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54 lines
1.4 KiB
54 lines
1.4 KiB
/*
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* checkcrc.h
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*
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* Copyright (c) 2003 Paul Campbell <paul@taniwha.com>
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* Requires the Qt widget libraries, available at no cost at
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* http://www.troll.no/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _CHECKCRC_H_
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#define _CHECKCRC_H_
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#include <zlib.h>
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#include <stdio.h>
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static void
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checkcrc(const char *name, unsigned long &len_res, unsigned long &crc_res)
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{
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unsigned long crc = ::crc32(0L, Z_NULL, 0);
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unsigned long len = 0;
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FILE *f = ::fopen(name, "r");
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if (f) {
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unsigned char buffer[1024];
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for (;;) {
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int l = ::fread(buffer, 1, sizeof(buffer), f);
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if (l <= 0)
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break;
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len += l;
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crc = ::crc32(crc, buffer, l);
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}
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::fclose(f);
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}
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crc_res = crc;
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len_res = len;
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}
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#endif
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