cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_test_crc32.h (3385B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 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
     22/**
     23 *  \file SDL_test_crc32.h
     24 *
     25 *  Include file for SDL test framework.
     26 *
     27 *  This code is a part of the SDL2_test library, not the main SDL library.
     28 */
     29
     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
     42extern "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
     63/**
     64 * Data structure for CRC32 (checksum) computation
     65 */
     66  typedef struct {
     67    CrcUint32    crc32_table[256]; /* CRC table */
     68  } SDLTest_Crc32Context;
     69
     70/* ---------- Function Prototypes ------------- */
     71
     72/**
     73 * /brief Initialize the CRC context
     74 *
     75 * Note: The function initializes the crc table required for all crc calculations.
     76 *
     77 * /param crcContext        pointer to context variable
     78 *
     79 * /returns 0 for OK, -1 on error
     80 *
     81 */
     82 int SDLTest_Crc32Init(SDLTest_Crc32Context * crcContext);
     83
     84
     85/**
     86 * /brief calculate a crc32 from a data block
     87 *
     88 * /param crcContext         pointer to context variable
     89 * /param inBuf              input buffer to checksum
     90 * /param inLen              length of input buffer
     91 * /param crc32              pointer to Uint32 to store the final CRC into
     92 *
     93 * /returns 0 for OK, -1 on error
     94 *
     95 */
     96int SDLTest_crc32Calc(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);
     97
     98/* Same routine broken down into three steps */
     99int SDLTest_Crc32CalcStart(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
    100int SDLTest_Crc32CalcEnd(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
    101int SDLTest_Crc32CalcBuffer(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);
    102
    103
    104/**
    105 * /brief clean up CRC context
    106 *
    107 * /param crcContext        pointer to context variable
    108 *
    109 * /returns 0 for OK, -1 on error
    110 *
    111*/
    112
    113int 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: */