aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/lzma/liblzma/simple/simple_encoder.c
blob: d1f35096e2ae01ee9ddd50dad2c988f5ec1f0215 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
// SPDX-License-Identifier: 0BSD

///////////////////////////////////////////////////////////////////////////////
//
/// \file       simple_encoder.c
/// \brief      Properties encoder for simple filters
//
//  Author:     Lasse Collin
//
///////////////////////////////////////////////////////////////////////////////

#include "simple_encoder.h"


extern lzma_ret
lzma_simple_props_size(uint32_t *size, const void *options)
{
	const lzma_options_bcj *const opt = options;
	*size = (opt == NULL || opt->start_offset == 0) ? 0 : 4;
	return LZMA_OK;
}


extern lzma_ret
lzma_simple_props_encode(const void *options, uint8_t *out)
{
	const lzma_options_bcj *const opt = options;

	// The default start offset is zero, so we don't need to store any
	// options unless the start offset is non-zero.
	if (opt == NULL || opt->start_offset == 0)
		return LZMA_OK;

	write32le(out, opt->start_offset);

	return LZMA_OK;
}