func (w *writer) Close() error {
defer C.BZ2_bzCompressEnd(&w.bzStream)
// Finish the stream.
w.bzStream.next_in = nil
w.bzStream.avail_in = 0
done := false
for !done {
w.bzStream.next_out = (*C.char)(unsafe.Pointer(&w.outBuffer[0]))
w.bzStream.avail_out = C.uint(len(w.outBuffer))
ret := C.BZ2_bzCompress(&w.bzStream, C.BZ_FINISH)
switch ret {
case C.BZ_FINISH_OK:
case C.BZ_STREAM_END:
done = true
default:
return translateError(ret)
}
if err := w.writeAvailOut(); err != nil {
return err
}
}
return nil
}
func (w *writer) Write(b []byte) (n int, err error) {
if len(b) == 0 {
return 0, nil
}
w.bzStream.next_in = (*C.char)(unsafe.Pointer(&b[0]))
w.bzStream.avail_in = C.uint(len(b))
for w.bzStream.avail_in > 0 {
// Compress the available data.
w.bzStream.next_out = (*C.char)(unsafe.Pointer(&w.outBuffer[0]))
w.bzStream.avail_out = C.uint(len(w.outBuffer))
ret := C.BZ2_bzCompress(&w.bzStream, C.BZ_RUN)
if ret != C.BZ_RUN_OK {
return len(b) - int(w.bzStream.avail_in), translateError(ret)
}
// Write the contents of the output buffer to the underlying writer.
if err = w.writeAvailOut(); err != nil {
return len(b) - int(w.bzStream.avail_in), err
}
}
return len(b), nil
}