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package librsync // import "code.laria.me/golibrsync/librsync"
/*
#include <stdio.h>
#include <librsync.h>
#include <stdlib.h>
*/
import "C"
import (
"io"
"unsafe"
)
//export patchCallbackGo
func patchCallbackGo(_patcher uintptr, pos C.rs_long_t, buflen *C.size_t, buf *unsafe.Pointer) C.rs_result {
patcher := getPatcher(_patcher)
if patcher.buf != nil {
C.free(patcher.buf)
}
patcher.buf = C.malloc(*buflen)
// https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices
s := (*[1 << 30]byte)(patcher.buf)[:*buflen:*buflen]
n, err := patcher.basis.ReadAt(s, int64(pos))
if n < int(*buflen) {
if err != io.EOF {
panic(jobInternalPanic{err})
} else {
return C.RS_INPUT_ENDED
}
}
*buflen = C.size_t(n)
*buf = patcher.buf
return C.RS_DONE
}
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