X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftest-fwriting.c;h=f2ae068a25544f8b3461135869a07d26a71c2a9e;hb=217fb89cd467efe0ae1668ac1b69d5cc4742e79b;hp=24279f313ae4c493a0a83d0ce95d9a1bc4f0eac5;hpb=a8f956440539cf954fb92e2396cc58e2a111455f;p=gnulib.git
diff --git a/tests/test-fwriting.c b/tests/test-fwriting.c
index 24279f313..f2ae068a2 100644
--- a/tests/test-fwriting.c
+++ b/tests/test-fwriting.c
@@ -1,10 +1,10 @@
/* Test of fwriting() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2008 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
/* Written by Bruno Haible , 2007. */
@@ -21,9 +20,20 @@
#include "fwriting.h"
+#include
#include
-#define ASSERT(expr) if (!(expr)) abort ();
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
#define TESTFILE "t-fwriting.tmp"
@@ -57,6 +67,11 @@ main ()
if (fgetc (fp) != 'b')
goto skip;
ASSERT (!fwriting (fp));
+ fflush (fp);
+ ASSERT (!fwriting (fp));
+ if (fgetc (fp) != 'a')
+ goto skip;
+ ASSERT (!fwriting (fp));
if (fseek (fp, 0, SEEK_END))
goto skip;
ASSERT (!fwriting (fp));
@@ -68,6 +83,7 @@ main ()
fwriting is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
after fflush. */
+ /* First a scenario with only fgetc, fseek, fputc. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
@@ -81,14 +97,59 @@ main ()
if (fgetc (fp) != 'b')
goto skip;
ASSERT (!fwriting (fp));
+ /* This fseek call is necessary when switching from reading to writing.
+ See the description of fopen(), ISO C 99 7.19.5.3.(6). */
if (fseek (fp, 0, SEEK_CUR) != 0)
goto skip;
+ ASSERT (!fwriting (fp));
+ if (fputc ('x', fp) != 'x')
+ goto skip;
+ ASSERT (fwriting (fp));
+ if (fseek (fp, 0, SEEK_END))
+ goto skip;
+ /* freading (fp) is undefined here, because on some implementations (e.g.
+ glibc) fseek causes a buffer to be read.
+ fwriting (fp) is undefined as well. */
+ if (fclose (fp))
+ goto skip;
+
+ /* Open it in read-write mode. POSIX requires a reposition (fseek,
+ fsetpos, rewind) or fflush when transitioning from write to read,
+ fwriting is only deterministic after input or output, but this
+ test case should be portable even on open, after reposition, and
+ after fflush. */
+ /* Here a scenario that includes fflush. */
+ fp = fopen (TESTFILE, "r+");
+ if (fp == NULL)
+ goto skip;
+ ASSERT (!fwriting (fp));
+ if (fgetc (fp) != 'f')
+ goto skip;
+ ASSERT (!fwriting (fp));
+ if (fseek (fp, 2, SEEK_CUR))
+ goto skip;
+ ASSERT (!fwriting (fp));
+ if (fgetc (fp) != 'b')
+ goto skip;
+ ASSERT (!fwriting (fp));
+ fflush (fp);
+ ASSERT (!fwriting (fp));
+ if (fgetc (fp) != 'x')
+ goto skip;
+ ASSERT (!fwriting (fp));
+ /* This fseek call is necessary when switching from reading to writing.
+ See the description of fopen(), ISO C 99 7.19.5.3.(6). */
+ if (fseek (fp, 0, SEEK_CUR) != 0)
+ goto skip;
+ ASSERT (!fwriting (fp));
if (fputc ('z', fp) != 'z')
goto skip;
ASSERT (fwriting (fp));
if (fseek (fp, 0, SEEK_END))
goto skip;
- /* fwriting (fp) is undefined here, but freading is false. */
+ /* freading (fp) is undefined here, because on some implementations (e.g.
+ glibc) fseek causes a buffer to be read.
+ fwriting (fp) is undefined as well. */
if (fclose (fp))
goto skip;