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/*
* Copyright (c) 2002 Fabrice Bellard
* Copyright (c) 2013 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/adler32.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#if HAVE_IO_H
#include <io.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#define SIZE 65536
int main(int argc, char **argv)
{
uint8_t buffer[SIZE];
uint32_t checksum = 1;
int fd;
int ret = 0;
if (argc > 1) fd = open(argv[1], O_RDONLY);
else fd = 0;
if (fd == -1) {
printf("A32=OPEN-FAILED-%d\n", errno);
ret = 1;
goto end;
}
for (;;) {
ssize_t size = read(fd, buffer, SIZE);
if (size < 0) {
printf("A32=0x%08x+READ-FAILED-%d\n", checksum, errno);
ret = 2;
goto end;
} else if(!size)
break;
checksum = av_adler32_update(checksum, buffer, size);
}
close(fd);
printf("A32=0x%08x", checksum);
end:
if (argc > 1)
printf(" *%s", argv[1]);
printf("\n");
return ret;
}
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