1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* Simple file compare program, it finds the number of rounding errors
* and dies if there is too large an error ( ABS(a-b)>1 ).
*
* copyright (c) 2001 Michael Niedermayer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
// FIXME: No checks but it is just for debugging so who cares ;)
int main(int argc, char **argv)
{
FILE *f0, *f1;
int dif=0;
if(argc!=3)
{
printf("compare <file1> <file2>\n");
exit(2);
}
f0= fopen(argv[1], "rb");
f1= fopen(argv[2], "rb");
for(;;)
{
short c0;
short c1;
int d;
int e0= fread(&c0, 2, 1, f0);
int e1= fread(&c1, 2, 1, f1);
d=c0-c1;
if(e0==0 && e1==0) break;
if(e0==0 || e1==0)
{
printf("FATAL error, files have different size!\n");
exit(1);
}
if(d<0) d=-d; // ABS
if(d>1)
{
printf("FATAL error, too large a difference found (%d)!\n", d);
exit(1);
}
if(d) dif++;
}
fclose(f0);
fclose(f1);
printf("%d (+/-1)differences found\n", dif);
exit(0);
}
|
