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SDL_test_crc32.h
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1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21
30 /*
31
32 Implements CRC32 calculations (default output is Perl String::CRC32 compatible).
33
34 */
35
36 #ifndef _SDL_test_crc32_h
37 #define _SDL_test_crc32_h
38
39 #include "begin_code.h"
40 /* Set up for C function definitions, even when using C++ */
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45
46 /* ------------ Definitions --------- */
47
48 /* Definition shared by all CRC routines */
49
50 #ifndef CrcUint32
51 #define CrcUint32 unsigned int
52 #endif
53 #ifndef CrcUint8
54 #define CrcUint8 unsigned char
55 #endif
56
57 #ifdef ORIGINAL_METHOD
58 #define CRC32_POLY 0x04c11db7 /* AUTODIN II, Ethernet, & FDDI */
59 #else
60 #define CRC32_POLY 0xEDB88320 /* Perl String::CRC32 compatible */
61 #endif
62
66 typedef struct {
67 CrcUint32 crc32_table[256]; /* CRC table */
68 } SDLTest_Crc32Context;
69
70 /* ---------- Function Prototypes ------------- */
71
82 int SDLTest_Crc32Init(SDLTest_Crc32Context * crcContext);
83
84
96 int SDLTest_crc32Calc(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);
97
98 /* Same routine broken down into three steps */
99 int SDLTest_Crc32CalcStart(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
100 int SDLTest_Crc32CalcEnd(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
101 int SDLTest_Crc32CalcBuffer(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);
102
103
113 int SDLTest_Crc32Done(SDLTest_Crc32Context * crcContext);
114
115
116 /* Ends C function definitions when using C++ */
117 #ifdef __cplusplus
118 }
119 #endif
120 #include "close_code.h"
121
122 #endif /* _SDL_test_crc32_h */
123
124 /* vi: set ts=4 sw=4 expandtab: */
SDLTest_crc32Calc
int SDLTest_crc32Calc(SDLTest_Crc32Context *crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32)
SDLTest_Crc32Done
int SDLTest_Crc32Done(SDLTest_Crc32Context *crcContext)
Definition: SDL_test_crc32.c:158
begin_code.h
close_code.h
crc32
unsigned long ZEXPORT crc32(unsigned long crc, const unsigned char FAR *buf, uInt len)
Definition: crc32.c:221
SDLTest_Crc32CalcStart
int SDLTest_Crc32CalcStart(SDLTest_Crc32Context *crcContext, CrcUint32 *crc32)
Definition: SDL_test_crc32.c:92
SDLTest_Crc32CalcEnd
int SDLTest_Crc32CalcEnd(SDLTest_Crc32Context *crcContext, CrcUint32 *crc32)
Definition: SDL_test_crc32.c:110
SDLTest_Crc32Init
int SDLTest_Crc32Init(SDLTest_Crc32Context *crcContext)
Definition: SDL_test_crc32.c:34
SDLTest_Crc32CalcBuffer
int SDLTest_Crc32CalcBuffer(SDLTest_Crc32Context *crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32)
Definition: SDL_test_crc32.c:128
SDLTest_Crc32Context
Definition: SDL_test_crc32.h:66
CrcUint32
#define CrcUint32
Definition: SDL_test_crc32.h:51
CrcUint8
#define CrcUint8
Definition: SDL_test_crc32.h:54