/* Test of POSIX compatible fflush() function.
- Copyright (C) 2008 Free Software Foundation, Inc.
+ Copyright (C) 2008-2013 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 <stdio.h>
-#include <stdlib.h>
-
-/* This test can only be made to work on specific platforms. */
-#if defined _IO_ferror_unlocked || defined __sferror /* GNU libc, BeOS; FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
-# define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- fflush (stderr); \
- abort (); \
- } \
- } \
- while (0)
-#else
-# define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- printf ("Skipping test: expected failure on this platform\n"); \
- exit (77); \
- } \
- } \
- while (0)
-#endif
+#include "binary-io.h"
+#include "macros.h"
int
main (int argc, char **argv)
{
-#if 0
- /* Check fflush after a backup ungetc() call. This is case 1 in terms of
- <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>.
- The Austin Group has not yet decided how this should behave. */
-#endif
-#if 0
- /* Check fflush after a non-backup ungetc() call. This is case 2 in terms of
- <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>.
- The Austin Group has not yet decided how this should behave. */
- /* Check that fflush after a non-backup ungetc() call discards the ungetc
- buffer. This is mandated by POSIX
- <http://www.opengroup.org/susv3/functions/ungetc.html>:
- "The value of the file-position indicator for the stream after
- reading or discarding all pushed-back bytes shall be the same
- as it was before the bytes were pushed back." */
int c;
- c = fgetc (stdin);
- ASSERT (c == '#');
+ /* Avoid the well-known bugs of fflush() on streams in O_TEXT mode
+ on native Windows platforms. */
+ SET_BINARY (0);
- c = fgetc (stdin);
- ASSERT (c == '!');
+ if (argc > 1)
+ switch (argv[1][0])
+ {
+ case '1':
+ /* Check fflush after a backup ungetc() call. This is case 1a in
+ terms of
+ <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>,
+ according to the Austin Group's resolution on 2009-01-08. */
- /* Here the file-position indicator must be 2. */
+ c = fgetc (stdin);
+ ASSERT (c == '#');
- c = ungetc ('@', stdin);
- ASSERT (c == '@');
+ c = fgetc (stdin);
+ ASSERT (c == '!');
- fflush (stdin);
+ /* Here the file-position indicator must be 2. */
- /* Here the file-position indicator must be 2 again. */
+ c = ungetc ('!', stdin);
+ ASSERT (c == '!');
- c = fgetc (stdin);
- ASSERT (c == '/');
-#endif
+ fflush (stdin);
- return 0;
+ /* Here the file-position indicator must be 1. */
+
+ c = fgetc (stdin);
+ ASSERT (c == '!');
+
+ c = fgetc (stdin);
+ ASSERT (c == '/');
+
+ return 0;
+
+ case '2':
+ /* Check fflush after a non-backup ungetc() call. This is case 2a in
+ terms of
+ <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>,
+ according to the Austin Group's resolution on 2009-01-08. */
+ /* Check that fflush after a non-backup ungetc() call discards the
+ ungetc buffer. This is mandated by POSIX
+ <http://www.opengroup.org/susv3/functions/ungetc.html>:
+ "The value of the file-position indicator for the stream after
+ reading or discarding all pushed-back bytes shall be the same
+ as it was before the bytes were pushed back."
+ <http://www.opengroup.org/austin/aardvark/latest/xshbug3.txt>
+ "[After fflush(),] the file offset of the underlying open file
+ description shall be set to the file position of the stream, and
+ any characters pushed back onto the stream by ungetc() or
+ ungetwc() that have not subsequently been read from the stream
+ shall be discarded." */
+
+ c = fgetc (stdin);
+ ASSERT (c == '#');
+
+ c = fgetc (stdin);
+ ASSERT (c == '!');
+
+ /* Here the file-position indicator must be 2. */
+
+ c = ungetc ('@', stdin);
+ ASSERT (c == '@');
+
+ fflush (stdin);
+
+ /* Here the file-position indicator must be 1. */
+
+ c = fgetc (stdin);
+ ASSERT (c == '!');
+
+ c = fgetc (stdin);
+ ASSERT (c == '/');
+
+ return 0;
+ }
+
+ return 1;
}