:7]
case FLOAT:
return name[7:12]
case TEXT:
return name[11:15]
case BLOB:
return name[15:19]
case NULL:
return name[19:23]
}
return strconv.FormatUint(uint64(t), 10)
}

229
vendor/github.com/ncruces/go-sqlite3/context.go generated vendored Normal file
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package sqlite3
import (
"encoding/json"
"errors"
"math"
"time"
"github.com/ncruces/go-sqlite3/internal/util"
)
// Context is the context in which an SQL function executes.
// An SQLite [Context] is in no way related to a Go [context.Context].
//
// https://sqlite.org/c3ref/context.html
type Context struct {
c *Conn
handle uint32
}
// Conn returns the database connection of the
// [Conn.CreateFunction] or [Conn.CreateWindowFunction]
// routines that originally registered the application defined function.
//
// https://sqlite.org/c3ref/context_db_handle.html
func (ctx Context) Conn() *Conn {
return ctx.c
}
// SetAuxData saves metadata for argument n of the function.
//
// https://sqlite.org/c3ref/get_auxdata.html
func (ctx Context) SetAuxData(n int, data any) {
ptr := util.AddHandle(ctx.c.ctx, data)
ctx.c.call("sqlite3_set_auxdata_go", uint64(ctx.handle), uint64(n), uint64(ptr))
}
// GetAuxData returns metadata for argument n of the function.
//
// https://sqlite.org/c3ref/get_auxdata.html
func (ctx Context) GetAuxData(n int) any {
ptr := uint32(ctx.c.call("sqlite3_get_auxdata", uint64(ctx.handle), uint64(n)))
return util.GetHandle(ctx.c.ctx, ptr)
}
// ResultBool sets the result of the function to a bool.
// SQLite does not have a separate boolean storage class.
// Instead, boolean values are stored as integers 0 (false) and 1 (true).
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultBool(value bool) {
var i int64
if value {
i = 1
}
ctx.ResultInt64(i)
}
// ResultInt sets the result of the function to an int.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultInt(value int) {
ctx.ResultInt64(int64(value))
}
// ResultInt64 sets the result of the function to an int64.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultInt64(value int64) {
ctx.c.call("sqlite3_result_int64",
uint64(ctx.handle), uint64(value))
}
// ResultFloat sets the result of the function to a float64.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultFloat(value float64) {
ctx.c.call("sqlite3_result_double",
uint64(ctx.handle), math.Float64bits(value))
}
// ResultText sets the result of the function to a string.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultText(value string) {
ptr := ctx.c.newString(value)
ctx.c.call("sqlite3_result_text64",
uint64(ctx.handle), uint64(ptr), uint64(len(value)),
uint64(ctx.c.freer), _UTF8)
}
// ResultRawText sets the text result of the function to a []byte.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultRawText(value []byte) {
ptr := ctx.c.newBytes(value)
ctx.c.call("sqlite3_result_text64",
uint64(ctx.handle), uint64(ptr), uint64(len(value)),
uint64(ctx.c.freer), _UTF8)
}
// ResultBlob sets the result of the function to a []byte.
// Returning a nil slice is the same as calling [Context.ResultNull].
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultBlob(value []byte) {
ptr := ctx.c.newBytes(value)
ctx.c.call("sqlite3_result_blob64",
uint64(ctx.handle), uint64(ptr), uint64(len(value)),
uint64(ctx.c.freer))
}
// ResultZeroBlob sets the result of the function to a zero-filled, length n BLOB.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultZeroBlob(n int64) {
ctx.c.call("sqlite3_result_zeroblob64",
uint64(ctx.handle), uint64(n))
}
// ResultNull sets the result of the function to NULL.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultNull() {
ctx.c.call("sqlite3_result_null",
uint64(ctx.handle))
}
// ResultTime sets the result of the function to a [time.Time].
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultTime(value time.Time, format TimeFormat) {
if format == TimeFormatDefault {
ctx.resultRFC3339Nano(value)
return
}
switch v := format.Encode(value).(type) {
case string:
ctx.ResultText(v)
case int64:
ctx.ResultInt64(v)
case float64:
ctx.ResultFloat(v)
default:
panic(util.AssertErr())
}
}
func (ctx Context) resultRFC3339Nano(value time.Time) {
const maxlen = uint64(len(time.RFC3339Nano)) + 5
ptr := ctx.c.new(maxlen)
buf := util.View(ctx.c.mod, ptr, maxlen)
buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
ctx.c.call("sqlite3_result_text64",
uint64(ctx.handle), uint64(ptr), uint64(len(buf)),
uint64(ctx.c.freer), _UTF8)
}
// ResultPointer sets the result of the function to NULL, just like [Context.ResultNull],
// except that it also associates ptr with that NULL value such that it can be retrieved
// within an application-defined SQL function using [Value.Pointer].
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultPointer(ptr any) {
valPtr := util.AddHandle(ctx.c.ctx, ptr)
ctx.c.call("sqlite3_result_pointer_go", uint64(valPtr))
}
// ResultJSON sets the result of the function to the JSON encoding of value.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultJSON(value any) {
data, err := json.Marshal(value)
if err != nil {
ctx.ResultError(err)
return
}
ctx.ResultRawText(data)
}
// ResultValue sets the result of the function to a copy of [Value].
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultValue(value Value) {
if value.c != ctx.c {
ctx.ResultError(MISUSE)
return
}
ctx.c.call("sqlite3_result_value",
uint64(ctx.handle), uint64(value.handle))
}
// ResultError sets the result of the function an error.
//
// https://sqlite.org/c3ref/result_blob.html
func (ctx Context) ResultError(err error) {
if errors.Is(err, NOMEM) {
ctx.c.call("sqlite3_result_error_nomem", uint64(ctx.handle))
return
}
if errors.Is(err, TOOBIG) {
ctx.c.call("sqlite3_result_error_toobig", uint64(ctx.handle))
return
}
msg, code := errorCode(err, _OK)
if msg != "" {
defer ctx.c.arena.mark()()
ptr := ctx.c.arena.string(msg)
ctx.c.call("sqlite3_result_error",
uint64(ctx.handle), uint64(ptr), uint64(len(msg)))
}
if code != _OK {
ctx.c.call("sqlite3_result_error_code",
uint64(ctx.handle), uint64(code))
}
}
// VTabNoChange may return true if a column is being fetched as part
// of an update during which the column value will not change.
//
// https://sqlite.org/c3ref/vtab_nochange.html
func (ctx Context) VTabNoChange() bool {
r := ctx.c.call("sqlite3_vtab_nochange", uint64(ctx.handle))
return r != 0
}

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vendor/github.com/ncruces/go-sqlite3/driver/driver.go generated vendored Normal file
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// Package driver provides a database/sql driver for SQLite.
//
// Importing package driver registers a [database/sql] driver named "sqlite3".
// You may also need to import package embed.
//
// import _ "github.com/ncruces/go-sqlite3/driver"
// import _ "github.com/ncruces/go-sqlite3/embed"
//
// The data source name for "sqlite3" databases can be a filename or a "file:" [URI].
//
// The [TRANSACTION] mode can be specified using "_txlock":
//
// sql.Open("sqlite3", "file:demo.db?_txlock=immediate")
//
// Possible values are: "deferred", "immediate", "exclusive".
// A [read-only] transaction is always "deferred", regardless of "_txlock".
//
// The time encoding/decoding format can be specified using "_timefmt":
//
// sql.Open("sqlite3", "file:demo.db?_timefmt=sqlite")
//
// Possible values are: "auto" (the default), "sqlite", "rfc3339";
// "auto" encodes as RFC 3339 and decodes any [format] supported by SQLite;
// "sqlite" encodes as SQLite and decodes any [format] supported by SQLite;
// "rfc3339" encodes and decodes RFC 3339 only.
//
// [PRAGMA] statements can be specified using "_pragma":
//
// sql.Open("sqlite3", "file:demo.db?_pragma=busy_timeout(10000)")
//
// If no PRAGMAs are specified, a busy timeout of 1 minute is set.
//
// Order matters:
// busy timeout and locking mode should be the first PRAGMAs set, in that order.
//
// [URI]: https://sqlite.org/uri.html
// [PRAGMA]: https://sqlite.org/pragma.html
// [format]: https://sqlite.org/lang_datefunc.html#time_values
// [TRANSACTION]: https://sqlite.org/lang_transaction.html#deferred_immediate_and_exclusive_transactions
// [read-only]: https://pkg.go.dev/database/sql#TxOptions
package driver
import (
"context"
"database/sql"
"database/sql/driver"
"errors"
"fmt"
"io"
"net/url"
"strings"
"time"
"unsafe"
"github.com/ncruces/go-sqlite3"
"github.com/ncruces/go-sqlite3/internal/util"
)
// This variable can be replaced with -ldflags:
//
// go build -ldflags="-X github.com/ncruces/go-sqlite3/driver.driverName=sqlite"
var driverName = "sqlite3"
func init() {
if driverName != "" {
sql.Register(driverName, &SQLite{})
}
}
// Open opens the SQLite database specified by dataSourceName as a [database/sql.DB].
//
// The init function is called by the driver on new connections.
// The [sqlite3.Conn] can be used to execute queries, register functions, etc.
// Any error returned closes the connection and is returned to [database/sql].
func Open(dataSourceName string, init func(*sqlite3.Conn) error) (*sql.DB, error) {
c, err := (&SQLite{Init: init}).OpenConnector(dataSourceName)
if err != nil {
return nil, err
}
return sql.OpenDB(c), nil
}
// SQLite implements [database/sql/driver.Driver].
type SQLite struct {
// Init function is called by the driver on new connections.
// The [sqlite3.Conn] can be used to execute queries, register functions, etc.
// Any error returned closes the connection and is returned to [database/sql].
Init func(*sqlite3.Conn) error
}
// Open implements [database/sql/driver.Driver].
func (d *SQLite) Open(name string) (driver.Conn, error) {
c, err := d.newConnector(name)
if err != nil {
return nil, err
}
return c.Connect(context.Background())
}
// OpenConnector implements [database/sql/driver.DriverContext].
func (d *SQLite) OpenConnector(name string) (driver.Connector, error) {
return d.newConnector(name)
}
func (d *SQLite) newConnector(name string) (*connector, error) {
c := connector{driver: d, name: name}
var txlock, timefmt string
if strings.HasPrefix(name, "file:") {
if _, after, ok := strings.Cut(name, "?"); ok {
query, err := url.ParseQuery(after)
if err != nil {
return nil, err
}
txlock = query.Get("_txlock")
timefmt = query.Get("_timefmt")
c.pragmas = query.Has("_pragma")
}
}
switch txlock {
case "":
c.txBegin = "BEGIN"
case "deferred", "immediate", "exclusive":
c.txBegin = "BEGIN " + txlock
default:
return nil, fmt.Errorf("sqlite3: invalid _txlock: %s", txlock)
}
switch timefmt {
case "":
c.tmRead = sqlite3.TimeFormatAuto
c.tmWrite = sqlite3.TimeFormatDefault
case "sqlite":
c.tmRead = sqlite3.TimeFormatAuto
c.tmWrite = sqlite3.TimeFormat3
case "rfc3339":
c.tmRead = sqlite3.TimeFormatDefault
c.tmWrite = sqlite3.TimeFormatDefault
default:
c.tmRead = sqlite3.TimeFormat(timefmt)
c.tmWrite = sqlite3.TimeFormat(timefmt)
}
return &c, nil
}
type connector struct {
driver *SQLite
name string
txBegin string
tmRead sqlite3.TimeFormat
tmWrite sqlite3.TimeFormat
pragmas bool
}
func (n *connector) Driver() driver.Driver {
return n.driver
}
func (n *connector) Connect(ctx context.Context) (_ driver.Conn, err error) {
c := &conn{
txBegin: n.txBegin,
tmRead: n.tmRead,
tmWrite: n.tmWrite,
}
c.Conn, err = sqlite3.Open(n.name)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
c.Close()
}
}()
old := c.Conn.SetInterrupt(ctx)
defer c.Conn.SetInterrupt(old)
if !n.pragmas {
err = c.Conn.BusyTimeout(60 * time.Second)
if err != nil {
return nil, err
}
}
if n.driver.Init != nil {
err = n.driver.Init(c.Conn)
if err != nil {
return nil, err
}
}
if n.pragmas || n.driver.Init != nil {
s, _, err := c.Conn.Prepare(`PRAGMA query_only`)
if err != nil {
return nil, err
}
if s.Step() && s.ColumnBool(0) {
c.readOnly = '1'
} else {
c.readOnly = '0'
}
err = s.Close()
if err != nil {
return nil, err
}
}
return c, nil
}
type conn struct {
*sqlite3.Conn
txBegin string
txCommit string
txRollback string
tmRead sqlite3.TimeFormat
tmWrite sqlite3.TimeFormat
readOnly byte
}
var (
// Ensure these interfaces are implemented:
_ driver.ConnPrepareContext = &conn{}
_ driver.ExecerContext = &conn{}
_ driver.ConnBeginTx = &conn{}
_ sqlite3.DriverConn = &conn{}
)
func (c *conn) Raw() *sqlite3.Conn {
return c.Conn
}
func (c *conn) Begin() (driver.Tx, error) {
return c.BeginTx(context.Background(), driver.TxOptions{})
}
func (c *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
txBegin := c.txBegin
c.txCommit = `COMMIT`
c.txRollback = `ROLLBACK`
if opts.ReadOnly {
txBegin = `
BEGIN deferred;
PRAGMA query_only=on`
c.txRollback = `
ROLLBACK;
PRAGMA query_only=` + string(c.readOnly)
c.txCommit = c.txRollback
}
switch opts.Isolation {
default:
return nil, util.IsolationErr
case
driver.IsolationLevel(sql.LevelDefault),
driver.IsolationLevel(sql.LevelSerializable):
break
}
old := c.Conn.SetInterrupt(ctx)
defer c.Conn.SetInterrupt(old)
err := c.Conn.Exec(txBegin)
if err != nil {
return nil, err
}
return c, nil
}
func (c *conn) Commit() error {
err := c.Conn.Exec(c.txCommit)
if err != nil && !c.Conn.GetAutocommit() {
c.Rollback()
}
return err
}
func (c *conn) Rollback() error {
err := c.Conn.Exec(c.txRollback)
if errors.Is(err, sqlite3.INTERRUPT) {
old := c.Conn.SetInterrupt(context.Background())
defer c.Conn.SetInterrupt(old)
err = c.Conn.Exec(c.txRollback)
}
return err
}
func (c *conn) Prepare(query string) (driver.Stmt, error) {
return c.PrepareContext(context.Background(), query)
}
func (c *conn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
old := c.Conn.SetInterrupt(ctx)
defer c.Conn.SetInterrupt(old)
s, tail, err := c.Conn.Prepare(query)
if err != nil {
return nil, err
}
if tail != "" {
s.Close()
return nil, util.TailErr
}
return &stmt{Stmt: s, tmRead: c.tmRead, tmWrite: c.tmWrite}, nil
}
func (c *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
if len(args) != 0 {
// Slow path.
return nil, driver.ErrSkip
}
if savept, ok := ctx.(*saveptCtx); ok {
// Called from driver.Savepoint.
savept.Savepoint = c.Conn.Savepoint()
return resultRowsAffected(0), nil
}
old := c.Conn.SetInterrupt(ctx)
defer c.Conn.SetInterrupt(old)
err := c.Conn.Exec(query)
if err != nil {
return nil, err
}
return newResult(c.Conn), nil
}
func (c *conn) CheckNamedValue(arg *driver.NamedValue) error {
return nil
}
type stmt struct {
*sqlite3.Stmt
tmWrite sqlite3.TimeFormat
tmRead sqlite3.TimeFormat
}
var (
// Ensure these interfaces are implemented:
_ driver.StmtExecContext = &stmt{}
_ driver.StmtQueryContext = &stmt{}
_ driver.NamedValueChecker = &stmt{}
)
func (s *stmt) NumInput() int {
n := s.Stmt.BindCount()
for i := 1; i <= n; i++ {
if s.Stmt.BindName(i) != "" {
return -1
}
}
return n
}
// Deprecated: use ExecContext instead.
func (s *stmt) Exec(args []driver.Value) (driver.Result, error) {
return s.ExecContext(context.Background(), namedValues(args))
}
// Deprecated: use QueryContext instead.
func (s *stmt) Query(args []driver.Value) (driver.Rows, error) {
return s.QueryContext(context.Background(), namedValues(args))
}
func (s *stmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
err := s.setupBindings(args)
if err != nil {
return nil, err
}
old := s.Stmt.Conn().SetInterrupt(ctx)
defer s.Stmt.Conn().SetInterrupt(old)
err = s.Stmt.Exec()
if err != nil {
return nil, err
}
return newResult(s.Stmt.Conn()), nil
}
func (s *stmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
err := s.setupBindings(args)
if err != nil {
return nil, err
}
return &rows{ctx: ctx, stmt: s}, nil
}
func (s *stmt) setupBindings(args []driver.NamedValue) error {
err := s.Stmt.ClearBindings()
if err != nil {
return err
}
var ids [3]int
for _, arg := range args {
ids := ids[:0]
if arg.Name == "" {
ids = append(ids, arg.Ordinal)
} else {
for _, prefix := range []string{":", "@", "$"} {
if id := s.Stmt.BindIndex(prefix + arg.Name); id != 0 {
ids = append(ids, id)
}
}
}
for _, id := range ids {
switch a := arg.Value.(type) {
case bool:
err = s.Stmt.BindBool(id, a)
case int:
err = s.Stmt.BindInt(id, a)
case int64:
err = s.Stmt.BindInt64(id, a)
case float64:
err = s.Stmt.BindFloat(id, a)
case string:
err = s.Stmt.BindText(id, a)
case []byte:
err = s.Stmt.BindBlob(id, a)
case sqlite3.ZeroBlob:
err = s.Stmt.BindZeroBlob(id, int64(a))
case time.Time:
err = s.Stmt.BindTime(id, a, s.tmWrite)
case util.JSON:
err = s.Stmt.BindJSON(id, a.Value)
case util.PointerUnwrap:
err = s.Stmt.BindPointer(id, util.UnwrapPointer(a))
case nil:
err = s.Stmt.BindNull(id)
default:
panic(util.AssertErr())
}
}
if err != nil {
return err
}
}
return nil
}
func (s *stmt) CheckNamedValue(arg *driver.NamedValue) error {
switch arg.Value.(type) {
case bool, int, int64, float64, string, []byte,
time.Time, sqlite3.ZeroBlob,
util.JSON, util.PointerUnwrap,
nil:
return nil
default:
return driver.ErrSkip
}
}
func newResult(c *sqlite3.Conn) driver.Result {
rows := c.Changes()
if rows != 0 {
id := c.LastInsertRowID()
if id != 0 {
return result{id, rows}
}
}
return resultRowsAffected(rows)
}
type result struct{ lastInsertId, rowsAffected int64 }
func (r result) LastInsertId() (int64, error) {
return r.lastInsertId, nil
}
func (r result) RowsAffected() (int64, error) {
return r.rowsAffected, nil
}
type resultRowsAffected int64
func (r resultRowsAffected) LastInsertId() (int64, error) {
return 0, nil
}
func (r resultRowsAffected) RowsAffected() (int64, error) {
return int64(r), nil
}
type rows struct {
ctx context.Context
*stmt
names []string
types []string
}
func (r *rows) Close() error {
r.Stmt.ClearBindings()
return r.Stmt.Reset()
}
func (r *rows) Columns() []string {
if r.names == nil {
count := r.Stmt.ColumnCount()
r.names = make([]string, count)
for i := range r.names {
r.names[i] = r.Stmt.ColumnName(i)
}
}
return r.names
}
func (r *rows) declType(index int) string {
if r.types == nil {
count := r.Stmt.ColumnCount()
r.types = make([]string, count)
for i := range r.types {
r.types[i] = strings.ToUpper(r.Stmt.ColumnDeclType(i))
}
}
return r.types[index]
}
func (r *rows) ColumnTypeDatabaseTypeName(index int) string {
decltype := r.declType(index)
if len := len(decltype); len > 0 && decltype[len-1] == ')' {
if i := strings.LastIndexByte(decltype, '('); i >= 0 {
decltype = decltype[:i]
}
}
return strings.TrimSpace(decltype)
}
func (r *rows) Next(dest []driver.Value) error {
old := r.Stmt.Conn().SetInterrupt(r.ctx)
defer r.Stmt.Conn().SetInterrupt(old)
if !r.Stmt.Step() {
if err := r.Stmt.Err(); err != nil {
return err
}
return io.EOF
}
data := unsafe.Slice((*any)(unsafe.SliceData(dest)), len(dest))
err := r.Stmt.Columns(data)
for i := range dest {
if t, ok := r.decodeTime(i, dest[i]); ok {
dest[i] = t
continue
}
if s, ok := dest[i].(string); ok {
t, ok := maybeTime(s)
if ok {
dest[i] = t
}
}
}
return err
}
func (r *rows) decodeTime(i int, v any) (_ time.Time, _ bool) {
if r.tmRead == sqlite3.TimeFormatDefault {
return
}
switch r.declType(i) {
case "DATE", "TIME", "DATETIME", "TIMESTAMP":
// maybe
default:
return
}
switch v.(type) {
case int64, float64, string:
// maybe
default:
return
}
t, err := r.tmRead.Decode(v)
return t, err == nil
}

27
vendor/github.com/ncruces/go-sqlite3/driver/savepoint.go generated vendored Normal file
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package driver
import (
"database/sql"
"time"
"github.com/ncruces/go-sqlite3"
)
// Savepoint establishes a new transaction savepoint.
//
// https://sqlite.org/lang_savepoint.html
func Savepoint(tx *sql.Tx) sqlite3.Savepoint {
var ctx saveptCtx
tx.ExecContext(&ctx, "")
return ctx.Savepoint
}
type saveptCtx struct{ sqlite3.Savepoint }
func (*saveptCtx) Deadline() (deadline time.Time, ok bool) { return }
func (*saveptCtx) Done() <-chan struct{} { return nil }
func (*saveptCtx) Err() error { return nil }
func (*saveptCtx) Value(key any) any { return nil }

31
vendor/github.com/ncruces/go-sqlite3/driver/time.go generated vendored Normal file
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package driver
import (
"time"
)
// Convert a string in [time.RFC3339Nano] format into a [time.Time]
// if it roundtrips back to the same string.
// This way times can be persisted to, and recovered from, the database,
// but if a string is needed, [database/sql] will recover the same string.
func maybeTime(text string) (_ time.Time, _ bool) {
// Weed out (some) values that can't possibly be
// [time.RFC3339Nano] timestamps.
if len(text) < len("2006-01-02T15:04:05Z") {
return
}
if len(text) > len(time.RFC3339Nano) {
return
}
if text[4] != '-' || text[10] != 'T' || text[16] != ':' {
return
}
// Slow path.
var buf [len(time.RFC3339Nano)]byte
date, err := time.Parse(time.RFC3339Nano, text)
if err == nil && text == string(date.AppendFormat(buf[:0], time.RFC3339Nano)) {
return date, true
}
return
}

14
vendor/github.com/ncruces/go-sqlite3/driver/util.go generated vendored Normal file
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package driver
import "database/sql/driver"
func namedValues(args []driver.Value) []driver.NamedValue {
named := make([]driver.NamedValue, len(args))
for i, v := range args {
named[i] = driver.NamedValue{
Ordinal: i + 1,
Value: v,
}
}
return named
}

27
vendor/github.com/ncruces/go-sqlite3/embed/README.md generated vendored Normal file
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# Embeddable Wasm build of SQLite
This folder includes an embeddable Wasm build of SQLite 3.46.0 for use with
[`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3).
The following optional features are compiled in:
- [math functions](https://sqlite.org/lang_mathfunc.html)
- [FTS5](https://sqlite.org/fts5.html)
- [JSON](https://sqlite.org/json1.html)
- [R*Tree](https://sqlite.org/rtree.html)
- [GeoPoly](https://sqlite.org/geopoly.html)
- [soundex](https://sqlite.org/lang_corefunc.html#soundex)
- [stat4](https://sqlite.org/compile.html#enable_stat4)
- [base64](https://github.com/sqlite/sqlite/blob/master/ext/misc/base64.c)
- [decimal](https://github.com/sqlite/sqlite/blob/master/ext/misc/decimal.c)
- [ieee754](https://github.com/sqlite/sqlite/blob/master/ext/misc/ieee754.c)
- [regexp](https://github.com/sqlite/sqlite/blob/master/ext/misc/regexp.c)
- [series](https://github.com/sqlite/sqlite/blob/master/ext/misc/series.c)
- [uint](https://github.com/sqlite/sqlite/blob/master/ext/misc/uint.c)
- [uuid](https://github.com/sqlite/sqlite/blob/master/ext/misc/uuid.c)
- [time](../sqlite3/time.c)
See the [configuration options](../sqlite3/sqlite_cfg.h),
and [patches](../sqlite3) applied.
Built using [`wasi-sdk`](https://github.com/WebAssembly/wasi-sdk),
and [`binaryen`](https://github.com/WebAssembly/binaryen).

