1 /* Copyright (C) 1993, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU IO Library.
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2, or (at
7 your option) any later version.
9 This library is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this library; see the file COPYING. If not, write to
16 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
19 As a special exception, if you link this library with files
20 compiled with a GNU compiler to produce an executable, this does
21 not cause the resulting executable to be covered by the GNU General
22 Public License. This exception does not however invalidate any
23 other reasons why the executable file might be covered by the GNU
24 General Public License. */
28 # define __set_errno(Val) errno = (Val)
30 #if defined __GLIBC__ && __GLIBC__ >= 2
31 # if __GLIBC_MINOR__ > 0
32 # include <bits/libc-lock.h>
34 # include <libc-lock.h>
37 /*# include <comthread.h>*/
46 #define _IO_seek_set 0
47 #define _IO_seek_cur 1
48 #define _IO_seek_end 2
50 /* THE JUMPTABLE FUNCTIONS.
52 * The _IO_FILE type is used to implement the FILE type in GNU libc,
53 * as well as the streambuf class in GNU iostreams for C++.
54 * These are all the same, just used differently.
55 * An _IO_FILE (or FILE) object is allows followed by a pointer to
56 * a jump table (of pointers to functions). The pointer is accessed
57 * with the _IO_JUMPS macro. The jump table has a eccentric format,
58 * so as to be compatible with the layout of a C++ virtual function table.
59 * (as implemented by g++). When a pointer to a streambuf object is
60 * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
61 * happens to point to the virtual function table of the streambuf.
62 * Thus the _IO_JUMPS function table used for C stdio/libio does
63 * double duty as the virtual function table for C++ streambuf.
65 * The entries in the _IO_JUMPS function table (and hence also the
66 * virtual functions of a streambuf) are described below.
67 * The first parameter of each function entry is the _IO_FILE/streambuf
68 * object being acted on (i.e. the 'this' parameter).
71 #define _IO_JUMPS(THIS) ((struct _IO_FILE_plus *) (THIS))->vtable
72 #ifdef _G_USING_THUNKS
73 # define JUMP_FIELD(TYPE, NAME) TYPE NAME
74 # define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC (THIS)
75 # define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC (THIS, X1)
76 # define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC (THIS, X1, X2)
77 # define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC (THIS, X1,X2, X3)
78 # define JUMP_INIT(NAME, VALUE) VALUE
79 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
81 /* These macros will change when we re-implement vtables to use "thunks"! */
82 # define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
83 # define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC.pfn (THIS)
84 # define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1)
85 # define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1, X2)
86 # define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1,X2,X3)
87 # define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
88 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
91 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
92 It does not delete (free) it, but does everything else to finalize it/
93 It matches the streambuf::~streambuf virtual destructor. */
94 typedef void (*_IO_finish_t
) __PMT ((_IO_FILE
*, int)); /* finalize */
95 #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
97 /* The 'overflow' hook flushes the buffer.
98 The second argument is a character, or EOF.
99 It matches the streambuf::overflow virtual function. */
100 typedef int (*_IO_overflow_t
) __PMT ((_IO_FILE
*, int));
101 #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
103 /* The 'underflow' hook tries to fills the get buffer.
104 It returns the next character (as an unsigned char) or EOF. The next
105 character remains in the get buffer, and the get position is not changed.
106 It matches the streambuf::underflow virtual function. */
107 typedef int (*_IO_underflow_t
) __PMT ((_IO_FILE
*));
108 #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
110 /* The 'uflow' hook returns the next character in the input stream
111 (cast to unsigned char), and increments the read position;
112 EOF is returned on failure.
113 It matches the streambuf::uflow virtual function, which is not in the
114 cfront implementation, but was added to C++ by the ANSI/ISO committee. */
115 #define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
117 /* The 'pbackfail' hook handles backing up.
118 It matches the streambuf::pbackfail virtual function. */
119 typedef int (*_IO_pbackfail_t
) __PMT ((_IO_FILE
*, int));
120 #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
122 /* The 'xsputn' hook writes upto N characters from buffer DATA.
