mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 22:19:55 +08:00
498 lines
20 KiB
C
498 lines
20 KiB
C
/*
|
|
Copyright (C) 1993 Free Software Foundation
|
|
|
|
This file is part of the GNU IO Library. This library 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 2, or (at your option)
|
|
any later version.
|
|
|
|
This library 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 library; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
As a special exception, if you link this library with files
|
|
compiled with a GNU compiler to produce an executable, this does not cause
|
|
the resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why
|
|
the executable file might be covered by the GNU General Public License. */
|
|
|
|
#include <errno.h>
|
|
#ifndef errno
|
|
extern int errno;
|
|
#endif
|
|
|
|
#include "iolibio.h"
|
|
|
|
#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(__cplusplus)
|
|
/* All known AIX compilers implement these things (but don't always
|
|
define __STDC__). The RISC/OS MIPS compiler defines these things
|
|
in SVR4 mode, but does not define __STDC__. */
|
|
|
|
#define AND ,
|
|
#define DEFUN(name, arglist, args) name(args)
|
|
#define DEFUN_VOID(name) name(void)
|
|
|
|
#else /* Not ANSI C. */
|
|
|
|
#define AND ;
|
|
#ifndef const /* some systems define it in header files for non-ansi mode */
|
|
#define const
|
|
#endif
|
|
#define DEFUN(name, arglist, args) name arglist args;
|
|
#define DEFUN_VOID(name) name()
|
|
#endif /* ANSI C. */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define _IO_seek_set 0
|
|
#define _IO_seek_cur 1
|
|
#define _IO_seek_end 2
|
|
|
|
/* THE JUMPTABLE FUNCTIONS.
|
|
|
|
* The _IO_FILE type is used to implement the FILE type in GNU libc,
|
|
* as well as the streambuf class in GNU iostreams for C++.
|
|
* These are all the same, just used differently.
|
|
* An _IO_FILE (or FILE) object is allows followed by a pointer to
|
|
* a jump table (of pointers to functions). The pointer is accessed
|
|
* with the _IO_JUMPS macro. The jump table has a eccentric format,
|
|
* so as to be compatible with the layout of a C++ virtual function table.
|
|
* (as implemented by g++). When a pointer to a steambuf object is
|
|
* coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
|
|
* happens to point to the virtual function table of the streambuf.
|
|
* Thus the _IO_JUMPS function table used for C stdio/libio does
|
|
* double duty as the virtual functiuon table for C++ streambuf.
|
|
*
|
|
* The entries in the _IO_JUMPS function table (and hence also the
|
|
* virtual functions of a streambuf) are described below.
|
|
* The first parameter of each function entry is the _IO_FILE/streambuf
|
|
* object being acted on (i.e. the 'this' parameter).
|
|
*/
|
|
|
|
#define _IO_JUMPS(THIS) ((struct _IO_FILE_plus*)(THIS))->vtable
|
|
#ifdef _G_USING_THUNKS
|
|
#define JUMP_FIELD(TYPE, NAME) TYPE NAME
|
|
#define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC(THIS)
|
|
#define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC(THIS, X1)
|
|
#define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC(THIS, X1, X2)
|
|
#define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC(THIS, X1,X2, X3)
|
|
#define JUMP_INIT(NAME, VALUE) VALUE
|
|
#define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT(dummy2, 0)
|
|
#else
|
|
/* These macros will change when we re-implement vtables to use "thunks"! */
|
|
#define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
|
|
#define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC.pfn(THIS)
|
|
#define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1)
|
|
#define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1, X2)
|
|
#define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1,X2, X3)
|
|
#define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
|
|
#define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
|
|
#endif
|
|
|
|
/* The 'finish' function does any final cleaning up of an _IO_FILE object.
|
|
It does not delete (free) it, but does everything else to finalize it/
|
|
It matches the streambuf::~streambuf virtual destructor. */
|
|
typedef void (*_IO_finish_t) __P((_IO_FILE*)); /* finalize */
|
|
#define _IO_FINISH(FP) JUMP0(__finish, FP)
|
|
|
|
/* The 'overflow' hook flushes the buffer.
|
|
The second argument is a character, or EOF.
