| /* Implementation details of FILE streams. |
| Copyright (C) 2007-2008, 2010-2019 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 <https://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. */ |
| |
| /* Glibc 2.28 made _IO_UNBUFFERED and _IO_IN_BACKUP private. For now, work |
| around this problem by defining them ourselves. FIXME: Do not rely on glibc |
| internals. */ |
| #if defined _IO_EOF_SEEN |
| # if !defined _IO_UNBUFFERED |
| # define _IO_UNBUFFERED 0x2 |
| # endif |
| # if !defined _IO_IN_BACKUP |
| # define _IO_IN_BACKUP 0x100 |
| # endif |
| #endif |
| |
| /* BSD stdio derived implementations. */ |
| |
| #if defined __NetBSD__ /* NetBSD */ |
| /* Get __NetBSD_Version__. */ |
| # include <sys/param.h> |
| #endif |
| |
| #include <errno.h> /* For detecting Plan9. */ |
| |
| #if defined __sferror || defined __DragonFly__ || defined __ANDROID__ |
| /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */ |
| |
| # if defined __DragonFly__ /* DragonFly */ |
| /* See <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdio/priv_stdio.h>. */ |
| # 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 <https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/include/stdio.h>. */ |
| # define _p pub._p |
| # define _flags pub._flags |
| # define _r pub._r |
| # define _w pub._w |
| # elif defined __ANDROID__ /* Android */ |
| # ifdef __LP64__ |
| # define _gl_flags_file_t int |
| # else |
| # define _gl_flags_file_t short |
| # endif |
| /* Up to this commit from 2015-10-12 |
| <https://android.googlesource.com/platform/bionic.git/+/f0141dfab10a4b332769d52fa76631a64741297a> |
| the innards of FILE were public, and fp_ub could be defined like for OpenBSD, |
| see <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/fileext.h> |
| and <https://android.googlesource.com/platform/bionic.git/+/e78392637d5086384a5631ddfdfa8d7ec8326ee3/libc/stdio/local.h>. |
| After this commit, the innards of FILE are hidden. */ |
| # define fp_ ((struct { unsigned char *_p; \ |
| int _r; \ |
| int _w; \ |
| _gl_flags_file_t _flags; \ |
| _gl_flags_file_t _file; \ |
| struct { unsigned char *_base; size_t _size; } _bf; \ |
| int _lbfsize; \ |
| void *_cookie; \ |
| void *_close; \ |
| void *_read; \ |
| void *_seek; \ |
| void *_write; \ |
| struct { unsigned char *_base; size_t _size; } _ext; \ |
| unsigned char *_up; \ |
| int _ur; \ |
| unsigned char _ubuf[3]; \ |
| unsigned char _nbuf[1]; \ |
| struct { unsigned char *_base; size_t _size; } _lb; \ |
| int _blksize; \ |
| fpos_t _offset; \ |
| /* More fields, not relevant here. */ \ |
| } *) fp) |
| # else |
| # define fp_ fp |
| # endif |
| |
| # if (defined __NetBSD__ && __NetBSD_Version__ >= 105270000) || defined __OpenBSD__ || defined __minix /* NetBSD >= 1.5ZA, OpenBSD, Minix 3 */ |
| /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> |
| and <https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> |
| and <https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/master/lib/libc/stdio/fileext.h> */ |
| struct __sfileext |
| { |
| struct __sbuf _ub; /* ungetc buffer */ |
| /* More fields, not relevant here. */ |
| }; |
| # define fp_ub ((struct __sfileext *) fp->_ext._base)->_ub |
| # elif defined __ANDROID__ /* Android */ |
| struct __sfileext |
| { |
| struct { unsigned char *_base; size_t _size; } _ub; /* ungetc buffer */ |
| /* More fields, not relevant here. */ |
| }; |
| # define fp_ub ((struct __sfileext *) fp_->_ext._base)->_ub |
| # else /* FreeBSD, NetBSD <= 1.5Z, DragonFly, Mac OS X, Cygwin */ |
| # define fp_ub fp_->_ub |
| # endif |
| |
| # define HASUB(fp) (fp_ub._base != NULL) |
| |
| # if defined __ANDROID__ /* Android */ |
| /* Needed after this commit from 2016-01-25 |
| <https://android.googlesource.com/platform/bionic.git/+/e70e0e9267d069bf56a5078c99307e08a7280de7> */ |
| # ifndef __SEOF |
| # define __SLBF 1 |
| # define __SNBF 2 |
| # define __SRD 4 |
| # define __SWR 8 |
| # define __SRW 0x10 |
| # define __SEOF 0x20 |
| # define __SERR 0x40 |
| # endif |
| # ifndef __SOFF |
| # define __SOFF 0x1000 |
| # endif |
| # endif |
| |
| #endif |
| |
| |
| /* SystemV derived implementations. */ |
| |
| #ifdef __TANDEM /* NonStop Kernel */ |
| # ifndef _IOERR |
| /* These values were determined by the program 'stdioext-flags' at |
| <https://lists.gnu.org/r/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) |
| # elif defined __VMS /* OpenVMS */ |
| # define fp_ ((struct _iobuf *) fp) |
| # else |
| # define fp_ fp |
| # endif |
| |
| # if defined _SCO_DS /* OpenServer */ |
| # define _cnt __cnt |
| # define _ptr __ptr |
| # define _base __base |
| # define _flag __flag |
| # endif |
| |
| #elif defined _WIN32 && ! defined __CYGWIN__ /* newer Windows with MSVC */ |
| |
| /* <stdio.h> does not define the innards of FILE any more. */ |
| # define WINDOWS_OPAQUE_FILE |
| |
| struct _gl_real_FILE |
| { |
| /* Note: Compared to older Windows and to mingw, it has the fields |
| _base and _cnt swapped. */ |
| unsigned char *_ptr; |
| unsigned char *_base; |
| int _cnt; |
| int _flag; |
| int _file; |
| int _charbuf; |
| int _bufsiz; |
| }; |
| # define fp_ ((struct _gl_real_FILE *) fp) |
| |
| /* These values were determined by a program similar to the one at |
| <https://lists.gnu.org/r/bug-gnulib/2010-12/msg00165.html>. */ |
| # define _IOREAD 0x1 |
| # define _IOWRT 0x2 |
| # define _IORW 0x4 |
| # define _IOEOF 0x8 |
| # define _IOERR 0x10 |
| |
| #endif |