1 /* Implementation details of FILE streams. 2 Copyright (C) 2007-2008, 2010-2012 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 /* Many stdio implementations have the same logic and therefore can share 18 the same implementation of stdio extension API, except that some fields 19 have different naming conventions, or their access requires some casts. */ 20 21 22 /* BSD stdio derived implementations. */ 23 24 #if defined __NetBSD__ /* NetBSD */ 25 /* Get __NetBSD_Version__. */ 26 # include <sys/param.h> 27 #endif 28 29 #include <errno.h> /* For detecting Plan9. */ 30 31 #if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */ 32 33 # if defined __DragonFly__ /* DragonFly */ 34 /* See <http://www.dragonflybsd.org/cvsweb/src/lib/libc/stdio/priv_stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>. */ 35 # define fp_ ((struct { struct __FILE_public pub; \ 36 struct { unsigned char *_base; int _size; } _bf; \ 37 void *cookie; \ 38 void *_close; \ 39 void *_read; \ 40 void *_seek; \ 41 void *_write; \ 42 struct { unsigned char *_base; int _size; } _ub; \ 43 int _ur; \ 44 unsigned char _ubuf[3]; \ 45 unsigned char _nbuf[1]; \ 46 struct { unsigned char *_base; int _size; } _lb; \ 47 int _blksize; \ 48 fpos_t _offset; \ 49 /* More fields, not relevant here. */ \ 50 } *) fp) 51 /* See <http://www.dragonflybsd.org/cvsweb/src/include/stdio.h?rev=HEAD&content-type=text/x-cvsweb-markup>. */ 52 # define _p pub._p 53 # define _flags pub._flags 54 # define _r pub._r 55 # define _w pub._w 56 # else 57 # define fp_ fp 58 # endif 59 60 # if (defined __NetBSD__ && __NetBSD_Version__ >= 105270000) || defined __OpenBSD__ /* NetBSD >= 1.5ZA, OpenBSD */ 61 /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> 62 and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */ 63 struct __sfileext 64 { 65 struct __sbuf _ub; /* ungetc buffer */ 66 /* More fields, not relevant here. */ 67 }; 68 # define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub 69 # else /* FreeBSD, NetBSD <= 1.5Z, DragonFly, Mac OS X, Cygwin */ 70 # define fp_ub fp_->_ub 71 # endif 72 73 # define HASUB(fp) (fp_ub._base != NULL) 74 75 #endif 76 77 78 /* SystemV derived implementations. */ 79 80 #ifdef __TANDEM /* NonStop Kernel */ 81 # ifndef _IOERR 82 /* These values were determined by the program 'stdioext-flags' at 83 <http://lists.gnu.org/archive/html/bug-gnulib/2010-12/msg00165.html>. */ 84 # define _IOERR 0x40 85 # define _IOREAD 0x80 86 # define _IOWRT 0x4 87 # define _IORW 0x100 88 # endif 89 #endif 90 91 #if defined _IOERR 92 93 # if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */ 94 # define fp_ ((struct { unsigned char *_ptr; \ 95 unsigned char *_base; \ 96 unsigned char *_end; \ 97 long _cnt; \ 98 int _file; \ 99 unsigned int _flag; \ 100 } *) fp) 101 # else 102 # define fp_ fp 103 # endif 104 105 # if defined _SCO_DS /* OpenServer */ 106 # define _cnt __cnt 107 # define _ptr __ptr 108 # define _base __base 109 # define _flag __flag 110 # endif 111 112 #endif 113