|
|
It matches the streambuf::overflow virtual function. */
|
|
typedef int (*_IO_overflow_t) __P((_IO_FILE*, int));
|
|
#define _IO_OVERFLOW(FP, CH) JUMP1(__overflow, FP, CH)
|
|
|
|
/* The 'underflow' hook tries to fills the get buffer.
|
|
It returns the next character (as an unsigned char) or EOF. The next
|
|
character remains in the get buffer, and the get postion is not changed.
|
|
It matches the streambuf::underflow virtual function. */
|
|
typedef int (*_IO_underflow_t) __P((_IO_FILE*));
|
|
#define _IO_UNDERFLOW(FP) JUMP0(__underflow, FP)
|
|
|
|
/* The 'uflow' hook returns the next character in the input stream
|
|
(cast to unsigned char), and increments the read position;
|
|
EOF is returned on failure.
|
|
It matches the streambuf::uflow virtual function, which is not in the
|
|
cfront implementation, but was added to C++ by the ANSI/ISO committee. */
|
|
#define _IO_UFLOW(FP) JUMP0(__uflow, FP)
|
|
|
|
/* The 'pbackfail' hook handles backing up.
|
|
It matches the streambuf::pbackfail virtual function. */
|
|
typedef int (*_IO_pbackfail_t) __P((_IO_FILE*, int));
|
|
#define _IO_PBACKFAIL(FP, CH) JUMP1(__pbackfail, FP, CH)
|
|
|
|
/* The 'xsputn' hook writes upto N characters from buffer DATA.
|
|
Returns the number of character actually written.
|
|
It matches the streambuf::xsputn virtual function. */
|
|
typedef _IO_size_t (*_IO_xsputn_t)
|
|
__P((_IO_FILE *FP, const void *DATA, _IO_size_t N));
|
|
#define _IO_XSPUTN(FP, DATA, N) JUMP2(__xsputn, FP, DATA, N)
|
|
|
|
/* The 'xsgetn' hook reads upto N characters into buffer DATA.
|
|
Returns the number of character actually read.
|
|
It matches the streambuf::xsgetn virtual function. */
|
|
typedef _IO_size_t (*_IO_xsgetn_t) __P((_IO_FILE*FP, void*DATA, _IO_size_t N));
|
|
#define _IO_XSGETN(FP, DATA, N) JUMP2(__xsgetn, FP, DATA, N)
|
|
|
|
/* The 'seekoff' hook moves the stream position to a new position
|
|
relative to the start of the file (if DIR==0), the current position
|
|
(MODE==1), or the end of the file (MODE==2).
|
|
It matches the streambuf::seekoff virtual function.
|
|
It is also used for the ANSI fseek function. */
|
|
typedef _IO_fpos_t (*_IO_seekoff_t)
|
|
__P((_IO_FILE* FP, _IO_off_t OFF, int DIR, int MODE));
|
|
#define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3(__seekoff, FP, OFF, DIR, MODE)
|
|
|
|
/* The 'seekpos' hook also moves the stream position,
|
|
but to an absolute position given by a fpos_t (seekpos).
|
|
It matches the streambuf::seekpos virtual function.
|
|
It is also used for the ANSI fgetpos and fsetpos functions. */
|
|
/* The _IO_seek_cur and _IO_seek_end options are not allowed. */
|
|
typedef _IO_fpos_t (*_IO_seekpos_t) __P((_IO_FILE*, _IO_fpos_t, int));
|
|
#define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2(__seekpos, FP, POS, FLAGS)
|
|
|
|
/* The 'setbuf' hook gives a buffer to the file.
|
|
It matches the streambuf::setbuf virtual function. */
|
|
typedef _IO_FILE* (*_IO_setbuf_t) __P((_IO_FILE*, char *, _IO_ssize_t));
|
|
#define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2(__setbuf, FP, BUFFER, LENGTH)
|
|
|
|
/* The 'sync' hook attempts to synchronize the internal data structures
|
|
of the file with the external state.
|
|
It matches the streambuf::sync virtual function. */
|
|
typedef int (*_IO_sync_t) __P((_IO_FILE*));
|
|
#define _IO_SYNC(FP) JUMP0(__sync, FP)
|
|
|
|
/* The 'doallocate' hook is used to tell the file to allocate a buffer.
