C++ (Cpp) stream_flags_decode Exemples

Exemple #1

Fichier : stream_flags_decoder.c Projet : KatrinaHoffert/megaglest-source

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 != unaligned_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;
}

Exemple #2

Fichier : stream_flags_decoder.c Projet : 4ker/CMake

lzma_stream_footer_decode(lzma_stream_flags *options, const uint8_t *in)
{
	uint32_t crc;

	// 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
	crc = lzma_crc32(in + sizeof(uint32_t),
			sizeof(uint32_t) + LZMA_STREAM_FLAGS_SIZE, 0);
	if (crc != unaligned_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 = unaligned_read32le(in + sizeof(uint32_t));
	options->backward_size = (options->backward_size + 1) * 4;

	return LZMA_OK;
}