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📄 alone_decoder.c(5.53 KB)
📄 alone_decoder.h(601 B)
📄 alone_encoder.c(3.66 KB)
📄 auto_decoder.c(4.79 KB)
📄 block_buffer_decoder.c(2.31 KB)
📄 block_buffer_encoder.c(9.89 KB)
📄 block_buffer_encoder.h(763 B)
📄 block_decoder.c(6.82 KB)
📄 block_decoder.h(576 B)
📄 block_encoder.c(5.63 KB)
📄 block_encoder.h(1.85 KB)
📄 block_header_decoder.c(3.62 KB)
📄 block_header_encoder.c(3.27 KB)
📄 block_util.c(2.58 KB)
📄 common.c(10.4 KB)
📄 common.h(10.22 KB)
📄 easy_buffer_encoder.c(840 B)
📄 easy_decoder_memusage.c(668 B)
📄 easy_encoder.c(678 B)
📄 easy_encoder_memusage.c(654 B)
📄 easy_preset.c(727 B)
📄 easy_preset.h(921 B)
📄 filter_buffer_decoder.c(2.45 KB)
📄 filter_buffer_encoder.c(1.5 KB)
📄 filter_common.c(8.5 KB)
📄 filter_common.h(1.23 KB)
📄 filter_decoder.c(4.32 KB)
📄 filter_decoder.h(617 B)
📄 filter_encoder.c(7.17 KB)
📄 filter_encoder.h(732 B)
📄 filter_flags_decoder.c(1.16 KB)
📄 filter_flags_encoder.c(1.37 KB)
📄 hardware_cputhreads.c(526 B)
📄 hardware_physmem.c(683 B)
📄 index.c(34.61 KB)
📄 index.h(1.93 KB)
📄 index_decoder.c(8.4 KB)
📄 index_encoder.c(5.72 KB)
📄 index_encoder.h(584 B)
📄 index_hash.c(8.77 KB)
📄 memcmplen.h(4.71 KB)
📄 outqueue.c(4.48 KB)
📄 outqueue.h(4.88 KB)
📄 stream_buffer_decoder.c(2.72 KB)
📄 stream_buffer_encoder.c(3.96 KB)
📄 stream_decoder.c(12.7 KB)
📄 stream_decoder.h(599 B)
📄 stream_encoder.c(9.63 KB)
📄 stream_encoder_mt.c(29.64 KB)
📄 stream_flags_common.c(1.29 KB)
📄 stream_flags_common.h(883 B)
📄 stream_flags_decoder.c(2.23 KB)
📄 stream_flags_encoder.c(2.01 KB)
📄 vli_decoder.c(2.5 KB)
📄 vli_encoder.c(1.89 KB)
📄 vli_size.c(630 B)

Editing: stream_flags_decoder.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       stream_flags_decoder.c
/// \brief      Decodes Stream Header and Stream Footer from .xz files
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "stream_flags_common.h"

static bool
stream_flags_decode(lzma_stream_flags *options, const uint8_t *in)
{
	// Reserved bits must be unset.
	if (in[0] != 0x00 || (in[1] & 0xF0))
		return true;

options->version = 0;
	options->check = in[1] & 0x0F;

return false;
}

extern LZMA_API(lzma_ret)
lzma_stream_header_decode(lzma_stream_flags *options, const uint8_t *in)
{
	// Magic
	if (memcmp(in, lzma_header_magic, sizeof(lzma_header_magic)) != 0)
		return LZMA_FORMAT_ERROR;

// Verify the CRC32 so we can distinguish between corrupt
	// and unsupported files.
	const uint32_t crc = lzma_crc32(in + sizeof(lzma_header_magic),
			LZMA_STREAM_FLAGS_SIZE, 0);
	if (crc != read32le(in + sizeof(lzma_header_magic)
			+ LZMA_STREAM_FLAGS_SIZE))
		return LZMA_DATA_ERROR;

// Stream Flags
	if (stream_flags_decode(options, in + sizeof(lzma_header_magic)))
		return LZMA_OPTIONS_ERROR;

// Set Backward Size to indicate unknown value. That way
	// lzma_stream_flags_compare() can be used to compare Stream Header
	// and Stream Footer while keeping it useful also for comparing
	// two Stream Footers.
	options->backward_size = LZMA_VLI_UNKNOWN;

return LZMA_OK;
}

extern LZMA_API(lzma_ret)
lzma_stream_footer_decode(lzma_stream_flags *options, const uint8_t *in)
{
	// Magic
	if (memcmp(in + sizeof(uint32_t) * 2 + LZMA_STREAM_FLAGS_SIZE,
			lzma_footer_magic, sizeof(lzma_footer_magic)) != 0)
		return LZMA_FORMAT_ERROR;

// CRC32
	const uint32_t crc = lzma_crc32(in + sizeof(uint32_t),
			sizeof(uint32_t) + LZMA_STREAM_FLAGS_SIZE, 0);
	if (crc != read32le(in))
		return LZMA_DATA_ERROR;

// Stream Flags
	if (stream_flags_decode(options, in + sizeof(uint32_t) * 2))
		return LZMA_OPTIONS_ERROR;

// Backward Size
	options->backward_size = read32le(in + sizeof(uint32_t));
	options->backward_size = (options->backward_size + 1) * 4;

return LZMA_OK;
}

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Editing: stream_flags_decoder.c

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