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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6725 | siemargl | 1 | /* |
| 2 | Copyright (c) 1990-2008 Info-ZIP. All rights reserved. |
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| 3 | |||
| 4 | See the accompanying file LICENSE, version 2000-Apr-09 or later |
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| 5 | (the contents of which are also included in zip.h) for terms of use. |
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| 6 | If, for some reason, all these files are missing, the Info-ZIP license |
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| 7 | also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
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| 8 | */ |
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| 9 | /* crc32.h -- compute the CRC-32 of a data stream |
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| 10 | * Copyright (C) 1995 Mark Adler |
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| 11 | * For conditions of distribution and use, see copyright notice in zlib.h |
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| 12 | */ |
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| 13 | |||
| 14 | #ifndef __crc32_h |
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| 15 | #define __crc32_h /* identifies this source module */ |
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| 16 | |||
| 17 | /* This header should be read AFTER zip.h resp. unzip.h |
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| 18 | * (the latter with UNZIP_INTERNAL defined...). |
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| 19 | */ |
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| 20 | |||
| 21 | #ifndef OF |
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| 22 | # define OF(a) a |
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| 23 | #endif |
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| 24 | #ifndef ZCONST |
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| 25 | # define ZCONST const |
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| 26 | #endif |
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| 27 | |||
| 28 | #ifdef DYNALLOC_CRCTAB |
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| 29 | void free_crc_table OF((void)); |
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| 30 | #endif |
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| 31 | #ifndef USE_ZLIB |
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| 32 | ZCONST ulg near *get_crc_table OF((void)); |
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| 33 | #endif |
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| 34 | #if (defined(USE_ZLIB) || defined(CRC_TABLE_ONLY)) |
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| 35 | # ifdef IZ_CRC_BE_OPTIMIZ |
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| 36 | # undef IZ_CRC_BE_OPTIMIZ |
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| 37 | # endif |
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| 38 | #else /* !(USE_ZLIB || CRC_TABLE_ONLY) */ |
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| 39 | ulg crc32 OF((ulg crc, ZCONST uch *buf, extent len)); |
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| 40 | #endif /* ?(USE_ZLIB || CRC_TABLE_ONLY) */ |
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| 41 | |||
| 42 | #ifndef CRC_32_TAB |
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| 43 | # define CRC_32_TAB crc_32_tab |
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| 44 | #endif |
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| 45 | |||
| 46 | #ifdef CRC32 |
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| 47 | # undef CRC32 |
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| 48 | #endif |
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| 49 | #ifdef IZ_CRC_BE_OPTIMIZ |
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| 50 | # define CRC32UPD(c, crctab) (crctab[((c) >> 24)] ^ ((c) << 8)) |
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| 51 | # define CRC32(c, b, crctab) (crctab[(((int)(c) >> 24) ^ (b))] ^ ((c) << 8)) |
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| 52 | # define REV_BE(w) (((w)>>24)+(((w)>>8)&0xff00)+ \ |
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| 53 | (((w)&0xff00)<<8)+(((w)&0xff)<<24)) |
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| 54 | #else |
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| 55 | # define CRC32UPD(c, crctab) (crctab[((int)(c)) & 0xff] ^ ((c) >> 8)) |
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| 56 | # define CRC32(c, b, crctab) (crctab[((int)(c) ^ (b)) & 0xff] ^ ((c) >> 8)) |
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| 57 | # define REV_BE(w) w |
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| 58 | #endif |
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| 59 | |||
| 60 | #endif /* !__crc32_h */ |