Blame src/hash/ntapi_tt_crc32.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013--2021  Z. Gilboa                 */
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/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
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/********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <ntapi/nt_crc32.h>
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#include "ntapi_impl.h"
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static const uint32_t crc32_table[256] = NTAPI_CRC32_TABLE;
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uint32_t __ntapi_tt_buffer_crc32(
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	uint32_t	prev_hash,
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	const void *	buffer,
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	size_t		size)
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{
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	const unsigned char *	ch;
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	uint32_t		crc32;
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	crc32	= prev_hash ^ 0xFFFFFFFF;
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	ch	= buffer;
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	for (; size; size--,ch++)
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		crc32 = (crc32 >> 8) ^ crc32_table[(crc32 ^ *ch) & 0xFF];
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	return (crc32 ^ 0xFFFFFFFF);
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}
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uint32_t __cdecl __ntapi_tt_mbstr_crc32(const void * str)
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{
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	const unsigned char *	ch;
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	uint32_t		crc32;
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	crc32	= 0 ^ 0xFFFFFFFF;
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	ch	= str;
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	while (*ch) {
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		crc32 = (crc32 >> 8) ^ crc32_table[(crc32 ^ *ch) & 0xFF];
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		ch++;
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	}
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	return (crc32 ^ 0xFFFFFFFF);
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}
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const uint32_t * __cdecl __ntapi_tt_crc32_table(void)
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{
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	return crc32_table;
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}