2 Copyright (C) 1993 Free Software Foundation
4 This file is part of the GNU IO Library. This library is free
5 software; you can redistribute it and/or modify it under the
6 terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option)
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this library; see the file COPYING. If not, write to the Free
17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 As a special exception, if you link this library with files
20 compiled with a GNU compiler to produce an executable, this does not cause
21 the resulting executable to be covered by the GNU General Public License.
22 This exception does not however invalidate any other reasons why
23 the executable file might be covered by the GNU General Public License. */
32 #if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(__cplusplus)
33 /* All known AIX compilers implement these things (but don't always
34 define __STDC__). The RISC/OS MIPS compiler defines these things
35 in SVR4 mode, but does not define __STDC__. */
38 #define DEFUN(name, arglist, args) name(args)
39 #define DEFUN_VOID(name) name(void)
41 #else /* Not ANSI C. */
44 #ifndef const /* some systems define it in header files for non-ansi mode */
47 #define DEFUN(name, arglist, args) name arglist args;
48 #define DEFUN_VOID(name) name()
55 #define _IO_seek_set 0
56 #define _IO_seek_cur 1
57 #define _IO_seek_end 2
59 /* THE JUMPTABLE FUNCTIONS.
61 * The _IO_FILE type is used to implement the FILE type in GNU libc,
62 * as well as the streambuf class in GNU iostreams for C++.
63 * These are all the same, just used differently.
64 * An _IO_FILE (or FILE) object is allows followed by a pointer to
65 * a jump table (of pointers to functions). The pointer is accessed
66 * with the _IO_JUMPS macro. The jump table has a eccentric format,
67 * so as to be compatible with the layout of a C++ virtual function table.
68 * (as implemented by g++). When a pointer to a steambuf object is
69 * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
70 * happens to point to the virtual function table of the streambuf.
71 * Thus the _IO_JUMPS function table used for C stdio/libio does
72 * double duty as the virtual functiuon table for C++ streambuf.
74 * The entries in the _IO_JUMPS function table (and hence also the
75 * virtual functions of a streambuf) are described below.
76 * The first parameter of each function entry is the _IO_FILE/streambuf
77 * object being acted on (i.e. the 'this' parameter).
80 #define _IO_JUMPS(THIS) ((struct _IO_FILE_plus*)(THIS))->vtable
81 #ifdef _G_USING_THUNKS
82 #define JUMP_FIELD(TYPE, NAME) TYPE NAME
83 #define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC(THIS)
84 #define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC(THIS, X1)
85 #define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC(THIS, X1, X2)
86 #define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC(THIS, X1,X2, X3)
87 #define JUMP_INIT(NAME, VALUE) VALUE
88 #define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT(dummy2, 0)
90 /* These macros will change when we re-implement vtables to use "thunks"! */
91 #define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
92 #define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC.pfn(THIS)
93 #define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1)
94 #define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1, X2)
95 #define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1,X2, X3)
96 #define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
97 #define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
100 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
101 It does not delete (free) it, but does everything else to finalize it/
102 It matches the streambuf::~streambuf virtual destructor. */
103 typedef void (*_IO_finish_t
) __P((_IO_FILE
*)); /* finalize */
104 #define _IO_FINISH(FP) JUMP0(__finish, FP)
106 /* The 'overflow' hook flushes the buffer.
107 The second argument is a character, or EOF.
108 It matches the streambuf::overflow virtual function. */
109 typedef int (*_IO_overflow_t
) __P((_IO_FILE
*, int));
110 #define _IO_OVERFLOW(FP, CH) JUMP1(__overflow, FP, CH)
112 /* The 'underflow' hook tries to fills the get buffer.
113 It returns the next character (as an unsigned char) or EOF. The next
114 character remains in the get buffer, and the get postion is not changed.
