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63fb8f9aa9
Nearly everything in _G_config.h is either junk or more appropriately defined elsewhere: * _G_fpos_t, _G_fpos64_t, and _G_BUFSIZ are already completely unused. * All remaining uses of _G_va_list have been changed to __gnuc_va_list. * The definition of _G_HAVE_ST_BLKSIZE/_IO_HAVE_ST_BLKSIZE has been inlined into its sole use. * The complete definition of _G_iconv_t has been moved to libio.h and renamed _IO_iconv_t (all actual users used that name). * _G_IO_IO_FILE_VERSION is vestigial; some code cares whether _IO_stdin_used exists, but nothing looks at its value. I've preserved the value as a hardwired constant in csu/init.c. This means csu/init.c no longer needs to include anything. * Many of the headers included by _G_config.h were already being included directly by either either libio.h or stdio.h; the remaining ones were moved to libio.h. * _G_HAVE_MREMAP is still relevant, because mremap genuinely is a Linux extension; it's not in POSIX and as far as I can tell it's not available on the Hurd either. I also preserved _G_HAVE_MMAP, since it's conceivable someone would want to port glibc to a MMU-less, mmap-less environment in the future. Both are now always defined to 1/0 as is the current convention, instead of the older 1/undef convention. These are the only symbols still defined in _G_config.h. * The actual inclusion of _G_config.h moves from libio.h to libioP.h, as this is where a potential override of _G_HAVE_MMAP happens. * The #ifdef logic in libioP.h controlling _IO_JUMPS_OFFSET has been simplified. After this patch, the only surviving _G_ symbols are the struct tag names _G_fpos_t and _G_fpos64_t, which are preserved for the sake of C++ mangled names in applications, and _G_HAVE_MMAP and _G_HAVE_MREMAP, which do not seem worth renaming. Installed stripped libraries are unchanged by this patch. * bits/_G_config.h: Move back to sysdeps/generic/_G_config.h. Delete all contents except for definitions of _G_HAVE_MMAP and _G_HAVE_MREMAP. Add commentary explaining those two symbols. * sysdeps/unix/sysv/linux/bits/_G_config.h: Move back to sysdeps/unix/sysv/linux/_G_config.h. Make same content change as above. * libio/libio.h: Don't include bits/_G_config.h here. Include stddef.h with __need_wchar_t defined. Include bits/types/__mbstate_t.h, bits/types/wint_t.h, and gconv.h. Define _IO_iconv_t here, directly. Don't define _IO_HAVE_ST_BLKSIZE. * libio/libioP.h: Include _G_config.h here. Move include of shlib-compat.h up with rest of includes. Simplify conditionals controlling definition of _IO_JUMPS_OFFSET. * csu/init.c: Remove always-true #if around entire file. Don't include stdio.h. Set _IO_stdin_used to hardwired constant 0x20001, and update commentary. * include/stdio.h, sysdeps/ieee754/ldbl-opt/nldbl-compat.h: Replace all uses of _G_va_list with __gnuc_va_list. * libio/filedoalloc.c: Use #if defined _STATBUF_ST_BLKSIZE instead of #if _IO_HAVE_ST_BLKSIZE. * libio/fileops.c: Test _G_HAVE_MREMAP with #if, not #ifdef. * libio/iofdopen.c, libio/iofopen.c: Test _G_HAVE_MMAP with #if, not #ifdef.
422 lines
13 KiB
C
422 lines
13 KiB
C
/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Written by Per Bothner <bothner@cygnus.com>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>.
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As a special exception, if you link the code in this file with
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files compiled with a GNU compiler to produce an executable,
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that does not cause the resulting executable to be covered by
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the GNU Lesser General Public License. This exception does not
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however invalidate any other reasons why the executable file
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might be covered by the GNU Lesser General Public License.