123 Returns the number of character actually written.
124 It matches the streambuf::xsputn virtual function. */
125 typedef _IO_size_t (*_IO_xsputn_t
) __PMT ((_IO_FILE
*FP
, const void *DATA
,
127 #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
129 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
130 Returns the number of character actually read.
131 It matches the streambuf::xsgetn virtual function. */
132 typedef _IO_size_t (*_IO_xsgetn_t
) __PMT ((_IO_FILE
*FP
, void *DATA
,
134 #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
136 /* The 'seekoff' hook moves the stream position to a new position
137 relative to the start of the file (if DIR==0), the current position
138 (MODE==1), or the end of the file (MODE==2).
139 It matches the streambuf::seekoff virtual function.
140 It is also used for the ANSI fseek function. */
141 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
142 typedef _IO_fpos64_t (*_IO_seekoff_t
) __PMT ((_IO_FILE
*FP
, _IO_off64_t OFF
,
145 typedef _IO_fpos_t (*_IO_seekoff_t
) __PMT ((_IO_FILE
*FP
, _IO_off_t OFF
,
148 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
150 /* The 'seekpos' hook also moves the stream position,
151 but to an absolute position given by a fpos_t (seekpos).
152 It matches the streambuf::seekpos virtual function.
153 It is also used for the ANSI fgetpos and fsetpos functions. */
154 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
155 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
156 typedef _IO_fpos64_t (*_IO_seekpos_t
) __PMT ((_IO_FILE
*, _IO_fpos64_t
, int));
158 typedef _IO_fpos_t (*_IO_seekpos_t
) __PMT ((_IO_FILE
*, _IO_fpos_t
, int));
160 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
162 /* The 'setbuf' hook gives a buffer to the file.
163 It matches the streambuf::setbuf virtual function. */
164 typedef _IO_FILE
* (*_IO_setbuf_t
) __PMT ((_IO_FILE
*, char *, _IO_ssize_t
));
165 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
167 /* The 'sync' hook attempts to synchronize the internal data structures
168 of the file with the external state.
169 It matches the streambuf::sync virtual function. */
170 typedef int (*_IO_sync_t
) __PMT ((_IO_FILE
*));
171 #define _IO_SYNC(FP) JUMP0 (__sync, FP)
173 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
174 It matches the streambuf::doallocate virtual function, which is not
175 in the ANSI/ISO C++ standard, but is part traditional implementations. */
176 typedef int (*_IO_doallocate_t
) __PMT ((_IO_FILE
*));
177 #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
179 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
180 sysstat) are low-level hooks specific to this implementation.
181 There is no correspondence in the ANSI/ISO C++ standard library.
182 The hooks basically correspond to the Unix system functions
183 (read, write, close, lseek, and stat) except that a _IO_FILE*
184 parameter is used instead of a integer file descriptor; the default
185 implementation used for normal files just calls those functions.
186 The advantage of overriding these functions instead of the higher-level
187 ones (underflow, overflow etc) is that you can leave all the buffering
188 higher-level functions. */
190 /* The 'sysread' hook is used to read data from the external file into
191 an existing buffer. It generalizes the Unix read(2) function.
192 It matches the streambuf::sys_read virtual function, which is
193 specific to this implementation. */
194 typedef _IO_ssize_t (*_IO_read_t
) __PMT ((_IO_FILE
*, void *, _IO_ssize_t
));
195 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
197 /* The 'syswrite' hook is used to write data from an existing buffer
198 to an external file. It generalizes the Unix write(2) function.
199 It matches the streambuf::sys_write virtual function, which is
200 specific to this implementation. */
201 typedef _IO_ssize_t (*_IO_write_t
) __PMT ((_IO_FILE
*,const void *,_IO_ssize_t
));
202 #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN)
204 /* The 'sysseek' hook is used to re-position an external file.
205 It generalizes the Unix lseek(2) function.
206 It matches the streambuf::sys_seek virtual function, which is
207 specific to this implementation. */
208 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
209 typedef _IO_fpos64_t (*_IO_seek_t
) __PMT ((_IO_FILE
*, _IO_off64_t
, int));
211 typedef _IO_fpos_t (*_IO_seek_t
) __PMT ((_IO_FILE
*, _IO_off_t
, int));
213 #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE)
215 /* The 'sysclose' hook is used to finalize (close, finish up) an
216 external file. It generalizes the Unix close(2) function.
