/* An ftello() function that works around platform bugs.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2009-2013 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Get lseek. */
#include <unistd.h>
+#include "stdio-impl.h"
+
+off_t
+ftello (FILE *fp)
#undef ftello
#if !HAVE_FTELLO
# undef ftell
# define ftello ftell
#endif
-
-off_t
-rpl_ftello (FILE *fp)
+#if _GL_WINDOWS_64_BIT_OFF_T
+# undef ftello
+# if HAVE__FTELLI64 /* msvc, mingw64 */
+# define ftello _ftelli64
+# else /* mingw */
+# define ftello ftello64
+# endif
+#endif
{
#if LSEEK_PIPE_BROKEN
/* mingw gives bogus answers rather than failure on non-seekable files. */
return -1;
#endif
+#if FTELLO_BROKEN_AFTER_SWITCHING_FROM_READ_TO_WRITE /* Solaris */
+ /* The Solaris stdio leaves the _IOREAD flag set after reading from a file
+ reaches EOF and the program then starts writing to the file. ftello
+ gets confused by this. */
+ if (fp_->_flag & _IOWRT)
+ {
+ off_t pos;
+
+ /* Call ftello nevertheless, for the side effects that it does on fp. */
+ ftello (fp);
+
+ /* Compute the file position ourselves. */
+ pos = lseek (fileno (fp), (off_t) 0, SEEK_CUR);
+ if (pos >= 0)
+ {
+ if ((fp_->_flag & _IONBF) == 0 && fp_->_base != NULL)
+ pos += fp_->_ptr - fp_->_base;
+ }
+ return pos;
+ }
+#endif
+
#if defined __SL64 && defined __SCLE /* Cygwin */
if ((fp->_flags & __SL64) == 0)
{
/* Cygwin 1.5.0 through 1.5.24 failed to open stdin in 64-bit
- mode; but has an ftello that requires 64-bit mode. */
+ mode; but has an ftello that requires 64-bit mode. */
FILE *tmp = fopen ("/dev/null", "r");
if (!tmp)
- return -1;
+ return -1;
fp->_flags |= __SL64;
fp->_seek64 = tmp->_seek64;
fclose (tmp);