The R Project SVN R

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
49813 ripley 1 
///////////////////////////////////////////////////////////////////////////////
2 
//
3 
/// \file       simple_decoder.c
4 
/// \brief      Properties decoder 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_decoder.h"
14 
 
15 
 
16 
extern lzma_ret
17 
lzma_simple_props_decode(void **options, lzma_allocator *allocator,
18 
		const uint8_t *props, size_t props_size)
19 
{
20 
	if (props_size == 0)
21 
		return LZMA_OK;
22 
 
23 
	if (props_size != 4)
24 
		return LZMA_OPTIONS_ERROR;
25 
 
26 
	lzma_options_bcj *opt = lzma_alloc(
27 
			sizeof(lzma_options_bcj), allocator);
28 
	if (opt == NULL)
29 
		return LZMA_MEM_ERROR;
30 
 
53508 ripley 31 
	opt->start_offset = unaligned_read32le(props);
49813 ripley 32 
 
33 
	// Don't leave an options structure allocated if start_offset is zero.
34 
	if (opt->start_offset == 0)
35 
		lzma_free(opt, allocator);
36 
	else
37 
		*options = opt;
38 
 
39 
	return LZMA_OK;
40 
}