32
vendor/github.com/ncruces/go-sqlite3/embed/build.sh generated vendored Normal file
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#!/usr/bin/env bash
set -euo pipefail
cd -P -- "$(dirname -- "$0")"
ROOT=../
BINARYEN="$ROOT/tools/binaryen-version_117/bin"
WASI_SDK="$ROOT/tools/wasi-sdk-22.0/bin"
"$WASI_SDK/clang" --target=wasm32-wasi -std=c17 -flto -g0 -O2 \
-Wall -Wextra -Wno-unused-parameter -Wno-unused-function \
-o sqlite3.wasm "$ROOT/sqlite3/main.c" \
-I"$ROOT/sqlite3" \
-mexec-model=reactor \
-msimd128 -mmutable-globals \
-mbulk-memory -mreference-types \
-mnontrapping-fptoint -msign-ext \
-fno-stack-protector -fno-stack-clash-protection \
-Wl,--initial-memory=327680 \
-Wl,--stack-first \
-Wl,--import-undefined \
-D_HAVE_SQLITE_CONFIG_H \
-DSQLITE_CUSTOM_INCLUDE=sqlite_opt.h \
$(awk '{print "-Wl,--export="$0}' exports.txt)
trap 'rm -f sqlite3.tmp' EXIT
"$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
sqlite3.tmp -o sqlite3.wasm \
--enable-simd --enable-mutable-globals --enable-multivalue \
--enable-bulk-memory --enable-reference-types \
--enable-nontrapping-float-to-int --enable-sign-ext

130
vendor/github.com/ncruces/go-sqlite3/embed/exports.txt generated vendored Normal file
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aligned_alloc
free
malloc
malloc_destructor
sqlite3_anycollseq_init
sqlite3_autovacuum_pages_go
sqlite3_backup_finish
sqlite3_backup_init
sqlite3_backup_pagecount
sqlite3_backup_remaining
sqlite3_backup_step
sqlite3_bind_blob64
sqlite3_bind_double
sqlite3_bind_int64
sqlite3_bind_null
sqlite3_bind_parameter_count
sqlite3_bind_parameter_index
sqlite3_bind_parameter_name
sqlite3_bind_pointer_go
sqlite3_bind_text64
sqlite3_bind_value
sqlite3_bind_zeroblob64
sqlite3_blob_bytes
sqlite3_blob_close
sqlite3_blob_open
sqlite3_blob_read
sqlite3_blob_reopen
sqlite3_blob_write
sqlite3_busy_handler_go
sqlite3_busy_timeout
sqlite3_changes64
sqlite3_clear_bindings
sqlite3_close
sqlite3_close_v2
sqlite3_collation_needed_go
sqlite3_column_blob
sqlite3_column_bytes
sqlite3_column_count
sqlite3_column_database_name
sqlite3_column_decltype
sqlite3_column_double
sqlite3_column_int64
sqlite3_column_name
sqlite3_column_origin_name
sqlite3_column_table_name
sqlite3_column_text
sqlite3_column_type
sqlite3_column_value
sqlite3_columns_go
sqlite3_commit_hook_go
sqlite3_config_log_go
sqlite3_create_aggregate_function_go
sqlite3_create_collation_go
sqlite3_create_function_go
sqlite3_create_module_go
sqlite3_create_window_function_go
sqlite3_database_file_object
sqlite3_db_config
sqlite3_db_filename
sqlite3_db_name
sqlite3_db_readonly
sqlite3_db_release_memory
sqlite3_declare_vtab
sqlite3_errcode
sqlite3_errmsg
sqlite3_error_offset
sqlite3_errstr
sqlite3_exec
sqlite3_filename_database
sqlite3_filename_journal
sqlite3_filename_wal
sqlite3_finalize
sqlite3_get_autocommit
sqlite3_get_auxdata
sqlite3_interrupt
sqlite3_last_insert_rowid
sqlite3_limit
sqlite3_open_v2
sqlite3_overload_function
sqlite3_prepare_v3
sqlite3_progress_handler_go
sqlite3_reset
sqlite3_result_blob64
sqlite3_result_double
sqlite3_result_error
sqlite3_result_error_code
sqlite3_result_error_nomem
sqlite3_result_error_toobig
sqlite3_result_int64
sqlite3_result_null
sqlite3_result_pointer_go
sqlite3_result_text64
sqlite3_result_value
sqlite3_result_zeroblob64
sqlite3_rollback_hook_go
sqlite3_set_authorizer_go
sqlite3_set_auxdata_go
sqlite3_set_last_insert_rowid
sqlite3_step
sqlite3_stmt_busy
sqlite3_stmt_readonly
sqlite3_stmt_status
sqlite3_total_changes64
sqlite3_txn_state
sqlite3_update_hook_go
sqlite3_uri_key
sqlite3_uri_parameter
sqlite3_value_blob
sqlite3_value_bytes
sqlite3_value_double
sqlite3_value_dup
sqlite3_value_free
sqlite3_value_int64
sqlite3_value_nochange
sqlite3_value_numeric_type
sqlite3_value_pointer_go
sqlite3_value_text
sqlite3_value_type
sqlite3_vtab_collation
sqlite3_vtab_config_go
sqlite3_vtab_distinct
sqlite3_vtab_in
sqlite3_vtab_in_first
sqlite3_vtab_in_next
sqlite3_vtab_nochange
sqlite3_vtab_on_conflict
sqlite3_vtab_rhs_value
sqlite3_wal_autocheckpoint
sqlite3_wal_checkpoint_v2
sqlite3_wal_hook_go

20
vendor/github.com/ncruces/go-sqlite3/embed/init.go generated vendored Normal file
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// Package embed embeds SQLite into your application.
//
// Importing package embed initializes the [sqlite3.Binary] variable
// with an appropriate build of SQLite:
//
// import _ "github.com/ncruces/go-sqlite3/embed"
package embed
import (
_ "embed"
"github.com/ncruces/go-sqlite3"
)
//go:embed sqlite3.wasm
var binary []byte
func init() {
sqlite3.Binary = binary
}

BIN
vendor/github.com/ncruces/go-sqlite3/embed/sqlite3.wasm generated vendored Normal file
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Binary file not shown.

162
vendor/github.com/ncruces/go-sqlite3/error.go generated vendored Normal file
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package sqlite3
import (
"errors"
"strconv"
"strings"
"github.com/ncruces/go-sqlite3/internal/util"
)
// Error wraps an SQLite Error Code.
//
// https://sqlite.org/c3ref/errcode.html
type Error struct {
str string
msg string
sql string
code uint64
}
// Code returns the primary error code for this error.
//
// https://sqlite.org/rescode.html
func (e *Error) Code() ErrorCode {
return ErrorCode(e.code)
}
// ExtendedCode returns the extended error code for this error.
//
// https://sqlite.org/rescode.html
func (e *Error) ExtendedCode() ExtendedErrorCode {
return ExtendedErrorCode(e.code)
}
// Error implements the error interface.
func (e *Error) Error() string {
var b strings.Builder
b.WriteString("sqlite3: ")
if e.str != "" {
b.WriteString(e.str)
} else {
b.WriteString(strconv.Itoa(int(e.code)))
}
if e.msg != "" {
b.WriteString(": ")
b.WriteString(e.msg)
}
return b.String()
}
// Is tests whether this error matches a given [ErrorCode] or [ExtendedErrorCode].
//
// It makes it possible to do:
//
// if errors.Is(err, sqlite3.BUSY) {
// // ... handle BUSY
// }
func (e *Error) Is(err error) bool {
switch c := err.(type) {
case ErrorCode:
return c == e.Code()
case ExtendedErrorCode:
return c == e.ExtendedCode()
}
return false
}
// As converts this error to an [ErrorCode] or [ExtendedErrorCode].
func (e *Error) As(err any) bool {
switch c := err.(type) {
case *ErrorCode:
*c = e.Code()
return true
case *ExtendedErrorCode:
*c = e.ExtendedCode()
return true
}
return false
}
// Temporary returns true for [BUSY] errors.
func (e *Error) Temporary() bool {
return e.Code() == BUSY
}
// Timeout returns true for [BUSY_TIMEOUT] errors.
func (e *Error) Timeout() bool {
return e.ExtendedCode() == BUSY_TIMEOUT
}
// SQL returns the SQL starting at the token that triggered a syntax error.
func (e *Error) SQL() string {
return e.sql
}
// Error implements the error interface.
func (e ErrorCode) Error() string {
return util.ErrorCodeString(uint32(e))
}
// Temporary returns true for [BUSY] errors.
func (e ErrorCode) Temporary() bool {
return e == BUSY
}
// Error implements the error interface.
func (e ExtendedErrorCode) Error() string {
return util.ErrorCodeString(uint32(e))
}
// Is tests whether this error matches a given [ErrorCode].
func (e ExtendedErrorCode) Is(err error) bool {
c, ok := err.(ErrorCode)
return ok && c == ErrorCode(e)
}
// As converts this error to an [ErrorCode].
func (e ExtendedErrorCode) As(err any) bool {
c, ok := err.(*ErrorCode)
if ok {
*c = ErrorCode(e)
}
return ok
}
// Temporary returns true for [BUSY] errors.
func (e ExtendedErrorCode) Temporary() bool {
return ErrorCode(e) == BUSY
}
// Timeout returns true for [BUSY_TIMEOUT] errors.
func (e ExtendedErrorCode) Timeout() bool {
return e == BUSY_TIMEOUT
}
func errorCode(err error, def ErrorCode) (msg string, code uint32) {
switch code := err.(type) {
case nil:
return "", _OK
case ErrorCode:
return "", uint32(code)
case xErrorCode:
return "", uint32(code)
case *Error:
return code.msg, uint32(code.code)
}
var ecode ErrorCode
var xcode xErrorCode
switch {
case errors.As(err, &xcode):
code = uint32(xcode)
case errors.As(err, &ecode):
code = uint32(ecode)
default:
code = uint32(def)
}
return err.Error(), code
}

214
vendor/github.com/ncruces/go-sqlite3/func.go generated vendored Normal file
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package sqlite3
import (
"context"
"sync"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/tetratelabs/wazero/api"
)
// CollationNeeded registers a callback to be invoked
// whenever an unknown collation sequence is required.
//
// https://sqlite.org/c3ref/collation_needed.html
func (c *Conn) CollationNeeded(cb func(db *Conn, name string)) error {
var enable uint64
if cb != nil {
enable = 1
}
r := c.call("sqlite3_collation_needed_go", uint64(c.handle), enable)
if err := c.error(r); err != nil {
return err
}
c.collation = cb
return nil
}
// AnyCollationNeeded uses [Conn.CollationNeeded] to register
// a fake collating function for any unknown collating sequence.
// The fake collating function works like BINARY.
//
// This can be used to load schemas that contain
// one or more unknown collating sequences.
func (c *Conn) AnyCollationNeeded() {
c.call("sqlite3_anycollseq_init", uint64(c.handle), 0, 0)
}
// CreateCollation defines a new collating sequence.
//
// https://sqlite.org/c3ref/create_collation.html
func (c *Conn) CreateCollation(name string, fn func(a, b []byte) int) error {
defer c.arena.mark()()
namePtr := c.arena.string(name)
funcPtr := util.AddHandle(c.ctx, fn)
r := c.call("sqlite3_create_collation_go",
uint64(c.handle), uint64(namePtr), uint64(funcPtr))
return c.error(r)
}
// CreateFunction defines a new scalar SQL function.
//
// https://sqlite.org/c3ref/create_function.html
func (c *Conn) CreateFunction(name string, nArg int, flag FunctionFlag, fn ScalarFunction) error {
defer c.arena.mark()()
namePtr := c.arena.string(name)
funcPtr := util.AddHandle(c.ctx, fn)
r := c.call("sqlite3_create_function_go",
uint64(c.handle), uint64(namePtr), uint64(nArg),
uint64(flag), uint64(funcPtr))
return c.error(r)
}
// ScalarFunction is the type of a scalar SQL function.
// Implementations must not retain arg.
type ScalarFunction func(ctx Context, arg ...Value)
// CreateWindowFunction defines a new aggregate or aggregate window SQL function.
// If fn returns a [WindowFunction], then an aggregate window function is created.
// If fn returns an [io.Closer], it will be called to free resources.
//
// https://sqlite.org/c3ref/create_function.html
func (c *Conn) CreateWindowFunction(name string, nArg int, flag FunctionFlag, fn func() AggregateFunction) error {
defer c.arena.mark()()
call := "sqlite3_create_aggregate_function_go"
namePtr := c.arena.string(name)
funcPtr := util.AddHandle(c.ctx, fn)
if _, ok := fn().(WindowFunction); ok {
call = "sqlite3_create_window_function_go"
}
r := c.call(call,
uint64(c.handle), uint64(namePtr), uint64(nArg),
uint64(flag), uint64(funcPtr))
return c.error(r)
}
// AggregateFunction is the interface an aggregate function should implement.
//
// https://sqlite.org/appfunc.html
type AggregateFunction interface {
// Step is invoked to add a row to the current window.
// The function arguments, if any, corresponding to the row being added, are passed to Step.
// Implementations must not retain arg.
Step(ctx Context, arg ...Value)
// Value is invoked to return the current (or final) value of the aggregate.
Value(ctx Context)
}
// WindowFunction is the interface an aggregate window function should implement.
//
// https://sqlite.org/windowfunctions.html
type WindowFunction interface {
AggregateFunction
// Inverse is invoked to remove the oldest presently aggregated result of Step from the current window.
// The function arguments, if any, are those passed to Step for the row being removed.
// Implementations must not retain arg.
Inverse(ctx Context, arg ...Value)
}
// OverloadFunction overloads a function for a virtual table.
//
// https://sqlite.org/c3ref/overload_function.html
func (c *Conn) OverloadFunction(name string, nArg int) error {
defer c.arena.mark()()
namePtr := c.arena.string(name)
r := c.call("sqlite3_overload_function",
uint64(c.handle), uint64(namePtr), uint64(nArg))
return c.error(r)
}
func destroyCallback(ctx context.Context, mod api.Module, pApp uint32) {
util.DelHandle(ctx, pApp)
}
func collationCallback(ctx context.Context, mod api.Module, pArg, pDB, eTextRep, zName uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.collation != nil {
name := util.ReadString(mod, zName, _MAX_NAME)
c.collation(c, name)
}
}
func compareCallback(ctx context.Context, mod api.Module, pApp, nKey1, pKey1, nKey2, pKey2 uint32) uint32 {
fn := util.GetHandle(ctx, pApp).(func(a, b []byte) int)
return uint32(fn(util.View(mod, pKey1, uint64(nKey1)), util.View(mod, pKey2, uint64(nKey2))))
}
func funcCallback(ctx context.Context, mod api.Module, pCtx, pApp, nArg, pArg uint32) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
fn := util.GetHandle(db.ctx, pApp).(ScalarFunction)
callbackArgs(db, args[:nArg], pArg)
fn(Context{db, pCtx}, args[:nArg]...)
}
func stepCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp, nArg, pArg uint32) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
callbackArgs(db, args[:nArg], pArg)
fn, _ := callbackAggregate(db, pAgg, pApp)
fn.Step(Context{db, pCtx}, args[:nArg]...)
}
func finalCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp uint32) {
db := ctx.Value(connKey{}).(*Conn)
fn, handle := callbackAggregate(db, pAgg, pApp)
fn.Value(Context{db, pCtx})
util.DelHandle(ctx, handle)
}
func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg uint32) {
db := ctx.Value(connKey{}).(*Conn)
fn := util.GetHandle(db.ctx, pAgg).(AggregateFunction)
fn.Value(Context{db, pCtx})
}
func inverseCallback(ctx context.Context, mod api.Module, pCtx, pAgg, nArg, pArg uint32) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
callbackArgs(db, args[:nArg], pArg)
fn := util.GetHandle(db.ctx, pAgg).(WindowFunction)
fn.Inverse(Context{db, pCtx}, args[:nArg]...)
}
func callbackAggregate(db *Conn, pAgg, pApp uint32) (AggregateFunction, uint32) {
if pApp == 0 {
handle := util.ReadUint32(db.mod, pAgg)
return util.GetHandle(db.ctx, handle).(AggregateFunction), handle
}
// We need to create the aggregate.
fn := util.GetHandle(db.ctx, pApp).(func() AggregateFunction)()
handle := util.AddHandle(db.ctx, fn)
if pAgg != 0 {
util.WriteUint32(db.mod, pAgg, handle)
}
return fn, handle
}
func callbackArgs(db *Conn, arg []Value, pArg uint32) {
for i := range arg {
arg[i] = Value{
c: db,
handle: util.ReadUint32(db.mod, pArg+ptrlen*uint32(i)),
}
}
}
var funcArgsPool sync.Pool
func putFuncArgs(p *[_MAX_FUNCTION_ARG]Value) {
funcArgsPool.Put(p)
}
func getFuncArgs() *[_MAX_FUNCTION_ARG]Value {
if p := funcArgsPool.Get(); p == nil {
return new([_MAX_FUNCTION_ARG]Value)
} else {
return p.(*[_MAX_FUNCTION_ARG]Value)
}
}

6
vendor/github.com/ncruces/go-sqlite3/go.work generated vendored Normal file
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go 1.21
use (
.
./gormlite
)

9
vendor/github.com/ncruces/go-sqlite3/go.work.sum generated vendored Normal file
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@ -0,0 +1,9 @@
golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
golang.org/x/term v0.19.0 h1:+ThwsDv+tYfnJFhF4L8jITxu1tdTWRTZpdsWgEgjL6Q=
golang.org/x/term v0.19.0/go.mod h1:2CuTdWZ7KHSQwUzKva0cbMg6q2DMI3Mmxp+gKJbskEk=
golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=

9
vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_other.go generated vendored Normal file
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//go:build !(unix || windows) || sqlite3_nosys
package util
import "github.com/tetratelabs/wazero/experimental"
func virtualAlloc(cap, max uint64) experimental.LinearMemory {
return sliceAlloc(cap, max)
}

25
vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_slice.go generated vendored Normal file
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//go:build !(darwin || linux) || !(amd64 || arm64 || riscv64) || sqlite3_noshm || sqlite3_nosys
package util
import "github.com/tetratelabs/wazero/experimental"
func sliceAlloc(cap, max uint64) experimental.LinearMemory {
return &sliceBuffer{make([]byte, cap), max}
}
type sliceBuffer struct {
buf []byte
max uint64
}
func (b *sliceBuffer) Free() {}
func (b *sliceBuffer) Reallocate(size uint64) []byte {
if cap := uint64(cap(b.buf)); size > cap {
b.buf = append(b.buf[:cap], make([]byte, size-cap)...)
} else {
b.buf = b.buf[:size]
}
return b.buf
}

67
vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_unix.go generated vendored Normal file
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//go:build unix && !sqlite3_nosys
package util
import (
"math"
"github.com/tetratelabs/wazero/experimental"
"golang.org/x/sys/unix"
)
func virtualAlloc(cap, max uint64) experimental.LinearMemory {
// Round up to the page size.
rnd := uint64(unix.Getpagesize() - 1)
max = (max + rnd) &^ rnd
if max > math.MaxInt {
// This ensures int(max) overflows to a negative value,
// and unix.Mmap returns EINVAL.
max = math.MaxUint64
}
// Reserve max bytes of address space, to ensure we won't need to move it.
// A protected, private, anonymous mapping should not commit memory.
b, err := unix.Mmap(-1, 0, int(max), unix.PROT_NONE, unix.MAP_PRIVATE|unix.MAP_ANON)
if err != nil {
panic(err)
}
return &mmappedMemory{buf: b[:0]}
}
// The slice covers the entire mmapped memory:
// - len(buf) is the already committed memory,
// - cap(buf) is the reserved address space.
type mmappedMemory struct {
buf []byte
}
func (m *mmappedMemory) Reallocate(size uint64) []byte {
com := uint64(len(m.buf))
res := uint64(cap(m.buf))
if com < size && size < res {
// Round up to the page size.
rnd := uint64(unix.Getpagesize() - 1)
new := (size + rnd) &^ rnd
// Commit additional memory up to new bytes.
err := unix.Mprotect(m.buf[com:new], unix.PROT_READ|unix.PROT_WRITE)
if err != nil {
panic(err)
}
// Update committed memory.
m.buf = m.buf[:new]
}
// Limit returned capacity because bytes beyond
// len(m.buf) have not yet been committed.
return m.buf[:size:len(m.buf)]
}
func (m *mmappedMemory) Free() {
err := unix.Munmap(m.buf[:cap(m.buf)])
if err != nil {
panic(err)
}
m.buf = nil
}

76
vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_windows.go generated vendored Normal file
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//go:build !sqlite3_nosys
package util
import (
"math"
"reflect"
"unsafe"
"github.com/tetratelabs/wazero/experimental"
"golang.org/x/sys/windows"
)
func virtualAlloc(cap, max uint64) experimental.LinearMemory {
// Round up to the page size.
rnd := uint64(windows.Getpagesize() - 1)
max = (max + rnd) &^ rnd
if max > math.MaxInt {
// This ensures uintptr(max) overflows to a large value,
// and windows.VirtualAlloc returns an error.
max = math.MaxUint64
}
// Reserve max bytes of address space, to ensure we won't need to move it.
// This does not commit memory.
r, err := windows.VirtualAlloc(0, uintptr(max), windows.MEM_RESERVE, windows.PAGE_READWRITE)
if err != nil {
panic(err)
}
mem := virtualMemory{addr: r}
// SliceHeader, although deprecated, avoids a go vet warning.
sh := (*reflect.SliceHeader)(unsafe.Pointer(&mem.buf))
sh.Cap = int(max) // Not a bug.
sh.Data = r
return &mem
}
// The slice covers the entire mmapped memory:
// - len(buf) is the already committed memory,
// - cap(buf) is the reserved address space.
type virtualMemory struct {
buf []byte
addr uintptr
}
func (m *virtualMemory) Reallocate(size uint64) []byte {
com := uint64(len(m.buf))
res := uint64(cap(m.buf))
if com < size && size < res {
// Round up to the page size.
rnd := uint64(windows.Getpagesize() - 1)
new := (size + rnd) &^ rnd
// Commit additional memory up to new bytes.
_, err := windows.VirtualAlloc(m.addr, uintptr(new), windows.MEM_COMMIT, windows.PAGE_READWRITE)
if err != nil {
panic(err)
}
// Update committed memory.
m.buf = m.buf[:new]
}
// Limit returned capacity because bytes beyond
// len(m.buf) have not yet been committed.
return m.buf[:size:len(m.buf)]
}
func (m *virtualMemory) Free() {
err := windows.VirtualFree(m.addr, 0, windows.MEM_RELEASE)
if err != nil {
panic(err)
}
m.addr = 0
}

22
vendor/github.com/ncruces/go-sqlite3/internal/util/bool.go generated vendored Normal file
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package util
import "strings"
func ParseBool(s string) (b, ok bool) {
if len(s) == 0 {
return false, false
}
if s[0] == '0' {
return false, true
}
if '1' <= s[0] && s[0] <= '9' {
return true, true
}
switch strings.ToLower(s) {
case "true", "yes", "on":
return true, true
case "false", "no", "off":
return false, true
}
return false, false
}