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This exception applies to code released by its copyright holders
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in files containing the exception. */
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#ifndef _LIBIO_H
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#define _LIBIO_H 1
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#ifndef _LIBC
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# error "libio.h should only be included when building glibc itself"
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#endif
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#ifdef _ISOMAC
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# error "libio.h should not be included under _ISOMAC"
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#endif
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#include <stdio.h>
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#if defined _IO_MTSAFE_IO && !defined _IO_lock_t_defined
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# error "Someone forgot to include stdio-lock.h"
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#endif
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#define __need_wchar_t
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#include <stddef.h>
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#include <bits/types/__mbstate_t.h>
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#include <bits/types/wint_t.h>
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#include <gconv.h>
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typedef union
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{
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struct __gconv_info __cd;
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struct
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{
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struct __gconv_info __cd;
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struct __gconv_step_data __data;
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} __combined;
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} _IO_iconv_t;
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/* Map the names used in libio to the names used in libc generally. */
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#define _IO_fpos_t __fpos_t
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#define _IO_fpos64_t __fpos64_t
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#define _IO_size_t size_t
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#define _IO_ssize_t __ssize_t
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#define _IO_off_t __off_t
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#define _IO_off64_t __off64_t
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#define _IO_pid_t __pid_t
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#define _IO_uid_t __uid_t
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#define _IO_BUFSIZ BUFSIZ
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#define _IO_wint_t wint_t
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#define _IO_va_list __gnuc_va_list
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#include <shlib-compat.h>
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__BEGIN_DECLS
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/* compatibility defines */
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#define _STDIO_USES_IOSTREAM
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#define _IO_UNIFIED_JUMPTABLES 1
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#define __HAVE_COLUMN
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#define _IO_file_flags _flags
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/* open modes */
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#define _IOS_INPUT 1
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#define _IOS_OUTPUT 2
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#define _IOS_ATEND 4
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#define _IOS_APPEND 8
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#define _IOS_TRUNC 16
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#define _IOS_NOCREATE 32
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#define _IOS_NOREPLACE 64
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#define _IOS_BIN 128
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/* Magic numbers and bits for the _flags field.
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The magic numbers use the high-order bits of _flags;
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the remaining bits are available for variable flags.
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Note: The magic numbers must all be negative if stdio
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emulation is desired. */
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#define _IO_MAGIC 0xFBAD0000 /* Magic number */
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#define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
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#define _IO_MAGIC_MASK 0xFFFF0000
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#define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
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#define _IO_UNBUFFERED 2
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#define _IO_NO_READS 4 /* Reading not allowed */
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#define _IO_NO_WRITES 8 /* Writing not allowd */
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#define _IO_EOF_SEEN 0x10
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#define _IO_ERR_SEEN 0x20
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#define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
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#define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
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#define _IO_IN_BACKUP 0x100
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#define _IO_LINE_BUF 0x200
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#define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
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#define _IO_CURRENTLY_PUTTING 0x800
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#define _IO_IS_APPENDING 0x1000
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#define _IO_IS_FILEBUF 0x2000
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#define _IO_BAD_SEEN 0x4000
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#define _IO_USER_LOCK 0x8000
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#define _IO_FLAGS2_MMAP 1
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#define _IO_FLAGS2_NOTCANCEL 2
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#ifdef _LIBC
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# define _IO_FLAGS2_FORTIFY 4
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#endif
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#define _IO_FLAGS2_USER_WBUF 8
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#ifdef _LIBC
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# define _IO_FLAGS2_SCANF_STD 16
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# define _IO_FLAGS2_NOCLOSE 32
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# define _IO_FLAGS2_CLOEXEC 64
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# define _IO_FLAGS2_NEED_LOCK 128
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#endif
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/* These are "formatting flags" matching the iostream fmtflags enum values. */
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#define _IO_SKIPWS 01
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#define _IO_LEFT 02
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#define _IO_RIGHT 04
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#define _IO_INTERNAL 010
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#define _IO_DEC 020
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#define _IO_OCT 040
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#define _IO_HEX 0100
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#define _IO_SHOWBASE 0200
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#define _IO_SHOWPOINT 0400
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#define _IO_UPPERCASE 01000
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#define _IO_SHOWPOS 02000
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#define _IO_SCIENTIFIC 04000
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#define _IO_FIXED 010000
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#define _IO_UNITBUF 020000
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#define _IO_STDIO 040000
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#define _IO_DONT_CLOSE 0100000
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#define _IO_BOOLALPHA 0200000
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struct _IO_jump_t;
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/* A streammarker remembers a position in a buffer. */
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struct _IO_marker {
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struct _IO_marker *_next;
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struct _IO_FILE *_sbuf;
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/* If _pos >= 0
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it points to _buf->Gbase()+_pos. FIXME comment */
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/* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
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int _pos;
