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patch.go
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87 lines (70 loc) · 1.61 KB
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package git
/*
#include <git2.h>
*/
import "C"
import (
"runtime"
"unsafe"
)
type Patch struct {
ptr *C.git_patch
}
func newPatchFromC(ptr *C.git_patch) *Patch {
if ptr == nil {
return nil
}
patch := &Patch{
ptr: ptr,
}
runtime.SetFinalizer(patch, (*Patch).Free)
return patch
}
func (patch *Patch) Free() error {
if patch.ptr == nil {
return ErrInvalid
}
runtime.SetFinalizer(patch, nil)
C.git_patch_free(patch.ptr)
patch.ptr = nil
return nil
}
func (patch *Patch) String() (string, error) {
if patch.ptr == nil {
return "", ErrInvalid
}
var buf C.git_buf
runtime.LockOSThread()
defer runtime.UnlockOSThread()
ecode := C.git_patch_to_buf(&buf, patch.ptr)
if ecode < 0 {
return "", MakeGitError(ecode)
}
return C.GoString(buf.ptr), nil
}
func toPointer(data []byte) (ptr unsafe.Pointer) {
if len(data) > 0 {
ptr = unsafe.Pointer(&data[0])
} else {
ptr = unsafe.Pointer(nil)
}
return
}
func (v *Repository) PatchFromBuffers(oldPath, newPath string, oldBuf, newBuf []byte, opts *DiffOptions) (*Patch, error) {
var patchPtr *C.git_patch
oldPtr := toPointer(oldBuf)
newPtr := (*C.char)(toPointer(newBuf))
cOldPath := C.CString(oldPath)
defer C.free(unsafe.Pointer(cOldPath))
cNewPath := C.CString(newPath)
defer C.free(unsafe.Pointer(cNewPath))
copts, _ := diffOptionsToC(opts)
defer freeDiffOptions(copts)
runtime.LockOSThread()
defer runtime.UnlockOSThread()
ecode := C.git_patch_from_buffers(&patchPtr, oldPtr, C.size_t(len(oldBuf)), cOldPath, newPtr, C.size_t(len(newBuf)), cNewPath, copts)
if ecode < 0 {
return nil, MakeGitError(ecode)
}
return newPatchFromC(patchPtr), nil
}