117
vendor/github.com/ncruces/go-sqlite3/internal/util/const.go generated vendored Normal file
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package util
// https://sqlite.com/matrix/rescode.html
const (
OK = 0 /* Successful result */
ERROR = 1 /* Generic error */
INTERNAL = 2 /* Internal logic error in SQLite */
PERM = 3 /* Access permission denied */
ABORT = 4 /* Callback routine requested an abort */
BUSY = 5 /* The database file is locked */
LOCKED = 6 /* A table in the database is locked */
NOMEM = 7 /* A malloc() failed */
READONLY = 8 /* Attempt to write a readonly database */
INTERRUPT = 9 /* Operation terminated by sqlite3_interrupt() */
IOERR = 10 /* Some kind of disk I/O error occurred */
CORRUPT = 11 /* The database disk image is malformed */
NOTFOUND = 12 /* Unknown opcode in sqlite3_file_control() */
FULL = 13 /* Insertion failed because database is full */
CANTOPEN = 14 /* Unable to open the database file */
PROTOCOL = 15 /* Database lock protocol error */
EMPTY = 16 /* Internal use only */
SCHEMA = 17 /* The database schema changed */
TOOBIG = 18 /* String or BLOB exceeds size limit */
CONSTRAINT = 19 /* Abort due to constraint violation */
MISMATCH = 20 /* Data type mismatch */
MISUSE = 21 /* Library used incorrectly */
NOLFS = 22 /* Uses OS features not supported on host */
AUTH = 23 /* Authorization denied */
FORMAT = 24 /* Not used */
RANGE = 25 /* 2nd parameter to sqlite3_bind out of range */
NOTADB = 26 /* File opened that is not a database file */
NOTICE = 27 /* Notifications from sqlite3_log() */
WARNING = 28 /* Warnings from sqlite3_log() */
ROW = 100 /* sqlite3_step() has another row ready */
DONE = 101 /* sqlite3_step() has finished executing */
ERROR_MISSING_COLLSEQ = ERROR | (1 << 8)
ERROR_RETRY = ERROR | (2 << 8)
ERROR_SNAPSHOT = ERROR | (3 << 8)
IOERR_READ = IOERR | (1 << 8)
IOERR_SHORT_READ = IOERR | (2 << 8)
IOERR_WRITE = IOERR | (3 << 8)
IOERR_FSYNC = IOERR | (4 << 8)
IOERR_DIR_FSYNC = IOERR | (5 << 8)
IOERR_TRUNCATE = IOERR | (6 << 8)
IOERR_FSTAT = IOERR | (7 << 8)
IOERR_UNLOCK = IOERR | (8 << 8)
IOERR_RDLOCK = IOERR | (9 << 8)
IOERR_DELETE = IOERR | (10 << 8)
IOERR_BLOCKED = IOERR | (11 << 8)
IOERR_NOMEM = IOERR | (12 << 8)
IOERR_ACCESS = IOERR | (13 << 8)
IOERR_CHECKRESERVEDLOCK = IOERR | (14 << 8)
IOERR_LOCK = IOERR | (15 << 8)
IOERR_CLOSE = IOERR | (16 << 8)
IOERR_DIR_CLOSE = IOERR | (17 << 8)
IOERR_SHMOPEN = IOERR | (18 << 8)
IOERR_SHMSIZE = IOERR | (19 << 8)
IOERR_SHMLOCK = IOERR | (20 << 8)
IOERR_SHMMAP = IOERR | (21 << 8)
IOERR_SEEK = IOERR | (22 << 8)
IOERR_DELETE_NOENT = IOERR | (23 << 8)
IOERR_MMAP = IOERR | (24 << 8)
IOERR_GETTEMPPATH = IOERR | (25 << 8)
IOERR_CONVPATH = IOERR | (26 << 8)
IOERR_VNODE = IOERR | (27 << 8)
IOERR_AUTH = IOERR | (28 << 8)
IOERR_BEGIN_ATOMIC = IOERR | (29 << 8)
IOERR_COMMIT_ATOMIC = IOERR | (30 << 8)
IOERR_ROLLBACK_ATOMIC = IOERR | (31 << 8)
IOERR_DATA = IOERR | (32 << 8)
IOERR_CORRUPTFS = IOERR | (33 << 8)
IOERR_IN_PAGE = IOERR | (34 << 8)
LOCKED_SHAREDCACHE = LOCKED | (1 << 8)
LOCKED_VTAB = LOCKED | (2 << 8)
BUSY_RECOVERY = BUSY | (1 << 8)
BUSY_SNAPSHOT = BUSY | (2 << 8)
BUSY_TIMEOUT = BUSY | (3 << 8)
CANTOPEN_NOTEMPDIR = CANTOPEN | (1 << 8)
CANTOPEN_ISDIR = CANTOPEN | (2 << 8)
CANTOPEN_FULLPATH = CANTOPEN | (3 << 8)
CANTOPEN_CONVPATH = CANTOPEN | (4 << 8)
CANTOPEN_DIRTYWAL = CANTOPEN | (5 << 8) /* Not Used */
CANTOPEN_SYMLINK = CANTOPEN | (6 << 8)
CORRUPT_VTAB = CORRUPT | (1 << 8)
CORRUPT_SEQUENCE = CORRUPT | (2 << 8)
CORRUPT_INDEX = CORRUPT | (3 << 8)
READONLY_RECOVERY = READONLY | (1 << 8)
READONLY_CANTLOCK = READONLY | (2 << 8)
READONLY_ROLLBACK = READONLY | (3 << 8)
READONLY_DBMOVED = READONLY | (4 << 8)
READONLY_CANTINIT = READONLY | (5 << 8)
READONLY_DIRECTORY = READONLY | (6 << 8)
ABORT_ROLLBACK = ABORT | (2 << 8)
CONSTRAINT_CHECK = CONSTRAINT | (1 << 8)
CONSTRAINT_COMMITHOOK = CONSTRAINT | (2 << 8)
CONSTRAINT_FOREIGNKEY = CONSTRAINT | (3 << 8)
CONSTRAINT_FUNCTION = CONSTRAINT | (4 << 8)
CONSTRAINT_NOTNULL = CONSTRAINT | (5 << 8)
CONSTRAINT_PRIMARYKEY = CONSTRAINT | (6 << 8)
CONSTRAINT_TRIGGER = CONSTRAINT | (7 << 8)
CONSTRAINT_UNIQUE = CONSTRAINT | (8 << 8)
CONSTRAINT_VTAB = CONSTRAINT | (9 << 8)
CONSTRAINT_ROWID = CONSTRAINT | (10 << 8)
CONSTRAINT_PINNED = CONSTRAINT | (11 << 8)
CONSTRAINT_DATATYPE = CONSTRAINT | (12 << 8)
NOTICE_RECOVER_WAL = NOTICE | (1 << 8)
NOTICE_RECOVER_ROLLBACK = NOTICE | (2 << 8)
NOTICE_RBU = NOTICE | (3 << 8)
WARNING_AUTOINDEX = WARNING | (1 << 8)
AUTH_USER = AUTH | (1 << 8)
OK_LOAD_PERMANENTLY = OK | (1 << 8)
OK_SYMLINK = OK | (2 << 8) /* internal use only */
)

106
vendor/github.com/ncruces/go-sqlite3/internal/util/error.go generated vendored Normal file
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package util
import (
"runtime"
"strconv"
)
type ErrorString string
func (e ErrorString) Error() string { return string(e) }
const (
NilErr = ErrorString("sqlite3: invalid memory address or null pointer dereference")
OOMErr = ErrorString("sqlite3: out of memory")
RangeErr = ErrorString("sqlite3: index out of range")
NoNulErr = ErrorString("sqlite3: missing NUL terminator")
NoBinaryErr = ErrorString("sqlite3: no SQLite binary embed/set/loaded")
BadBinaryErr = ErrorString("sqlite3: invalid SQLite binary embed/set/loaded")
TimeErr = ErrorString("sqlite3: invalid time value")
WhenceErr = ErrorString("sqlite3: invalid whence")
OffsetErr = ErrorString("sqlite3: invalid offset")
TailErr = ErrorString("sqlite3: multiple statements")
IsolationErr = ErrorString("sqlite3: unsupported isolation level")
ValueErr = ErrorString("sqlite3: unsupported value")
NoVFSErr = ErrorString("sqlite3: no such vfs: ")
)
func AssertErr() ErrorString {
msg := "sqlite3: assertion failed"
if _, file, line, ok := runtime.Caller(1); ok {
msg += " (" + file + ":" + strconv.Itoa(line) + ")"
}
return ErrorString(msg)
}
func ErrorCodeString(rc uint32) string {
switch rc {
case ABORT_ROLLBACK:
return "sqlite3: abort due to ROLLBACK"
case ROW:
return "sqlite3: another row available"
case DONE:
return "sqlite3: no more rows available"
}
switch rc & 0xff {
case OK:
return "sqlite3: not an error"
case ERROR:
return "sqlite3: SQL logic error"
case INTERNAL:
break
case PERM:
return "sqlite3: access permission denied"
case ABORT:
return "sqlite3: query aborted"
case BUSY:
return "sqlite3: database is locked"
case LOCKED:
return "sqlite3: database table is locked"
case NOMEM:
return "sqlite3: out of memory"
case READONLY:
return "sqlite3: attempt to write a readonly database"
case INTERRUPT:
return "sqlite3: interrupted"
case IOERR:
return "sqlite3: disk I/O error"
case CORRUPT:
return "sqlite3: database disk image is malformed"
case NOTFOUND:
return "sqlite3: unknown operation"
case FULL:
return "sqlite3: database or disk is full"
case CANTOPEN:
return "sqlite3: unable to open database file"
case PROTOCOL:
return "sqlite3: locking protocol"
case FORMAT:
break
case SCHEMA:
return "sqlite3: database schema has changed"
case TOOBIG:
return "sqlite3: string or blob too big"
case CONSTRAINT:
return "sqlite3: constraint failed"
case MISMATCH:
return "sqlite3: datatype mismatch"
case MISUSE:
return "sqlite3: bad parameter or other API misuse"
case NOLFS:
break
case AUTH:
return "sqlite3: authorization denied"
case EMPTY:
break
case RANGE:
return "sqlite3: column index out of range"
case NOTADB:
return "sqlite3: file is not a database"
case NOTICE:
return "sqlite3: notification message"
case WARNING:
return "sqlite3: warning message"
}
return "sqlite3: unknown error"
}

193
vendor/github.com/ncruces/go-sqlite3/internal/util/func.go generated vendored Normal file
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@ -0,0 +1,193 @@
package util
import (
"context"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/api"
)
type i32 interface{ ~int32 | ~uint32 }
type i64 interface{ ~int64 | ~uint64 }
type funcVI[T0 i32] func(context.Context, api.Module, T0)
func (fn funcVI[T0]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]))
}
func ExportFuncVI[T0 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVI[T0](fn),
[]api.ValueType{api.ValueTypeI32}, nil).
Export(name)
}
type funcVII[T0, T1 i32] func(context.Context, api.Module, T0, T1)
func (fn funcVII[T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]), T1(stack[1]))
}
func ExportFuncVII[T0, T1 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVII[T0, T1](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32}, nil).
Export(name)
}
type funcVIII[T0, T1, T2 i32] func(context.Context, api.Module, T0, T1, T2)
func (fn funcVIII[T0, T1, T2]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]))
}
func ExportFuncVIII[T0, T1, T2 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVIII[T0, T1, T2](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
Export(name)
}
type funcVIIII[T0, T1, T2, T3 i32] func(context.Context, api.Module, T0, T1, T2, T3)
func (fn funcVIIII[T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]))
}
func ExportFuncVIIII[T0, T1, T2, T3 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVIIII[T0, T1, T2, T3](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
Export(name)
}
type funcVIIIII[T0, T1, T2, T3, T4 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4)
func (fn funcVIIIII[T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]))
}
func ExportFuncVIIIII[T0, T1, T2, T3, T4 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVIIIII[T0, T1, T2, T3, T4](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
Export(name)
}
type funcVIIIIJ[T0, T1, T2, T3 i32, T4 i64] func(context.Context, api.Module, T0, T1, T2, T3, T4)
func (fn funcVIIIIJ[T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]))
}
func ExportFuncVIIIIJ[T0, T1, T2, T3 i32, T4 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4)) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcVIIIIJ[T0, T1, T2, T3, T4](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI64}, nil).
Export(name)
}
type funcII[TR, T0 i32] func(context.Context, api.Module, T0) TR
func (fn funcII[TR, T0]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0])))
}
func ExportFuncII[TR, T0 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcII[TR, T0](fn),
[]api.ValueType{api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIII[TR, T0, T1 i32] func(context.Context, api.Module, T0, T1) TR
func (fn funcIII[TR, T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1])))
}
func ExportFuncIII[TR, T0, T1 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIII[TR, T0, T1](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIII[TR, T0, T1, T2 i32] func(context.Context, api.Module, T0, T1, T2) TR
func (fn funcIIII[TR, T0, T1, T2]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2])))
}
func ExportFuncIIII[TR, T0, T1, T2 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIII[TR, T0, T1, T2](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIIII[TR, T0, T1, T2, T3 i32] func(context.Context, api.Module, T0, T1, T2, T3) TR
func (fn funcIIIII[TR, T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3])))
}
func ExportFuncIIIII[TR, T0, T1, T2, T3 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIIII[TR, T0, T1, T2, T3](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIIIII[TR, T0, T1, T2, T3, T4 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4) TR
func (fn funcIIIIII[TR, T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4])))
}
func ExportFuncIIIIII[TR, T0, T1, T2, T3, T4 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIIIII[TR, T0, T1, T2, T3, T4](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIIIIII[TR, T0, T1, T2, T3, T4, T5 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4, T5) TR
func (fn funcIIIIIII[TR, T0, T1, T2, T3, T4, T5]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]), T5(stack[5])))
}
func ExportFuncIIIIIII[TR, T0, T1, T2, T3, T4, T5 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4, T5) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIIIIII[TR, T0, T1, T2, T3, T4, T5](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIIIJ[TR, T0, T1, T2 i32, T3 i64] func(context.Context, api.Module, T0, T1, T2, T3) TR
func (fn funcIIIIJ[TR, T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3])))
}
func ExportFuncIIIIJ[TR, T0, T1, T2 i32, T3 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIIIJ[TR, T0, T1, T2, T3](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI64}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}
type funcIIJ[TR, T0 i32, T1 i64] func(context.Context, api.Module, T0, T1) TR
func (fn funcIIJ[TR, T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1])))
}
func ExportFuncIIJ[TR, T0 i32, T1 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1) TR) {
mod.NewFunctionBuilder().
WithGoModuleFunction(funcIIJ[TR, T0, T1](fn),
[]api.ValueType{api.ValueTypeI32, api.ValueTypeI64}, []api.ValueType{api.ValueTypeI32}).
Export(name)
}

65
vendor/github.com/ncruces/go-sqlite3/internal/util/handle.go generated vendored Normal file
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package util
import (
"context"
"io"
)
type handleState struct {
handles []any
holes int
}
func (s *handleState) CloseNotify(ctx context.Context, exitCode uint32) {
for _, h := range s.handles {
if c, ok := h.(io.Closer); ok {
c.Close()
}
}
s.handles = nil
s.holes = 0
}
func GetHandle(ctx context.Context, id uint32) any {
if id == 0 {
return nil
}
s := ctx.Value(moduleKey{}).(*moduleState)
return s.handles[^id]
}
func DelHandle(ctx context.Context, id uint32) error {
if id == 0 {
return nil
}
s := ctx.Value(moduleKey{}).(*moduleState)
a := s.handles[^id]
s.handles[^id] = nil
s.holes++
if c, ok := a.(io.Closer); ok {
return c.Close()
}
return nil
}
func AddHandle(ctx context.Context, a any) (id uint32) {
if a == nil {
panic(NilErr)
}
s := ctx.Value(moduleKey{}).(*moduleState)
// Find an empty slot.
if s.holes > cap(s.handles)-len(s.handles) {
for id, h := range s.handles {
if h == nil {
s.holes--
s.handles[id] = a
return ^uint32(id)
}
}
}
// Add a new slot.
s.handles = append(s.handles, a)
return -uint32(len(s.handles))
}

35
vendor/github.com/ncruces/go-sqlite3/internal/util/json.go generated vendored Normal file
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@ -0,0 +1,35 @@
package util
import (
"encoding/json"
"strconv"
"time"
"unsafe"
)
type JSON struct{ Value any }
func (j JSON) Scan(value any) error {
var buf []byte
switch v := value.(type) {
case []byte:
buf = v
case string:
buf = unsafe.Slice(unsafe.StringData(v), len(v))
case int64:
buf = strconv.AppendInt(nil, v, 10)
case float64:
buf = strconv.AppendFloat(nil, v, 'g', -1, 64)
case time.Time:
buf = append(buf, '"')
buf = v.AppendFormat(buf, time.RFC3339Nano)
buf = append(buf, '"')
case nil:
buf = append(buf, "null"...)
default:
panic(AssertErr())
}
return json.Unmarshal(buf, j.Value)
}

134
vendor/github.com/ncruces/go-sqlite3/internal/util/mem.go generated vendored Normal file
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@ -0,0 +1,134 @@
package util
import (
"bytes"
"math"
"github.com/tetratelabs/wazero/api"
)
func View(mod api.Module, ptr uint32, size uint64) []byte {
if ptr == 0 {
panic(NilErr)
}
if size > math.MaxUint32 {
panic(RangeErr)
}
if size == 0 {
return nil
}
buf, ok := mod.Memory().Read(ptr, uint32(size))
if !ok {
panic(RangeErr)
}
return buf
}
func ReadUint8(mod api.Module, ptr uint32) uint8 {
if ptr == 0 {
panic(NilErr)
}
v, ok := mod.Memory().ReadByte(ptr)
if !ok {
panic(RangeErr)
}
return v
}
func ReadUint32(mod api.Module, ptr uint32) uint32 {
if ptr == 0 {
panic(NilErr)
}
v, ok := mod.Memory().ReadUint32Le(ptr)
if !ok {
panic(RangeErr)
}
return v
}
func WriteUint8(mod api.Module, ptr uint32, v uint8) {
if ptr == 0 {
panic(NilErr)
}
ok := mod.Memory().WriteByte(ptr, v)
if !ok {
panic(RangeErr)
}
}
func WriteUint32(mod api.Module, ptr uint32, v uint32) {
if ptr == 0 {
panic(NilErr)
}
ok := mod.Memory().WriteUint32Le(ptr, v)
if !ok {
panic(RangeErr)
}
}
func ReadUint64(mod api.Module, ptr uint32) uint64 {
if ptr == 0 {
panic(NilErr)
}
v, ok := mod.Memory().ReadUint64Le(ptr)
if !ok {
panic(RangeErr)
}
return v
}
func WriteUint64(mod api.Module, ptr uint32, v uint64) {
if ptr == 0 {
panic(NilErr)
}
ok := mod.Memory().WriteUint64Le(ptr, v)
if !ok {
panic(RangeErr)
}
}
func ReadFloat64(mod api.Module, ptr uint32) float64 {
return math.Float64frombits(ReadUint64(mod, ptr))
}
func WriteFloat64(mod api.Module, ptr uint32, v float64) {
WriteUint64(mod, ptr, math.Float64bits(v))
}
func ReadString(mod api.Module, ptr, maxlen uint32) string {
if ptr == 0 {
panic(NilErr)
}
switch maxlen {
case 0:
return ""
case math.MaxUint32:
// avoid overflow
default:
maxlen = maxlen + 1
}
mem := mod.Memory()
buf, ok := mem.Read(ptr, maxlen)
if !ok {
buf, ok = mem.Read(ptr, mem.Size()-ptr)
if !ok {
panic(RangeErr)
}
}
if i := bytes.IndexByte(buf, 0); i < 0 {
panic(NoNulErr)
} else {
return string(buf[:i])
}
}
func WriteBytes(mod api.Module, ptr uint32, b []byte) {
buf := View(mod, ptr, uint64(len(b)))
copy(buf, b)
}
func WriteString(mod api.Module, ptr uint32, s string) {
buf := View(mod, ptr, uint64(len(s)+1))
buf[len(s)] = 0
copy(buf, s)
}

97
vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go generated vendored Normal file
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//go:build (darwin || linux) && (amd64 || arm64 || riscv64) && !(sqlite3_noshm || sqlite3_nosys)
package util
import (
"context"
"os"
"unsafe"
"github.com/tetratelabs/wazero/api"
"github.com/tetratelabs/wazero/experimental"
"golang.org/x/sys/unix"
)
func withAllocator(ctx context.Context) context.Context {
return experimental.WithMemoryAllocator(ctx,
experimental.MemoryAllocatorFunc(virtualAlloc))
}
type mmapState struct {
regions []*MappedRegion
}
func (s *mmapState) new(ctx context.Context, mod api.Module, size int32) *MappedRegion {
// Find unused region.
for _, r := range s.regions {
if !r.used && r.size == size {
return r
}
}
// Allocate page aligned memmory.
alloc := mod.ExportedFunction("aligned_alloc")
stack := [2]uint64{
uint64(unix.Getpagesize()),
uint64(size),
}
if err := alloc.CallWithStack(ctx, stack[:]); err != nil {
panic(err)
}
if stack[0] == 0 {
panic(OOMErr)
}
// Save the newly allocated region.
ptr := uint32(stack[0])
buf := View(mod, ptr, uint64(size))
addr := uintptr(unsafe.Pointer(&buf[0]))
s.regions = append(s.regions, &MappedRegion{
Ptr: ptr,
addr: addr,
size: size,
})
return s.regions[len(s.regions)-1]
}
type MappedRegion struct {
addr uintptr
Ptr uint32
size int32
used bool
}
func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32, prot int) (*MappedRegion, error) {
s := ctx.Value(moduleKey{}).(*moduleState)
r := s.new(ctx, mod, size)
err := r.mmap(f, offset, prot)
if err != nil {
return nil, err
}
return r, nil
}
func (r *MappedRegion) Unmap() error {
// We can't munmap the region, otherwise it could be remaped.
// Instead, convert it to a protected, private, anonymous mapping.
// If successful, it can be reused for a subsequent mmap.
_, err := mmap(r.addr, uintptr(r.size),
unix.PROT_NONE, unix.MAP_PRIVATE|unix.MAP_ANON|unix.MAP_FIXED,
-1, 0)
r.used = err != nil
return err
}
func (r *MappedRegion) mmap(f *os.File, offset int64, prot int) error {
_, err := mmap(r.addr, uintptr(r.size),
prot, unix.MAP_SHARED|unix.MAP_FIXED,
int(f.Fd()), offset)
r.used = err == nil
return err
}
// We need the low level mmap for MAP_FIXED to work.
// Bind the syscall version hoping that it is more stable.
//go:linkname mmap syscall.mmap
func mmap(addr, length uintptr, prot, flag, fd int, pos int64) (*byte, error)

21
vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go generated vendored Normal file
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@ -0,0 +1,21 @@
//go:build !(darwin || linux) || !(amd64 || arm64 || riscv64) || sqlite3_noshm || sqlite3_nosys
package util
import (
"context"
"github.com/tetratelabs/wazero/experimental"
)
type mmapState struct{}
func withAllocator(ctx context.Context) context.Context {
return experimental.WithMemoryAllocator(ctx,
experimental.MemoryAllocatorFunc(func(cap, max uint64) experimental.LinearMemory {
if cap == max {
return virtualAlloc(cap, max)
}
return sliceAlloc(cap, max)
}))
}

21
vendor/github.com/ncruces/go-sqlite3/internal/util/module.go generated vendored Normal file
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@ -0,0 +1,21 @@
package util
import (
"context"
"github.com/tetratelabs/wazero/experimental"
)
type moduleKey struct{}
type moduleState struct {
mmapState
handleState
}
func NewContext(ctx context.Context) context.Context {
state := new(moduleState)
ctx = withAllocator(ctx)
ctx = experimental.WithCloseNotifier(ctx, state)
ctx = context.WithValue(ctx, moduleKey{}, state)
return ctx
}

11
vendor/github.com/ncruces/go-sqlite3/internal/util/pointer.go generated vendored Normal file
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@ -0,0 +1,11 @@
package util
type Pointer[T any] struct{ Value T }
func (p Pointer[T]) unwrap() any { return p.Value }
type PointerUnwrap interface{ unwrap() any }
func UnwrapPointer(p PointerUnwrap) any {
return p.unwrap()
}

10
vendor/github.com/ncruces/go-sqlite3/internal/util/reflect.go generated vendored Normal file
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@ -0,0 +1,10 @@
package util
import "reflect"
func ReflectType(v reflect.Value) reflect.Type {
if v.Kind() != reflect.Invalid {
return v.Type()
}
return nil
}

11
vendor/github.com/ncruces/go-sqlite3/json.go generated vendored Normal file
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@ -0,0 +1,11 @@
package sqlite3
import "github.com/ncruces/go-sqlite3/internal/util"
// JSON returns a value that can be used as an argument to
// [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
// store value as JSON, or decode JSON into value.
// JSON should NOT be used with [BindJSON] or [ResultJSON].
func JSON(value any) any {
return util.JSON{Value: value}
}

12
vendor/github.com/ncruces/go-sqlite3/pointer.go generated vendored Normal file
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@ -0,0 +1,12 @@
package sqlite3
import "github.com/ncruces/go-sqlite3/internal/util"
// Pointer returns a pointer to a value that can be used as an argument to
// [database/sql.DB.Exec] and similar methods.
// Pointer should NOT be used with [BindPointer] or [ResultPointer].
//
// https://sqlite.org/bindptr.html
func Pointer[T any](value T) any {
return util.Pointer[T]{Value: value}
}

112
vendor/github.com/ncruces/go-sqlite3/quote.go generated vendored Normal file
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@ -0,0 +1,112 @@
package sqlite3
import (
"bytes"
"math"
"strconv"
"strings"
"time"
"unsafe"
"github.com/ncruces/go-sqlite3/internal/util"
)
// Quote escapes and quotes a value
// making it safe to embed in SQL text.
func Quote(value any) string {
switch v := value.(type) {
case nil:
return "NULL"
case bool:
if v {
return "1"
} else {
return "0"
}
case int:
return strconv.Itoa(v)
case int64:
return strconv.FormatInt(v, 10)
case float64:
switch {
case math.IsNaN(v):
return "NULL"
case math.IsInf(v, 1):
return "9.0e999"
case math.IsInf(v, -1):
return "-9.0e999"
}
return strconv.FormatFloat(v, 'g', -1, 64)
case time.Time:
return "'" + v.Format(time.RFC3339Nano) + "'"
case string:
if strings.IndexByte(v, 0) >= 0 {
break
}
buf := make([]byte, 2+len(v)+strings.Count(v, "'"))
buf[0] = '\''
i := 1
for _, b := range []byte(v) {
if b == '\'' {
buf[i] = b
i += 1
}
buf[i] = b
i += 1
}
buf[i] = '\''
return unsafe.String(&buf[0], len(buf))
case []byte:
buf := make([]byte, 3+2*len(v))
buf[0] = 'x'
buf[1] = '\''
i := 2
for _, b := range v {
const hex = "0123456789ABCDEF"
buf[i+0] = hex[b/16]
buf[i+1] = hex[b%16]
i += 2
}
buf[i] = '\''
return unsafe.String(&buf[0], len(buf))
case ZeroBlob:
if v > ZeroBlob(1e9-3)/2 {
break
}
buf := bytes.Repeat([]byte("0"), int(3+2*int64(v)))
buf[0] = 'x'
buf[1] = '\''
buf[len(buf)-1] = '\''
return unsafe.String(&buf[0], len(buf))
}
panic(util.ValueErr)
}
// QuoteIdentifier escapes and quotes an identifier
// making it safe to embed in SQL text.
func QuoteIdentifier(id string) string {
if strings.IndexByte(id, 0) >= 0 {
panic(util.ValueErr)
}
buf := make([]byte, 2+len(id)+strings.Count(id, `"`))
buf[0] = '"'
i := 1
for _, b := range []byte(id) {
if b == '"' {
buf[i] = b
i += 1
}
buf[i] = b
i += 1
}
buf[i] = '"'
return unsafe.String(&buf[0], len(buf))
}