217 It matches the streambuf::sys_close virtual function, which is
218 specific to this implementation. */
219 typedef int (*_IO_close_t
) __PMT ((_IO_FILE
*)); /* finalize */
220 #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP)
222 /* The 'sysstat' hook is used to get information about an external file
223 into a struct stat buffer. It generalizes the Unix fstat(2) call.
224 It matches the streambuf::sys_stat virtual function, which is
225 specific to this implementation. */
226 typedef int (*_IO_stat_t
) __PMT ((_IO_FILE
*, void *));
227 #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF)
229 #if _G_IO_IO_FILE_VERSION == 0x20001
230 /* The 'showmany' hook can be used to get an image how much input is
231 available. In many cases the answer will be 0 which means unknown
232 but some cases one can provide real information. */
233 typedef int (*_IO_showmanyc_t
) __PMT ((_IO_FILE
*));
234 #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP)
236 /* The 'imbue' hook is used to get information about the currently
237 installed locales. */
238 typedef void (*_IO_imbue_t
) __PMT ((_IO_FILE
*, void *));
239 #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE)
243 #define _IO_CHAR_TYPE char /* unsigned char ? */
244 #define _IO_INT_TYPE int
248 JUMP_FIELD(_G_size_t
, __dummy
);
249 #ifdef _G_USING_THUNKS
250 JUMP_FIELD(_G_size_t
, __dummy2
);
252 JUMP_FIELD(_IO_finish_t
, __finish
);
253 JUMP_FIELD(_IO_overflow_t
, __overflow
);
254 JUMP_FIELD(_IO_underflow_t
, __underflow
);
255 JUMP_FIELD(_IO_underflow_t
, __uflow
);
256 JUMP_FIELD(_IO_pbackfail_t
, __pbackfail
);
258 JUMP_FIELD(_IO_xsputn_t
, __xsputn
);
259 JUMP_FIELD(_IO_xsgetn_t
, __xsgetn
);
260 JUMP_FIELD(_IO_seekoff_t
, __seekoff
);
261 JUMP_FIELD(_IO_seekpos_t
, __seekpos
);
262 JUMP_FIELD(_IO_setbuf_t
, __setbuf
);
263 JUMP_FIELD(_IO_sync_t
, __sync
);
264 JUMP_FIELD(_IO_doallocate_t
, __doallocate
);
265 JUMP_FIELD(_IO_read_t
, __read
);
266 JUMP_FIELD(_IO_write_t
, __write
);
267 JUMP_FIELD(_IO_seek_t
, __seek
);
268 JUMP_FIELD(_IO_close_t
, __close
);
269 JUMP_FIELD(_IO_stat_t
, __stat
);
270 #if _G_IO_IO_FILE_VERSION == 0x20001
271 JUMP_FIELD(_IO_showmanyc_t
, __showmanyc
);
272 JUMP_FIELD(_IO_imbue_t
, __imbue
);
280 /* We always allocate an extra word following an _IO_FILE.
281 This contains a pointer to the function jump table used.
282 This is for compatibility with C++ streambuf; the word can
283 be used to smash to a pointer to a virtual function table. */
288 const struct _IO_jump_t
*vtable
;
291 /* Generic functions */
293 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
294 extern _IO_fpos64_t _IO_seekoff
__P ((_IO_FILE
*, _IO_off64_t
, int, int));
295 extern _IO_fpos64_t _IO_seekpos
__P ((_IO_FILE
*, _IO_fpos64_t
, int));
297 extern _IO_fpos_t _IO_seekoff
__P ((_IO_FILE
*, _IO_off_t
, int, int));
298 extern _IO_fpos_t _IO_seekpos
__P ((_IO_FILE
*, _IO_fpos_t
, int));
301 extern void _IO_switch_to_main_get_area
__P ((_IO_FILE
*));
302 extern void _IO_switch_to_backup_area
__P ((_IO_FILE
*));
303 extern int _IO_switch_to_get_mode
__P ((_IO_FILE
*));
304 extern void _IO_init
__P ((_IO_FILE
*, int));
305 extern int _IO_sputbackc
__P ((_IO_FILE
*, int));
306 extern int _IO_sungetc
__P ((_IO_FILE
*));
307 extern void _IO_un_link
__P ((_IO_FILE
*));
308 extern void _IO_link_in
__P ((_IO_FILE
*));
309 extern void _IO_doallocbuf
__P ((_IO_FILE
*));
310 extern void _IO_unsave_markers
__P ((_IO_FILE
*));
311 extern void _IO_setb
__P ((_IO_FILE
*, char *, char *, int));
312 extern unsigned _IO_adjust_column
__P ((unsigned, const char *, int));
313 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
315 /* Marker-related function. */
317 extern void _IO_init_marker
