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#include <ansidecl.h>
#include <stdio.h>
#define TESTFILE "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;
}
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