/* An fseeko() function that, together with fflush(), is POSIX compliant.
- Copyright (C) 2007-2009 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 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
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. */
+ with this program; if not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdio.h>
-/* Get off_t and lseek. */
+/* Get off_t, lseek, _POSIX_VERSION. */
#include <unistd.h>
#include "stdio-impl.h"
+int
+fseeko (FILE *fp, off_t offset, int whence)
#undef fseeko
#if !HAVE_FSEEKO
# undef fseek
# define fseeko fseek
#endif
-
-int
-rpl_fseeko (FILE *fp, off_t offset, int whence)
+#if _GL_WINDOWS_64_BIT_OFF_T
+# undef fseeko
+# if HAVE__FSEEKI64 /* msvc, mingw64 */
+# define fseeko _fseeki64
+# else /* mingw */
+# define fseeko fseeko64
+# endif
+#endif
{
#if LSEEK_PIPE_BROKEN
/* mingw gives bogus answers rather than failure on non-seekable files. */
if (fp->_IO_read_end == fp->_IO_read_ptr
&& fp->_IO_write_ptr == fp->_IO_write_base
&& fp->_IO_save_base == NULL)
-#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
# 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 fseeko that requires 64-bit mode. */
+ mode; but has an fseeko 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);
if (fp_->_p == fp_->_bf._base
&& fp_->_r == 0
&& fp_->_w == ((fp_->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
- ? fp_->_bf._size
- : 0)
+ ? fp_->_bf._size
+ : 0)
&& fp_ub._base == NULL)
#elif defined __EMX__ /* emx+gcc */
if (fp->_ptr == fp->_buffer
&& fp->_rcount == 0
&& fp->_wcount == 0
&& fp->_ungetc_count == 0)
-#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
+#elif defined __minix /* Minix */
+ if (fp_->_ptr == fp_->_buf
+ && (fp_->_ptr == NULL || fp_->_count == 0))
+#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
if (fp_->_ptr == fp_->_base
&& (fp_->_ptr == NULL || fp_->_cnt == 0))
#elif defined __UCLIBC__ /* uClibc */
if (((fp->__modeflags & __FLAG_WRITING) == 0
|| fp->__bufpos == fp->__bufstart)
&& ((fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) == 0
- || fp->__bufpos == fp->__bufread))
+ || fp->__bufpos == fp->__bufread))
#elif defined __QNX__ /* QNX */
- if ((fp->_Mode & _MWRITE ? fp->_Next == fp->_Buf : fp->_Next == fp->_Rend)
+ if ((fp->_Mode & 0x2000 /* _MWRITE */ ? fp->_Next == fp->_Buf : fp->_Next == fp->_Rend)
&& fp->_Rback == fp->_Back + sizeof (fp->_Back)
&& fp->_Rsave == NULL)
+#elif defined __MINT__ /* Atari FreeMiNT */
+ if (fp->__bufp == fp->__buffer
+ && fp->__get_limit == fp->__bufp
+ && fp->__put_limit == fp->__bufp
+ && !fp->__pushed_back)
+#elif defined EPLAN9 /* Plan9 */
+ if (fp->rp == fp->buf
+ && fp->wp == fp->buf)
+#elif FUNC_FFLUSH_STDIN < 0 && 200809 <= _POSIX_VERSION
+ /* Cross-compiling to some other system advertising conformance to
+ POSIX.1-2008 or later. Assume fseeko and fflush work as advertised.
+ If this assumption is incorrect, please report the bug to
+ bug-gnulib. */
+ if (0)
#else
- #error "Please port gnulib fseeko.c to your platform! Look at the code in fpurge.c, then report this to bug-gnulib."
+ #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib."
#endif
{
- /* We get here when an fflush() call immediately preceded this one. We
- know there are no buffers.
- POSIX requires us to modify the file descriptor's position.
- But we cannot position beyond end of file here. */
- off_t pos =
- lseek (fileno (fp),
- whence == SEEK_END && offset > 0 ? 0 : offset,
- whence);
+ /* We get here when an fflush() call immediately preceded this one (or
+ if ftell() has created buffers but no I/O has occurred on a
+ newly-opened stream). We know there are no buffers. */
+ off_t pos = lseek (fileno (fp), offset, whence);
if (pos == -1)
- {
-#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
- fp_->_flags &= ~__SOFF;
+ {
+#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
+ fp_->_flags &= ~__SOFF;
#endif
- return -1;
- }
+ return -1;
+ }
#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
fp->_flags &= ~_IO_EOF_SEEN;
-#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+ fp->_offset = pos;
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
+# if defined __CYGWIN__
+ /* fp_->_offset is typed as an integer. */
fp_->_offset = pos;
+# else
+ /* fp_->_offset is an fpos_t. */
+ {
+ /* Use a union, since on NetBSD, the compilation flags
+ determine whether fpos_t is typedef'd to off_t or a struct
+ containing a single off_t member. */
+ union
+ {
+ fpos_t f;
+ off_t o;
+ } u;
+ u.o = pos;
+ fp_->_offset = u.f;
+ }
+# endif
fp_->_flags |= __SOFF;
fp_->_flags &= ~__SEOF;
#elif defined __EMX__ /* emx+gcc */
fp->_flags &= ~_IOEOF;
-#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
+#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
fp->_flag &= ~_IOEOF;
+#elif defined __MINT__ /* Atari FreeMiNT */
+ fp->__offset = pos;
+ fp->__eof = 0;
#endif
- /* If we were not requested to position beyond end of file, we're
- done. */
- if (!(whence == SEEK_END && offset > 0))
- return 0;
+ return 0;
}
return fseeko (fp, offset, whence);
}
projects / gnulib.git / blobdiff