mirror of https://github.com/mpv-player/mpv
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
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* Simple file compare program, it finds the number of rounding errors
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* and dies if there is too large an error ( ABS(a-b)>1 ).
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*
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* copyright (c) 2001 Michael Niedermayer
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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// FIXME: No checks but it is just for debugging so who cares ;)
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int main(int argc, char **argv)
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{
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FILE *f0, *f1;
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int dif=0;
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if(argc!=3)
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{
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printf("compare <file1> <file2>\n");
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exit(2);
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}
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f0= fopen(argv[1], "rb");
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f1= fopen(argv[2], "rb");
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for(;;)
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{
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short c0;
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short c1;
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int d;
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int e0= fread(&c0, 2, 1, f0);
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int e1= fread(&c1, 2, 1, f1);
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d=c0-c1;
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if(e0==0 && e1==0) break;
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if(e0==0 || e1==0)
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{
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printf("FATAL error, files have different size!\n");
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exit(1);
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}
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if(d<0) d=-d; // ABS
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if(d>1)
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{
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printf("FATAL error, too large a difference found (%d)!\n", d);
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exit(1);
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}
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if(d) dif++;
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}
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fclose(f0);
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fclose(f1);
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printf("%d (+/-1)differences found\n", dif);
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exit(0);
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}
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