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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
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/* Implementation details of FILE streams.
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Copyright (C) 2007-2008 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Many stdio implementations have the same logic and therefore can share
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the same implementation of stdio extension API, except that some fields
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have different naming conventions, or their access requires some casts. */
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/* BSD stdio derived implementations. */
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#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
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# if defined __DragonFly__ /* DragonFly */
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/* See <http://www.dragonflybsd.org/cvsweb/src/lib/libc/stdio/priv_stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>. */
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# define fp_ ((struct { struct __FILE_public pub; \
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struct { unsigned char *_base; int _size; } _bf; \
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void *cookie; \
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void *_close; \
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void *_read; \
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void *_seek; \
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void *_write; \
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struct { unsigned char *_base; int _size; } _ub; \
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int _ur; \
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unsigned char _ubuf[3]; \
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unsigned cahr _nbuf[1]; \
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struct { unsigned char *_base; int _size; } _lb; \
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int _blksize; \
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fpos_t _offset; \
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/* More fields, not relevant here. */ \
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} *) fp)
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/* See <http://www.dragonflybsd.org/cvsweb/src/include/stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>. */
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# define _p pub._p
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# define _flags pub._flags
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# define _r pub._r
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# define _w pub._w
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# else
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# define fp_ fp
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# endif
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# if defined __NetBSD__ || defined __OpenBSD__ /* NetBSD, OpenBSD */
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/* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
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and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */
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struct __sfileext
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{
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struct __sbuf _ub; /* ungetc buffer */
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/* More fields, not relevant here. */
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};
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# define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub
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# else /* FreeBSD, DragonFly, MacOS X, Cygwin */
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# define fp_ub fp->_ub
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# endif
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# define HASUB(fp) (fp_ub._base != NULL)
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#endif
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/* SystemV derived implementations. */
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#if defined _IOERR
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# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
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# define fp_ ((struct { unsigned char *_ptr; \
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unsigned char *_base; \
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unsigned char *_end; \
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long _cnt; \
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int _file; \
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unsigned int _flag; \
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} *) fp)
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# else
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# define fp_ fp
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# endif
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# if defined _SCO_DS /* OpenServer */
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# define _cnt __cnt
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# define _ptr __ptr
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# define _base __base
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# define _flag __flag
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# endif
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#endif
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