1///////////////////////////////////////////////////////////////////////////////
2//
3/// \file       simple_encoder.c
4/// \brief      Properties encoder for simple filters
5//
6//  Author:     Lasse Collin
7//
8//  This file has been put into the public domain.
9//  You can do whatever you want with this file.
10//
11///////////////////////////////////////////////////////////////////////////////
12
13#include "simple_encoder.h"
14
15
16extern lzma_ret
17lzma_simple_props_size(uint32_t *size, const void *options)
18{
19	const lzma_options_bcj *const opt = options;
20	*size = (opt == NULL || opt->start_offset == 0) ? 0 : 4;
21	return LZMA_OK;
22}
23
24
25extern lzma_ret
26lzma_simple_props_encode(const void *options, uint8_t *out)
27{
28	const lzma_options_bcj *const opt = options;
29
30	// The default start offset is zero, so we don't need to store any
31	// options unless the start offset is non-zero.
32	if (opt == NULL || opt->start_offset == 0)
33		return LZMA_OK;
34
35	unaligned_write32le(out, opt->start_offset);
36
37	return LZMA_OK;
38}
39