|
|
It matches the streambuf::doallocate virtual function, which is not
|
|
in the ANSI/ISO C++ standard, but is part traditional implementations. */
|
|
typedef int (*_IO_doallocate_t) __P((_IO_FILE*));
|
|
#define _IO_DOALLOCATE(FP) JUMP0(__doallocate, FP)
|
|
|
|
/* The following four hooks (sysread, syswrite, sysclose, sysseek, and
|
|
sysstat) are low-level hooks specific to this implementation.
|
|
There is no correspondance in the ANSI/ISO C++ standard library.
|
|
The hooks basically correspond to the Unix system functions
|
|
(read, write, close, lseek, and stat) except that a _IO_FILE*
|
|
parameter is used instead of a integer file descriptor; the default
|
|
implementation used for normal files just calls those functions.
|
|
The advantage of overriding these functions instead of the higher-level
|
|
ones (underflow, overflow etc) is that you can leave all the buffering
|
|
higher-level functions. */
|
|
|
|
/* The 'sysread' hook is used to read data from the external file into
|
|
an existing buffer. It generalizes the Unix read(2) function.
|
|
It matches the streambuf::sys_read virtual function, which is
|
|
specific to this implementaion. */
|
|
typedef _IO_ssize_t (*_IO_read_t) __P((_IO_FILE*, void*, _IO_ssize_t));
|
|
#define _IO_SYSREAD(FP, DATA, LEN) JUMP2(__read, FP, DATA, LEN)
|
|
|
|
/* The 'syswrite' hook is used to write data from an existing buffer
|
|
to an external file. It generalizes the Unix write(2) function.
|
|
It matches the streambuf::sys_write virtual function, which is
|
|
specific to this implementaion. */
|
|
typedef _IO_ssize_t (*_IO_write_t) __P((_IO_FILE*,const void*,_IO_ssize_t));
|
|
#define _IO_SYSWRITE(FP, DATA, LEN) JUMP2(__write, FP, DATA, LEN)
|
|
|
|
/* The 'sysseek' hook is used to re-position an external file.
|
|
It generalizes the Unix lseek(2) function.
|
|
It matches the streambuf::sys_seek virtual function, which is
|
|
specific to this implementaion. */
|
|
typedef _IO_fpos_t (*_IO_seek_t) __P((_IO_FILE*, _IO_off_t, int));
|
|
#define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2(__seek, FP, OFFSET, MODE)
|
|
|
|
/* The 'sysclose' hook is used to finalize (close, finish up) an
|
|
external file. It generalizes the Unix close(2) function.
|
|
It matches the streambuf::sys_close virtual function, which is
|
|
specific to this implementation. */
|
|
typedef int (*_IO_close_t) __P((_IO_FILE*)); /* finalize */
|
|
#define _IO_SYSCLOSE(FP) JUMP0(__close, FP)
|
|
|
|
/* The 'sysstat' hook is used to get information about an external file
|
|
into a struct stat buffer. It generalizes the Unix fstat(2) call.
|
|
It matches the streambuf::sys_stat virtual function, which is
|
|
specific to this implementaion. */
|
|
typedef int (*_IO_stat_t) __P((_IO_FILE*, void*));
|
|
#define _IO_SYSSTAT(FP, BUF) JUMP1(__stat, FP, BUF)
|
|
|
|
|
|
#define _IO_CHAR_TYPE char /* unsigned char ? */
|
|
#define _IO_INT_TYPE int
|
|
|
|
struct _IO_jump_t {
|
|
JUMP_FIELD(_G_size_t, __dummy);
|
|
#ifdef _G_USING_THUNKS
|
|
JUMP_FIELD(_G_size_t, __dummy2);
|
|
#endif
|
|
JUMP_FIELD(_IO_finish_t, __finish);
|
|
JUMP_FIELD(_IO_overflow_t, __overflow);
|
|
JUMP_FIELD(_IO_underflow_t, __underflow);
|
|
JUMP_FIELD(_IO_underflow_t, __uflow);
|
|
JUMP_FIELD(_IO_pbackfail_t, __pbackfail);
|
|
/* showmany */
|
|
JUMP_FIELD(_IO_xsputn_t, __xsputn);
|
|
JUMP_FIELD(_IO_xsgetn_t, __xsgetn);
|
|
JUMP_FIELD(_IO_seekoff_t, __seekoff);
|
|
JUMP_FIELD(_IO_seekpos_t, __seekpos);
|
|
JUMP_FIELD(_IO_setbuf_t, __setbuf);
|
|
JUMP_FIELD(_IO_sync_t, __sync);
|
|
JUMP_FIELD(_IO_doallocate_t, __doallocate);
|
|
JUMP_FIELD(_IO_read_t, __read);
|
|
JUMP_FIELD(_IO_write_t, __write);
|
|
JUMP_FIELD(_IO_seek_t, __seek);
|
|
JUMP_FIELD(_IO_close_t, __close);
|
|
JUMP_FIELD(_IO_stat_t, __stat);
|
|
#if 0
|
|
get_column;
|
|
set_column;
|
|
#endif
|
|
};
|
|
|
|
/* We always allocate an extra word following an _IO_FILE.