341
vendor/github.com/ncruces/go-sqlite3/sqlite.go generated vendored Normal file
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// Package sqlite3 wraps the C SQLite API.
package sqlite3
import (
"context"
"math"
"math/bits"
"os"
"sync"
"unsafe"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/ncruces/go-sqlite3/vfs"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/api"
)
// Configure SQLite Wasm.
//
// Importing package embed initializes [Binary]
// with an appropriate build of SQLite:
//
// import _ "github.com/ncruces/go-sqlite3/embed"
var (
Binary []byte // Wasm binary to load.
Path string // Path to load the binary from.
RuntimeConfig wazero.RuntimeConfig
)
// Initialize decodes and compiles the SQLite Wasm binary.
// This is called implicitly when the first connection is openned,
// but is potentially slow, so you may want to call it at a more convenient time.
func Initialize() error {
instance.once.Do(compileSQLite)
return instance.err
}
var instance struct {
runtime wazero.Runtime
compiled wazero.CompiledModule
err error
once sync.Once
}
func compileSQLite() {
if RuntimeConfig == nil {
RuntimeConfig = wazero.NewRuntimeConfig()
}
ctx := context.Background()
instance.runtime = wazero.NewRuntimeWithConfig(ctx, RuntimeConfig)
env := instance.runtime.NewHostModuleBuilder("env")
env = vfs.ExportHostFunctions(env)
env = exportCallbacks(env)
_, instance.err = env.Instantiate(ctx)
if instance.err != nil {
return
}
bin := Binary
if bin == nil && Path != "" {
bin, instance.err = os.ReadFile(Path)
if instance.err != nil {
return
}
}
if bin == nil {
instance.err = util.NoBinaryErr
return
}
instance.compiled, instance.err = instance.runtime.CompileModule(ctx, bin)
}
type sqlite struct {
ctx context.Context
mod api.Module
funcs struct {
fn [32]api.Function
id [32]*byte
mask uint32
}
stack [8]uint64
freer uint32
}
func instantiateSQLite() (sqlt *sqlite, err error) {
if err := Initialize(); err != nil {
return nil, err
}
sqlt = new(sqlite)
sqlt.ctx = util.NewContext(context.Background())
sqlt.mod, err = instance.runtime.InstantiateModule(sqlt.ctx,
instance.compiled, wazero.NewModuleConfig().WithName(""))
if err != nil {
return nil, err
}
global := sqlt.mod.ExportedGlobal("malloc_destructor")
if global == nil {
return nil, util.BadBinaryErr
}
sqlt.freer = util.ReadUint32(sqlt.mod, uint32(global.Get()))
if sqlt.freer == 0 {
return nil, util.BadBinaryErr
}
return sqlt, nil
}
func (sqlt *sqlite) close() error {
return sqlt.mod.Close(sqlt.ctx)
}
func (sqlt *sqlite) error(rc uint64, handle uint32, sql ...string) error {
if rc == _OK {
return nil
}
err := Error{code: rc}
if err.Code() == NOMEM || err.ExtendedCode() == IOERR_NOMEM {
panic(util.OOMErr)
}
if r := sqlt.call("sqlite3_errstr", rc); r != 0 {
err.str = util.ReadString(sqlt.mod, uint32(r), _MAX_NAME)
}
if handle != 0 {
if r := sqlt.call("sqlite3_errmsg", uint64(handle)); r != 0 {
err.msg = util.ReadString(sqlt.mod, uint32(r), _MAX_LENGTH)
}
if sql != nil {
if r := sqlt.call("sqlite3_error_offset", uint64(handle)); r != math.MaxUint32 {
err.sql = sql[0][r:]
}
}
}
switch err.msg {
case err.str, "not an error":
err.msg = ""
}
return &err
}
func (sqlt *sqlite) getfn(name string) api.Function {
c := &sqlt.funcs
p := unsafe.StringData(name)
for i := range c.id {
if c.id[i] == p {
c.id[i] = nil
c.mask &^= uint32(1) << i
return c.fn[i]
}
}
return sqlt.mod.ExportedFunction(name)
}
func (sqlt *sqlite) putfn(name string, fn api.Function) {
c := &sqlt.funcs
p := unsafe.StringData(name)
i := bits.TrailingZeros32(^c.mask)
if i < 32 {
c.id[i] = p
c.fn[i] = fn
c.mask |= uint32(1) << i
} else {
c.id[0] = p
c.fn[0] = fn
c.mask = uint32(1)
}
}
func (sqlt *sqlite) call(name string, params ...uint64) uint64 {
copy(sqlt.stack[:], params)
fn := sqlt.getfn(name)
err := fn.CallWithStack(sqlt.ctx, sqlt.stack[:])
if err != nil {
panic(err)
}
sqlt.putfn(name, fn)
return sqlt.stack[0]
}
func (sqlt *sqlite) free(ptr uint32) {
if ptr == 0 {
return
}
sqlt.call("free", uint64(ptr))
}
func (sqlt *sqlite) new(size uint64) uint32 {
if size > _MAX_ALLOCATION_SIZE {
panic(util.OOMErr)
}
ptr := uint32(sqlt.call("malloc", size))
if ptr == 0 && size != 0 {
panic(util.OOMErr)
}
return ptr
}
func (sqlt *sqlite) newBytes(b []byte) uint32 {
if (*[0]byte)(b) == nil {
return 0
}
ptr := sqlt.new(uint64(len(b)))
util.WriteBytes(sqlt.mod, ptr, b)
return ptr
}
func (sqlt *sqlite) newString(s string) uint32 {
ptr := sqlt.new(uint64(len(s) + 1))
util.WriteString(sqlt.mod, ptr, s)
return ptr
}
func (sqlt *sqlite) newArena(size uint64) arena {
// Ensure the arena's size is a multiple of 8.
size = (size + 7) &^ 7
return arena{
sqlt: sqlt,
size: uint32(size),
base: sqlt.new(size),
}
}
type arena struct {
sqlt *sqlite
ptrs []uint32
base uint32
next uint32
size uint32
}
func (a *arena) free() {
if a.sqlt == nil {
return
}
for _, ptr := range a.ptrs {
a.sqlt.free(ptr)
}
a.sqlt.free(a.base)
a.sqlt = nil
}
func (a *arena) mark() (reset func()) {
ptrs := len(a.ptrs)
next := a.next
return func() {
for _, ptr := range a.ptrs[ptrs:] {
a.sqlt.free(ptr)
}
a.ptrs = a.ptrs[:ptrs]
a.next = next
}
}
func (a *arena) new(size uint64) uint32 {
// Align the next address, to 4 or 8 bytes.
if size&7 != 0 {
a.next = (a.next + 3) &^ 3
} else {
a.next = (a.next + 7) &^ 7
}
if size <= uint64(a.size-a.next) {
ptr := a.base + a.next
a.next += uint32(size)
return ptr
}
ptr := a.sqlt.new(size)
a.ptrs = append(a.ptrs, ptr)
return ptr
}
func (a *arena) bytes(b []byte) uint32 {
if (*[0]byte)(b) == nil {
return 0
}
ptr := a.new(uint64(len(b)))
util.WriteBytes(a.sqlt.mod, ptr, b)
return ptr
}
func (a *arena) string(s string) uint32 {
ptr := a.new(uint64(len(s) + 1))
util.WriteString(a.sqlt.mod, ptr, s)
return ptr
}
func exportCallbacks(env wazero.HostModuleBuilder) wazero.HostModuleBuilder {
util.ExportFuncII(env, "go_progress_handler", progressCallback)
util.ExportFuncIIII(env, "go_busy_timeout", timeoutCallback)
util.ExportFuncIII(env, "go_busy_handler", busyCallback)
util.ExportFuncII(env, "go_commit_hook", commitCallback)
util.ExportFuncVI(env, "go_rollback_hook", rollbackCallback)
util.ExportFuncVIIIIJ(env, "go_update_hook", updateCallback)
util.ExportFuncIIIII(env, "go_wal_hook", walCallback)
util.ExportFuncIIIIII(env, "go_autovacuum_pages", autoVacuumCallback)
util.ExportFuncIIIIIII(env, "go_authorizer", authorizerCallback)
util.ExportFuncVIII(env, "go_log", logCallback)
util.ExportFuncVI(env, "go_destroy", destroyCallback)
util.ExportFuncVIIII(env, "go_func", funcCallback)
util.ExportFuncVIIIII(env, "go_step", stepCallback)
util.ExportFuncVIII(env, "go_final", finalCallback)
util.ExportFuncVII(env, "go_value", valueCallback)
util.ExportFuncVIIII(env, "go_inverse", inverseCallback)
util.ExportFuncVIIII(env, "go_collation_needed", collationCallback)
util.ExportFuncIIIIII(env, "go_compare", compareCallback)
util.ExportFuncIIIIII(env, "go_vtab_create", vtabModuleCallback(xCreate))
util.ExportFuncIIIIII(env, "go_vtab_connect", vtabModuleCallback(xConnect))
util.ExportFuncII(env, "go_vtab_disconnect", vtabDisconnectCallback)
util.ExportFuncII(env, "go_vtab_destroy", vtabDestroyCallback)
util.ExportFuncIII(env, "go_vtab_best_index", vtabBestIndexCallback)
util.ExportFuncIIIII(env, "go_vtab_update", vtabUpdateCallback)
util.ExportFuncIII(env, "go_vtab_rename", vtabRenameCallback)
util.ExportFuncIIIII(env, "go_vtab_find_function", vtabFindFuncCallback)
util.ExportFuncII(env, "go_vtab_begin", vtabBeginCallback)
util.ExportFuncII(env, "go_vtab_sync", vtabSyncCallback)
util.ExportFuncII(env, "go_vtab_commit", vtabCommitCallback)
util.ExportFuncII(env, "go_vtab_rollback", vtabRollbackCallback)
util.ExportFuncIII(env, "go_vtab_savepoint", vtabSavepointCallback)
util.ExportFuncIII(env, "go_vtab_release", vtabReleaseCallback)
util.ExportFuncIII(env, "go_vtab_rollback_to", vtabRollbackToCallback)
util.ExportFuncIIIIII(env, "go_vtab_integrity", vtabIntegrityCallback)
util.ExportFuncIII(env, "go_cur_open", cursorOpenCallback)
util.ExportFuncII(env, "go_cur_close", cursorCloseCallback)
util.ExportFuncIIIIII(env, "go_cur_filter", cursorFilterCallback)
util.ExportFuncII(env, "go_cur_next", cursorNextCallback)
util.ExportFuncII(env, "go_cur_eof", cursorEOFCallback)
util.ExportFuncIIII(env, "go_cur_column", cursorColumnCallback)
util.ExportFuncIII(env, "go_cur_rowid", cursorRowIDCallback)
return env
}

639
vendor/github.com/ncruces/go-sqlite3/stmt.go generated vendored Normal file
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@ -0,0 +1,639 @@
package sqlite3
import (
"encoding/json"
"math"
"strconv"
"time"
"github.com/ncruces/go-sqlite3/internal/util"
)
// Stmt is a prepared statement object.
//
// https://sqlite.org/c3ref/stmt.html
type Stmt struct {
c *Conn
err error
handle uint32
}
// Close destroys the prepared statement object.
//
// It is safe to close a nil, zero or closed Stmt.
//
// https://sqlite.org/c3ref/finalize.html
func (s *Stmt) Close() error {
if s == nil || s.handle == 0 {
return nil
}
r := s.c.call("sqlite3_finalize", uint64(s.handle))
s.handle = 0
return s.c.error(r)
}
// Conn returns the database connection to which the prepared statement belongs.
//
// https://sqlite.org/c3ref/db_handle.html
func (s *Stmt) Conn() *Conn {
return s.c
}
// ReadOnly returns true if and only if the statement
// makes no direct changes to the content of the database file.
//
// https://sqlite.org/c3ref/stmt_readonly.html
func (s *Stmt) ReadOnly() bool {
r := s.c.call("sqlite3_stmt_readonly", uint64(s.handle))
return r != 0
}
// Reset resets the prepared statement object.
//
// https://sqlite.org/c3ref/reset.html
func (s *Stmt) Reset() error {
r := s.c.call("sqlite3_reset", uint64(s.handle))
s.err = nil
return s.c.error(r)
}
// Busy determines if a prepared statement has been reset.
//
// https://sqlite.org/c3ref/stmt_busy.html
func (s *Stmt) Busy() bool {
r := s.c.call("sqlite3_stmt_busy", uint64(s.handle))
return r != 0
}
// Step evaluates the SQL statement.
// If the SQL statement being executed returns any data,
// then true is returned each time a new row of data is ready for processing by the caller.
// The values may be accessed using the Column access functions.
// Step is called again to retrieve the next row of data.
// If an error has occurred, Step returns false;
// call [Stmt.Err] or [Stmt.Reset] to get the error.
//
// https://sqlite.org/c3ref/step.html
func (s *Stmt) Step() bool {
s.c.checkInterrupt()
r := s.c.call("sqlite3_step", uint64(s.handle))
switch r {
case _ROW:
s.err = nil
return true
case _DONE:
s.err = nil
default:
s.err = s.c.error(r)
}
return false
}
// Err gets the last error occurred during [Stmt.Step].
// Err returns nil after [Stmt.Reset] is called.
//
// https://sqlite.org/c3ref/step.html
func (s *Stmt) Err() error {
return s.err
}
// Exec is a convenience function that repeatedly calls [Stmt.Step] until it returns false,
// then calls [Stmt.Reset] to reset the statement and get any error that occurred.
func (s *Stmt) Exec() error {
for s.Step() {
}
return s.Reset()
}
// Status monitors the performance characteristics of prepared statements.
//
// https://sqlite.org/c3ref/stmt_status.html
func (s *Stmt) Status(op StmtStatus, reset bool) int {
if op > STMTSTATUS_FILTER_HIT && op != STMTSTATUS_MEMUSED {
return 0
}
var i uint64
if reset {
i = 1
}
r := s.c.call("sqlite3_stmt_status", uint64(s.handle),
uint64(op), i)
return int(int32(r))
}
// ClearBindings resets all bindings on the prepared statement.
//
// https://sqlite.org/c3ref/clear_bindings.html
func (s *Stmt) ClearBindings() error {
r := s.c.call("sqlite3_clear_bindings", uint64(s.handle))
return s.c.error(r)
}
// BindCount returns the number of SQL parameters in the prepared statement.
//
// https://sqlite.org/c3ref/bind_parameter_count.html
func (s *Stmt) BindCount() int {
r := s.c.call("sqlite3_bind_parameter_count",
uint64(s.handle))
return int(int32(r))
}
// BindIndex returns the index of a parameter in the prepared statement
// given its name.
//
// https://sqlite.org/c3ref/bind_parameter_index.html
func (s *Stmt) BindIndex(name string) int {
defer s.c.arena.mark()()
namePtr := s.c.arena.string(name)
r := s.c.call("sqlite3_bind_parameter_index",
uint64(s.handle), uint64(namePtr))
return int(int32(r))
}
// BindName returns the name of a parameter in the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_parameter_name.html
func (s *Stmt) BindName(param int) string {
r := s.c.call("sqlite3_bind_parameter_name",
uint64(s.handle), uint64(param))
ptr := uint32(r)
if ptr == 0 {
return ""
}
return util.ReadString(s.c.mod, ptr, _MAX_NAME)
}
// BindBool binds a bool to the prepared statement.
// The leftmost SQL parameter has an index of 1.
// SQLite does not have a separate boolean storage class.
// Instead, boolean values are stored as integers 0 (false) and 1 (true).
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindBool(param int, value bool) error {
var i int64
if value {
i = 1
}
return s.BindInt64(param, i)
}
// BindInt binds an int to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindInt(param int, value int) error {
return s.BindInt64(param, int64(value))
}
// BindInt64 binds an int64 to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindInt64(param int, value int64) error {
r := s.c.call("sqlite3_bind_int64",
uint64(s.handle), uint64(param), uint64(value))
return s.c.error(r)
}
// BindFloat binds a float64 to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindFloat(param int, value float64) error {
r := s.c.call("sqlite3_bind_double",
uint64(s.handle), uint64(param), math.Float64bits(value))
return s.c.error(r)
}
// BindText binds a string to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindText(param int, value string) error {
if len(value) > _MAX_LENGTH {
return TOOBIG
}
ptr := s.c.newString(value)
r := s.c.call("sqlite3_bind_text64",
uint64(s.handle), uint64(param),
uint64(ptr), uint64(len(value)),
uint64(s.c.freer), _UTF8)
return s.c.error(r)
}
// BindRawText binds a []byte to the prepared statement as text.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindRawText(param int, value []byte) error {
if len(value) > _MAX_LENGTH {
return TOOBIG
}
ptr := s.c.newBytes(value)
r := s.c.call("sqlite3_bind_text64",
uint64(s.handle), uint64(param),
uint64(ptr), uint64(len(value)),
uint64(s.c.freer), _UTF8)
return s.c.error(r)
}
// BindBlob binds a []byte to the prepared statement.
// The leftmost SQL parameter has an index of 1.
// Binding a nil slice is the same as calling [Stmt.BindNull].
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindBlob(param int, value []byte) error {
if len(value) > _MAX_LENGTH {
return TOOBIG
}
ptr := s.c.newBytes(value)
r := s.c.call("sqlite3_bind_blob64",
uint64(s.handle), uint64(param),
uint64(ptr), uint64(len(value)),
uint64(s.c.freer))
return s.c.error(r)
}
// BindZeroBlob binds a zero-filled, length n BLOB to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindZeroBlob(param int, n int64) error {
r := s.c.call("sqlite3_bind_zeroblob64",
uint64(s.handle), uint64(param), uint64(n))
return s.c.error(r)
}
// BindNull binds a NULL to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindNull(param int) error {
r := s.c.call("sqlite3_bind_null",
uint64(s.handle), uint64(param))
return s.c.error(r)
}
// BindTime binds a [time.Time] to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindTime(param int, value time.Time, format TimeFormat) error {
if format == TimeFormatDefault {
return s.bindRFC3339Nano(param, value)
}
switch v := format.Encode(value).(type) {
case string:
s.BindText(param, v)
case int64:
s.BindInt64(param, v)
case float64:
s.BindFloat(param, v)
default:
panic(util.AssertErr())
}
return nil
}
func (s *Stmt) bindRFC3339Nano(param int, value time.Time) error {
const maxlen = uint64(len(time.RFC3339Nano)) + 5
ptr := s.c.new(maxlen)
buf := util.View(s.c.mod, ptr, maxlen)
buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
r := s.c.call("sqlite3_bind_text64",
uint64(s.handle), uint64(param),
uint64(ptr), uint64(len(buf)),
uint64(s.c.freer), _UTF8)
return s.c.error(r)
}
// BindPointer binds a NULL to the prepared statement, just like [Stmt.BindNull],
// but it also associates ptr with that NULL value such that it can be retrieved
// within an application-defined SQL function using [Value.Pointer].
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindPointer(param int, ptr any) error {
valPtr := util.AddHandle(s.c.ctx, ptr)
r := s.c.call("sqlite3_bind_pointer_go",
uint64(s.handle), uint64(param), uint64(valPtr))
return s.c.error(r)
}
// BindJSON binds the JSON encoding of value to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindJSON(param int, value any) error {
data, err := json.Marshal(value)
if err != nil {
return err
}
return s.BindRawText(param, data)
}
// BindValue binds a copy of value to the prepared statement.
// The leftmost SQL parameter has an index of 1.
//
// https://sqlite.org/c3ref/bind_blob.html
func (s *Stmt) BindValue(param int, value Value) error {
if value.c != s.c {
return MISUSE
}
r := s.c.call("sqlite3_bind_value",
uint64(s.handle), uint64(param), uint64(value.handle))
return s.c.error(r)
}
// ColumnCount returns the number of columns in a result set.
//
// https://sqlite.org/c3ref/column_count.html
func (s *Stmt) ColumnCount() int {
r := s.c.call("sqlite3_column_count",
uint64(s.handle))
return int(int32(r))
}
// ColumnName returns the name of the result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_name.html
func (s *Stmt) ColumnName(col int) string {
r := s.c.call("sqlite3_column_name",
uint64(s.handle), uint64(col))
if r == 0 {
panic(util.OOMErr)
}
return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
}
// ColumnType returns the initial [Datatype] of the result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnType(col int) Datatype {
r := s.c.call("sqlite3_column_type",
uint64(s.handle), uint64(col))
return Datatype(r)
}
// ColumnDeclType returns the declared datatype of the result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_decltype.html
func (s *Stmt) ColumnDeclType(col int) string {
r := s.c.call("sqlite3_column_decltype",
uint64(s.handle), uint64(col))
if r == 0 {
return ""
}
return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
}
// ColumnDatabaseName returns the name of the database
// that is the origin of a particular result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_database_name.html
func (s *Stmt) ColumnDatabaseName(col int) string {
r := s.c.call("sqlite3_column_database_name",
uint64(s.handle), uint64(col))
if r == 0 {
return ""
}
return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
}
// ColumnTableName returns the name of the table
// that is the origin of a particular result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_database_name.html
func (s *Stmt) ColumnTableName(col int) string {
r := s.c.call("sqlite3_column_table_name",
uint64(s.handle), uint64(col))
if r == 0 {
return ""
}
return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
}
// ColumnOriginName returns the name of the table column
// that is the origin of a particular result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_database_name.html
func (s *Stmt) ColumnOriginName(col int) string {
r := s.c.call("sqlite3_column_origin_name",
uint64(s.handle), uint64(col))
if r == 0 {
return ""
}
return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
}
// ColumnBool returns the value of the result column as a bool.
// The leftmost column of the result set has the index 0.
// SQLite does not have a separate boolean storage class.
// Instead, boolean values are retrieved as integers,
// with 0 converted to false and any other value to true.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnBool(col int) bool {
return s.ColumnInt64(col) != 0
}
// ColumnInt returns the value of the result column as an int.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnInt(col int) int {
return int(s.ColumnInt64(col))
}
// ColumnInt64 returns the value of the result column as an int64.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnInt64(col int) int64 {
r := s.c.call("sqlite3_column_int64",
uint64(s.handle), uint64(col))
return int64(r)
}
// ColumnFloat returns the value of the result column as a float64.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnFloat(col int) float64 {
r := s.c.call("sqlite3_column_double",
uint64(s.handle), uint64(col))
return math.Float64frombits(r)
}
// ColumnTime returns the value of the result column as a [time.Time].
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnTime(col int, format TimeFormat) time.Time {
var v any
switch s.ColumnType(col) {
case INTEGER:
v = s.ColumnInt64(col)
case FLOAT:
v = s.ColumnFloat(col)
case TEXT, BLOB:
v = s.ColumnText(col)
case NULL:
return time.Time{}
default:
panic(util.AssertErr())
}
t, err := format.Decode(v)
if err != nil {
s.err = err
}
return t
}
// ColumnText returns the value of the result column as a string.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnText(col int) string {
return string(s.ColumnRawText(col))
}
// ColumnBlob appends to buf and returns
// the value of the result column as a []byte.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnBlob(col int, buf []byte) []byte {
return append(buf, s.ColumnRawBlob(col)...)
}
// ColumnRawText returns the value of the result column as a []byte.
// The []byte is owned by SQLite and may be invalidated by
// subsequent calls to [Stmt] methods.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnRawText(col int) []byte {
r := s.c.call("sqlite3_column_text",
uint64(s.handle), uint64(col))
return s.columnRawBytes(col, uint32(r))
}
// ColumnRawBlob returns the value of the result column as a []byte.
// The []byte is owned by SQLite and may be invalidated by
// subsequent calls to [Stmt] methods.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnRawBlob(col int) []byte {
r := s.c.call("sqlite3_column_blob",
uint64(s.handle), uint64(col))
return s.columnRawBytes(col, uint32(r))
}
func (s *Stmt) columnRawBytes(col int, ptr uint32) []byte {
if ptr == 0 {
r := s.c.call("sqlite3_errcode", uint64(s.c.handle))
s.err = s.c.error(r)
return nil
}
r := s.c.call("sqlite3_column_bytes",
uint64(s.handle), uint64(col))
return util.View(s.c.mod, ptr, r)
}
// ColumnJSON parses the JSON-encoded value of the result column
// and stores it in the value pointed to by ptr.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnJSON(col int, ptr any) error {
var data []byte
switch s.ColumnType(col) {
case NULL:
data = append(data, "null"...)
case TEXT:
data = s.ColumnRawText(col)
case BLOB:
data = s.ColumnRawBlob(col)
case INTEGER:
data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
case FLOAT:
data = strconv.AppendFloat(nil, s.ColumnFloat(col), 'g', -1, 64)
default:
panic(util.AssertErr())
}
return json.Unmarshal(data, ptr)
}
// ColumnValue returns the unprotected value of the result column.
// The leftmost column of the result set has the index 0.
//
// https://sqlite.org/c3ref/column_blob.html
func (s *Stmt) ColumnValue(col int) Value {
r := s.c.call("sqlite3_column_value",
uint64(s.handle), uint64(col))
return Value{
c: s.c,
unprot: true,
handle: uint32(r),
}
}
// Columns populates result columns into the provided slice.
// The slice must have [Stmt.ColumnCount] length.
//
// [INTEGER] columns will be retrieved as int64 values,
// [FLOAT] as float64, [NULL] as nil,
// [TEXT] as string, and [BLOB] as []byte.
// Any []byte are owned by SQLite and may be invalidated by
// subsequent calls to [Stmt] methods.
func (s *Stmt) Columns(dest []any) error {
defer s.c.arena.mark()()
count := uint64(len(dest))
typePtr := s.c.arena.new(count)
dataPtr := s.c.arena.new(8 * count)
r := s.c.call("sqlite3_columns_go",
uint64(s.handle), count, uint64(typePtr), uint64(dataPtr))
if err := s.c.error(r); err != nil {
return err
}
types := util.View(s.c.mod, typePtr, count)
for i := range dest {
switch types[i] {
case byte(INTEGER):
dest[i] = int64(util.ReadUint64(s.c.mod, dataPtr+8*uint32(i)))
continue
case byte(FLOAT):
dest[i] = util.ReadFloat64(s.c.mod, dataPtr+8*uint32(i))
continue
case byte(NULL):
dest[i] = nil
continue
}
ptr := util.ReadUint32(s.c.mod, dataPtr+8*uint32(i)+0)
len := util.ReadUint32(s.c.mod, dataPtr+8*uint32(i)+4)
buf := util.View(s.c.mod, ptr, uint64(len))
if types[i] == byte(TEXT) {
dest[i] = string(buf)
} else {
dest[i] = buf
}
}
return nil
}

