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/*
Copyright (C) 2010 EPFL (Ecole Polytechnique Fédérale de Lausanne)
Laboratory CNBI (Chair in Non-Invasive Brain-Machine Interface)
Nicolas Bourdaud <nicolas.bourdaud@epfl.ch>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <sys/types.h>
#include "filecmp.h"
int cmp_files(const char* testfilename, const char* reffilename,
int nskip, const off_t* skip, off_t* where)
{
int retcode = 0;
int n1, n2;
off_t pointer = 0;
unsigned char chunktest, chunkref;
FILE *reffile, *testfile;
// Open the files
reffile = fopen(reffilename,"rb");
testfile = fopen(testfilename,"rb");
if (!reffile || !testfile) {
fprintf(stderr,"\tOne of the files cannot be opened\n");
retcode = -1;
}
int iskip = 0;
while (!retcode) {
if ((iskip < nskip) && (pointer == skip[iskip*2])) {
fseek(testfile, skip[iskip*2+1], SEEK_SET);
fseek(reffile, skip[iskip*2+1], SEEK_SET);
pointer = skip[iskip*2+1];
iskip++;
}
n1 = fread(&chunktest, sizeof(chunktest), 1, testfile);
n2 = fread(&chunkref, sizeof(chunkref), 1, reffile);
if (n1 != n2) {
fprintf(stderr,"\tThe files differ by the size\n");
retcode = -1;
break;
}
if ((n1 == 0) || (n2==0))
break;
// Check that the ref and test are the same
if (chunkref != chunktest) {
fprintf(stderr,
"\tThe files differs at 0x%08x\n",
(unsigned int)pointer);
retcode = -1;
break;
}
pointer++;
}
if (reffile)
fclose(reffile);
if (testfile)
fclose(testfile);
if (!retcode)
fprintf(stderr, "\tThe files are identical\n");
else if (where)
*where = pointer;
return retcode;
}
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