|
|
This contains a pointer to the function jump table used.
|
|
This is for compatibility with C++ streambuf; the word can
|
|
be used to smash to a pointer to a virtual function table. */
|
|
|
|
struct _IO_FILE_plus {
|
|
_IO_FILE file;
|
|
const struct _IO_jump_t *vtable;
|
|
};
|
|
|
|
/* Generic functions */
|
|
|
|
extern int _IO_switch_to_get_mode __P((_IO_FILE*));
|
|
extern void _IO_init __P((_IO_FILE*, int));
|
|
extern int _IO_sputbackc __P((_IO_FILE*, int));
|
|
extern int _IO_sungetc __P((_IO_FILE*));
|
|
extern void _IO_un_link __P((_IO_FILE*));
|
|
extern void _IO_link_in __P((_IO_FILE *));
|
|
extern void _IO_doallocbuf __P((_IO_FILE*));
|
|
extern void _IO_unsave_markers __P((_IO_FILE*));
|
|
extern void _IO_setb __P((_IO_FILE*, char*, char*, int));
|
|
extern unsigned _IO_adjust_column __P((unsigned, const char *, int));
|
|
#define _IO_sputn(__fp, __s, __n) _IO_XSPUTN(__fp, __s, __n)
|
|
|
|
/* Marker-related function. */
|
|
|
|
extern void _IO_init_marker __P((struct _IO_marker *, _IO_FILE *));
|
|
extern void _IO_remove_marker __P((struct _IO_marker*));
|
|
extern int _IO_marker_difference __P((struct _IO_marker *, struct _IO_marker *));
|
|
extern int _IO_marker_delta __P((struct _IO_marker *));
|
|
extern int _IO_seekmark __P((_IO_FILE *, struct _IO_marker *, int));
|
|
|
|
/* Default jumptable functions. */
|
|
|
|
extern int _IO_default_underflow __P((_IO_FILE*));
|
|
extern int _IO_default_uflow __P((_IO_FILE*));
|
|
extern int _IO_default_doallocate __P((_IO_FILE*));
|
|
extern void _IO_default_finish __P((_IO_FILE *));
|
|
extern int _IO_default_pbackfail __P((_IO_FILE*, int));
|
|
extern _IO_FILE* _IO_default_setbuf __P((_IO_FILE *, char*, _IO_ssize_t));
|
|
extern _IO_size_t _IO_default_xsputn __P((_IO_FILE *, const void*, _IO_size_t));
|
|
extern _IO_size_t _IO_default_xsgetn __P((_IO_FILE *, void*, _IO_size_t));
|
|
extern _IO_fpos_t _IO_default_seekoff __P((_IO_FILE*, _IO_off_t, int, int));
|
|
extern _IO_fpos_t _IO_default_seekpos __P((_IO_FILE*, _IO_fpos_t, int));
|
|
extern _IO_ssize_t _IO_default_write __P((_IO_FILE*,const void*,_IO_ssize_t));
|
|
extern _IO_ssize_t _IO_default_read __P((_IO_FILE*, void*, _IO_ssize_t));
|
|
extern int _IO_default_stat __P((_IO_FILE*, void*));
|
|
extern _IO_fpos_t _IO_default_seek __P((_IO_FILE*, _IO_off_t, int));
|
|
extern int _IO_default_sync __P((_IO_FILE*));
|
|
#define _IO_default_close ((_IO_close_t)_IO_default_sync)
|
|
|
|
extern struct _IO_jump_t _IO_file_jumps;
|
|
extern struct _IO_jump_t _IO_streambuf_jumps;
|
|
extern struct _IO_jump_t _IO_proc_jumps;
|
|
extern struct _IO_jump_t _IO_str_jumps;
|
|
extern int _IO_do_write __P((_IO_FILE*, const char*, _IO_size_t));
|
|
extern int _IO_flush_all __P((void));
|
|
extern void _IO_cleanup __P((void));
|
|
extern void _IO_flush_all_linebuffered __P((void));
|
|
|
|
#define _IO_do_flush(_f) \
|
|
_IO_do_write(_f, (_f)->_IO_write_base, \
|
|
(_f)->_IO_write_ptr-(_f)->_IO_write_base)
|
|
#define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
|
|
#define _IO_mask_flags(fp, f, mask) \
|
|
((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
|
|
#define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\
|
|
(fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
