opencv/3rdparty/zlib-ng/crc32.c
FantasqueX 85923c8f30
Merge pull request #26113 from FantasqueX:zlib-ng-2-2-1
Update zlib-ng to 2.2.1 #26113

Release: https://github.com/zlib-ng/zlib-ng/releases/tag/2.2.1
ARM diagnostics patch: https://github.com/zlib-ng/zlib-ng/pull/1774

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
2024-09-12 16:05:24 +03:00

43 lines
1.4 KiB
C

/* 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