354
vendor/github.com/ncruces/go-sqlite3/time.go generated vendored Normal file
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@ -0,0 +1,354 @@
package sqlite3
import (
"math"
"strconv"
"strings"
"time"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/ncruces/julianday"
)
// TimeFormat specifies how to encode/decode time values.
//
// See the documentation for the [TimeFormatDefault] constant
// for formats recognized by SQLite.
//
// https://sqlite.org/lang_datefunc.html
type TimeFormat string
// TimeFormats recognized by SQLite to encode/decode time values.
//
// https://sqlite.org/lang_datefunc.html#time_values
const (
TimeFormatDefault TimeFormat = "" // time.RFC3339Nano
// Text formats
TimeFormat1 TimeFormat = "2006-01-02"
TimeFormat2 TimeFormat = "2006-01-02 15:04"
TimeFormat3 TimeFormat = "2006-01-02 15:04:05"
TimeFormat4 TimeFormat = "2006-01-02 15:04:05.000"
TimeFormat5 TimeFormat = "2006-01-02T15:04"
TimeFormat6 TimeFormat = "2006-01-02T15:04:05"
TimeFormat7 TimeFormat = "2006-01-02T15:04:05.000"
TimeFormat8 TimeFormat = "15:04"
TimeFormat9 TimeFormat = "15:04:05"
TimeFormat10 TimeFormat = "15:04:05.000"
TimeFormat2TZ = TimeFormat2 + "Z07:00"
TimeFormat3TZ = TimeFormat3 + "Z07:00"
TimeFormat4TZ = TimeFormat4 + "Z07:00"
TimeFormat5TZ = TimeFormat5 + "Z07:00"
TimeFormat6TZ = TimeFormat6 + "Z07:00"
TimeFormat7TZ = TimeFormat7 + "Z07:00"
TimeFormat8TZ = TimeFormat8 + "Z07:00"
TimeFormat9TZ = TimeFormat9 + "Z07:00"
TimeFormat10TZ = TimeFormat10 + "Z07:00"
// Numeric formats
TimeFormatJulianDay TimeFormat = "julianday"
TimeFormatUnix TimeFormat = "unixepoch"
TimeFormatUnixFrac TimeFormat = "unixepoch_frac"
TimeFormatUnixMilli TimeFormat = "unixepoch_milli" // not an SQLite format
TimeFormatUnixMicro TimeFormat = "unixepoch_micro" // not an SQLite format
TimeFormatUnixNano TimeFormat = "unixepoch_nano" // not an SQLite format
// Auto
TimeFormatAuto TimeFormat = "auto"
)
// Encode encodes a time value using this format.
//
// [TimeFormatDefault] and [TimeFormatAuto] encode using [time.RFC3339Nano],
// with nanosecond accuracy, and preserving any timezone offset.
//
// This is the format used by the [database/sql] driver:
// [database/sql.Row.Scan] will decode as [time.Time]
// values encoded with [time.RFC3339Nano].
//
// Time values encoded with [time.RFC3339Nano] cannot be sorted as strings
// to produce a time-ordered sequence.
//
// Assuming that the time zones of the time values are the same (e.g., all in UTC),
// and expressed using the same string (e.g., all "Z" or all "+00:00"),
// use the TIME [collating sequence] to produce a time-ordered sequence.
//
// Otherwise, use [TimeFormat7] for time-ordered encoding.
//
// Formats [TimeFormat1] through [TimeFormat10]
// convert time values to UTC before encoding.
//
// Returns a string for the text formats,
// a float64 for [TimeFormatJulianDay] and [TimeFormatUnixFrac],
// or an int64 for the other numeric formats.
//
// https://sqlite.org/lang_datefunc.html
//
// [collating sequence]: https://sqlite.org/datatype3.html#collating_sequences
func (f TimeFormat) Encode(t time.Time) any {
switch f {
// Numeric formats
case TimeFormatJulianDay:
return julianday.Float(t)
case TimeFormatUnix:
return t.Unix()
case TimeFormatUnixFrac:
return float64(t.Unix()) + float64(t.Nanosecond())*1e-9
case TimeFormatUnixMilli:
return t.UnixMilli()
case TimeFormatUnixMicro:
return t.UnixMicro()
case TimeFormatUnixNano:
return t.UnixNano()
// Special formats.
case TimeFormatDefault, TimeFormatAuto:
f = time.RFC3339Nano
// SQLite assumes UTC if unspecified.
case
TimeFormat1, TimeFormat2,
TimeFormat3, TimeFormat4,
TimeFormat5, TimeFormat6,
TimeFormat7, TimeFormat8,
TimeFormat9, TimeFormat10:
t = t.UTC()
}
return t.Format(string(f))
}
// Decode decodes a time value using this format.
//
// The time value can be a string, an int64, or a float64.
//
// Formats [TimeFormat8] through [TimeFormat10]
// (and [TimeFormat8TZ] through [TimeFormat10TZ])
// assume a date of 2000-01-01.
//
// The timezone indicator and fractional seconds are always optional
// for formats [TimeFormat2] through [TimeFormat10]
// (and [TimeFormat2TZ] through [TimeFormat10TZ]).
//
// [TimeFormatAuto] implements (and extends) the SQLite auto modifier.
// Julian day numbers are safe to use for historical dates,
// from 4712BC through 9999AD.
// Unix timestamps (expressed in seconds, milliseconds, microseconds, or nanoseconds)
// are safe to use for current events, from at least 1980 through at least 2260.
// Unix timestamps before 1980 and after 9999 may be misinterpreted as julian day numbers,
// or have the wrong time unit.
//
// https://sqlite.org/lang_datefunc.html
func (f TimeFormat) Decode(v any) (time.Time, error) {
switch f {
// Numeric formats.
case TimeFormatJulianDay:
switch v := v.(type) {
case string:
return julianday.Parse(v)
case float64:
return julianday.FloatTime(v), nil
case int64:
return julianday.Time(v, 0), nil
default:
return time.Time{}, util.TimeErr
}
case TimeFormatUnix, TimeFormatUnixFrac:
if s, ok := v.(string); ok {
f, err := strconv.ParseFloat(s, 64)
if err != nil {
return time.Time{}, err
}
v = f
}
switch v := v.(type) {
case float64:
sec, frac := math.Modf(v)
nsec := math.Floor(frac * 1e9)
return time.Unix(int64(sec), int64(nsec)).UTC(), nil
case int64:
return time.Unix(v, 0).UTC(), nil
default:
return time.Time{}, util.TimeErr
}
case TimeFormatUnixMilli:
if s, ok := v.(string); ok {
i, err := strconv.ParseInt(s, 10, 64)
if err != nil {
return time.Time{}, err
}
v = i
}
switch v := v.(type) {
case float64:
return time.UnixMilli(int64(math.Floor(v))).UTC(), nil
case int64:
return time.UnixMilli(v).UTC(), nil
default:
return time.Time{}, util.TimeErr
}
case TimeFormatUnixMicro:
if s, ok := v.(string); ok {
i, err := strconv.ParseInt(s, 10, 64)
if err != nil {
return time.Time{}, err
}
v = i
}
switch v := v.(type) {
case float64:
return time.UnixMicro(int64(math.Floor(v))).UTC(), nil
case int64:
return time.UnixMicro(v).UTC(), nil
default:
return time.Time{}, util.TimeErr
}
case TimeFormatUnixNano:
if s, ok := v.(string); ok {
i, err := strconv.ParseInt(s, 10, 64)
if err != nil {
return time.Time{}, util.TimeErr
}
v = i
}
switch v := v.(type) {
case float64:
return time.Unix(0, int64(math.Floor(v))).UTC(), nil
case int64:
return time.Unix(0, v).UTC(), nil
default:
return time.Time{}, util.TimeErr
}
// Special formats.
case TimeFormatAuto:
switch s := v.(type) {
case string:
i, err := strconv.ParseInt(s, 10, 64)
if err == nil {
v = i
break
}
f, err := strconv.ParseFloat(s, 64)
if err == nil {
v = f
break
}
dates := []TimeFormat{
TimeFormat9, TimeFormat8,
TimeFormat6, TimeFormat5,
TimeFormat3, TimeFormat2, TimeFormat1,
}
for _, f := range dates {
t, err := f.Decode(s)
if err == nil {
return t, nil
}
}
}
switch v := v.(type) {
case float64:
if 0 <= v && v < 5373484.5 {
return TimeFormatJulianDay.Decode(v)
}
if v < 253402300800 {
return TimeFormatUnixFrac.Decode(v)
}
if v < 253402300800_000 {
return TimeFormatUnixMilli.Decode(v)
}
if v < 253402300800_000000 {
return TimeFormatUnixMicro.Decode(v)
}
return TimeFormatUnixNano.Decode(v)
case int64:
if 0 <= v && v < 5373485 {
return TimeFormatJulianDay.Decode(v)
}
if v < 253402300800 {
return TimeFormatUnixFrac.Decode(v)
}
if v < 253402300800_000 {
return TimeFormatUnixMilli.Decode(v)
}
if v < 253402300800_000000 {
return TimeFormatUnixMicro.Decode(v)
}
return TimeFormatUnixNano.Decode(v)
default:
return time.Time{}, util.TimeErr
}
case
TimeFormat2, TimeFormat2TZ,
TimeFormat3, TimeFormat3TZ,
TimeFormat4, TimeFormat4TZ,
TimeFormat5, TimeFormat5TZ,
TimeFormat6, TimeFormat6TZ,
TimeFormat7, TimeFormat7TZ:
s, ok := v.(string)
if !ok {
return time.Time{}, util.TimeErr
}
return f.parseRelaxed(s)
case
TimeFormat8, TimeFormat8TZ,
TimeFormat9, TimeFormat9TZ,
TimeFormat10, TimeFormat10TZ:
s, ok := v.(string)
if !ok {
return time.Time{}, util.TimeErr
}
t, err := f.parseRelaxed(s)
if err != nil {
return time.Time{}, err
}
return t.AddDate(2000, 0, 0), nil
default:
s, ok := v.(string)
if !ok {
return time.Time{}, util.TimeErr
}
if f == "" {
f = time.RFC3339Nano
}
return time.Parse(string(f), s)
}
}
func (f TimeFormat) parseRelaxed(s string) (time.Time, error) {
fs := string(f)
fs = strings.TrimSuffix(fs, "Z07:00")
fs = strings.TrimSuffix(fs, ".000")
t, err := time.Parse(fs+"Z07:00", s)
if err != nil {
return time.Parse(fs, s)
}
return t, nil
}
// Scanner returns a [database/sql.Scanner] that can be used as an argument to
// [database/sql.Row.Scan] and similar methods to
// decode a time value into dest using this format.
func (f TimeFormat) Scanner(dest *time.Time) interface{ Scan(any) error } {
return timeScanner{dest, f}
}
type timeScanner struct {
*time.Time
TimeFormat
}
func (s timeScanner) Scan(src any) error {
var ok bool
var err error
if *s.Time, ok = src.(time.Time); !ok {
*s.Time, err = s.Decode(src)
}
return err
}

294
vendor/github.com/ncruces/go-sqlite3/txn.go generated vendored Normal file
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@ -0,0 +1,294 @@
package sqlite3
import (
"context"
"errors"
"fmt"
"math/rand"
"runtime"
"strconv"
"strings"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/tetratelabs/wazero/api"
)
// Txn is an in-progress database transaction.
//
// https://sqlite.org/lang_transaction.html
type Txn struct {
c *Conn
}
// Begin starts a deferred transaction.
//
// https://sqlite.org/lang_transaction.html
func (c *Conn) Begin() Txn {
// BEGIN even if interrupted.
err := c.txnExecInterrupted(`BEGIN DEFERRED`)
if err != nil {
panic(err)
}
return Txn{c}
}
// BeginImmediate starts an immediate transaction.
//
// https://sqlite.org/lang_transaction.html
func (c *Conn) BeginImmediate() (Txn, error) {
err := c.Exec(`BEGIN IMMEDIATE`)
if err != nil {
return Txn{}, err
}
return Txn{c}, nil
}
// BeginExclusive starts an exclusive transaction.
//
// https://sqlite.org/lang_transaction.html
func (c *Conn) BeginExclusive() (Txn, error) {
err := c.Exec(`BEGIN EXCLUSIVE`)
if err != nil {
return Txn{}, err
}
return Txn{c}, nil
}
// End calls either [Txn.Commit] or [Txn.Rollback]
// depending on whether *error points to a nil or non-nil error.
//
// This is meant to be deferred:
//
// func doWork(db *sqlite3.Conn) (err error) {
// tx := db.Begin()
// defer tx.End(&err)
//
// // ... do work in the transaction
// }
//
// https://sqlite.org/lang_transaction.html
func (tx Txn) End(errp *error) {
recovered := recover()
if recovered != nil {
defer panic(recovered)
}
if *errp == nil && recovered == nil {
// Success path.
if tx.c.GetAutocommit() { // There is nothing to commit.
return
}
*errp = tx.Commit()
if *errp == nil {
return
}
// Fall through to the error path.
}
// Error path.
if tx.c.GetAutocommit() { // There is nothing to rollback.
return
}
err := tx.Rollback()
if err != nil {
panic(err)
}
}
// Commit commits the transaction.
//
// https://sqlite.org/lang_transaction.html
func (tx Txn) Commit() error {
return tx.c.Exec(`COMMIT`)
}
// Rollback rolls back the transaction,
// even if the connection has been interrupted.
//
// https://sqlite.org/lang_transaction.html
func (tx Txn) Rollback() error {
return tx.c.txnExecInterrupted(`ROLLBACK`)
}
// Savepoint is a marker within a transaction
// that allows for partial rollback.
//
// https://sqlite.org/lang_savepoint.html
type Savepoint struct {
c *Conn
name string
}
// Savepoint establishes a new transaction savepoint.
//
// https://sqlite.org/lang_savepoint.html
func (c *Conn) Savepoint() Savepoint {
// Names can be reused; this makes catching bugs more likely.
name := saveptName() + "_" + strconv.Itoa(int(rand.Int31()))
err := c.txnExecInterrupted(fmt.Sprintf("SAVEPOINT %q;", name))
if err != nil {
panic(err)
}
return Savepoint{c: c, name: name}
}
func saveptName() (name string) {
defer func() {
if name == "" {
name = "sqlite3.Savepoint"
}
}()
var pc [8]uintptr
n := runtime.Callers(3, pc[:])
if n <= 0 {
return ""
}
frames := runtime.CallersFrames(pc[:n])
frame, more := frames.Next()
for more && (strings.HasPrefix(frame.Function, "database/sql.") ||
strings.HasPrefix(frame.Function, "github.com/ncruces/go-sqlite3/driver.")) {
frame, more = frames.Next()
}
return frame.Function
}
// Release releases the savepoint rolling back any changes
// if *error points to a non-nil error.
//
// This is meant to be deferred:
//
// func doWork(db *sqlite3.Conn) (err error) {
// savept := db.Savepoint()
// defer savept.Release(&err)
//
// // ... do work in the transaction
// }
func (s Savepoint) Release(errp *error) {
recovered := recover()
if recovered != nil {
defer panic(recovered)
}
if *errp == nil && recovered == nil {
// Success path.
if s.c.GetAutocommit() { // There is nothing to commit.
return
}
*errp = s.c.Exec(fmt.Sprintf("RELEASE %q;", s.name))
if *errp == nil {
return
}
// Fall through to the error path.
}
// Error path.
if s.c.GetAutocommit() { // There is nothing to rollback.
return
}
// ROLLBACK and RELEASE even if interrupted.
err := s.c.txnExecInterrupted(fmt.Sprintf(`
ROLLBACK TO %[1]q;
RELEASE %[1]q;
`, s.name))
if err != nil {
panic(err)
}
}
// Rollback rolls the transaction back to the savepoint,
// even if the connection has been interrupted.
// Rollback does not release the savepoint.
//
// https://sqlite.org/lang_transaction.html
func (s Savepoint) Rollback() error {
// ROLLBACK even if interrupted.
return s.c.txnExecInterrupted(fmt.Sprintf("ROLLBACK TO %q;", s.name))
}
func (c *Conn) txnExecInterrupted(sql string) error {
err := c.Exec(sql)
if errors.Is(err, INTERRUPT) {
old := c.SetInterrupt(context.Background())
defer c.SetInterrupt(old)
err = c.Exec(sql)
}
return err
}
// TxnState starts a deferred transaction.
//
// https://sqlite.org/c3ref/txn_state.html
func (c *Conn) TxnState(schema string) TxnState {
var ptr uint32
if schema != "" {
defer c.arena.mark()()
ptr = c.arena.string(schema)
}
r := c.call("sqlite3_txn_state", uint64(c.handle), uint64(ptr))
return TxnState(r)
}
// CommitHook registers a callback function to be invoked
// whenever a transaction is committed.
// Return true to allow the commit operation to continue normally.
//
// https://sqlite.org/c3ref/commit_hook.html
func (c *Conn) CommitHook(cb func() (ok bool)) {
var enable uint64
if cb != nil {
enable = 1
}
c.call("sqlite3_commit_hook_go", uint64(c.handle), enable)
c.commit = cb
}
// RollbackHook registers a callback function to be invoked
// whenever a transaction is rolled back.
//
// https://sqlite.org/c3ref/commit_hook.html
func (c *Conn) RollbackHook(cb func()) {
var enable uint64
if cb != nil {
enable = 1
}
c.call("sqlite3_rollback_hook_go", uint64(c.handle), enable)
c.rollback = cb
}
// UpdateHook registers a callback function to be invoked
// whenever a row is updated, inserted or deleted in a rowid table.
//
// https://sqlite.org/c3ref/update_hook.html
func (c *Conn) UpdateHook(cb func(action AuthorizerActionCode, schema, table string, rowid int64)) {
var enable uint64
if cb != nil {
enable = 1
}
c.call("sqlite3_update_hook_go", uint64(c.handle), enable)
c.update = cb
}
func commitCallback(ctx context.Context, mod api.Module, pDB uint32) (rollback uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.commit != nil {
if !c.commit() {
rollback = 1
}
}
return rollback
}
func rollbackCallback(ctx context.Context, mod api.Module, pDB uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.rollback != nil {
c.rollback()
}
}
func updateCallback(ctx context.Context, mod api.Module, pDB uint32, action AuthorizerActionCode, zSchema, zTabName uint32, rowid uint64) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.update != nil {
schema := util.ReadString(mod, zSchema, _MAX_NAME)
table := util.ReadString(mod, zTabName, _MAX_NAME)
c.update(action, schema, table, int64(rowid))
}
}

16
vendor/github.com/ncruces/go-sqlite3/util/osutil/open.go generated vendored Normal file
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@ -0,0 +1,16 @@
//go:build !windows
package osutil
import (
"io/fs"
"os"
)
// OpenFile behaves the same as [os.OpenFile],
// except on Windows it sets [syscall.FILE_SHARE_DELETE].
//
// See: https://go.dev/issue/32088#issuecomment-502850674
func OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
return os.OpenFile(name, flag, perm)
}

112
vendor/github.com/ncruces/go-sqlite3/util/osutil/open_windows.go generated vendored Normal file
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@ -0,0 +1,112 @@
package osutil
import (
"io/fs"
"os"
. "syscall"
"unsafe"
)
// OpenFile behaves the same as [os.OpenFile],
// except on Windows it sets [syscall.FILE_SHARE_DELETE].
//
// See: https://go.dev/issue/32088#issuecomment-502850674
func OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
if name == "" {
return nil, &os.PathError{Op: "open", Path: name, Err: ENOENT}
}
r, e := syscallOpen(name, flag, uint32(perm.Perm()))
if e != nil {
return nil, &os.PathError{Op: "open", Path: name, Err: e}
}
return os.NewFile(uintptr(r), name), nil
}
// syscallOpen is a copy of [syscall.Open]
// that uses [syscall.FILE_SHARE_DELETE].
//
// https://go.dev/src/syscall/syscall_windows.go
func syscallOpen(path string, mode int, perm uint32) (fd Handle, err error) {
if len(path) == 0 {
return InvalidHandle, ERROR_FILE_NOT_FOUND
}
pathp, err := UTF16PtrFromString(path)
if err != nil {
return InvalidHandle, err
}
var access uint32
switch mode & (O_RDONLY | O_WRONLY | O_RDWR) {
case O_RDONLY:
access = GENERIC_READ
case O_WRONLY:
access = GENERIC_WRITE
case O_RDWR:
access = GENERIC_READ | GENERIC_WRITE
}
if mode&O_CREAT != 0 {
access |= GENERIC_WRITE
}
if mode&O_APPEND != 0 {
access &^= GENERIC_WRITE
access |= FILE_APPEND_DATA
}
sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE)
var sa *SecurityAttributes
if mode&O_CLOEXEC == 0 {
sa = makeInheritSa()
}
var createmode uint32
switch {
case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL):
createmode = CREATE_NEW
case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC):
createmode = CREATE_ALWAYS
case mode&O_CREAT == O_CREAT:
createmode = OPEN_ALWAYS
case mode&O_TRUNC == O_TRUNC:
createmode = TRUNCATE_EXISTING
default:
createmode = OPEN_EXISTING
}
var attrs uint32 = FILE_ATTRIBUTE_NORMAL
if perm&S_IWRITE == 0 {
attrs = FILE_ATTRIBUTE_READONLY
if createmode == CREATE_ALWAYS {
const _ERROR_BAD_NETPATH = Errno(53)
// We have been asked to create a read-only file.
// If the file already exists, the semantics of
// the Unix open system call is to preserve the
// existing permissions. If we pass CREATE_ALWAYS
// and FILE_ATTRIBUTE_READONLY to CreateFile,
// and the file already exists, CreateFile will
// change the file permissions.
// Avoid that to preserve the Unix semantics.
h, e := CreateFile(pathp, access, sharemode, sa, TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
switch e {
case ERROR_FILE_NOT_FOUND, _ERROR_BAD_NETPATH, ERROR_PATH_NOT_FOUND:
// File does not exist. These are the same
// errors as Errno.Is checks for ErrNotExist.
// Carry on to create the file.
default:
// Success or some different error.
return h, e
}
}
}
if createmode == OPEN_EXISTING && access == GENERIC_READ {
// Necessary for opening directory handles.
attrs |= FILE_FLAG_BACKUP_SEMANTICS
}
if mode&O_SYNC != 0 {
const _FILE_FLAG_WRITE_THROUGH = 0x80000000
attrs |= _FILE_FLAG_WRITE_THROUGH
}
return CreateFile(pathp, access, sharemode, sa, createmode, attrs, 0)
}
func makeInheritSa() *SecurityAttributes {
var sa SecurityAttributes
sa.Length = uint32(unsafe.Sizeof(sa))
sa.InheritHandle = 1
return &sa
}