|
|
#define _IO_setp(__fp, __p, __ep) \
|
|
((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep))
|
|
#define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
|
|
#define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
|
|
#define _IO_have_markers(fp) ((fp)->_markers != NULL)
|
|
#define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
|
|
|
|
/* Jumptable functions for files. */
|
|
|
|
extern int _IO_file_doallocate __P((_IO_FILE*));
|
|
extern _IO_FILE* _IO_file_setbuf __P((_IO_FILE *, char*, _IO_ssize_t));
|
|
extern _IO_fpos_t _IO_file_seekoff __P((_IO_FILE*, _IO_off_t, int, int));
|
|
extern _IO_size_t _IO_file_xsputn __P((_IO_FILE*,const void*,_IO_size_t));
|
|
extern int _IO_file_stat __P((_IO_FILE*, void*));
|
|
extern int _IO_file_close __P((_IO_FILE*));
|
|
extern int _IO_file_underflow __P((_IO_FILE *));
|
|
extern int _IO_file_overflow __P((_IO_FILE *, int));
|
|
#define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0)
|
|
extern void _IO_file_init __P((_IO_FILE*));
|
|
extern _IO_FILE* _IO_file_fopen __P((_IO_FILE*, const char*, const char*));
|
|
extern _IO_ssize_t _IO_file_write __P((_IO_FILE*,const void*,_IO_ssize_t));
|
|
extern _IO_ssize_t _IO_file_read __P((_IO_FILE*, void*, _IO_ssize_t));
|
|
extern int _IO_file_sync __P((_IO_FILE*));
|
|
extern int _IO_file_close_it __P((_IO_FILE*));
|
|
extern _IO_fpos_t _IO_file_seek __P((_IO_FILE *, _IO_off_t, int));
|
|
extern void _IO_file_finish __P((_IO_FILE*));
|
|
|
|
/* Other file functions. */
|
|
extern _IO_FILE* _IO_file_attach __P((_IO_FILE *, int));
|
|
|
|
/* Jumptable functions for proc_files. */
|
|
extern _IO_FILE* _IO_proc_open __P((_IO_FILE*, const char*, const char *));
|
|
extern int _IO_proc_close __P((_IO_FILE*));
|
|
|
|
/* Jumptable functions for strfiles. */
|
|
extern int _IO_str_underflow __P((_IO_FILE*));
|
|
extern int _IO_str_overflow __P((_IO_FILE *, int));
|
|
extern int _IO_str_pbackfail __P((_IO_FILE*, int));
|
|
extern _IO_fpos_t _IO_str_seekoff __P((_IO_FILE*,_IO_off_t,int,int));
|
|
|
|
/* Other strfile functions */
|
|
extern void _IO_str_init_static __P((_IO_FILE *, char*, int, char*));
|
|
extern void _IO_str_init_readonly __P((_IO_FILE *, const char*, int));
|
|
extern _IO_ssize_t _IO_str_count __P ((_IO_FILE*));
|
|
|
|
extern _IO_size_t _IO_getline __P((_IO_FILE*,char*,_IO_size_t,int,int));
|
|
extern _IO_ssize_t _IO_getdelim __P((char**, _IO_size_t*, int, _IO_FILE*));
|
|
extern double _IO_strtod __P((const char *, char **));
|
|
extern char * _IO_dtoa __P((double __d, int __mode, int __ndigits,
|
|
int *__decpt, int *__sign, char **__rve));
|
|
extern int _IO_outfloat __P((double __value, _IO_FILE *__sb, int __type,
|
|
int __width, int __precision, int __flags,
|
|
int __sign_mode, int __fill));
|
|
|
|
extern _IO_FILE *_IO_list_all;
|
|
extern void (*_IO_cleanup_registration_needed) __P ((void));
|
|
|
|
#ifndef EOF
|
|
#define EOF (-1)
|
|
#endif
|
|
#ifndef NULL
|
|
#ifdef __GNUG__
|
|
#define NULL (__null)
|
|
#else
|
|
#if !defined(__cplusplus)
|
|
#define NULL ((void*)0)
|
|
#else
|
|
#define NULL (0)
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#define FREE_BUF(_B) free(_B)
|
|
#define ALLOC_BUF(_S) (char*)malloc(_S)
