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100 lines
2.9 KiB
Go
100 lines
2.9 KiB
Go
// Package librclone exports shims for C library use
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//
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// This directory contains code to build rclone as a C library and the
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// shims for accessing rclone from C.
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//
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// The shims are a thin wrapper over the rclone RPC.
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//
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// Build a shared library like this:
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//
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// go build --buildmode=c-shared -o librclone.so github.com/rclone/rclone/librclone
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//
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// Build a static library like this:
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//
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// go build --buildmode=c-archive -o librclone.a github.com/rclone/rclone/librclone
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//
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// Both the above commands will also generate `librclone.h` which should
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// be `#include`d in `C` programs wishing to use the library.
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//
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// The library will depend on `libdl` and `libpthread`.
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package main
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/*
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#include <stdlib.h>
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struct RcloneRPCResult {
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char* Output;
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int Status;
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};
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*/
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import "C"
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import (
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"unsafe"
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"github.com/rclone/rclone/librclone/librclone"
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_ "github.com/rclone/rclone/backend/all" // import all backends
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_ "github.com/rclone/rclone/fs/operations" // import operations/* rc commands
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_ "github.com/rclone/rclone/fs/sync" // import sync/*
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_ "github.com/rclone/rclone/lib/plugin" // import plugins
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)
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// RcloneInitialize initializes rclone as a library
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//
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//export RcloneInitialize
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func RcloneInitialize() {
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librclone.Initialize()
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}
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// RcloneFinalize finalizes the library
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//
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//export RcloneFinalize
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func RcloneFinalize() {
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librclone.Finalize()
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}
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// RcloneRPCResult is returned from RcloneRPC
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//
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// Output will be returned as a serialized JSON object
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// Status is a HTTP status return (200=OK anything else fail)
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type RcloneRPCResult struct { //nolint:deadcode
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Output *C.char
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Status C.int
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}
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// RcloneRPC does a single RPC call. The inputs are (method, input)
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// and the output is (output, status). This is an exported interface
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// to the rclone API as described in https://rclone.org/rc/
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//
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// method is a string, eg "operations/list"
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// input should be a serialized JSON object
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// result.Output will be returned as a serialized JSON object
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// result.Status is a HTTP status return (200=OK anything else fail)
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//
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// Caller is responsible for freeing the memory for result.Output,
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// result itself is passed on the stack.
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//
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//export RcloneRPC
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func RcloneRPC(method *C.char, input *C.char) (result C.struct_RcloneRPCResult) { //nolint:golint
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output, status := librclone.RPC(C.GoString(method), C.GoString(input))
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result.Output = C.CString(output)
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result.Status = C.int(status)
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return result
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}
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// RcloneFreeString may be used to free the string returned by RcloneRPC
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//
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// If the caller has access to the C standard library, the free function can
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// normally be called directly instead. In some cases the caller uses a
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// runtime library which is not compatible, and then this function can be
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// used to release the memory with the same library that allocated it.
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//
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//export RcloneFreeString
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func RcloneFreeString(str *C.char) {
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C.free(unsafe.Pointer(str))
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}
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// do nothing here - necessary for building into a C library
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func main() {}
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