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/*
** FCOMPARE.C - Compare 2 files
**
** public domain demo by Bob Stout
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
enum {ERROR = -1, SUCCESS, FAIL};
#define BUFSIZE 16384
static char buf[2][BUFSIZE];
int fcompare(const char *fname1, const char *fname2)
{
FILE *f1, *f2;
int retval = SUCCESS;
if (NULL == (f1 = fopen(fname1, "rb")))
return ERROR;
if (NULL != (f2 = fopen(fname2, "rb")))
{
size_t size1, size2;
do
{
size1 = fread(buf[0], 1, BUFSIZE, f1);
size2 = fread(buf[1], 1, BUFSIZE, f2);
if (0 == (size1 | size2))
break;
if ((size1 != size2) || memcmp(buf[0], buf[1], size1))
{
retval = FAIL;
break;
}
} while (size1 && size2);
fclose(f2);
}
else retval = ERROR;
fclose(f1);
return retval;
}
#ifdef TEST
int main(int argc, char *argv[])
{
if (3 > argc)
{
puts("Usage: FCOMPARE file1 file2");
return 1;
}
printf("fcompare(%s, %s) returned %d\n", argv[1], argv[2],
fcompare(argv[1], argv[2]));
}
#endif /* TEST */
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