diff options
Diffstat (limited to 'lib/fpurge.c')
-rw-r--r-- | lib/fpurge.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/lib/fpurge.c b/lib/fpurge.c deleted file mode 100644 index 5c53ee763..000000000 --- a/lib/fpurge.c +++ /dev/null @@ -1,137 +0,0 @@ -/* Flushing buffers of a FILE stream. - Copyright (C) 2007-2011 Free Software Foundation, Inc. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU Lesser General Public License as published by - 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 Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#include <config.h> - -/* Specification. */ -#include <stdio.h> - -#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */ -# include <stdio_ext.h> -#endif -#include <stdlib.h> - -#include "stdio-impl.h" - -int -fpurge (FILE *fp) -{ -#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */ - - __fpurge (fp); - /* The __fpurge function does not have a return value. */ - return 0; - -#elif HAVE_FPURGE /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin 1.7 */ - - /* Call the system's fpurge function. */ -# undef fpurge -# if !HAVE_DECL_FPURGE - extern int fpurge (FILE *); -# endif - int result = fpurge (fp); -# if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ - if (result == 0) - /* Correct the invariants that fpurge broke. - <stdio.h> on BSD systems says: - "The following always hold: if _flags & __SRD, _w is 0." - If this invariant is not fulfilled and the stream is read-write but - currently reading, subsequent putc or fputc calls will write directly - into the buffer, although they shouldn't be allowed to. */ - if ((fp_->_flags & __SRD) != 0) - fp_->_w = 0; -# endif - return result; - -#else - - /* Most systems provide FILE as a struct and the necessary bitmask in - <stdio.h>, because they need it for implementing getc() and putc() as - fast macros. */ -# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ - fp->_IO_read_end = fp->_IO_read_ptr; - fp->_IO_write_ptr = fp->_IO_write_base; - /* Avoid memory leak when there is an active ungetc buffer. */ - if (fp->_IO_save_base != NULL) - { - free (fp->_IO_save_base); - fp->_IO_save_base = NULL; - } - return 0; -# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ - 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); - /* Avoid memory leak when there is an active ungetc buffer. */ - if (fp_ub._base != NULL) - { - if (fp_ub._base != fp_->_ubuf) - free (fp_ub._base); - fp_ub._base = NULL; - } - return 0; -# elif defined __EMX__ /* emx+gcc */ - fp->_ptr = fp->_buffer; - fp->_rcount = 0; - fp->_wcount = 0; - fp->_ungetc_count = 0; - return 0; -# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */ - fp->_ptr = fp->_base; - if (fp->_ptr != NULL) - fp->_cnt = 0; - return 0; -# elif defined __UCLIBC__ /* uClibc */ -# ifdef __STDIO_BUFFERS - if (fp->__modeflags & __FLAG_WRITING) - fp->__bufpos = fp->__bufstart; - else if (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) - fp->__bufpos = fp->__bufread; -# endif - return 0; -# elif defined __QNX__ /* QNX */ - fp->_Rback = fp->_Back + sizeof (fp->_Back); - fp->_Rsave = NULL; - if (fp->_Mode & 0x2000 /* _MWRITE */) - /* fp->_Buf <= fp->_Next <= fp->_Wend */ - fp->_Next = fp->_Buf; - else - /* fp->_Buf <= fp->_Next <= fp->_Rend */ - fp->_Rend = fp->_Next; - return 0; -# elif defined __MINT__ /* Atari FreeMiNT */ - if (fp->__pushed_back) - { - fp->__bufp = fp->__pushback_bufp; - fp->__pushed_back = 0; - } - /* Preserve the current file position. */ - if (fp->__target != -1) - fp->__target += fp->__bufp - fp->__buffer; - fp->__bufp = fp->__buffer; - /* Nothing in the buffer, next getc is nontrivial. */ - fp->__get_limit = fp->__bufp; - /* Nothing in the buffer, next putc is nontrivial. */ - fp->__put_limit = fp->__buffer; - return 0; -# else -# error "Please port gnulib fpurge.c to your platform! Look at the definitions of fflush, setvbuf and ungetc on your system, then report this to bug-gnulib." -# endif - -#endif -} |