115 It matches the streambuf::underflow virtual function. */
116 typedef int (*_IO_underflow_t
) __P((_IO_FILE
*));
117 #define _IO_UNDERFLOW(FP) JUMP0(__underflow, FP)
119 /* The 'uflow' hook returns the next character in the input stream
120 (cast to unsigned char), and increments the read position;
121 EOF is returned on failure.
122 It matches the streambuf::uflow virtual function, which is not in the
123 cfront implementation, but was added to C++ by the ANSI/ISO committee. */
124 #define _IO_UFLOW(FP) JUMP0(__uflow, FP)
126 /* The 'pbackfail' hook handles backing up.
127 It matches the streambuf::pbackfail virtual function. */
128 typedef int (*_IO_pbackfail_t
) __P((_IO_FILE
*, int));
129 #define _IO_PBACKFAIL(FP, CH) JUMP1(__pbackfail, FP, CH)
131 /* The 'xsputn' hook writes upto N characters from buffer DATA.
132 Returns the number of character actually written.
133 It matches the streambuf::xsputn virtual function. */
134 typedef _IO_size_t (*_IO_xsputn_t
)
135 __P((_IO_FILE
*FP
, const void *DATA
, _IO_size_t N
));
136 #define _IO_XSPUTN(FP, DATA, N) JUMP2(__xsputn, FP, DATA, N)
138 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
139 Returns the number of character actually read.
140 It matches the streambuf::xsgetn virtual function. */
141 typedef _IO_size_t (*_IO_xsgetn_t
) __P((_IO_FILE
*FP
, void*DATA
, _IO_size_t N
));
142 #define _IO_XSGETN(FP, DATA, N) JUMP2(__xsgetn, FP, DATA, N)
144 /* The 'seekoff' hook moves the stream position to a new position
145 relative to the start of the file (if DIR==0), the current position
146 (MODE==1), or the end of the file (MODE==2).
147 It matches the streambuf::seekoff virtual function.
148 It is also used for the ANSI fseek function. */
149 typedef _IO_fpos_t (*_IO_seekoff_t
)
150 __P((_IO_FILE
* FP
, _IO_off_t OFF
, int DIR, int MODE
));
151 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3(__seekoff, FP, OFF, DIR, MODE)
153 /* The 'seekpos' hook also moves the stream position,
154 but to an absolute position given by a fpos_t (seekpos).
155 It matches the streambuf::seekpos virtual function.
156 It is also used for the ANSI fgetpos and fsetpos functions. */
157 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
158 typedef _IO_fpos_t (*_IO_seekpos_t
) __P((_IO_FILE
*, _IO_fpos_t
, int));
159 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2(__seekpos, FP, POS, FLAGS)
161 /* The 'setbuf' hook gives a buffer to the file.
162 It matches the streambuf::setbuf virtual function. */
163 typedef _IO_FILE
* (*_IO_setbuf_t
) __P((_IO_FILE
*, char *, _IO_ssize_t
));
164 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2(__setbuf, FP, BUFFER, LENGTH)
166 /* The 'sync' hook attempts to synchronize the internal data structures
167 of the file with the external state.
168 It matches the streambuf::sync virtual function. */
169 typedef int (*_IO_sync_t
) __P((_IO_FILE
*));
170 #define _IO_SYNC(FP) JUMP0(__sync, FP)
172 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
173 It matches the streambuf::doallocate virtual function, which is not
174 in the ANSI/ISO C++ standard, but is part traditional implementations. */
175 typedef int (*_IO_doallocate_t
) __P((_IO_FILE
*));
176 #define _IO_DOALLOCATE(FP) JUMP0(__doallocate, FP)
178 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
179 sysstat) are low-level hooks specific to this implementation.
180 There is no correspondance in the ANSI/ISO C++ standard library.
181 The hooks basically correspond to the Unix system functions
182 (read, write, close, lseek, and stat) except that a _IO_FILE*
183 parameter is used instead of a integer file descriptor; the default
184 implementation used for normal files just calls those functions.