33
vendor/github.com/ncruces/go-sqlite3/util/osutil/osfs.go generated vendored Normal file
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@ -0,0 +1,33 @@
package osutil
import (
"io/fs"
"os"
)
// FS implements [fs.FS], [fs.StatFS], and [fs.ReadFileFS]
// using package [os].
//
// This filesystem does not respect [fs.ValidPath] rules,
// and fails [testing/fstest.TestFS]!
//
// Still, it can be a useful tool to unify implementations
// that can access either the [os] filesystem or an [fs.FS].
// It's OK to use this to open files, but you should avoid
// opening directories, resolving paths, or walking the file system.
type FS struct{}
// Open implements [fs.FS].
func (FS) Open(name string) (fs.File, error) {
return OpenFile(name, os.O_RDONLY, 0)
}
// ReadFileFS implements [fs.StatFS].
func (FS) Stat(name string) (fs.FileInfo, error) {
return os.Stat(name)
}
// ReadFile implements [fs.ReadFileFS].
func (FS) ReadFile(name string) ([]byte, error) {
return os.ReadFile(name)
}

2
vendor/github.com/ncruces/go-sqlite3/util/osutil/osutil.go generated vendored Normal file
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@ -0,0 +1,2 @@
// Package osutil implements operating system utility functions.
package osutil

236
vendor/github.com/ncruces/go-sqlite3/value.go generated vendored Normal file
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@ -0,0 +1,236 @@
package sqlite3
import (
"encoding/json"
"math"
"strconv"
"time"
"github.com/ncruces/go-sqlite3/internal/util"
)
// Value is any value that can be stored in a database table.
//
// https://sqlite.org/c3ref/value.html
type Value struct {
c *Conn
handle uint32
unprot bool
copied bool
}
func (v Value) protected() uint64 {
if v.unprot {
panic(util.ValueErr)
}
return uint64(v.handle)
}
// Dup makes a copy of the SQL value and returns a pointer to that copy.
//
// https://sqlite.org/c3ref/value_dup.html
func (v Value) Dup() *Value {
r := v.c.call("sqlite3_value_dup", uint64(v.handle))
return &Value{
c: v.c,
copied: true,
handle: uint32(r),
}
}
// Close frees an SQL value previously obtained by [Value.Dup].
//
// https://sqlite.org/c3ref/value_dup.html
func (dup *Value) Close() error {
if !dup.copied {
panic(util.ValueErr)
}
dup.c.call("sqlite3_value_free", uint64(dup.handle))
dup.handle = 0
return nil
}
// Type returns the initial datatype of the value.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Type() Datatype {
r := v.c.call("sqlite3_value_type", v.protected())
return Datatype(r)
}
// Type returns the numeric datatype of the value.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) NumericType() Datatype {
r := v.c.call("sqlite3_value_numeric_type", v.protected())
return Datatype(r)
}
// Bool returns the value as a bool.
// SQLite does not have a separate boolean storage class.
// Instead, boolean values are retrieved as integers,
// with 0 converted to false and any other value to true.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Bool() bool {
return v.Int64() != 0
}
// Int returns the value as an int.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Int() int {
return int(v.Int64())
}
// Int64 returns the value as an int64.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Int64() int64 {
r := v.c.call("sqlite3_value_int64", v.protected())
return int64(r)
}
// Float returns the value as a float64.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Float() float64 {
r := v.c.call("sqlite3_value_double", v.protected())
return math.Float64frombits(r)
}
// Time returns the value as a [time.Time].
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Time(format TimeFormat) time.Time {
var a any
switch v.Type() {
case INTEGER:
a = v.Int64()
case FLOAT:
a = v.Float()
case TEXT, BLOB:
a = v.Text()
case NULL:
return time.Time{}
default:
panic(util.AssertErr())
}
t, _ := format.Decode(a)
return t
}
// Text returns the value as a string.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Text() string {
return string(v.RawText())
}
// Blob appends to buf and returns
// the value as a []byte.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) Blob(buf []byte) []byte {
return append(buf, v.RawBlob()...)
}
// RawText returns the value as a []byte.
// The []byte is owned by SQLite and may be invalidated by
// subsequent calls to [Value] methods.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) RawText() []byte {
r := v.c.call("sqlite3_value_text", v.protected())
return v.rawBytes(uint32(r))
}
// RawBlob returns the value as a []byte.
// The []byte is owned by SQLite and may be invalidated by
// subsequent calls to [Value] methods.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) RawBlob() []byte {
r := v.c.call("sqlite3_value_blob", v.protected())
return v.rawBytes(uint32(r))
}
func (v Value) rawBytes(ptr uint32) []byte {
if ptr == 0 {
return nil
}
r := v.c.call("sqlite3_value_bytes", v.protected())
return util.View(v.c.mod, ptr, r)
}
// Pointer gets the pointer associated with this value,
// or nil if it has no associated pointer.
func (v Value) Pointer() any {
r := v.c.call("sqlite3_value_pointer_go", v.protected())
return util.GetHandle(v.c.ctx, uint32(r))
}
// JSON parses a JSON-encoded value
// and stores the result in the value pointed to by ptr.
func (v Value) JSON(ptr any) error {
var data []byte
switch v.Type() {
case NULL:
data = append(data, "null"...)
case TEXT:
data = v.RawText()
case BLOB:
data = v.RawBlob()
case INTEGER:
data = strconv.AppendInt(nil, v.Int64(), 10)
case FLOAT:
data = strconv.AppendFloat(nil, v.Float(), 'g', -1, 64)
default:
panic(util.AssertErr())
}
return json.Unmarshal(data, ptr)
}
// NoChange returns true if and only if the value is unchanged
// in a virtual table update operatiom.
//
// https://sqlite.org/c3ref/value_blob.html
func (v Value) NoChange() bool {
r := v.c.call("sqlite3_value_nochange", v.protected())
return r != 0
}
// InFirst returns the first element
// on the right-hand side of an IN constraint.
//
// https://sqlite.org/c3ref/vtab_in_first.html
func (v Value) InFirst() (Value, error) {
defer v.c.arena.mark()()
valPtr := v.c.arena.new(ptrlen)
r := v.c.call("sqlite3_vtab_in_first", uint64(v.handle), uint64(valPtr))
if err := v.c.error(r); err != nil {
return Value{}, err
}
return Value{
c: v.c,
handle: util.ReadUint32(v.c.mod, valPtr),
}, nil
}
// InNext returns the next element
// on the right-hand side of an IN constraint.
//
// https://sqlite.org/c3ref/vtab_in_first.html
func (v Value) InNext() (Value, error) {
defer v.c.arena.mark()()
valPtr := v.c.arena.new(ptrlen)
r := v.c.call("sqlite3_vtab_in_next", uint64(v.handle), uint64(valPtr))
if err := v.c.error(r); err != nil {
return Value{}, err
}
return Value{
c: v.c,
handle: util.ReadUint32(v.c.mod, valPtr),
}, nil
}

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# Go SQLite VFS API
This package implements the SQLite [OS Interface](https://sqlite.org/vfs.html) (aka VFS).
It replaces the default SQLite VFS with a **pure Go** implementation,
and exposes [interfaces](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#VFS)
that should allow you to implement your own custom VFSes.
Since it is a from scratch reimplementation,
there are naturally some ways it deviates from the original.
The main differences are [file locking](#file-locking) and [WAL mode](#write-ahead-logging) support.
### File Locking
POSIX advisory locks, which SQLite uses on Unix, are
[broken by design](https://github.com/sqlite/sqlite/blob/b74eb0/src/os_unix.c#L1073-L1161).
On Linux and macOS, this module uses
[OFD locks](https://www.gnu.org/software/libc/manual/html_node/Open-File-Description-Locks.html)
to synchronize access to database files.
OFD locks are fully compatible with POSIX advisory locks.
This module can also use
[BSD locks](https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2),
albeit with reduced concurrency (`BEGIN IMMEDIATE` behaves like `BEGIN EXCLUSIVE`).
On BSD, macOS, and illumos, BSD locks are fully compatible with POSIX advisory locks;
on Linux and z/OS, they are fully functional, but incompatible;
elsewhere, they are very likely broken.
BSD locks are the default on BSD and illumos,
but you can opt into them with the `sqlite3_flock` build tag.
On Windows, this module uses `LockFileEx` and `UnlockFileEx`,
like SQLite.
Otherwise, file locking is not supported, and you must use
[`nolock=1`](https://sqlite.org/uri.html#urinolock)
(or [`immutable=1`](https://sqlite.org/uri.html#uriimmutable))
to open database files.
To use the [`database/sql`](https://pkg.go.dev/database/sql) driver
with `nolock=1` you must disable connection pooling by calling
[`db.SetMaxOpenConns(1)`](https://pkg.go.dev/database/sql#DB.SetMaxOpenConns).
You can use [`vfs.SupportsFileLocking`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#SupportsFileLocking)
to check if your build supports file locking.
### Write-Ahead Logging
On 64-bit Linux and macOS, this module uses `mmap` to implement
[shared-memory for the WAL-index](https://sqlite.org/wal.html#implementation_of_shared_memory_for_the_wal_index),
like SQLite.
To allow `mmap` to work, each connection needs to reserve up to 4GB of address space.
To limit the address space each connection reserves,
use [`WithMemoryLimitPages`](../tests/testcfg/testcfg.go).
Otherwise, [WAL support is limited](https://sqlite.org/wal.html#noshm),
and `EXCLUSIVE` locking mode must be set to create, read, and write WAL databases.
To use `EXCLUSIVE` locking mode with the
[`database/sql`](https://pkg.go.dev/database/sql) driver
you must disable connection pooling by calling
[`db.SetMaxOpenConns(1)`](https://pkg.go.dev/database/sql#DB.SetMaxOpenConns).
You can use [`vfs.SupportsSharedMemory`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#SupportsSharedMemory)
to check if your build supports shared memory.
### Batch-Atomic Write
On 64-bit Linux, this module supports [batch-atomic writes](https://sqlite.org/cgi/src/technote/714)
on the F2FS filesystem.
### Build Tags
The VFS can be customized with a few build tags:
- `sqlite3_flock` forces the use of BSD locks; it can be used on z/OS to enable locking,
and elsewhere to test BSD locks.
- `sqlite3_nosys` prevents importing [`x/sys`](https://pkg.go.dev/golang.org/x/sys);
disables locking _and_ shared memory on all platforms.
- `sqlite3_noshm` disables shared memory on all platforms.
> [!IMPORTANT]
> The default configuration of this package is compatible with
> the standard [Unix and Windows SQLite VFSes](https://sqlite.org/vfs.html#multiple_vfses);
> `sqlite3_flock` is compatible with the [`unix-flock` VFS](https://sqlite.org/compile.html#enable_locking_style).
> If incompatible file locking is used, accessing databases concurrently with _other_ SQLite libraries
> will eventually corrupt data.

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// Package vfs wraps the C SQLite VFS API.
package vfs
import (
"context"
"io"
"github.com/tetratelabs/wazero/api"
)
// A VFS defines the interface between the SQLite core and the underlying operating system.
//
// Use sqlite3.ErrorCode or sqlite3.ExtendedErrorCode to return specific error codes to SQLite.
//
// https://sqlite.org/c3ref/vfs.html
type VFS interface {
Open(name string, flags OpenFlag) (File, OpenFlag, error)
Delete(name string, syncDir bool) error
Access(name string, flags AccessFlag) (bool, error)
FullPathname(name string) (string, error)
}
// VFSFilename extends VFS with the ability to use Filename
// objects for opening files.
//
// https://sqlite.org/c3ref/filename.html
type VFSFilename interface {
VFS
OpenFilename(name *Filename, flags OpenFlag) (File, OpenFlag, error)
}
// A File represents an open file in the OS interface layer.
//
// Use sqlite3.ErrorCode or sqlite3.ExtendedErrorCode to return specific error codes to SQLite.
// In particular, sqlite3.BUSY is necessary to correctly implement lock methods.
//
// https://sqlite.org/c3ref/io_methods.html
type File interface {
Close() error
ReadAt(p []byte, off int64) (n int, err error)
WriteAt(p []byte, off int64) (n int, err error)
Truncate(size int64) error
Sync(flags SyncFlag) error
Size() (int64, error)
Lock(lock LockLevel) error
Unlock(lock LockLevel) error
CheckReservedLock() (bool, error)
SectorSize() int
DeviceCharacteristics() DeviceCharacteristic
}
// FileLockState extends File to implement the
// SQLITE_FCNTL_LOCKSTATE file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntllockstate
type FileLockState interface {
File
LockState() LockLevel
}
// FileChunkSize extends File to implement the
// SQLITE_FCNTL_CHUNK_SIZE file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlchunksize
type FileChunkSize interface {
File
ChunkSize(size int)
}
// FileSizeHint extends File to implement the
// SQLITE_FCNTL_SIZE_HINT file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlsizehint
type FileSizeHint interface {
File
SizeHint(size int64) error
}
// FileHasMoved extends File to implement the
// SQLITE_FCNTL_HAS_MOVED file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlhasmoved
type FileHasMoved interface {
File
HasMoved() (bool, error)
}
// FileOverwrite extends File to implement the
// SQLITE_FCNTL_OVERWRITE file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntloverwrite
type FileOverwrite interface {
File
Overwrite() error
}
// FilePersistentWAL extends File to implement the
// SQLITE_FCNTL_PERSIST_WAL file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpersistwal
type FilePersistentWAL interface {
File
PersistentWAL() bool
SetPersistentWAL(bool)
}
// FilePowersafeOverwrite extends File to implement the
// SQLITE_FCNTL_POWERSAFE_OVERWRITE file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpowersafeoverwrite
type FilePowersafeOverwrite interface {
File
PowersafeOverwrite() bool
SetPowersafeOverwrite(bool)
}
// FileCommitPhaseTwo extends File to implement the
// SQLITE_FCNTL_COMMIT_PHASETWO file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlcommitphasetwo
type FileCommitPhaseTwo interface {
File
CommitPhaseTwo() error
}
// FileBatchAtomicWrite extends File to implement the
// SQLITE_FCNTL_BEGIN_ATOMIC_WRITE, SQLITE_FCNTL_COMMIT_ATOMIC_WRITE
// and SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE file control opcodes.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlbeginatomicwrite
type FileBatchAtomicWrite interface {
File
BeginAtomicWrite() error
CommitAtomicWrite() error
RollbackAtomicWrite() error
}
// FilePragma extends File to implement the
// SQLITE_FCNTL_PRAGMA file control opcode.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpragma
type FilePragma interface {
File
Pragma(name, value string) (string, error)
}
// FileCheckpoint extends File to implement the
// SQLITE_FCNTL_CKPT_START and SQLITE_FCNTL_CKPT_DONE
// file control opcodes.
//
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlckptstart
type FileCheckpoint interface {
File
CheckpointDone() error
CheckpointStart() error
}
// FileSharedMemory extends File to possibly implement
// shared-memory for the WAL-index.
// The same shared-memory instance must be returned
// for the entire life of the file.
// It's OK for SharedMemory to return nil.
type FileSharedMemory interface {
File
SharedMemory() SharedMemory
}
// SharedMemory is a shared-memory WAL-index implementation.
// Use [NewSharedMemory] to create a shared-memory.
type SharedMemory interface {
shmMap(context.Context, api.Module, int32, int32, bool) (uint32, error)
shmLock(int32, int32, _ShmFlag) error
shmUnmap(bool)
io.Closer
}

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package vfs
import "github.com/ncruces/go-sqlite3/internal/util"
const (
_MAX_NAME = 1e6 // Self-imposed limit for most NUL terminated strings.
_MAX_SQL_LENGTH = 1e9
_MAX_PATHNAME = 1024
_DEFAULT_SECTOR_SIZE = 4096
ptrlen = 4
)
// https://sqlite.org/rescode.html
type _ErrorCode uint32
func (e _ErrorCode) Error() string {
return util.ErrorCodeString(uint32(e))
}
const (
_OK _ErrorCode = util.OK
_ERROR _ErrorCode = util.ERROR
_PERM _ErrorCode = util.PERM
_BUSY _ErrorCode = util.BUSY
_READONLY _ErrorCode = util.READONLY
_IOERR _ErrorCode = util.IOERR
_NOTFOUND _ErrorCode = util.NOTFOUND
_CANTOPEN _ErrorCode = util.CANTOPEN
_IOERR_READ _ErrorCode = util.IOERR_READ
_IOERR_SHORT_READ _ErrorCode = util.IOERR_SHORT_READ
_IOERR_WRITE _ErrorCode = util.IOERR_WRITE
_IOERR_FSYNC _ErrorCode = util.IOERR_FSYNC
_IOERR_DIR_FSYNC _ErrorCode = util.IOERR_DIR_FSYNC
_IOERR_TRUNCATE _ErrorCode = util.IOERR_TRUNCATE
_IOERR_FSTAT _ErrorCode = util.IOERR_FSTAT
_IOERR_UNLOCK _ErrorCode = util.IOERR_UNLOCK
_IOERR_RDLOCK _ErrorCode = util.IOERR_RDLOCK
_IOERR_DELETE _ErrorCode = util.IOERR_DELETE
_IOERR_ACCESS _ErrorCode = util.IOERR_ACCESS
_IOERR_CHECKRESERVEDLOCK _ErrorCode = util.IOERR_CHECKRESERVEDLOCK
_IOERR_LOCK _ErrorCode = util.IOERR_LOCK
_IOERR_CLOSE _ErrorCode = util.IOERR_CLOSE
_IOERR_SHMOPEN _ErrorCode = util.IOERR_SHMOPEN
_IOERR_SHMSIZE _ErrorCode = util.IOERR_SHMSIZE
_IOERR_SHMLOCK _ErrorCode = util.IOERR_SHMLOCK
_IOERR_SHMMAP _ErrorCode = util.IOERR_SHMMAP
_IOERR_SEEK _ErrorCode = util.IOERR_SEEK
_IOERR_DELETE_NOENT _ErrorCode = util.IOERR_DELETE_NOENT
_IOERR_BEGIN_ATOMIC _ErrorCode = util.IOERR_BEGIN_ATOMIC
_IOERR_COMMIT_ATOMIC _ErrorCode = util.IOERR_COMMIT_ATOMIC
_IOERR_ROLLBACK_ATOMIC _ErrorCode = util.IOERR_ROLLBACK_ATOMIC
_CANTOPEN_FULLPATH _ErrorCode = util.CANTOPEN_FULLPATH
_CANTOPEN_ISDIR _ErrorCode = util.CANTOPEN_ISDIR
_READONLY_CANTINIT _ErrorCode = util.READONLY_CANTINIT
_OK_SYMLINK _ErrorCode = util.OK_SYMLINK
)
// OpenFlag is a flag for the [VFS] Open method.
//
// https://sqlite.org/c3ref/c_open_autoproxy.html
type OpenFlag uint32
const (
OPEN_READONLY OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
OPEN_READWRITE OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
OPEN_CREATE OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
OPEN_DELETEONCLOSE OpenFlag = 0x00000008 /* VFS only */
OPEN_EXCLUSIVE OpenFlag = 0x00000010 /* VFS only */
OPEN_AUTOPROXY OpenFlag = 0x00000020 /* VFS only */
OPEN_URI OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
OPEN_MEMORY OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
OPEN_MAIN_DB OpenFlag = 0x00000100 /* VFS only */
OPEN_TEMP_DB OpenFlag = 0x00000200 /* VFS only */
OPEN_TRANSIENT_DB OpenFlag = 0x00000400 /* VFS only */
OPEN_MAIN_JOURNAL OpenFlag = 0x00000800 /* VFS only */
OPEN_TEMP_JOURNAL OpenFlag = 0x00001000 /* VFS only */
OPEN_SUBJOURNAL OpenFlag = 0x00002000 /* VFS only */
OPEN_SUPER_JOURNAL OpenFlag = 0x00004000 /* VFS only */
OPEN_NOMUTEX OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
OPEN_FULLMUTEX OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
OPEN_SHAREDCACHE OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
OPEN_PRIVATECACHE OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
OPEN_WAL OpenFlag = 0x00080000 /* VFS only */
OPEN_NOFOLLOW OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
)
// AccessFlag is a flag for the [VFS] Access method.
//
// https://sqlite.org/c3ref/c_access_exists.html
type AccessFlag uint32
const (
ACCESS_EXISTS AccessFlag = 0
ACCESS_READWRITE AccessFlag = 1 /* Used by PRAGMA temp_store_directory */
ACCESS_READ AccessFlag = 2 /* Unused */
)
// SyncFlag is a flag for the [File] Sync method.
//
// https://sqlite.org/c3ref/c_sync_dataonly.html
type SyncFlag uint32
const (
SYNC_NORMAL SyncFlag = 0x00002
SYNC_FULL SyncFlag = 0x00003
SYNC_DATAONLY SyncFlag = 0x00010
)
// LockLevel is a value used with [File] Lock and Unlock methods.
//
// https://sqlite.org/c3ref/c_lock_exclusive.html
type LockLevel uint32
const (
// No locks are held on the database.
// The database may be neither read nor written.
// Any internally cached data is considered suspect and subject to
// verification against the database file before being used.
// Other processes can read or write the database as their own locking
// states permit.
// This is the default state.
LOCK_NONE LockLevel = 0 /* xUnlock() only */
// The database may be read but not written.
// Any number of processes can hold SHARED locks at the same time,
// hence there can be many simultaneous readers.
// But no other thread or process is allowed to write to the database file
// while one or more SHARED locks are active.
LOCK_SHARED LockLevel = 1 /* xLock() or xUnlock() */
// A RESERVED lock means that the process is planning on writing to the
// database file at some point in the future but that it is currently just
// reading from the file.
// Only a single RESERVED lock may be active at one time,
// though multiple SHARED locks can coexist with a single RESERVED lock.
// RESERVED differs from PENDING in that new SHARED locks can be acquired
// while there is a RESERVED lock.
LOCK_RESERVED LockLevel = 2 /* xLock() only */
// A PENDING lock means that the process holding the lock wants to write to
// the database as soon as possible and is just waiting on all current
// SHARED locks to clear so that it can get an EXCLUSIVE lock.
// No new SHARED locks are permitted against the database if a PENDING lock
// is active, though existing SHARED locks are allowed to continue.
LOCK_PENDING LockLevel = 3 /* internal use only */
// An EXCLUSIVE lock is needed in order to write to the database file.
// Only one EXCLUSIVE lock is allowed on the file and no other locks of any
// kind are allowed to coexist with an EXCLUSIVE lock.
// In order to maximize concurrency, SQLite works to minimize the amount of
// time that EXCLUSIVE locks are held.
LOCK_EXCLUSIVE LockLevel = 4 /* xLock() only */
)
// DeviceCharacteristic is a flag retuned by the [File] DeviceCharacteristics method.
//
// https://sqlite.org/c3ref/c_iocap_atomic.html
type DeviceCharacteristic uint32
const (
IOCAP_ATOMIC DeviceCharacteristic = 0x00000001
IOCAP_ATOMIC512 DeviceCharacteristic = 0x00000002
IOCAP_ATOMIC1K DeviceCharacteristic = 0x00000004
IOCAP_ATOMIC2K DeviceCharacteristic = 0x00000008
IOCAP_ATOMIC4K DeviceCharacteristic = 0x00000010
IOCAP_ATOMIC8K DeviceCharacteristic = 0x00000020
IOCAP_ATOMIC16K DeviceCharacteristic = 0x00000040
IOCAP_ATOMIC32K DeviceCharacteristic = 0x00000080
IOCAP_ATOMIC64K DeviceCharacteristic = 0x00000100
IOCAP_SAFE_APPEND DeviceCharacteristic = 0x00000200
IOCAP_SEQUENTIAL DeviceCharacteristic = 0x00000400
IOCAP_UNDELETABLE_WHEN_OPEN DeviceCharacteristic = 0x00000800
IOCAP_POWERSAFE_OVERWRITE DeviceCharacteristic = 0x00001000
IOCAP_IMMUTABLE DeviceCharacteristic = 0x00002000
IOCAP_BATCH_ATOMIC DeviceCharacteristic = 0x00004000
)
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
type _FcntlOpcode uint32
const (
_FCNTL_LOCKSTATE _FcntlOpcode = 1
_FCNTL_GET_LOCKPROXYFILE _FcntlOpcode = 2
_FCNTL_SET_LOCKPROXYFILE _FcntlOpcode = 3
_FCNTL_LAST_ERRNO _FcntlOpcode = 4
_FCNTL_SIZE_HINT _FcntlOpcode = 5
_FCNTL_CHUNK_SIZE _FcntlOpcode = 6
_FCNTL_FILE_POINTER _FcntlOpcode = 7
_FCNTL_SYNC_OMITTED _FcntlOpcode = 8
_FCNTL_WIN32_AV_RETRY _FcntlOpcode = 9
_FCNTL_PERSIST_WAL _FcntlOpcode = 10
_FCNTL_OVERWRITE _FcntlOpcode = 11
_FCNTL_VFSNAME _FcntlOpcode = 12
_FCNTL_POWERSAFE_OVERWRITE _FcntlOpcode = 13
_FCNTL_PRAGMA _FcntlOpcode = 14
_FCNTL_BUSYHANDLER _FcntlOpcode = 15
_FCNTL_TEMPFILENAME _FcntlOpcode = 16
_FCNTL_MMAP_SIZE _FcntlOpcode = 18
_FCNTL_TRACE _FcntlOpcode = 19
_FCNTL_HAS_MOVED _FcntlOpcode = 20
_FCNTL_SYNC _FcntlOpcode = 21
_FCNTL_COMMIT_PHASETWO _FcntlOpcode = 22
_FCNTL_WIN32_SET_HANDLE _FcntlOpcode = 23
_FCNTL_WAL_BLOCK _FcntlOpcode = 24
_FCNTL_ZIPVFS _FcntlOpcode = 25
_FCNTL_RBU _FcntlOpcode = 26
_FCNTL_VFS_POINTER _FcntlOpcode = 27
_FCNTL_JOURNAL_POINTER _FcntlOpcode = 28
_FCNTL_WIN32_GET_HANDLE _FcntlOpcode = 29
_FCNTL_PDB _FcntlOpcode = 30
_FCNTL_BEGIN_ATOMIC_WRITE _FcntlOpcode = 31
_FCNTL_COMMIT_ATOMIC_WRITE _FcntlOpcode = 32
_FCNTL_ROLLBACK_ATOMIC_WRITE _FcntlOpcode = 33
_FCNTL_LOCK_TIMEOUT _FcntlOpcode = 34
_FCNTL_DATA_VERSION _FcntlOpcode = 35
_FCNTL_SIZE_LIMIT _FcntlOpcode = 36
_FCNTL_CKPT_DONE _FcntlOpcode = 37
_FCNTL_RESERVE_BYTES _FcntlOpcode = 38
_FCNTL_CKPT_START _FcntlOpcode = 39
_FCNTL_EXTERNAL_READER _FcntlOpcode = 40
_FCNTL_CKSM_FILE _FcntlOpcode = 41
_FCNTL_RESET_CACHE _FcntlOpcode = 42
)
// https://sqlite.org/c3ref/c_shm_exclusive.html
type _ShmFlag uint32
const (
_SHM_UNLOCK _ShmFlag = 1
_SHM_LOCK _ShmFlag = 2
_SHM_SHARED _ShmFlag = 4
_SHM_EXCLUSIVE _ShmFlag = 8
)

