Function readBinaryDeltaSize

pkg/gitdiff/apply_binary.go:121–131

readBinaryDeltaSize reads a variable length size from a delta-encoded binary fragment, returing the size and the unused data. Data is encoded as: [[1xxxxxxx]...] [0xxxxxxx] in little-endian order, with 7 bits of the value per byte.

(d []byte)

//
// in little-endian order, with 7 bits of the value per byte.
func readBinaryDeltaSize(d []byte) (size int64, rest []byte) {
	shift := uint(0)
	for i, b := range d {
		size |= int64(b&0x7F) << shift
		shift += 7
		if b <= 0x7F {
			return size, d[i+1:]
		}
	}
	return size, nil
}

// applyBinaryDeltaAdd applies an add opcode in a delta-encoded binary
// fragment, returning the amount of data written and the usused part of the