/* Test of ftello() 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 (ftello, off_t, (FILE *));
+
+#include "binary-io.h"
+#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)
{
+ int ch;
/* Assume stdin is seekable iff argc > 1. */
- int expected = argc > 1 ? 0 : -1;
- /* Exit with success only if ftell/ftello agree. */
- off_t pos1 = ftello (stdin);
- long pos2 = ftell (stdin);
- return ! (pos1 == pos2 && pos1 == expected);
+ if (argc == 1)
+ {
+ ASSERT (ftell (stdin) == -1);
+ ASSERT (ftello (stdin) == -1);
+ return 0;
+ }
+
+ /* mingw ftell is unreliable on text mode input. */
+ SET_BINARY (0);
+
+ /* Simple tests. For each test, make sure ftell and ftello agree. */
+ ASSERT (ftell (stdin) == 0);
+ ASSERT (ftello (stdin) == 0);
+
+ ch = fgetc (stdin);
+ ASSERT (ch == '#');
+ ASSERT (ftell (stdin) == 1);
+ ASSERT (ftello (stdin) == 1);
+
+ /* Test ftell after ungetc of read input. */
+ ch = ungetc ('#', stdin);
+ ASSERT (ch == '#');
+ ASSERT (ftell (stdin) == 0);
+ ASSERT (ftello (stdin) == 0);
+
+ ch = fgetc (stdin);
+ ASSERT (ch == '#');
+ ASSERT (ftell (stdin) == 1);
+ ASSERT (ftello (stdin) == 1);
+
+ /* Test ftell after fseek. */
+ ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
+ ASSERT (ftell (stdin) == 2);
+ ASSERT (ftello (stdin) == 2);
+
+ /* Test ftell after random ungetc. */
+ ch = fgetc (stdin);
+ ASSERT (ch == '/');
+ ch = ungetc ('@', stdin);
+ ASSERT (ch == '@');
+ ASSERT (ftell (stdin) == 2);
+ ASSERT (ftello (stdin) == 2);
+
+ ch = fgetc (stdin);
+ ASSERT (ch == '@');
+ ASSERT (ftell (stdin) == 3);
+ ASSERT (ftello (stdin) == 3);
+
+ if (2 < argc)
+ {
+ if (FUNC_UNGETC_BROKEN)
+ {
+ fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+ stderr);
+ return 77;
+ }
+ /* Test ftell after ungetc without read. */
+ ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
+ ASSERT (ftell (stdin) == 3);
+ ASSERT (ftello (stdin) == 3);
+
+ ch = ungetc ('~', stdin);
+ ASSERT (ch == '~');
+ ASSERT (ftell (stdin) == 2);
+ ASSERT (ftello (stdin) == 2);
+ }
+
+#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
+ /* Test ftell beyond end of file. */
+ ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+ ch = ftello (stdin);
+ ASSERT (fseek (stdin, 10, SEEK_END) == 0);
+ ASSERT (ftell (stdin) == ch + 10);
+ ASSERT (ftello (stdin) == ch + 10);
+#endif
+
+ return 0;
}