/* Test of fseeko() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2011 Free Software Foundation, Inc.
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
#include <config.h>
+/* None of the files accessed by this test are large, so disable the
+ fseek link warning if we are not using the gnulib fseek module. */
+#define _GL_NO_LARGE_FILES
#include <stdio.h>
-/* Get off_t. */
-#include <sys/types.h>
+#include "signature.h"
+SIGNATURE_CHECK (fseeko, int, (FILE *, off_t, int));
+
+
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
int
-main (int argc, char **argv)
+main (int argc, char **argv _GL_UNUSED)
{
- /* Assume stdin is seekable iff argc > 1. */
+ /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh'
+ iff argc > 1. */
int expected = argc > 1 ? 0 : -1;
/* Exit with success only if fseek/fseeko agree. */
- int r1 = fseeko (stdin, (off_t)0, SEEK_CUR);
- int r2 = fseek (stdin, (long)0, SEEK_CUR);
- return ! (r1 == r2 && r1 == expected);
+ int r1 = fseeko (stdin, 0, SEEK_CUR);
+ int r2 = fseek (stdin, 0, SEEK_CUR);
+ ASSERT (r1 == r2 && r1 == expected);
+ if (argc > 1)
+ {
+ /* Test that fseek discards previously read ungetc data. */
+ int ch = fgetc (stdin);
+ ASSERT (ch == '#');
+ ASSERT (ungetc (ch, stdin) == ch);
+ ASSERT (fseeko (stdin, 2, SEEK_SET) == 0);
+ ch = fgetc (stdin);
+ ASSERT (ch == '/');
+ if (2 < argc)
+ {
+ if (FUNC_UNGETC_BROKEN)
+ {
+ fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+ stderr);
+ return 77;
+ }
+ /* Test that fseek discards random ungetc data. */
+ ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff));
+ }
+ ASSERT (fseeko (stdin, 0, SEEK_END) == 0);
+ ASSERT (fgetc (stdin) == EOF);
+ /* Test that fseek resets end-of-file marker. */
+ ASSERT (feof (stdin));
+ ASSERT (fseeko (stdin, 0, SEEK_END) == 0);
+ ASSERT (!feof (stdin));
+ }
+ return 0;
}