__P ((struct _IO_marker
*, _IO_FILE
*));
318 extern void _IO_remove_marker
__P ((struct _IO_marker
*));
319 extern int _IO_marker_difference
__P ((struct _IO_marker
*,
320 struct _IO_marker
*));
321 extern int _IO_marker_delta
__P ((struct _IO_marker
*));
322 extern int _IO_seekmark
__P ((_IO_FILE
*, struct _IO_marker
*, int));
324 /* Default jumptable functions. */
326 extern int _IO_default_underflow
__P ((_IO_FILE
*));
327 extern int _IO_default_uflow
__P ((_IO_FILE
*));
328 extern int _IO_default_doallocate
__P ((_IO_FILE
*));
329 extern void _IO_default_finish
__P ((_IO_FILE
*, int));
330 extern int _IO_default_pbackfail
__P ((_IO_FILE
*, int));
331 extern _IO_FILE
* _IO_default_setbuf
__P ((_IO_FILE
*, char *, _IO_ssize_t
));
332 extern _IO_size_t _IO_default_xsputn
__P ((_IO_FILE
*, const void *,
334 extern _IO_size_t _IO_default_xsgetn
__P ((_IO_FILE
*, void *, _IO_size_t
));
335 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
336 extern _IO_fpos64_t _IO_default_seekoff
__P ((_IO_FILE
*,
337 _IO_off64_t
, int, int));
338 extern _IO_fpos64_t _IO_default_seekpos
__P ((_IO_FILE
*,
341 extern _IO_fpos_t _IO_default_seekoff
__P ((_IO_FILE
*, _IO_off_t
, int, int));
342 extern _IO_fpos_t _IO_default_seekpos
__P ((_IO_FILE
*, _IO_fpos_t
, int));
344 extern _IO_ssize_t _IO_default_write
__P ((_IO_FILE
*, const void *,
346 extern _IO_ssize_t _IO_default_read
__P ((_IO_FILE
*, void *, _IO_ssize_t
));
347 extern int _IO_default_stat
__P ((_IO_FILE
*, void *));
348 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
349 extern _IO_fpos64_t _IO_default_seek
__P ((_IO_FILE
*, _IO_off64_t
, int));
351 extern _IO_fpos_t _IO_default_seek
__P ((_IO_FILE
*, _IO_off_t
, int));
353 extern int _IO_default_sync
__P ((_IO_FILE
*));
354 #define _IO_default_close ((_IO_close_t) _IO_default_sync)
356 extern struct _IO_jump_t _IO_file_jumps
;
357 extern struct _IO_jump_t _IO_streambuf_jumps
;
358 extern struct _IO_jump_t _IO_proc_jumps
;
359 extern struct _IO_jump_t _IO_str_jumps
;
360 extern int _IO_do_write
__P ((_IO_FILE
*, const char *, _IO_size_t
));
361 extern int _IO_flush_all
__P ((void));
362 extern void _IO_cleanup
__P ((void));
363 extern void _IO_flush_all_linebuffered
__P ((void));
365 #define _IO_do_flush(_f) \
366 _IO_do_write(_f, (_f)->_IO_write_base, \
367 (_f)->_IO_write_ptr-(_f)->_IO_write_base)
368 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
369 #define _IO_mask_flags(fp, f, mask) \
370 ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
371 #define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\
372 (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
373 #define _IO_setp(__fp, __p, __ep) \
374 ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep))
375 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
376 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
377 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
378 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
380 /* Jumptable functions for files. */
382 extern int _IO_file_doallocate
__P ((_IO_FILE
*));
383 extern _IO_FILE
* _IO_file_setbuf
__P ((_IO_FILE
*, char *, _IO_ssize_t
));
384 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
385 extern _IO_fpos64_t _IO_file_seekoff
__P ((_IO_FILE
*, _IO_off64_t
, int, int));
386 extern _IO_fpos64_t _IO_file_seek
__P ((_IO_FILE
*, _IO_off64_t
, int));
388 extern _IO_fpos_t _IO_file_seekoff
__P ((_IO_FILE
*, _IO_off_t
, int, int));
389 extern _IO_fpos_t _IO_file_seek
__P ((_IO_FILE
*, _IO_off_t
, int));
391 extern _IO_size_t _IO_file_xsputn
__P ((_IO_FILE
*, const void *, _IO_size_t
));
392 extern int _IO_file_stat
__P ((_IO_FILE
*, void *));
393 extern int _IO_file_close
__P ((_IO_FILE
*));