|
|
|
|
#ifndef OS_FSTAT
|
|
#define OS_FSTAT fstat
|
|
#endif
|
|
struct stat;
|
|
extern _IO_ssize_t _IO_read __P((int, void*, _IO_size_t));
|
|
extern _IO_ssize_t _IO_write __P((int, const void*, _IO_size_t));
|
|
extern _IO_off_t _IO_lseek __P((int, _IO_off_t, int));
|
|
extern int _IO_close __P((int));
|
|
extern int _IO_fstat __P((int, struct stat *));
|
|
|
|
/* Operations on _IO_fpos_t.
|
|
Normally, these are trivial, but we provide hooks for configurations
|
|
where an _IO_fpos_t is a struct.
|
|
Note that _IO_off_t must be an integral type. */
|
|
|
|
/* _IO_pos_BAD is an _IO_fpos_t value indicating error, unknown, or EOF. */
|
|
#ifndef _IO_pos_BAD
|
|
#define _IO_pos_BAD ((_IO_fpos_t)(-1))
|
|
#endif
|
|
/* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */
|
|
#ifndef _IO_pos_as_off
|
|
#define _IO_pos_as_off(__pos) ((_IO_off_t)(__pos))
|
|
#endif
|
|
/* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */
|
|
#ifndef _IO_pos_adjust
|
|
#define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta))
|
|
#endif
|
|
/* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */
|
|
#ifndef _IO_pos_0
|
|
#define _IO_pos_0 ((_IO_fpos_t)0)
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/* check following! */
|
|
#define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
|
|
{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}
|
|
|
|
/* VTABLE_LABEL defines NAME as of the CLASS class.
|
|
CNLENGTH is strlen(#CLASS). */
|
|
#ifdef __GNUC__
|
|
#if _G_VTABLE_LABEL_HAS_LENGTH
|
|
#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
|
|
extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
|
|
#else
|
|
#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
|
|
extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
|
|
#endif
|
|
#endif /* __GNUC__ */
|
|
|
|
#if !defined(builtinbuf_vtable) && defined(__cplusplus)
|
|
#ifdef __GNUC__
|
|
VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10)
|
|
#else
|
|
#if _G_VTABLE_LABEL_HAS_LENGTH
|
|
#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
|
|
#else
|
|
#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
|
|
#endif
|
|
#endif
|
|
#endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
|
|
|
|
#if defined(__STDC__) || defined(__cplusplus)
|
|
#define _IO_va_start(args, last) va_start(args, last)
|
|
#else
|
|
#define _IO_va_start(args, last) va_start(args)
|
|
#endif
|
|
|
|
extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
|
|
|
|
#if 1
|
|
#define COERCE_FILE(FILE) /* Nothing */
|
|
#else
|
|
/* This is part of the kludge for binary compatibility with old stdio. */
|
|
#define COERCE_FILE(FILE) \
|
|
(((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
|
|
&& (FILE) = *(FILE**)&((int*)fp)[1])
|
|
#endif
|
|
|
|
#ifdef EINVAL
|
|
#define MAYBE_SET_EINVAL errno = EINVAL
|
|
#else
|
|
#define MAYBE_SET_EINVAL /* nothing */
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
#define CHECK_FILE(FILE,RET) \
|
|
if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
|
|
else { COERCE_FILE(FILE); \
|
|
if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
|
|
{ errno = EINVAL; return RET; }}
|
|
#else
|
|
#define CHECK_FILE(FILE,RET) \
|
|
COERCE_FILE(FILE)
|
|
#endif
|