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};
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/* This is the structure from the libstdc++ codecvt class. */
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enum __codecvt_result
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{
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__codecvt_ok,
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__codecvt_partial,
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__codecvt_error,
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__codecvt_noconv
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};
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/* The order of the elements in the following struct must match the order
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of the virtual functions in the libstdc++ codecvt class. */
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struct _IO_codecvt
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{
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void (*__codecvt_destr) (struct _IO_codecvt *);
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enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
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__mbstate_t *,
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const wchar_t *,
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const wchar_t *,
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const wchar_t **, char *,
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char *, char **);
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enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
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__mbstate_t *, char *,
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char *, char **);
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enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
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__mbstate_t *,
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const char *, const char *,
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const char **, wchar_t *,
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wchar_t *, wchar_t **);
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int (*__codecvt_do_encoding) (struct _IO_codecvt *);
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int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
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int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
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const char *, const char *, _IO_size_t);
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int (*__codecvt_do_max_length) (struct _IO_codecvt *);
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_IO_iconv_t __cd_in;
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_IO_iconv_t __cd_out;
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};
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/* Extra data for wide character streams. */
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struct _IO_wide_data
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{
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wchar_t *_IO_read_ptr; /* Current read pointer */
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wchar_t *_IO_read_end; /* End of get area. */
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wchar_t *_IO_read_base; /* Start of putback+get area. */
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wchar_t *_IO_write_base; /* Start of put area. */
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wchar_t *_IO_write_ptr; /* Current put pointer. */
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wchar_t *_IO_write_end; /* End of put area. */
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wchar_t *_IO_buf_base; /* Start of reserve area. */
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wchar_t *_IO_buf_end; /* End of reserve area. */
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/* The following fields are used to support backing up and undo. */
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wchar_t *_IO_save_base; /* Pointer to start of non-current get area. */
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wchar_t *_IO_backup_base; /* Pointer to first valid character of
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backup area */
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wchar_t *_IO_save_end; /* Pointer to end of non-current get area. */
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__mbstate_t _IO_state;
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__mbstate_t _IO_last_state;
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struct _IO_codecvt _codecvt;
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wchar_t _shortbuf[1];
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const struct _IO_jump_t *_wide_vtable;
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};
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#ifndef __cplusplus
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typedef struct _IO_FILE _IO_FILE;
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#endif
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struct _IO_FILE_plus;
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extern struct _IO_FILE_plus _IO_2_1_stdin_;
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extern struct _IO_FILE_plus _IO_2_1_stdout_;
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extern struct _IO_FILE_plus _IO_2_1_stderr_;
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#ifndef _LIBC
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#define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
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#define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
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#define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
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#else
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extern _IO_FILE *_IO_stdin attribute_hidden;
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extern _IO_FILE *_IO_stdout attribute_hidden;
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extern _IO_FILE *_IO_stderr attribute_hidden;
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#endif
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/* Compatibility names for cookie I/O functions. */
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#ifdef __USE_GNU
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typedef cookie_read_function_t __io_read_fn;
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typedef cookie_write_function_t __io_write_fn;
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typedef cookie_seek_function_t __io_seek_fn;
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typedef cookie_close_function_t __io_close_fn;
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typedef cookie_io_functions_t _IO_cookie_io_functions_t;
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struct _IO_cookie_file;
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/* Initialize one of those. */
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extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
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void *__cookie, _IO_cookie_io_functions_t __fns);
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#endif
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extern int __underflow (_IO_FILE *);
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extern _IO_wint_t __wunderflow (_IO_FILE *);
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extern _IO_wint_t __wuflow (_IO_FILE *);
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extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
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#if __GNUC__ >= 3
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# define _IO_BE(expr, res) __builtin_expect ((expr), res)
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#else
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# define _IO_BE(expr, res) (expr)
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#endif
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#define _IO_getc_unlocked(_fp) __getc_unlocked_body (_fp)
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#define _IO_peekc_unlocked(_fp) \
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(_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
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&& __underflow (_fp) == EOF ? EOF \
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: *(unsigned char *) (_fp)->_IO_read_ptr)
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#define _IO_putc_unlocked(_ch, _fp) __putc_unlocked_body (_ch, _fp)
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# define _IO_getwc_unlocked(_fp) \
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(_IO_BE ((_fp)->_wide_data == NULL \
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|| ((_fp)->_wide_data->_IO_read_ptr \
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>= (_fp)->_wide_data->_IO_read_end), 0) \
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? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
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# define _IO_putwc_unlocked(_wch, _fp) \
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(_IO_BE ((_fp)->_wide_data == NULL \
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|| ((_fp)->_wide_data->_IO_write_ptr \
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>= (_fp)->_wide_data->_IO_write_end), 0) \
