/tmp/buildd/xz-utils-5.0.0/src/liblzma/check/crc32_small.c File Reference

CRC32 calculation (size-optimized). More...

#include "check.h"

Functions
static void	crc32_init (void)
void	lzma_crc32_init (void)
uint32_t	lzma_crc32 (const uint8_t *buf, size_t size, uint32_t crc)
	Calculate CRC32.
Variables
uint32_t	lzma_crc32_table [1][256]

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Detailed Description

CRC32 calculation (size-optimized).

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Function Documentation

uint32_t lzma_crc32	(	const uint8_t *	buf,
		size_t	size,
		uint32_t	crc
	)

Calculate CRC32.

Calculate CRC32 using the polynomial from the IEEE 802.3 standard.

Parameters:

	buf	Pointer to the input buffer
	size	Size of the input buffer
	crc	Previously returned CRC value. This is used to calculate the CRC of a big buffer in smaller chunks. Set to zero when starting a new calculation.

Returns:

Updated CRC value, which can be passed to this function again to continue CRC calculation.

References lzma_crc32_table.

Referenced by lzma_block_header_decode(), lzma_block_header_encode(), lzma_check_update(), lzma_index_hash_decode(), lzma_stream_footer_decode(), lzma_stream_footer_encode(), lzma_stream_header_decode(), and lzma_stream_header_encode().

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Variable Documentation

uint32_t lzma_crc32_table[1][256]

lzma_crc32_table[0] is needed by LZ encoder so we need to keep the array two-dimensional.

Referenced by lzma_crc32().