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43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* crc32.c -- compute the CRC-32 of a data stream
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* Copyright (C) 1995-2022 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*
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* This interleaved implementation of a CRC makes use of pipelined multiple
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* arithmetic-logic units, commonly found in modern CPU cores. It is due to
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* Kadatch and Jenkins (2010). See doc/crc-doc.1.0.pdf in this distribution.
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*/
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#include "zbuild.h"
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#include "functable.h"
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#include "crc32_braid_tbl.h"
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/* ========================================================================= */
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const uint32_t * Z_EXPORT PREFIX(get_crc_table)(void) {
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return (const uint32_t *)crc_table;
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}
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#ifdef ZLIB_COMPAT
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unsigned long Z_EXPORT PREFIX(crc32_z)(unsigned long crc, const unsigned char *buf, size_t len) {
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if (buf == NULL) return 0;
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return (unsigned long)FUNCTABLE_CALL(crc32)((uint32_t)crc, buf, len);
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}
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#else
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uint32_t Z_EXPORT PREFIX(crc32_z)(uint32_t crc, const unsigned char *buf, size_t len) {
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if (buf == NULL) return 0;
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return FUNCTABLE_CALL(crc32)(crc, buf, len);
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}
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#endif
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#ifdef ZLIB_COMPAT
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unsigned long Z_EXPORT PREFIX(crc32)(unsigned long crc, const unsigned char *buf, unsigned int len) {
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return (unsigned long)PREFIX(crc32_z)((uint32_t)crc, buf, len);
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}
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#else
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uint32_t Z_EXPORT PREFIX(crc32)(uint32_t crc, const unsigned char *buf, uint32_t len) {
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return PREFIX(crc32_z)(crc, buf, len);
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}
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#endif
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