/* Test of fseek() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2012 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 the user requested GNULIB_POSIXCHECK. */
+#define _GL_NO_LARGE_FILES
#include <stdio.h>
+#include "signature.h"
+SIGNATURE_CHECK (fseek, int, (FILE *, long, int));
+
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
+
int
main (int argc, char **argv)
{
- /* Assume stdin is non-empty and seekable iff argc > 1. */
+ /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh'
+ iff argc > 1. */
int expected = argc > 1 ? 0 : -1;
- if (fseek (stdin, 0, SEEK_CUR) != expected)
- return 1;
+ ASSERT (fseek (stdin, 0, SEEK_CUR) == expected);
if (argc > 1)
{
- /* Test that fseek discards ungetc data. */
+ /* Test that fseek discards previously read ungetc data. */
int ch = fgetc (stdin);
- if (ch == EOF)
- return 1;
- if (ungetc (ch ^ 0xff, stdin) != (ch ^ 0xff))
- return 1;
- if (fseek (stdin, 0, SEEK_END))
- return 1;
- if (fgetc (stdin) != EOF)
- return 1;
+ ASSERT (ch == '#');
+ ASSERT (ungetc (ch, stdin) == ch);
+ ASSERT (fseek (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 (fseek (stdin, 0, SEEK_END) == 0);
+ ASSERT (fgetc (stdin) == EOF);
/* Test that fseek resets end-of-file marker. */
- if (!feof (stdin))
- return 1;
- if (fseek (stdin, 0, SEEK_END))
- return 1;
- if (feof (stdin))
- return 1;
+ ASSERT (feof (stdin));
+ ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+ ASSERT (!feof (stdin));
}
return 0;
}