217
vendor/github.com/ncruces/go-sqlite3/vfs/file.go generated vendored Normal file
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package vfs
import (
"errors"
"io"
"io/fs"
"os"
"path/filepath"
"runtime"
"syscall"
"github.com/ncruces/go-sqlite3/util/osutil"
)
type vfsOS struct{}
func (vfsOS) FullPathname(path string) (string, error) {
path, err := filepath.Abs(path)
if err != nil {
return "", err
}
fi, err := os.Lstat(path)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
return path, nil
}
return "", err
}
if fi.Mode()&fs.ModeSymlink != 0 {
err = _OK_SYMLINK
}
return path, err
}
func (vfsOS) Delete(path string, syncDir bool) error {
err := os.Remove(path)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
return _IOERR_DELETE_NOENT
}
return err
}
if runtime.GOOS != "windows" && syncDir {
f, err := os.Open(filepath.Dir(path))
if err != nil {
return _OK
}
defer f.Close()
err = osSync(f, false, false)
if err != nil {
return _IOERR_DIR_FSYNC
}
}
return nil
}
func (vfsOS) Access(name string, flags AccessFlag) (bool, error) {
err := osAccess(name, flags)
if flags == ACCESS_EXISTS {
if errors.Is(err, fs.ErrNotExist) {
return false, nil
}
} else {
if errors.Is(err, fs.ErrPermission) {
return false, nil
}
}
return err == nil, err
}
func (vfsOS) Open(name string, flags OpenFlag) (File, OpenFlag, error) {
return nil, 0, _CANTOPEN
}
func (vfsOS) OpenFilename(name *Filename, flags OpenFlag) (File, OpenFlag, error) {
var oflags int
if flags&OPEN_EXCLUSIVE != 0 {
oflags |= os.O_EXCL
}
if flags&OPEN_CREATE != 0 {
oflags |= os.O_CREATE
}
if flags&OPEN_READONLY != 0 {
oflags |= os.O_RDONLY
}
if flags&OPEN_READWRITE != 0 {
oflags |= os.O_RDWR
}
var err error
var f *os.File
if name == nil {
f, err = os.CreateTemp("", "*.db")
} else {
f, err = osutil.OpenFile(name.String(), oflags, 0666)
}
if err != nil {
if errors.Is(err, syscall.EISDIR) {
return nil, flags, _CANTOPEN_ISDIR
}
return nil, flags, err
}
if modeof := name.URIParameter("modeof"); modeof != "" {
if err = osSetMode(f, modeof); err != nil {
f.Close()
return nil, flags, _IOERR_FSTAT
}
}
if flags&OPEN_DELETEONCLOSE != 0 {
os.Remove(f.Name())
}
file := vfsFile{
File: f,
psow: true,
readOnly: flags&OPEN_READONLY != 0,
syncDir: runtime.GOOS != "windows" &&
flags&(OPEN_CREATE) != 0 &&
flags&(OPEN_MAIN_JOURNAL|OPEN_SUPER_JOURNAL|OPEN_WAL) != 0,
shm: NewSharedMemory(name.String()+"-shm", flags),
}
return &file, flags, nil
}
type vfsFile struct {
*os.File
shm SharedMemory
lock LockLevel
readOnly bool
keepWAL bool
syncDir bool
psow bool
}
var (
// Ensure these interfaces are implemented:
_ FileLockState = &vfsFile{}
_ FileHasMoved = &vfsFile{}
_ FileSizeHint = &vfsFile{}
_ FilePersistentWAL = &vfsFile{}
_ FilePowersafeOverwrite = &vfsFile{}
)
func (f *vfsFile) Close() error {
if f.shm != nil {
f.shm.Close()
}
return f.File.Close()
}
func (f *vfsFile) Sync(flags SyncFlag) error {
dataonly := (flags & SYNC_DATAONLY) != 0
fullsync := (flags & 0x0f) == SYNC_FULL
err := osSync(f.File, fullsync, dataonly)
if err != nil {
return err
}
if runtime.GOOS != "windows" && f.syncDir {
f.syncDir = false
d, err := os.Open(filepath.Dir(f.File.Name()))
if err != nil {
return nil
}
defer d.Close()
err = osSync(d, false, false)
if err != nil {
return _IOERR_DIR_FSYNC
}
}
return nil
}
func (f *vfsFile) Size() (int64, error) {
return f.Seek(0, io.SeekEnd)
}
func (f *vfsFile) SectorSize() int {
return _DEFAULT_SECTOR_SIZE
}
func (f *vfsFile) DeviceCharacteristics() DeviceCharacteristic {
var res DeviceCharacteristic
if osBatchAtomic(f.File) {
res |= IOCAP_BATCH_ATOMIC
}
if f.psow {
res |= IOCAP_POWERSAFE_OVERWRITE
}
return res
}
func (f *vfsFile) SizeHint(size int64) error {
return osAllocate(f.File, size)
}
func (f *vfsFile) HasMoved() (bool, error) {
fi, err := f.Stat()
if err != nil {
return false, err
}
pi, err := os.Stat(f.Name())
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
return true, nil
}
return false, err
}
return !os.SameFile(fi, pi), nil
}
func (f *vfsFile) LockState() LockLevel { return f.lock }
func (f *vfsFile) PowersafeOverwrite() bool { return f.psow }
func (f *vfsFile) PersistentWAL() bool { return f.keepWAL }
func (f *vfsFile) SetPowersafeOverwrite(psow bool) { f.psow = psow }
func (f *vfsFile) SetPersistentWAL(keepWAL bool) { f.keepWAL = keepWAL }

174
vendor/github.com/ncruces/go-sqlite3/vfs/filename.go generated vendored Normal file
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package vfs
import (
"context"
"net/url"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/tetratelabs/wazero/api"
)
// Filename is used by SQLite to pass filenames
// to the Open method of a VFS.
//
// https://sqlite.org/c3ref/filename.html
type Filename struct {
ctx context.Context
mod api.Module
zPath uint32
flags OpenFlag
stack [2]uint64
}
// OpenFilename is an internal API users should not call directly.
func OpenFilename(ctx context.Context, mod api.Module, id uint32, flags OpenFlag) *Filename {
if id == 0 {
return nil
}
return &Filename{
ctx: ctx,
mod: mod,
zPath: id,
flags: flags,
}
}
// String returns this filename as a string.
func (n *Filename) String() string {
if n == nil || n.zPath == 0 {
return ""
}
return util.ReadString(n.mod, n.zPath, _MAX_PATHNAME)
}
// Database returns the name of the corresponding database file.
//
// https://sqlite.org/c3ref/filename_database.html
func (n *Filename) Database() string {
return n.path("sqlite3_filename_database")
}
// Journal returns the name of the corresponding rollback journal file.
//
// https://sqlite.org/c3ref/filename_database.html
func (n *Filename) Journal() string {
return n.path("sqlite3_filename_journal")
}
// Journal returns the name of the corresponding WAL file.
//
// https://sqlite.org/c3ref/filename_database.html
func (n *Filename) WAL() string {
return n.path("sqlite3_filename_wal")
}
func (n *Filename) path(method string) string {
if n == nil || n.zPath == 0 {
return ""
}
n.stack[0] = uint64(n.zPath)
fn := n.mod.ExportedFunction(method)
if err := fn.CallWithStack(n.ctx, n.stack[:]); err != nil {
panic(err)
}
return util.ReadString(n.mod, uint32(n.stack[0]), _MAX_PATHNAME)
}
// DatabaseFile returns the main database [File] corresponding to a journal.
//
// https://sqlite.org/c3ref/database_file_object.html
func (n *Filename) DatabaseFile() File {
if n == nil || n.zPath == 0 {
return nil
}
if n.flags&(OPEN_MAIN_DB|OPEN_MAIN_JOURNAL|OPEN_WAL) == 0 {
return nil
}
n.stack[0] = uint64(n.zPath)
fn := n.mod.ExportedFunction("sqlite3_database_file_object")
if err := fn.CallWithStack(n.ctx, n.stack[:]); err != nil {
panic(err)
}
file, _ := vfsFileGet(n.ctx, n.mod, uint32(n.stack[0])).(File)
return file
}
// URIParameter returns the value of a URI parameter.
//
// https://sqlite.org/c3ref/uri_boolean.html
func (n *Filename) URIParameter(key string) string {
if n == nil || n.zPath == 0 {
return ""
}
uriKey := n.mod.ExportedFunction("sqlite3_uri_key")
n.stack[0] = uint64(n.zPath)
n.stack[1] = uint64(0)
if err := uriKey.CallWithStack(n.ctx, n.stack[:]); err != nil {
panic(err)
}
ptr := uint32(n.stack[0])
if ptr == 0 {
return ""
}
// Parse the format from:
// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
// This avoids having to alloc/free the key just to find a value.
for {
k := util.ReadString(n.mod, ptr, _MAX_NAME)
if k == "" {
return ""
}
ptr += uint32(len(k)) + 1
v := util.ReadString(n.mod, ptr, _MAX_NAME)
if k == key {
return v
}
ptr += uint32(len(v)) + 1
}
}
// URIParameters obtains values for URI parameters.
//
// https://sqlite.org/c3ref/uri_boolean.html
func (n *Filename) URIParameters() url.Values {
if n == nil || n.zPath == 0 {
return nil
}
uriKey := n.mod.ExportedFunction("sqlite3_uri_key")
n.stack[0] = uint64(n.zPath)
n.stack[1] = uint64(0)
if err := uriKey.CallWithStack(n.ctx, n.stack[:]); err != nil {
panic(err)
}
ptr := uint32(n.stack[0])
if ptr == 0 {
return nil
}
var params url.Values
// Parse the format from:
// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
// This is the only way to support multiple valued keys.
for {
k := util.ReadString(n.mod, ptr, _MAX_NAME)
if k == "" {
return params
}
ptr += uint32(len(k)) + 1
v := util.ReadString(n.mod, ptr, _MAX_NAME)
if params == nil {
params = url.Values{}
}
params.Add(k, v)
ptr += uint32(len(v)) + 1
}
}

144
vendor/github.com/ncruces/go-sqlite3/vfs/lock.go generated vendored Normal file
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//go:build (linux || darwin || windows || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
package vfs
import "github.com/ncruces/go-sqlite3/internal/util"
// SupportsFileLocking is false on platforms that do not support file locking.
// To open a database file on those platforms,
// you need to use the [nolock] or [immutable] URI parameters.
//
// [nolock]: https://sqlite.org/uri.html#urinolock
// [immutable]: https://sqlite.org/uri.html#uriimmutable
const SupportsFileLocking = true
const (
_PENDING_BYTE = 0x40000000
_RESERVED_BYTE = (_PENDING_BYTE + 1)
_SHARED_FIRST = (_PENDING_BYTE + 2)
_SHARED_SIZE = 510
)
func (f *vfsFile) Lock(lock LockLevel) error {
// Argument check. SQLite never explicitly requests a pending lock.
if lock != LOCK_SHARED && lock != LOCK_RESERVED && lock != LOCK_EXCLUSIVE {
panic(util.AssertErr())
}
switch {
case f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE:
// Connection state check.
panic(util.AssertErr())
case f.lock == LOCK_NONE && lock > LOCK_SHARED:
// We never move from unlocked to anything higher than a shared lock.
panic(util.AssertErr())
case f.lock != LOCK_SHARED && lock == LOCK_RESERVED:
// A shared lock is always held when a reserved lock is requested.
panic(util.AssertErr())
}
// If we already have an equal or more restrictive lock, do nothing.
if f.lock >= lock {
return nil
}
// Do not allow any kind of write-lock on a read-only database.
if f.readOnly && lock >= LOCK_RESERVED {
return _IOERR_LOCK
}
switch lock {
case LOCK_SHARED:
// Must be unlocked to get SHARED.
if f.lock != LOCK_NONE {
panic(util.AssertErr())
}
if rc := osGetSharedLock(f.File); rc != _OK {
return rc
}
f.lock = LOCK_SHARED
return nil
case LOCK_RESERVED:
// Must be SHARED to get RESERVED.
if f.lock != LOCK_SHARED {
panic(util.AssertErr())
}
if rc := osGetReservedLock(f.File); rc != _OK {
return rc
}
f.lock = LOCK_RESERVED
return nil
case LOCK_EXCLUSIVE:
// Must be SHARED, RESERVED or PENDING to get EXCLUSIVE.
if f.lock <= LOCK_NONE || f.lock >= LOCK_EXCLUSIVE {
panic(util.AssertErr())
}
reserved := f.lock == LOCK_RESERVED
// A PENDING lock is needed before acquiring an EXCLUSIVE lock.
if f.lock < LOCK_PENDING {
// If we're already RESERVED, we can block indefinitely,
// since only new readers may briefly hold the PENDING lock.
if rc := osGetPendingLock(f.File, reserved /* block */); rc != _OK {
return rc
}
f.lock = LOCK_PENDING
}
// We already have PENDING, so we're just waiting for readers to leave.
// If we were RESERVED, we can wait for a little while, before invoking
// the busy handler; we will only do this once.
if rc := osGetExclusiveLock(f.File, reserved /* wait */); rc != _OK {
return rc
}
f.lock = LOCK_EXCLUSIVE
return nil
default:
panic(util.AssertErr())
}
}
func (f *vfsFile) Unlock(lock LockLevel) error {
// Argument check.
if lock != LOCK_NONE && lock != LOCK_SHARED {
panic(util.AssertErr())
}
// Connection state check.
if f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE {
panic(util.AssertErr())
}
// If we don't have a more restrictive lock, do nothing.
if f.lock <= lock {
return nil
}
switch lock {
case LOCK_SHARED:
rc := osDowngradeLock(f.File, f.lock)
f.lock = LOCK_SHARED
return rc
case LOCK_NONE:
rc := osReleaseLock(f.File, f.lock)
f.lock = LOCK_NONE
return rc
default:
panic(util.AssertErr())
}
}
func (f *vfsFile) CheckReservedLock() (bool, error) {
// Connection state check.
if f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE {
panic(util.AssertErr())
}
if f.lock >= LOCK_RESERVED {
return true, nil
}
return osCheckReservedLock(f.File)
}

23
vendor/github.com/ncruces/go-sqlite3/vfs/lock_other.go generated vendored Normal file
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//go:build !(linux || darwin || windows || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) || sqlite3_nosys
package vfs
// SupportsFileLocking is false on platforms that do not support file locking.
// To open a database file on those platforms,
// you need to use the [nolock] or [immutable] URI parameters.
//
// [nolock]: https://sqlite.org/uri.html#urinolock
// [immutable]: https://sqlite.org/uri.html#uriimmutable
const SupportsFileLocking = false
func (f *vfsFile) Lock(LockLevel) error {
return _IOERR_LOCK
}
func (f *vfsFile) Unlock(LockLevel) error {
return _IOERR_UNLOCK
}
func (f *vfsFile) CheckReservedLock() (bool, error) {
return false, _IOERR_CHECKRESERVEDLOCK
}

9
vendor/github.com/ncruces/go-sqlite3/vfs/memdb/README.md generated vendored Normal file
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# Go `"memdb"` SQLite VFS
This package implements the [`"memdb"`](https://sqlite.org/src/doc/tip/src/memdb.c)
SQLite VFS in pure Go.
It has some benefits over the C version:
- the memory backing the database needs not be contiguous,
- the database can grow/shrink incrementally without copying,
- reader-writer concurrency is slightly improved.

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vendor/github.com/ncruces/go-sqlite3/vfs/memdb/api.go generated vendored Normal file
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// Package memdb implements the "memdb" SQLite VFS.
//
// The "memdb" [vfs.VFS] allows the same in-memory database to be shared
// among multiple database connections in the same process,
// as long as the database name begins with "/".
//
// Importing package memdb registers the VFS:
//
// import _ "github.com/ncruces/go-sqlite3/vfs/memdb"
package memdb
import (
"sync"
"github.com/ncruces/go-sqlite3/vfs"
)
func init() {
vfs.Register("memdb", memVFS{})
}
var (
memoryMtx sync.Mutex
// +checklocks:memoryMtx
memoryDBs = map[string]*memDB{}
)
// Create creates a shared memory database,
// using data as its initial contents.
// The new database takes ownership of data,
// and the caller should not use data after this call.
func Create(name string, data []byte) {
memoryMtx.Lock()
defer memoryMtx.Unlock()
db := &memDB{
refs: 1,
name: name,
size: int64(len(data)),
}
// Convert data from WAL to rollback journal.
if len(data) >= 20 && data[18] == 2 && data[19] == 2 {
data[18] = 1
data[19] = 1
}
sectors := divRoundUp(db.size, sectorSize)
db.data = make([]*[sectorSize]byte, sectors)
for i := range db.data {
sector := data[i*sectorSize:]
if len(sector) >= sectorSize {
db.data[i] = (*[sectorSize]byte)(sector)
} else {
db.data[i] = new([sectorSize]byte)
copy((*db.data[i])[:], sector)
}
}
memoryDBs[name] = db
}
// Delete deletes a shared memory database.
func Delete(name string) {
memoryMtx.Lock()
defer memoryMtx.Unlock()
delete(memoryDBs, name)
}

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vendor/github.com/ncruces/go-sqlite3/vfs/memdb/memdb.go generated vendored Normal file
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package memdb
import (
"io"
"runtime"
"sync"
"time"
"github.com/ncruces/go-sqlite3"
"github.com/ncruces/go-sqlite3/vfs"
)
// Must be a multiple of 64K (the largest page size).
const sectorSize = 65536
type memVFS struct{}
func (memVFS) Open(name string, flags vfs.OpenFlag) (vfs.File, vfs.OpenFlag, error) {
// For simplicity, we do not support reading or writing data
// across "sector" boundaries.
//
// This is not a problem for most SQLite file types:
// - databases, which only do page aligned reads/writes;
// - temp journals, as used by the sorter, which does the same:
// https://github.com/sqlite/sqlite/blob/b74eb0/src/vdbesort.c#L409-L412
//
// We refuse to open all other file types,
// but returning OPEN_MEMORY means SQLite won't ask us to.
const types = vfs.OPEN_MAIN_DB |
vfs.OPEN_TEMP_DB |
vfs.OPEN_TEMP_JOURNAL
if flags&types == 0 {
return nil, flags, sqlite3.CANTOPEN
}
// A shared database has a name that begins with "/".
shared := len(name) > 1 && name[0] == '/'
var db *memDB
if shared {
name = name[1:]
memoryMtx.Lock()
defer memoryMtx.Unlock()
db = memoryDBs[name]
}
if db == nil {
if flags&vfs.OPEN_CREATE == 0 {
return nil, flags, sqlite3.CANTOPEN
}
db = &memDB{name: name}
}
if shared {
db.refs++ // +checklocksforce: memoryMtx is held
memoryDBs[name] = db
}
return &memFile{
memDB: db,
readOnly: flags&vfs.OPEN_READONLY != 0,
}, flags | vfs.OPEN_MEMORY, nil
}
func (memVFS) Delete(name string, dirSync bool) error {
return sqlite3.IOERR_DELETE
}
func (memVFS) Access(name string, flag vfs.AccessFlag) (bool, error) {
return false, nil
}
func (memVFS) FullPathname(name string) (string, error) {
return name, nil
}
type memDB struct {
name string
// +checklocks:lockMtx
pending *memFile
// +checklocks:lockMtx
reserved *memFile
// +checklocks:dataMtx
data []*[sectorSize]byte
// +checklocks:dataMtx
size int64
// +checklocks:lockMtx
shared int
// +checklocks:memoryMtx
refs int
lockMtx sync.Mutex
dataMtx sync.RWMutex
}
func (m *memDB) release() {
memoryMtx.Lock()
defer memoryMtx.Unlock()
if m.refs--; m.refs == 0 && m == memoryDBs[m.name] {
delete(memoryDBs, m.name)
}
}
type memFile struct {
*memDB
lock vfs.LockLevel
readOnly bool
}
var (
// Ensure these interfaces are implemented:
_ vfs.FileLockState = &memFile{}
_ vfs.FileSizeHint = &memFile{}
)
func (m *memFile) Close() error {
m.release()
return m.Unlock(vfs.LOCK_NONE)
}
func (m *memFile) ReadAt(b []byte, off int64) (n int, err error) {
m.dataMtx.RLock()
defer m.dataMtx.RUnlock()
if off >= m.size {
return 0, io.EOF
}
base := off / sectorSize
rest := off % sectorSize
have := int64(sectorSize)
if base == int64(len(m.data))-1 {
have = modRoundUp(m.size, sectorSize)
}
n = copy(b, (*m.data[base])[rest:have])
if n < len(b) {
// Assume reads are page aligned.
return 0, io.ErrNoProgress
}
return n, nil
}
func (m *memFile) WriteAt(b []byte, off int64) (n int, err error) {
m.dataMtx.Lock()
defer m.dataMtx.Unlock()
base := off / sectorSize
rest := off % sectorSize
for base >= int64(len(m.data)) {
m.data = append(m.data, new([sectorSize]byte))
}
n = copy((*m.data[base])[rest:], b)
if n < len(b) {
// Assume writes are page aligned.
return n, io.ErrShortWrite
}
if size := off + int64(len(b)); size > m.size {
m.size = size
}
return n, nil
}
func (m *memFile) Truncate(size int64) error {
m.dataMtx.Lock()
defer m.dataMtx.Unlock()
return m.truncate(size)
}
// +checklocks:m.dataMtx
func (m *memFile) truncate(size int64) error {
if size < m.size {
base := size / sectorSize
rest := size % sectorSize
if rest != 0 {
clear((*m.data[base])[rest:])
}
}
sectors := divRoundUp(size, sectorSize)
for sectors > int64(len(m.data)) {
m.data = append(m.data, new([sectorSize]byte))
}
clear(m.data[sectors:])
m.data = m.data[:sectors]
m.size = size
return nil
}
func (m *memFile) Sync(flag vfs.SyncFlag) error {
return nil
}
func (m *memFile) Size() (int64, error) {
m.dataMtx.RLock()
defer m.dataMtx.RUnlock()
return m.size, nil
}
const spinWait = 25 * time.Microsecond
func (m *memFile) Lock(lock vfs.LockLevel) error {
if m.lock >= lock {
return nil
}
if m.readOnly && lock >= vfs.LOCK_RESERVED {
return sqlite3.IOERR_LOCK
}
m.lockMtx.Lock()
defer m.lockMtx.Unlock()
switch lock {
case vfs.LOCK_SHARED:
if m.pending != nil {
return sqlite3.BUSY
}
m.shared++
case vfs.LOCK_RESERVED:
if m.reserved != nil {
return sqlite3.BUSY
}
m.reserved = m
case vfs.LOCK_EXCLUSIVE:
if m.lock < vfs.LOCK_PENDING {
if m.pending != nil {
return sqlite3.BUSY
}
m.lock = vfs.LOCK_PENDING
m.pending = m
}
for before := time.Now(); m.shared > 1; {
if time.Since(before) > spinWait {
return sqlite3.BUSY
}
m.lockMtx.Unlock()
runtime.Gosched()
m.lockMtx.Lock()
}
}
m.lock = lock
return nil
}
func (m *memFile) Unlock(lock vfs.LockLevel) error {
if m.lock <= lock {
return nil
}
m.lockMtx.Lock()
defer m.lockMtx.Unlock()
if m.pending == m {
m.pending = nil
}
if m.reserved == m {
m.reserved = nil
}
if lock < vfs.LOCK_SHARED {
m.shared--
}
m.lock = lock
return nil
}
func (m *memFile) CheckReservedLock() (bool, error) {
if m.lock >= vfs.LOCK_RESERVED {
return true, nil
}
m.lockMtx.Lock()
defer m.lockMtx.Unlock()
return m.reserved != nil, nil
}
func (m *memFile) SectorSize() int {
return sectorSize
}
func (m *memFile) DeviceCharacteristics() vfs.DeviceCharacteristic {
return vfs.IOCAP_ATOMIC |
vfs.IOCAP_SEQUENTIAL |
vfs.IOCAP_SAFE_APPEND |
vfs.IOCAP_POWERSAFE_OVERWRITE
}
func (m *memFile) SizeHint(size int64) error {
m.dataMtx.Lock()
defer m.dataMtx.Unlock()
if size > m.size {
return m.truncate(size)
}
return nil
}
func (m *memFile) LockState() vfs.LockLevel {
return m.lock
}
func divRoundUp(a, b int64) int64 {
return (a + b - 1) / b
}
func modRoundUp(a, b int64) int64 {
return b - (b-a%b)%b
}

