gettimeofday: port recent C++ fix to Emacs

[gnulib.git] / tests / test-fflush2.c

diff --git a/tests/test-fflush2.c b/tests/test-fflush2.c
index d5d8619..90684b2 100644 (file)
--- a/tests/test-fflush2.c
+++ b/tests/test-fflush2.c
@@ -1,5 +1,5 @@
 /* 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
@@ -18,61 +18,91 @@
 
 #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__); \
-          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)
 {
-  /* 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 == '/');
+        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;
 }