// Uncompress with an unknown output size. The destination buffer should have
// a cap() of sufficient size to hold the output, otherwise an error is returned.
func UncompressUnknownOutputSize(input []byte, output *[]byte) error {
ip, op := charp(&input), charp(output)
resultlen := int(C.LZ4_uncompress_unknownOutputSize(
ip, op, C.int(len(input)), C.int(cap(*output))))
if resultlen < 0 {
return fmt.Errorf("decompression failed: resultlen=%d", resultlen)
}
*output = (*output)[0:resultlen]
if len(*output) != resultlen {
return fmt.Errorf("Failed to resize destination buffer")
}
return nil
}
func DecompressUnknownOutputSize(in, out []byte) int {
n := C.LZ4_uncompress_unknownOutputSize((*C.char)(unsafe.Pointer(&in[0])), (*C.char)(unsafe.Pointer(&out[0])), C.int(len(in)), C.int(len(out)))
return (int)(n)
}
/*
isize : is the input size, therefore the compressed size
maxOutputSize : is the size of the destination buffer (which must be already allocated)
return : the number of bytes decoded in the destination buffer (necessarily <= maxOutputSize)
If the source stream is malformed, the function will stop decoding and return a negative result, indicating the byte position of the faulty instruction
This function never writes beyond dest + maxOutputSize, and is therefore protected against malicious data packets
note : Destination buffer must be already allocated.
This version is slightly slower than Decompress()
*/
func DecompressUnknownOutputSize(source, dest []byte, isize, maxOutputSize int) int {
return int(C.LZ4_uncompress_unknownOutputSize(cast(source), cast(dest), C.int(isize), C.int(maxOutputSize)))
}