33
vendor/github.com/ncruces/go-sqlite3/vfs/os_bsd.go generated vendored Normal file
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//go:build (freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
package vfs
import (
"os"
"time"
"golang.org/x/sys/unix"
)
func osUnlock(file *os.File, start, len int64) _ErrorCode {
if start == 0 && len == 0 {
err := unix.Flock(int(file.Fd()), unix.LOCK_UN)
if err != nil {
return _IOERR_UNLOCK
}
}
return _OK
}
func osLock(file *os.File, how int, def _ErrorCode) _ErrorCode {
err := unix.Flock(int(file.Fd()), how)
return osLockErrorCode(err, def)
}
func osReadLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
return osLock(file, unix.LOCK_SH|unix.LOCK_NB, _IOERR_RDLOCK)
}
func osWriteLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
return osLock(file, unix.LOCK_EX|unix.LOCK_NB, _IOERR_LOCK)
}

95
vendor/github.com/ncruces/go-sqlite3/vfs/os_darwin.go generated vendored Normal file
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@ -0,0 +1,95 @@
//go:build !(sqlite3_flock || sqlite3_nosys)
package vfs
import (
"io"
"os"
"time"
"golang.org/x/sys/unix"
)
const (
// https://github.com/apple/darwin-xnu/blob/main/bsd/sys/fcntl.h
_F_OFD_SETLK = 90
_F_OFD_SETLKW = 91
_F_OFD_SETLKWTIMEOUT = 93
)
type flocktimeout_t struct {
fl unix.Flock_t
timeout unix.Timespec
}
func osSync(file *os.File, fullsync, _ /*dataonly*/ bool) error {
if fullsync {
return file.Sync()
}
return unix.Fsync(int(file.Fd()))
}
func osAllocate(file *os.File, size int64) error {
off, err := file.Seek(0, io.SeekEnd)
if err != nil {
return err
}
if size <= off {
return nil
}
store := unix.Fstore_t{
Flags: unix.F_ALLOCATEALL | unix.F_ALLOCATECONTIG,
Posmode: unix.F_PEOFPOSMODE,
Offset: 0,
Length: size - off,
}
// Try to get a continuous chunk of disk space.
err = unix.FcntlFstore(file.Fd(), unix.F_PREALLOCATE, &store)
if err != nil {
// OK, perhaps we are too fragmented, allocate non-continuous.
store.Flags = unix.F_ALLOCATEALL
unix.FcntlFstore(file.Fd(), unix.F_PREALLOCATE, &store)
}
return file.Truncate(size)
}
func osUnlock(file *os.File, start, len int64) _ErrorCode {
err := unix.FcntlFlock(file.Fd(), _F_OFD_SETLK, &unix.Flock_t{
Type: unix.F_UNLCK,
Start: start,
Len: len,
})
if err != nil {
return _IOERR_UNLOCK
}
return _OK
}
func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, def _ErrorCode) _ErrorCode {
lock := flocktimeout_t{fl: unix.Flock_t{
Type: typ,
Start: start,
Len: len,
}}
var err error
switch {
case timeout == 0:
err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLK, &lock.fl)
case timeout < 0:
err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLKW, &lock.fl)
default:
lock.timeout = unix.NsecToTimespec(int64(timeout / time.Nanosecond))
err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLKWTIMEOUT, &lock.fl)
}
return osLockErrorCode(err, def)
}
func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
}
func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
}

34
vendor/github.com/ncruces/go-sqlite3/vfs/os_f2fs_linux.go generated vendored Normal file
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@ -0,0 +1,34 @@
//go:build (amd64 || arm64 || riscv64) && !sqlite3_nosys
package vfs
import (
"os"
"golang.org/x/sys/unix"
)
const (
_F2FS_IOC_START_ATOMIC_WRITE = 62721
_F2FS_IOC_COMMIT_ATOMIC_WRITE = 62722
_F2FS_IOC_ABORT_ATOMIC_WRITE = 62725
_F2FS_IOC_GET_FEATURES = 2147808524
_F2FS_FEATURE_ATOMIC_WRITE = 4
)
func osBatchAtomic(file *os.File) bool {
flags, err := unix.IoctlGetInt(int(file.Fd()), _F2FS_IOC_GET_FEATURES)
return err == nil && flags&_F2FS_FEATURE_ATOMIC_WRITE != 0
}
func (f *vfsFile) BeginAtomicWrite() error {
return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_START_ATOMIC_WRITE, 0)
}
func (f *vfsFile) CommitAtomicWrite() error {
return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_COMMIT_ATOMIC_WRITE, 0)
}
func (f *vfsFile) RollbackAtomicWrite() error {
return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_ABORT_ATOMIC_WRITE, 0)
}

71
vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go generated vendored Normal file
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@ -0,0 +1,71 @@
//go:build !(sqlite3_flock || sqlite3_nosys)
package vfs
import (
"math/rand"
"os"
"time"
"golang.org/x/sys/unix"
)
func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
// SQLite trusts Linux's fdatasync for all fsync's.
return unix.Fdatasync(int(file.Fd()))
}
func osAllocate(file *os.File, size int64) error {
if size == 0 {
return nil
}
return unix.Fallocate(int(file.Fd()), 0, 0, size)
}
func osUnlock(file *os.File, start, len int64) _ErrorCode {
err := unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &unix.Flock_t{
Type: unix.F_UNLCK,
Start: start,
Len: len,
})
if err != nil {
return _IOERR_UNLOCK
}
return _OK
}
func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, def _ErrorCode) _ErrorCode {
lock := unix.Flock_t{
Type: typ,
Start: start,
Len: len,
}
var err error
switch {
case timeout == 0:
err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
case timeout < 0:
err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLKW, &lock)
default:
before := time.Now()
for {
err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
if errno, _ := err.(unix.Errno); errno != unix.EAGAIN {
break
}
if timeout < time.Since(before) {
break
}
osSleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
}
}
return osLockErrorCode(err, def)
}
func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
}
func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
}

36
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_access.go generated vendored Normal file
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@ -0,0 +1,36 @@
//go:build !unix || sqlite3_nosys
package vfs
import (
"io/fs"
"os"
)
func osAccess(path string, flags AccessFlag) error {
fi, err := os.Stat(path)
if err != nil {
return err
}
if flags == ACCESS_EXISTS {
return nil
}
const (
S_IREAD = 0400
S_IWRITE = 0200
S_IEXEC = 0100
)
var want fs.FileMode = S_IREAD
if flags == ACCESS_READWRITE {
want |= S_IWRITE
}
if fi.IsDir() {
want |= S_IEXEC
}
if fi.Mode()&want != want {
return fs.ErrPermission
}
return nil
}

19
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_alloc.go generated vendored Normal file
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@ -0,0 +1,19 @@
//go:build !(linux || darwin) || sqlite3_flock || sqlite3_nosys
package vfs
import (
"io"
"os"
)
func osAllocate(file *os.File, size int64) error {
off, err := file.Seek(0, io.SeekEnd)
if err != nil {
return err
}
if size <= off {
return nil
}
return file.Truncate(size)
}

9
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_atomic.go generated vendored Normal file
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@ -0,0 +1,9 @@
//go:build !linux || !(amd64 || arm64 || riscv64) || sqlite3_nosys
package vfs
import "os"
func osBatchAtomic(*os.File) bool {
return false
}

14
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_mode.go generated vendored Normal file
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@ -0,0 +1,14 @@
//go:build !unix || sqlite3_nosys
package vfs
import "os"
func osSetMode(file *os.File, modeof string) error {
fi, err := os.Stat(modeof)
if err != nil {
return err
}
file.Chmod(fi.Mode())
return nil
}

9
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_sleep.go generated vendored Normal file
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@ -0,0 +1,9 @@
//go:build !windows || sqlite3_nosys
package vfs
import "time"
func osSleep(d time.Duration) {
time.Sleep(d)
}

9
vendor/github.com/ncruces/go-sqlite3/vfs/os_std_sync.go generated vendored Normal file
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@ -0,0 +1,9 @@
//go:build !(linux || darwin) || sqlite3_flock || sqlite3_nosys
package vfs
import "os"
func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
return file.Sync()
}

33
vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go generated vendored Normal file
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@ -0,0 +1,33 @@
//go:build unix && !sqlite3_nosys
package vfs
import (
"os"
"syscall"
"golang.org/x/sys/unix"
)
func osAccess(path string, flags AccessFlag) error {
var access uint32 // unix.F_OK
switch flags {
case ACCESS_READWRITE:
access = unix.R_OK | unix.W_OK
case ACCESS_READ:
access = unix.R_OK
}
return unix.Access(path, access)
}
func osSetMode(file *os.File, modeof string) error {
fi, err := os.Stat(modeof)
if err != nil {
return err
}
file.Chmod(fi.Mode())
if sys, ok := fi.Sys().(*syscall.Stat_t); ok {
file.Chown(int(sys.Uid), int(sys.Gid))
}
return nil
}

106
vendor/github.com/ncruces/go-sqlite3/vfs/os_unix_lock.go generated vendored Normal file
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@ -0,0 +1,106 @@
//go:build (linux || darwin || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
package vfs
import (
"os"
"time"
"golang.org/x/sys/unix"
)
func osGetSharedLock(file *os.File) _ErrorCode {
// Test the PENDING lock before acquiring a new SHARED lock.
if lock, _ := osGetLock(file, _PENDING_BYTE, 1); lock == unix.F_WRLCK {
return _BUSY
}
// Acquire the SHARED lock.
return osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
}
func osGetReservedLock(file *os.File) _ErrorCode {
// Acquire the RESERVED lock.
return osWriteLock(file, _RESERVED_BYTE, 1, 0)
}
func osGetPendingLock(file *os.File, block bool) _ErrorCode {
var timeout time.Duration
if block {
timeout = -1
}
// Acquire the PENDING lock.
return osWriteLock(file, _PENDING_BYTE, 1, timeout)
}
func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
var timeout time.Duration
if wait {
timeout = time.Millisecond
}
// Acquire the EXCLUSIVE lock.
return osWriteLock(file, _SHARED_FIRST, _SHARED_SIZE, timeout)
}
func osDowngradeLock(file *os.File, state LockLevel) _ErrorCode {
if state >= LOCK_EXCLUSIVE {
// Downgrade to a SHARED lock.
if rc := osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0); rc != _OK {
// In theory, the downgrade to a SHARED cannot fail because another
// process is holding an incompatible lock. If it does, this
// indicates that the other process is not following the locking
// protocol. If this happens, return _IOERR_RDLOCK. Returning
// BUSY would confuse the upper layer.
return _IOERR_RDLOCK
}
}
// Release the PENDING and RESERVED locks.
return osUnlock(file, _PENDING_BYTE, 2)
}
func osReleaseLock(file *os.File, _ LockLevel) _ErrorCode {
// Release all locks.
return osUnlock(file, 0, 0)
}
func osCheckReservedLock(file *os.File) (bool, _ErrorCode) {
// Test the RESERVED lock.
lock, rc := osGetLock(file, _RESERVED_BYTE, 1)
return lock == unix.F_WRLCK, rc
}
func osGetLock(file *os.File, start, len int64) (int16, _ErrorCode) {
lock := unix.Flock_t{
Type: unix.F_WRLCK,
Start: start,
Len: len,
}
if unix.FcntlFlock(file.Fd(), unix.F_GETLK, &lock) != nil {
return 0, _IOERR_CHECKRESERVEDLOCK
}
return lock.Type, _OK
}
func osLockErrorCode(err error, def _ErrorCode) _ErrorCode {
if err == nil {
return _OK
}
if errno, ok := err.(unix.Errno); ok {
switch errno {
case
unix.EACCES,
unix.EAGAIN,
unix.EBUSY,
unix.EINTR,
unix.ENOLCK,
unix.EDEADLK,
unix.ETIMEDOUT:
return _BUSY
case unix.EPERM:
return _PERM
}
if errno == unix.EWOULDBLOCK && unix.EWOULDBLOCK != unix.EAGAIN {
return _BUSY
}
}
return def
}

186
vendor/github.com/ncruces/go-sqlite3/vfs/os_windows.go generated vendored Normal file
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@ -0,0 +1,186 @@
//go:build !sqlite3_nosys
package vfs
import (
"math/rand"
"os"
"time"
"golang.org/x/sys/windows"
)
func osGetSharedLock(file *os.File) _ErrorCode {
// Acquire the PENDING lock temporarily before acquiring a new SHARED lock.
rc := osReadLock(file, _PENDING_BYTE, 1, 0)
if rc == _OK {
// Acquire the SHARED lock.
rc = osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
// Release the PENDING lock.
osUnlock(file, _PENDING_BYTE, 1)
}
return rc
}
func osGetReservedLock(file *os.File) _ErrorCode {
// Acquire the RESERVED lock.
return osWriteLock(file, _RESERVED_BYTE, 1, 0)
}
func osGetPendingLock(file *os.File, block bool) _ErrorCode {
var timeout time.Duration
if block {
timeout = -1
}
// Acquire the PENDING lock.
return osWriteLock(file, _PENDING_BYTE, 1, timeout)
}
func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
var timeout time.Duration
if wait {
timeout = time.Millisecond
}
// Release the SHARED lock.
osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
// Acquire the EXCLUSIVE lock.
rc := osWriteLock(file, _SHARED_FIRST, _SHARED_SIZE, timeout)
if rc != _OK {
// Reacquire the SHARED lock.
osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
}
return rc
}
func osDowngradeLock(file *os.File, state LockLevel) _ErrorCode {
if state >= LOCK_EXCLUSIVE {
// Release the EXCLUSIVE lock.
osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
// Reacquire the SHARED lock.
if rc := osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0); rc != _OK {
// This should never happen.
// We should always be able to reacquire the read lock.
return _IOERR_RDLOCK
}
}
// Release the PENDING and RESERVED locks.
if state >= LOCK_RESERVED {
osUnlock(file, _RESERVED_BYTE, 1)
}
if state >= LOCK_PENDING {
osUnlock(file, _PENDING_BYTE, 1)
}
return _OK
}
func osReleaseLock(file *os.File, state LockLevel) _ErrorCode {
// Release all locks.
if state >= LOCK_RESERVED {
osUnlock(file, _RESERVED_BYTE, 1)
}
if state >= LOCK_SHARED {
osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
}
if state >= LOCK_PENDING {
osUnlock(file, _PENDING_BYTE, 1)
}
return _OK
}
func osCheckReservedLock(file *os.File) (bool, _ErrorCode) {
// Test the RESERVED lock.
rc := osLock(file, 0, _RESERVED_BYTE, 1, 0, _IOERR_CHECKRESERVEDLOCK)
if rc == _BUSY {
return true, _OK
}
if rc == _OK {
// Release the RESERVED lock.
osUnlock(file, _RESERVED_BYTE, 1)
}
return false, rc
}
func osUnlock(file *os.File, start, len uint32) _ErrorCode {
err := windows.UnlockFileEx(windows.Handle(file.Fd()),
0, len, 0, &windows.Overlapped{Offset: start})
if err == windows.ERROR_NOT_LOCKED {
return _OK
}
if err != nil {
return _IOERR_UNLOCK
}
return _OK
}
func osLock(file *os.File, flags, start, len uint32, timeout time.Duration, def _ErrorCode) _ErrorCode {
var err error
switch {
case timeout == 0:
err = osLockEx(file, flags|windows.LOCKFILE_FAIL_IMMEDIATELY, start, len)
case timeout < 0:
err = osLockEx(file, flags, start, len)
default:
before := time.Now()
for {
err = osLockEx(file, flags|windows.LOCKFILE_FAIL_IMMEDIATELY, start, len)
if errno, _ := err.(windows.Errno); errno != windows.ERROR_LOCK_VIOLATION {
break
}
if timeout < time.Since(before) {
break
}
osSleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
}
}
return osLockErrorCode(err, def)
}
func osLockEx(file *os.File, flags, start, len uint32) error {
return windows.LockFileEx(windows.Handle(file.Fd()), flags,
0, len, 0, &windows.Overlapped{Offset: start})
}
func osReadLock(file *os.File, start, len uint32, timeout time.Duration) _ErrorCode {
return osLock(file, 0, start, len, timeout, _IOERR_RDLOCK)
}
func osWriteLock(file *os.File, start, len uint32, timeout time.Duration) _ErrorCode {
return osLock(file, windows.LOCKFILE_EXCLUSIVE_LOCK, start, len, timeout, _IOERR_LOCK)
}
func osLockErrorCode(err error, def _ErrorCode) _ErrorCode {
if err == nil {
return _OK
}
if errno, ok := err.(windows.Errno); ok {
// https://devblogs.microsoft.com/oldnewthing/20140905-00/?p=63
switch errno {
case
windows.ERROR_LOCK_VIOLATION,
windows.ERROR_IO_PENDING,
windows.ERROR_OPERATION_ABORTED:
return _BUSY
}
}
return def
}
func osSleep(d time.Duration) {
if d > 0 {
period := max(1, d/(5*time.Millisecond))
if period < 16 {
windows.TimeBeginPeriod(uint32(period))
}
time.Sleep(d)
if period < 16 {
windows.TimeEndPeriod(uint32(period))
}
}
}

48
vendor/github.com/ncruces/go-sqlite3/vfs/registry.go generated vendored Normal file
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@ -0,0 +1,48 @@
package vfs
import "sync"
var (
// +checklocks:vfsRegistryMtx
vfsRegistry map[string]VFS
vfsRegistryMtx sync.RWMutex
)
// Find returns a VFS given its name.
// If there is no match, nil is returned.
// If name is empty, the default VFS is returned.
//
// https://sqlite.org/c3ref/vfs_find.html
func Find(name string) VFS {
if name == "" || name == "os" {
return vfsOS{}
}
vfsRegistryMtx.RLock()
defer vfsRegistryMtx.RUnlock()
return vfsRegistry[name]
}
// Register registers a VFS.
// Empty and "os" are reserved names.
//
// https://sqlite.org/c3ref/vfs_find.html
func Register(name string, vfs VFS) {
if name == "" || name == "os" {
return
}
vfsRegistryMtx.Lock()
defer vfsRegistryMtx.Unlock()
if vfsRegistry == nil {
vfsRegistry = map[string]VFS{}
}
vfsRegistry[name] = vfs
}
// Unregister unregisters a VFS.
//
// https://sqlite.org/c3ref/vfs_find.html
func Unregister(name string) {
vfsRegistryMtx.Lock()
defer vfsRegistryMtx.Unlock()
delete(vfsRegistry, name)
}

173
vendor/github.com/ncruces/go-sqlite3/vfs/shm.go generated vendored Normal file
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@ -0,0 +1,173 @@
//go:build (darwin || linux) && (amd64 || arm64 || riscv64) && !(sqlite3_flock || sqlite3_noshm || sqlite3_nosys)
package vfs
import (
"context"
"io"
"os"
"github.com/ncruces/go-sqlite3/internal/util"
"github.com/tetratelabs/wazero/api"
"golang.org/x/sys/unix"
)
// SupportsSharedMemory is false on platforms that do not support shared memory.
// To use [WAL without shared-memory], you need to set [EXCLUSIVE locking mode].
//
// [WAL without shared-memory]: https://sqlite.org/wal.html#noshm
// [EXCLUSIVE locking mode]: https://sqlite.org/pragma.html#pragma_locking_mode
const SupportsSharedMemory = true
const (
_SHM_NLOCK = 8
_SHM_BASE = 120
_SHM_DMS = _SHM_BASE + _SHM_NLOCK
)
func (f *vfsFile) SharedMemory() SharedMemory { return f.shm }
// NewSharedMemory returns a shared-memory WAL-index
// backed by a file with the given path.
// It will return nil if shared-memory is not supported,
// or not appropriate for the given flags.
// Only [OPEN_MAIN_DB] databases may need a WAL-index.
// You must ensure all concurrent accesses to a database
// use shared-memory instances created with the same path.
func NewSharedMemory(path string, flags OpenFlag) SharedMemory {
if flags&OPEN_MAIN_DB == 0 || flags&(OPEN_DELETEONCLOSE|OPEN_MEMORY) != 0 {
return nil
}
return &vfsShm{
path: path,
readOnly: flags&OPEN_READONLY != 0,
}
}
type vfsShm struct {
*os.File
path string
regions []*util.MappedRegion
readOnly bool
}
func (s *vfsShm) shmMap(ctx context.Context, mod api.Module, id, size int32, extend bool) (uint32, error) {
// Ensure size is a multiple of the OS page size.
if int(size)&(unix.Getpagesize()-1) != 0 {
return 0, _IOERR_SHMMAP
}
if s.File == nil {
var flag int
if s.readOnly {
flag = unix.O_RDONLY
} else {
flag = unix.O_RDWR
}
f, err := os.OpenFile(s.path,
flag|unix.O_CREAT|unix.O_NOFOLLOW, 0666)
if err != nil {
return 0, _CANTOPEN
}
s.File = f
}
// Dead man's switch.
if lock, rc := osGetLock(s.File, _SHM_DMS, 1); rc != _OK {
return 0, _IOERR_LOCK
} else if lock == unix.F_WRLCK {
return 0, _BUSY
} else if lock == unix.F_UNLCK {
if s.readOnly {
return 0, _READONLY_CANTINIT
}
if rc := osWriteLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
return 0, rc
}
if err := s.Truncate(0); err != nil {
return 0, _IOERR_SHMOPEN
}
}
if rc := osReadLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
return 0, rc
}
// Check if file is big enough.
o, err := s.Seek(0, io.SeekEnd)
if err != nil {
return 0, _IOERR_SHMSIZE
}
if n := (int64(id) + 1) * int64(size); n > o {
if !extend {
return 0, nil
}
err := osAllocate(s.File, n)
if err != nil {
return 0, _IOERR_SHMSIZE
}
}
var prot int
if s.readOnly {
prot = unix.PROT_READ
} else {
prot = unix.PROT_READ | unix.PROT_WRITE
}
r, err := util.MapRegion(ctx, mod, s.File, int64(id)*int64(size), size, prot)
if err != nil {
return 0, err
}
s.regions = append(s.regions, r)
return r.Ptr, nil
}
func (s *vfsShm) shmLock(offset, n int32, flags _ShmFlag) error {
// Argument check.
if n <= 0 || offset < 0 || offset+n > _SHM_NLOCK {
panic(util.AssertErr())
}
switch flags {
case
_SHM_LOCK | _SHM_SHARED,
_SHM_LOCK | _SHM_EXCLUSIVE,
_SHM_UNLOCK | _SHM_SHARED,
_SHM_UNLOCK | _SHM_EXCLUSIVE:
//
default:
panic(util.AssertErr())
}
if n != 1 && flags&_SHM_EXCLUSIVE == 0 {
panic(util.AssertErr())
}
switch {
case flags&_SHM_UNLOCK != 0:
return osUnlock(s.File, _SHM_BASE+int64(offset), int64(n))
case flags&_SHM_SHARED != 0:
return osReadLock(s.File, _SHM_BASE+int64(offset), int64(n), 0)
case flags&_SHM_EXCLUSIVE != 0:
return osWriteLock(s.File, _SHM_BASE+int64(offset), int64(n), 0)
default:
panic(util.AssertErr())
}
}
func (s *vfsShm) shmUnmap(delete bool) {
if s.File == nil {
return
}
// Unmap regions.
for _, r := range s.regions {
r.Unmap()
}
clear(s.regions)
s.regions = s.regions[:0]
// Close the file.
defer s.Close()
if delete {
os.Remove(s.Name())
}
s.File = nil
}

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