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Rev 49813 Rev 53508
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extern LZMA_API(lzma_ret)
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extern LZMA_API(lzma_ret)
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lzma_block_header_encode(const lzma_block *block, uint8_t *out)
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lzma_block_header_encode(const lzma_block *block, uint8_t *out)
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{
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{
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	// Valdidate everything but filters.
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	// Validate everything but filters.
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	if (lzma_block_unpadded_size(block) == 0
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	if (lzma_block_unpadded_size(block) == 0
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			|| !lzma_vli_is_valid(block->uncompressed_size))
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			|| !lzma_vli_is_valid(block->uncompressed_size))
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		return LZMA_PROG_ERROR;
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		return LZMA_PROG_ERROR;
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	// Indicate the size of the buffer _excluding_ the CRC32 field.
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	// Indicate the size of the buffer _excluding_ the CRC32 field.
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	if (block->filters == NULL || block->filters[0].id == LZMA_VLI_UNKNOWN)
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	if (block->filters == NULL || block->filters[0].id == LZMA_VLI_UNKNOWN)
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		return LZMA_PROG_ERROR;
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		return LZMA_PROG_ERROR;
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	size_t filter_count = 0;
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	size_t filter_count = 0;
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	do {
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	do {
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		// There can be at maximum of four filters.
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		// There can be a maximum of four filters.
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		if (filter_count == LZMA_FILTERS_MAX)
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		if (filter_count == LZMA_FILTERS_MAX)
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			return LZMA_PROG_ERROR;
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			return LZMA_PROG_ERROR;
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		return_if_error(lzma_filter_flags_encode(
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		return_if_error(lzma_filter_flags_encode(
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				block->filters + filter_count,
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				block->filters + filter_count,
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	// Padding
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	// Padding
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	memzero(out + out_pos, out_size - out_pos);
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	memzero(out + out_pos, out_size - out_pos);
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	// CRC32
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	// CRC32
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	integer_write_32(out + out_size, lzma_crc32(out, out_size, 0));
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	unaligned_write32le(out + out_size, lzma_crc32(out, out_size, 0));
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	return LZMA_OK;
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	return LZMA_OK;
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}
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}