1 /* Implementation details of FILE streams.
2 Copyright (C) 2007-2008, 2010-2018 Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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. */
21 /* Glibc 2.28 made _IO_IN_BACKUP private. For now, work around this
22 problem by defining it ourselves. FIXME: Do not rely on glibc
24 #if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
25 # define _IO_IN_BACKUP 0x100
28 /* BSD stdio derived implementations. */
30 #if defined __NetBSD__ /* NetBSD */
31 /* Get __NetBSD_Version__. */
32 # include <sys/param.h>
35 #include <errno.h> /* For detecting Plan9. */
37 #if defined __sferror || defined __DragonFly__ || defined __ANDROID__
38 /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */
40 # if defined __DragonFly__ /* DragonFly */
41 /* See <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdio/priv_stdio.h>. */
42 # define fp_ ((struct { struct __FILE_public pub; \
43 struct { unsigned char *_base; int _size; } _bf; \
49 struct { unsigned char *_base; int _size; } _ub; \
51 unsigned char _ubuf[3]; \
52 unsigned char _nbuf[1]; \
53 struct { unsigned char *_base; int _size; } _lb; \
56 /* More fields, not relevant here. */ \
58 /* See <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/include/stdio.h>. */
60 # define _flags pub._flags
63 # elif defined __ANDROID__ /* Android */
64 /* Up to this commit from 2015-10-12
65 <https://android.googlesource.com/platform/bionic.git/+/f0141dfab10a4b332769d52fa76631a64741297a>
66 the innards of FILE were public, and fp_ub could be defined like for OpenBSD,
67 see <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/fileext.h>
68 and <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/local.h>.
69 After this commit, the innards of FILE are hidden. */
70 # define fp_ ((struct { unsigned char *_p; \
75 struct { unsigned char *_base; size_t _size; } _bf; \
82 struct { unsigned char *_base; size_t _size; } _ext; \
85 unsigned char _ubuf[3]; \
86 unsigned char _nbuf[1]; \
87 struct { unsigned char *_base; size_t _size; } _lb; \
90 /* More fields, not relevant here. */ \
96 # if (defined __NetBSD__ && __NetBSD_Version__ >= 105270000) || defined __OpenBSD__ || defined __minix /* NetBSD >= 1.5ZA, OpenBSD, Minix 3 */
97 /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
98 and <https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
99 and <https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/master/lib/libc/stdio/fileext.h> */
102 struct __sbuf _ub
; /* ungetc buffer */
103 /* More fields, not relevant here. */
105 # define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub
106 # elif defined __ANDROID__ /* Android */
109 struct { unsigned char *_base
; size_t _size
; } _ub
; /* ungetc buffer */
110 /* More fields, not relevant here. */
112 # define fp_ub ((struct __sfileext *) fp_->_ext._base)->_ub
113 # else /* FreeBSD, NetBSD <= 1.5Z, DragonFly, Mac OS X, Cygwin */
114 # define fp_ub fp_->_ub
117 # define HASUB(fp) (fp_ub._base != NULL)
119 # if defined __ANDROID__ /* Android */
120 /* Needed after this commit from 2016-01-25
121 <https://android.googlesource.com/platform/bionic.git/+/e70e0e9267d069bf56a5078c99307e08a7280de7> */
132 # define __SOFF 0x1000
139 /* SystemV derived implementations. */
141 #ifdef __TANDEM /* NonStop Kernel */
143 /* These values were determined by the program 'stdioext-flags' at
144 <https://lists.gnu.org/r/bug-gnulib/2010-12/msg00165.html>. */
146 # define _IOREAD 0x80
154 # if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
155 # define fp_ ((struct { unsigned char *_ptr; \
156 unsigned char *_base; \
157 unsigned char *_end; \
160 unsigned int _flag; \
162 # elif defined __VMS /* OpenVMS */
163 # define fp_ ((struct _iobuf *) fp)
168 # if defined _SCO_DS /* OpenServer */
171 # define _base __base
172 # define _flag __flag
175 #elif defined _WIN32 && ! defined __CYGWIN__ /* newer Windows with MSVC */
177 /* <stdio.h> does not define the innards of FILE any more. */
178 # define WINDOWS_OPAQUE_FILE
182 /* Note: Compared to older Windows and to mingw, it has the fields
183 _base and _cnt swapped. */
185 unsigned char *_base
;
192 # define fp_ ((struct _gl_real_FILE *) fp)
194 /* These values were determined by a program similar to the one at
195 <https://lists.gnu.org/r/bug-gnulib/2010-12/msg00165.html>. */