394 extern int _IO_file_underflow
__P ((_IO_FILE
*));
395 extern int _IO_file_overflow
__P ((_IO_FILE
*, int));
396 #define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0)
397 extern void _IO_file_init
__P ((_IO_FILE
*));
398 extern _IO_FILE
* _IO_file_attach
__P ((_IO_FILE
*, int));
399 extern _IO_FILE
* _IO_file_open
__P ((_IO_FILE
*, const char *, int, int,
401 #if _G_IO_IO_FILE_VERSION == 0x20001
402 extern _IO_FILE
* _IO_file_fopen
__P ((_IO_FILE
*, const char *, const char *,
405 extern _IO_FILE
* _IO_file_fopen
__P ((_IO_FILE
*, const char *, const char *));
407 extern _IO_ssize_t _IO_file_write
__P ((_IO_FILE
*, const void *,
409 extern _IO_ssize_t _IO_file_read
__P ((_IO_FILE
*, void *, _IO_ssize_t
));
410 extern int _IO_file_sync
__P ((_IO_FILE
*));
411 extern int _IO_file_close_it
__P ((_IO_FILE
*));
412 extern void _IO_file_finish
__P ((_IO_FILE
*, int));
414 /* Jumptable functions for proc_files. */
415 extern _IO_FILE
* _IO_proc_open
__P ((_IO_FILE
*, const char *, const char *));
416 extern int _IO_proc_close
__P ((_IO_FILE
*));
418 /* Jumptable functions for strfiles. */
419 extern int _IO_str_underflow
__P ((_IO_FILE
*));
420 extern int _IO_str_overflow
__P ((_IO_FILE
*, int));
421 extern int _IO_str_pbackfail
__P ((_IO_FILE
*, int));
422 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
423 extern _IO_fpos64_t _IO_str_seekoff
__P ((_IO_FILE
*, _IO_off64_t
, int, int));
425 extern _IO_fpos_t _IO_str_seekoff
__P ((_IO_FILE
*, _IO_off_t
, int, int));
427 extern void _IO_str_finish
__P ((_IO_FILE
*, int));
429 /* Other strfile functions */
430 extern void _IO_str_init_static
__P ((_IO_FILE
*, char *, int, char *));
431 extern void _IO_str_init_readonly
__P ((_IO_FILE
*, const char *, int));
432 extern _IO_ssize_t _IO_str_count
__P ((_IO_FILE
*));
434 extern int _IO_vasprintf
__P ((char **result_ptr
, __const
char *format
,
436 extern int _IO_vdprintf
__P ((int d
, __const
char *format
, _IO_va_list arg
));
437 extern int _IO_vsnprintf
__P ((char *string
, _IO_size_t maxlen
,
438 __const
char *format
, _IO_va_list args
));
441 extern _IO_size_t _IO_getline
__P ((_IO_FILE
*,char *, _IO_size_t
, int, int));
442 extern _IO_size_t _IO_getline_info
__P ((_IO_FILE
*,char *, _IO_size_t
,
444 extern _IO_ssize_t _IO_getdelim
__P ((char **, _IO_size_t
*, int, _IO_FILE
*));
445 extern double _IO_strtod
__P ((const char *, char **));
446 extern char *_IO_dtoa
__P ((double __d
, int __mode
, int __ndigits
,
447 int *__decpt
, int *__sign
, char **__rve
));
448 extern int _IO_outfloat
__P ((double __value
, _IO_FILE
*__sb
, int __type
,
449 int __width
, int __precision
, int __flags
,
450 int __sign_mode
, int __fill
));
452 extern _IO_FILE
*_IO_list_all
;
453 extern void (*_IO_cleanup_registration_needed
) __PMT ((void));
459 # if defined __GNUG__ && \
460 (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
461 # define NULL (__null)
463 # if !defined(__cplusplus)
464 # define NULL ((void*)0)
475 # include <sys/mman.h>
476 # include <sys/param.h>
478 # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
479 # define MAP_ANONYMOUS MAP_ANON
482 # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
484 # define _G_HAVE_MMAP 0
487 #endif /* _G_HAVE_MMAP */
492 /* When using this code in the GNU libc we must not pollute the name space. */
494 # define munmap __munmap
497 # define ROUND_TO_PAGE(_S) \
498 (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
500 # define FREE_BUF(_B, _S) \
501 munmap ((_B), ROUND_TO_PAGE (_S))
502 # define ALLOC_BUF(_B, _S, _R) \
504 (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S), \
505 PROT_READ | PROT_WRITE, \
506 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
507 if ((_B) == (char *) -1) \
