752d7d239a
Compiler output is identical before & after this step git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/branches/wizou@6036 212acab6-be3b-0410-9dea-997c60f758d6
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
//---------------------------------------------------------------------------
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// checksum.c
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//---------------------------------------------------------------------------
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// -=* VPatch *=-
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//---------------------------------------------------------------------------
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// Copyright (C) 2001-2005 Koen van de Sande / Van de Sande Productions
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//---------------------------------------------------------------------------
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// Website: http://www.tibed.net/vpatch
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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//
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// Reviewed for Unicode support by Jim Park -- 08/29/2007
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#include "checksum.h"
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#ifdef _MSC_VER
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# define FORCE_INLINE __forceinline
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#else
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# ifdef __GNUC__
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# if __GNUC__ < 3
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# define FORCE_INLINE inline
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# else
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# define FORCE_INLINE inline __attribute__ ((always_inline))
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# endif
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# else
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# define FORCE_INLINE inline
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# endif
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#endif
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/* ------------------------ CRC32 checksum calculation ----------------- */
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UINT CRCTable[256];
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BOOL bInitCRC = FALSE;
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FORCE_INLINE void InitCRC() {
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int i, j; unsigned long c;
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for (c = i = 0; i < 256; c = ++i) {
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for (j = 0; j < 8; j++) {
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if (c & 1) c = (c>>1) ^ 0xEDB88320;
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else c >>= 1;
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}
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CRCTable[i] = c;
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}
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bInitCRC = TRUE;
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}
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#define CRCBLOCKSIZE 4096
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BOOL FileCRC(HANDLE hFile, DWORD *crc) {
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static BYTE crcblock[CRCBLOCKSIZE];
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DWORD read;
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BYTE *p;
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UINT c = 0xFFFFFFFF;
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if (bInitCRC == FALSE)
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InitCRC();
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SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
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do {
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if (ReadFile(hFile, crcblock, CRCBLOCKSIZE, &read, NULL) == FALSE)
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return FALSE;
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for (p = crcblock; p < crcblock + read; p++)
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c = CRCTable[(c & 0xFF) ^ *p] ^ (c >> 8);
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} while (read);
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*crc = (c ^ 0xFFFFFFFF);
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return TRUE;
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}
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void CRC32ToString(char* string, DWORD crc) {
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int i = 0;
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int j = 7;
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int a1, a2;
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for(i = 0; i < 4; i++) {
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a1 = (crc >> 4) % 16;
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a2 = crc % 16;
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string[j--] = a2 < 10 ? ('0' + a2) : ('A' + a2 - 10);
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string[j--] = a1 < 10 ? ('0' + a1) : ('A' + a1 - 10);
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crc = crc >> 8;
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}
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}
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/* ------------------------ MD5 checksum calculation ----------------- */
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#define MD5BLOCKSIZE 16384
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BOOL FileMD5(HANDLE hFile, md5_byte_t digest[16]) {
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static BYTE md5block[MD5BLOCKSIZE];
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DWORD read;
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md5_state_t state;
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md5_init(&state);
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SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
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do {
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if (ReadFile(hFile, md5block, MD5BLOCKSIZE, &read, NULL) == FALSE)
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return FALSE;
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md5_append(&state, md5block, read);
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} while (read);
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md5_finish(&state, digest);
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return TRUE;
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}
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void MD5ToString(char* string, md5_byte_t checksum[16]) {
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int i = 0;
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int j = 0;
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int a1, a2;
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for(i = 0; i < 16; i++) {
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a1 = (checksum[i] >> 4) % 16;
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a2 = checksum[i] % 16;
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string[j++] = a1 < 10 ? ('0' + a1) : ('A' + a1 - 10);
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string[j++] = a2 < 10 ? ('0' + a2) : ('A' + a2 - 10);
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}
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}
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