mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 14:40:42 +01:00
2dc9fc1626
* start moving to bun * changing more stuff * more * and yet more * tests passing * seems stable now * more big changes * small fix * little fixes
142 lines
2.1 KiB
Go
142 lines
2.1 KiB
Go
package parser
|
|
|
|
import (
|
|
"bytes"
|
|
"strconv"
|
|
|
|
"github.com/uptrace/bun/internal"
|
|
)
|
|
|
|
type Parser struct {
|
|
b []byte
|
|
i int
|
|
}
|
|
|
|
func New(b []byte) *Parser {
|
|
return &Parser{
|
|
b: b,
|
|
}
|
|
}
|
|
|
|
func NewString(s string) *Parser {
|
|
return New(internal.Bytes(s))
|
|
}
|
|
|
|
func (p *Parser) Valid() bool {
|
|
return p.i < len(p.b)
|
|
}
|
|
|
|
func (p *Parser) Bytes() []byte {
|
|
return p.b[p.i:]
|
|
}
|
|
|
|
func (p *Parser) Read() byte {
|
|
if p.Valid() {
|
|
c := p.b[p.i]
|
|
p.Advance()
|
|
return c
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (p *Parser) Peek() byte {
|
|
if p.Valid() {
|
|
return p.b[p.i]
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (p *Parser) Advance() {
|
|
p.i++
|
|
}
|
|
|
|
func (p *Parser) Skip(skip byte) bool {
|
|
if p.Peek() == skip {
|
|
p.Advance()
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (p *Parser) SkipBytes(skip []byte) bool {
|
|
if len(skip) > len(p.b[p.i:]) {
|
|
return false
|
|
}
|
|
if !bytes.Equal(p.b[p.i:p.i+len(skip)], skip) {
|
|
return false
|
|
}
|
|
p.i += len(skip)
|
|
return true
|
|
}
|
|
|
|
func (p *Parser) ReadSep(sep byte) ([]byte, bool) {
|
|
ind := bytes.IndexByte(p.b[p.i:], sep)
|
|
if ind == -1 {
|
|
b := p.b[p.i:]
|
|
p.i = len(p.b)
|
|
return b, false
|
|
}
|
|
|
|
b := p.b[p.i : p.i+ind]
|
|
p.i += ind + 1
|
|
return b, true
|
|
}
|
|
|
|
func (p *Parser) ReadIdentifier() (string, bool) {
|
|
if p.i < len(p.b) && p.b[p.i] == '(' {
|
|
s := p.i + 1
|
|
if ind := bytes.IndexByte(p.b[s:], ')'); ind != -1 {
|
|
b := p.b[s : s+ind]
|
|
p.i = s + ind + 1
|
|
return internal.String(b), false
|
|
}
|
|
}
|
|
|
|
ind := len(p.b) - p.i
|
|
var alpha bool
|
|
for i, c := range p.b[p.i:] {
|
|
if isNum(c) {
|
|
continue
|
|
}
|
|
if isAlpha(c) || (i > 0 && alpha && c == '_') {
|
|
alpha = true
|
|
continue
|
|
}
|
|
ind = i
|
|
break
|
|
}
|
|
if ind == 0 {
|
|
return "", false
|
|
}
|
|
b := p.b[p.i : p.i+ind]
|
|
p.i += ind
|
|
return internal.String(b), !alpha
|
|
}
|
|
|
|
func (p *Parser) ReadNumber() int {
|
|
ind := len(p.b) - p.i
|
|
for i, c := range p.b[p.i:] {
|
|
if !isNum(c) {
|
|
ind = i
|
|
break
|
|
}
|
|
}
|
|
if ind == 0 {
|
|
return 0
|
|
}
|
|
n, err := strconv.Atoi(string(p.b[p.i : p.i+ind]))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
p.i += ind
|
|
return n
|
|
}
|
|
|
|
func isNum(c byte) bool {
|
|
return c >= '0' && c <= '9'
|
|
}
|
|
|
|
func isAlpha(c byte) bool {
|
|
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
|
|
}
|