511 #else /* _G_HAVE_MMAP */
513 # define FREE_BUF(_B, _S) \
515 # define ALLOC_BUF(_B, _S, _R) \
517 (_B) = (char*)malloc(_S); \
522 #endif /* _G_HAVE_MMAP */
525 # define OS_FSTAT fstat
528 extern _IO_ssize_t _IO_read
__P ((int, void *, _IO_size_t
));
529 extern _IO_ssize_t _IO_write
__P ((int, const void *, _IO_size_t
));
530 extern _IO_off_t _IO_lseek
__P ((int, _IO_off_t
, int));
531 extern int _IO_close
__P ((int));
532 extern int _IO_fstat
__P ((int, struct stat
*));
533 extern int _IO_vscanf
__P ((const char *, _IO_va_list
));
535 /* Operations on _IO_fpos_t.
536 Normally, these are trivial, but we provide hooks for configurations
537 where an _IO_fpos_t is a struct.
538 Note that _IO_off_t must be an integral type. */
540 /* _IO_pos_BAD is an _IO_fpos_t value indicating error, unknown, or EOF. */
542 # if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
543 # define _IO_pos_BAD ((_IO_fpos64_t) -1)
545 # define _IO_pos_BAD ((_IO_fpos_t) -1)
548 /* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */
549 #ifndef _IO_pos_as_off
550 # if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
551 # define _IO_pos_as_off(__pos) ((_IO_off64_t) (__pos))
553 # define _IO_pos_as_off(__pos) ((_IO_off_t) (__pos))
556 /* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */
557 #ifndef _IO_pos_adjust
558 # define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta))
560 /* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */
562 # if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
563 # define _IO_pos_0 ((_IO_fpos64_t) 0)
565 # define _IO_pos_0 ((_IO_fpos_t) 0)
574 /* check following! */
575 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
576 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
577 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD, \
578 0, 0, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
580 /* check following! */
581 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
582 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
583 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD }
586 /* VTABLE_LABEL defines NAME as of the CLASS class.
587 CNLENGTH is strlen(#CLASS). */
589 # if _G_VTABLE_LABEL_HAS_LENGTH
590 # define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
591 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
593 # define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
594 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
596 #endif /* __GNUC__ */
598 #if !defined(builtinbuf_vtable) && defined(__cplusplus)
600 VTABLE_LABEL(builtinbuf_vtable
, builtinbuf
, 10)
602 # if _G_VTABLE_LABEL_HAS_LENGTH
603 # define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
605 # define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
608 #endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
610 #if defined(__STDC__) || defined(__cplusplus)
611 # define _IO_va_start(args, last) va_start(args, last)
613 # define _IO_va_start(args, last) va_start(args)
616 extern struct _IO_fake_stdiobuf _IO_stdin_buf
, _IO_stdout_buf
, _IO_stderr_buf
;
619 # define COERCE_FILE(FILE) /* Nothing */
621 /* This is part of the kludge for binary compatibility with old stdio. */
622 # define COERCE_FILE(FILE) \
623 (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
624 && (FILE) = *(FILE**)&((int*)fp)[1])
628 # define MAYBE_SET_EINVAL __set_errno (EINVAL)
630 # define MAYBE_SET_EINVAL /* nothing */
634 # define CHECK_FILE(FILE, RET) \
635 if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
636 else { COERCE_FILE(FILE); \
637 if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
638 { MAYBE_SET_EINVAL; return RET; }}
640 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)