diff options
Diffstat (limited to 'lib/stdio-impl.h')
| -rw-r--r-- | lib/stdio-impl.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/lib/stdio-impl.h b/lib/stdio-impl.h new file mode 100644 index 0000000..d41c32f --- /dev/null +++ b/lib/stdio-impl.h @@ -0,0 +1,110 @@ +/* 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 |