mirror of
https://git.tukaani.org/xz.git
synced 2025-11-03 23:12:57 +00:00
ebfb2c5e1f
This replaces bswap.h and integer.h. The tuklib module uses <byteswap.h> on GNU, <sys/endian.h> on *BSDs and <sys/byteorder.h> on Solaris, which may contain optimized code like inline assembly.
41 lines
986 B
C
41 lines
986 B
C
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
/// \file simple_decoder.c
|
|
/// \brief Properties decoder for simple filters
|
|
//
|
|
// Author: Lasse Collin
|
|
//
|
|
// This file has been put into the public domain.
|
|
// You can do whatever you want with this file.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "simple_decoder.h"
|
|
|
|
|
|
extern lzma_ret
|
|
lzma_simple_props_decode(void **options, lzma_allocator *allocator,
|
|
const uint8_t *props, size_t props_size)
|
|
{
|
|
if (props_size == 0)
|
|
return LZMA_OK;
|
|
|
|
if (props_size != 4)
|
|
return LZMA_OPTIONS_ERROR;
|
|
|
|
lzma_options_bcj *opt = lzma_alloc(
|
|
sizeof(lzma_options_bcj), allocator);
|
|
if (opt == NULL)
|
|
return LZMA_MEM_ERROR;
|
|
|
|
opt->start_offset = unaligned_read32le(props);
|
|
|
|
// Don't leave an options structure allocated if start_offset is zero.
|
|
if (opt->start_offset == 0)
|
|
lzma_free(opt, allocator);
|
|
else
|
|
*options = opt;
|
|
|
|
return LZMA_OK;
|
|
}
|