185 The advantage of overriding these functions instead of the higher-level
186 ones (underflow, overflow etc) is that you can leave all the buffering
187 higher-level functions. */
189 /* The 'sysread' hook is used to read data from the external file into
190 an existing buffer. It generalizes the Unix read(2) function.
191 It matches the streambuf::sys_read virtual function, which is
192 specific to this implementaion. */
193 typedef _IO_ssize_t (*_IO_read_t
) __P((_IO_FILE
*, void*, _IO_ssize_t
));
194 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2(__read, FP, DATA, LEN)
196 /* The 'syswrite' hook is used to write data from an existing buffer
197 to an external file. It generalizes the Unix write(2) function.
198 It matches the streambuf::sys_write virtual function, which is
199 specific to this implementaion. */
200 typedef _IO_ssize_t (*_IO_write_t
) __P((_IO_FILE
*,const void*,_IO_ssize_t
));
201 #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2(__write, FP, DATA, LEN)
203 /* The 'sysseek' hook is used to re-position an external file.
204 It generalizes the Unix lseek(2) function.
205 It matches the streambuf::sys_seek virtual function, which is
206 specific to this implementaion. */
207 typedef _IO_fpos_t (*_IO_seek_t
) __P((_IO_FILE
*, _IO_off_t
, int));
208 #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2(__seek, FP, OFFSET, MODE)
210 /* The 'sysclose' hook is used to finalize (close, finish up) an
211 external file. It generalizes the Unix close(2) function.
212 It matches the streambuf::sys_close virtual function, which is
213 specific to this implementation. */
214 typedef int (*_IO_close_t
) __P((_IO_FILE
*)); /* finalize */
215 #define _IO_SYSCLOSE(FP) JUMP0(__close, FP)
217 /* The 'sysstat' hook is used to get information about an external file
218 into a struct stat buffer. It generalizes the Unix fstat(2) call.
219 It matches the streambuf::sys_stat virtual function, which is
220 specific to this implementaion. */
221 typedef int (*_IO_stat_t
) __P((_IO_FILE
*, void*));
222 #define _IO_SYSSTAT(FP, BUF) JUMP1(__stat, FP, BUF)
225 #define _IO_CHAR_TYPE char /* unsigned char ? */
226 #define _IO_INT_TYPE int
229 JUMP_FIELD(_G_size_t
, __dummy
);
230 #ifdef _G_USING_THUNKS
231 JUMP_FIELD(_G_size_t
, __dummy2
);
233 JUMP_FIELD(_IO_finish_t
, __finish
);
234 JUMP_FIELD(_IO_overflow_t
, __overflow
);
235 JUMP_FIELD(_IO_underflow_t
, __underflow
);
236 JUMP_FIELD(_IO_underflow_t
, __uflow
);
237 JUMP_FIELD(_IO_pbackfail_t
, __pbackfail
);
239 JUMP_FIELD(_IO_xsputn_t
, __xsputn
);
240 JUMP_FIELD(_IO_xsgetn_t
, __xsgetn
);
241 JUMP_FIELD(_IO_seekoff_t
, __seekoff
);
242 JUMP_FIELD(_IO_seekpos_t
, __seekpos
);
243 JUMP_FIELD(_IO_setbuf_t
, __setbuf
);
244 JUMP_FIELD(_IO_sync_t
, __sync
);
245 JUMP_FIELD(_IO_doallocate_t
, __doallocate
);
246 JUMP_FIELD(_IO_read_t
, __read
);
247 JUMP_FIELD(_IO_write_t
, __write
);
248 JUMP_FIELD(_IO_seek_t
, __seek
);
249 JUMP_FIELD(_IO_close_t
, __close
);
250 JUMP_FIELD(_IO_stat_t
, __stat
);
257 /* We always allocate an extra word following an _IO_FILE.
