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