+
−/* Implementation details of FILE streams.
+
−   Copyright (C) 2007-2008, 2010-2011 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
+
−   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, see <http://www.gnu.org/licenses/>.  */
+
−
+
−/* Many stdio implementations have the same logic and therefore can share
+
−   the same implementation of stdio extension API, except that some fields
+
−   have different naming conventions, or their access requires some casts.  */
+
−
+
−
+
−/* BSD stdio derived implementations.  */
+
−
+
−#if defined __NetBSD__                         /* NetBSD */
+
−/* Get __NetBSD_Version__.  */
+
−# include <sys/param.h>
+
−#endif
+
−
+
−#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+
−
+
−# if defined __DragonFly__          /* DragonFly */
+
−  /* See <http://www.dragonflybsd.org/cvsweb/src/lib/libc/stdio/priv_stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>.  */
+
−#  define fp_ ((struct { struct __FILE_public pub; \
+
−                         struct { unsigned char *_base; int _size; } _bf; \
+
−                         void *cookie; \
+
−                         void *_close; \
+
−                         void *_read; \
+
−                         void *_seek; \
+
−                         void *_write; \
+
−                         struct { unsigned char *_base; int _size; } _ub; \
+
−                         int _ur; \
+
−                         unsigned char _ubuf[3]; \
+
−                         unsigned char _nbuf[1]; \
+
−                         struct { unsigned char *_base; int _size; } _lb; \
+
−                         int _blksize; \
+
−                         fpos_t _offset; \
+
−                         /* More fields, not relevant here.  */ \
+
−                       } *) fp)
+
−  /* See <http://www.dragonflybsd.org/cvsweb/src/include/stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>.  */
+
−#  define _p pub._p
+
−#  define _flags pub._flags
+
−#  define _r pub._r
+
−#  define _w pub._w
+
−# else
+
−#  define fp_ fp
+
−# endif
+
−
+
−# if (defined __NetBSD__ && __NetBSD_Version__ >= 105270000) || defined __OpenBSD__ /* NetBSD >= 1.5ZA, OpenBSD */
+
−  /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
+
−     and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */
+
−  struct __sfileext
+
−    {
+
−      struct  __sbuf _ub; /* ungetc buffer */
+
−      /* More fields, not relevant here.  */
+
−    };
+
−#  define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub
+
−# else                                         /* FreeBSD, NetBSD <= 1.5Z, DragonFly, MacOS X, Cygwin */
+
−#  define fp_ub fp_->_ub
+
−# endif
+
−
+
−# define HASUB(fp) (fp_ub._base != NULL)
+
−
+
−#endif
+
−
+
−
+
−/* SystemV derived implementations.  */
+
−
+
−#ifdef __TANDEM                     /* NonStop Kernel */
+
−# ifndef _IOERR
+
−/* These values were determined by the program 'stdioext-flags' at
+
−   <http://lists.gnu.org/archive/html/bug-gnulib/2010-12/msg00165.html>.  */
+
−#  define _IOERR   0x40
+
−#  define _IOREAD  0x80
+
−#  define _IOWRT    0x4
+
−#  define _IORW   0x100
+
−# endif
+
−#endif
+
−
+
−#if defined _IOERR
+
−
+
−# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
+
−#  define fp_ ((struct { unsigned char *_ptr; \
+
−                         unsigned char *_base; \
+
−                         unsigned char *_end; \
+
−                         long _cnt; \
+
−                         int _file; \
+
−                         unsigned int _flag; \
+
−                       } *) fp)
+
−# else
+
−#  define fp_ fp
+
−# endif
+
−
+
−# if defined _SCO_DS                /* OpenServer */
+
−#  define _cnt __cnt
+
−#  define _ptr __ptr
+
−#  define _base __base
+
−#  define _flag __flag
+
−# endif
+
−
+
−#endif