68 lines
1.2 KiB
C
68 lines
1.2 KiB
C
#include <ansidecl.h>
|
|
#include <stdio.h>
|
|
|
|
#define TESTFILE "/tmp/test.dat"
|
|
|
|
int
|
|
main __P((void))
|
|
{
|
|
FILE *fp;
|
|
int i, j;
|
|
|
|
puts ("\nFile seek test");
|
|
fp = fopen (TESTFILE, "w");
|
|
if (fp == NULL)
|
|
{
|
|
perror (TESTFILE);
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; i < 256; i++)
|
|
putc (i, fp);
|
|
if (freopen (TESTFILE, "r", fp) != fp)
|
|
{
|
|
perror ("Cannot open file for reading");
|
|
return 1;
|
|
}
|
|
|
|
for (i = 1; i <= 255; i++)
|
|
{
|
|
printf ("%3d\n", i);
|
|
fseek (fp, (long) -i, SEEK_END);
|
|
if ((j = getc (fp)) != 256 - i)
|
|
{
|
|
printf ("SEEK_END failed %d\n", j);
|
|
break;
|
|
}
|
|
if (fseek (fp, (long) i, SEEK_SET))
|
|
{
|
|
puts ("Cannot SEEK_SET");
|
|
break;
|
|
}
|
|
if ((j = getc (fp)) != i)
|
|
{
|
|
printf ("SEEK_SET failed %d\n", j);
|
|
break;
|
|
}
|
|
if (fseek (fp, (long) i, SEEK_SET))
|
|
{
|
|
puts ("Cannot SEEK_SET");
|
|
break;
|
|
}
|
|
if (fseek (fp, (long) (i >= 128 ? -128 : 128), SEEK_CUR))
|
|
{
|
|
puts ("Cannot SEEK_CUR");
|
|
break;
|
|
}
|
|
if ((j = getc (fp)) != (i >= 128 ? i - 128 : i + 128))
|
|
{
|
|
printf ("SEEK_CUR failed %d\n", j);
|
|
break;
|
|
}
|
|
}
|
|
fclose (fp);
|
|
|
|
puts ((i > 255) ? "Test succeeded." : "Test FAILED!");
|
|
return (i > 255) ? 0 : 1;
|
|
}
|