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? __woverflow (_fp, _wch) \
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: (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
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#define _IO_feof_unlocked(_fp) __feof_unlocked_body (_fp)
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#define _IO_ferror_unlocked(_fp) __ferror_unlocked_body (_fp)
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extern int _IO_getc (_IO_FILE *__fp);
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extern int _IO_putc (int __c, _IO_FILE *__fp);
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extern int _IO_feof (_IO_FILE *__fp) __THROW;
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extern int _IO_ferror (_IO_FILE *__fp) __THROW;
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extern int _IO_peekc_locked (_IO_FILE *__fp);
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/* This one is for Emacs. */
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#define _IO_PENDING_OUTPUT_COUNT(_fp) \
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((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
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extern void _IO_flockfile (_IO_FILE *) __THROW;
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extern void _IO_funlockfile (_IO_FILE *) __THROW;
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extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
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#define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
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#define _IO_flockfile(_fp) /**/
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#define _IO_funlockfile(_fp) /**/
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#define _IO_ftrylockfile(_fp) /**/
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#ifndef _IO_cleanup_region_start
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#define _IO_cleanup_region_start(_fct, _fp) /**/
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#endif
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#ifndef _IO_cleanup_region_end
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#define _IO_cleanup_region_end(_Doit) /**/
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#endif
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#define _IO_need_lock(_fp) \
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(((_fp)->_flags2 & _IO_FLAGS2_NEED_LOCK) != 0)
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extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
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_IO_va_list, int *__restrict);
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extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
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_IO_va_list);
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extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
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extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
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extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
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extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
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extern void _IO_free_backup_area (_IO_FILE *) __THROW;
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extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
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extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
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extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
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/* While compiling glibc we have to handle compatibility with very old
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versions. */
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
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# define _IO_fwide_maybe_incompatible \
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(__builtin_expect (&_IO_stdin_used == NULL, 0))
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extern const int _IO_stdin_used;
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weak_extern (_IO_stdin_used);
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#else
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# define _IO_fwide_maybe_incompatible (0)
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#endif
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/* A special optimized version of the function above. It optimizes the
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case of initializing an unoriented byte stream. */
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#define _IO_fwide(__fp, __mode) \
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({ int __result = (__mode); \
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if (__result < 0 && ! _IO_fwide_maybe_incompatible) \
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{ \
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if ((__fp)->_mode == 0) \
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/* We know that all we have to do is to set the flag. */ \
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(__fp)->_mode = -1; \
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__result = (__fp)->_mode; \
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} \
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else if (__builtin_constant_p (__mode) && (__mode) == 0) \
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__result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode; \
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else \
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__result = _IO_fwide (__fp, __result); \
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__result; })
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extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
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_IO_va_list, int *__restrict);
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extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
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_IO_va_list);
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extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
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extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
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#ifdef __LDBL_COMPAT
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__LDBL_REDIR_DECL (_IO_vfscanf)
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__LDBL_REDIR_DECL (_IO_vfprintf)
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#endif
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libc_hidden_proto (__overflow)
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libc_hidden_proto (__underflow)
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libc_hidden_proto (__uflow)
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libc_hidden_proto (__woverflow)
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libc_hidden_proto (__wunderflow)
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libc_hidden_proto (__wuflow)
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libc_hidden_proto (_IO_free_backup_area)
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libc_hidden_proto (_IO_free_wbackup_area)
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libc_hidden_proto (_IO_padn)
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libc_hidden_proto (_IO_putc)
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libc_hidden_proto (_IO_sgetn)
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libc_hidden_proto (_IO_vfprintf)
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libc_hidden_proto (_IO_vfscanf)
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#ifdef _IO_MTSAFE_IO
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# undef _IO_peekc
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# undef _IO_flockfile
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# undef _IO_funlockfile
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# undef _IO_ftrylockfile
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# define _IO_peekc(_fp) _IO_peekc_locked (_fp)
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# if _IO_lock_inexpensive
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# define _IO_flockfile(_fp) \
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if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_lock (*(_fp)->_lock)
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# define _IO_funlockfile(_fp) \
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if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_unlock (*(_fp)->_lock)
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# else
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# define _IO_flockfile(_fp) \
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if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
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# define _IO_funlockfile(_fp) \
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if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
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# endif
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#endif /* _IO_MTSAFE_IO */
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__END_DECLS
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#endif /* _LIBIO_H */
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