258 This contains a pointer to the function jump table used.
259 This is for compatibility with C++ streambuf; the word can
260 be used to smash to a pointer to a virtual function table. */
262 struct _IO_FILE_plus
{
264 const struct _IO_jump_t
*vtable
;
267 /* Generic functions */
269 extern int _IO_switch_to_get_mode
__P((_IO_FILE
*));
270 extern void _IO_init
__P((_IO_FILE
*, int));
271 extern int _IO_sputbackc
__P((_IO_FILE
*, int));
272 extern int _IO_sungetc
__P((_IO_FILE
*));
273 extern void _IO_un_link
__P((_IO_FILE
*));
274 extern void _IO_link_in
__P((_IO_FILE
*));
275 extern void _IO_doallocbuf
__P((_IO_FILE
*));
276 extern void _IO_unsave_markers
__P((_IO_FILE
*));
277 extern void _IO_setb
__P((_IO_FILE
*, char*, char*, int));
278 extern unsigned _IO_adjust_column
__P((unsigned, const char *, int));
279 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN(__fp, __s, __n)
281 /* Marker-related function. */
283 extern void _IO_init_marker
__P((struct _IO_marker
*, _IO_FILE
*));
284 extern void _IO_remove_marker
__P((struct _IO_marker
*));
285 extern int _IO_marker_difference
__P((struct _IO_marker
*, struct _IO_marker
*));
286 extern int _IO_marker_delta
__P((struct _IO_marker
*));
287 extern int _IO_seekmark
__P((_IO_FILE
*, struct _IO_marker
*, int));
289 /* Default jumptable functions. */
291 extern int _IO_default_underflow
__P((_IO_FILE
*));
292 extern int _IO_default_uflow
__P((_IO_FILE
*));
293 extern int _IO_default_doallocate
__P((_IO_FILE
*));
294 extern void _IO_default_finish
__P((_IO_FILE
*));
295 extern int _IO_default_pbackfail
__P((_IO_FILE
*, int));
296 extern _IO_FILE
* _IO_default_setbuf
__P((_IO_FILE
*, char*, _IO_ssize_t
));
297 extern _IO_size_t _IO_default_xsputn
__P((_IO_FILE
*, const void*, _IO_size_t
));
298 extern _IO_size_t _IO_default_xsgetn
__P((_IO_FILE
*, void*, _IO_size_t
));
299 extern _IO_fpos_t _IO_default_seekoff
__P((_IO_FILE
*, _IO_off_t
, int, int));
300 extern _IO_fpos_t _IO_default_seekpos
__P((_IO_FILE
*, _IO_fpos_t
, int));
301 extern _IO_ssize_t _IO_default_write
__P((_IO_FILE
*,const void*,_IO_ssize_t
));
302 extern _IO_ssize_t _IO_default_read
__P((_IO_FILE
*, void*, _IO_ssize_t
));
303 extern int _IO_default_stat
__P((_IO_FILE
*, void*));
304 extern _IO_fpos_t _IO_default_seek
__P((_IO_FILE
*, _IO_off_t
, int));
305 extern int _IO_default_sync
__P((_IO_FILE
*));
306 #define _IO_default_close ((_IO_close_t)_IO_default_sync)
308 extern struct _IO_jump_t _IO_file_jumps
;
309 extern struct _IO_jump_t _IO_streambuf_jumps
;
310 extern struct _IO_jump_t _IO_proc_jumps
;
311 extern struct _IO_jump_t _IO_str_jumps
;
312 extern int _IO_do_write
__P((_IO_FILE
*, const char*, _IO_size_t
));
313 extern int _IO_flush_all
__P((void));
314 extern void _IO_cleanup
__P((void));
315 extern void _IO_flush_all_linebuffered
__P((void));
317 #define _IO_do_flush(_f) \
318 _IO_do_write(_f, (_f)->_IO_write_base, \
319 (_f)->_IO_write_ptr-(_f)->_IO_write_base)
320 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
321 #define _IO_mask_flags(fp, f, mask) \
322 ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
323 #define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\
324 (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
325 #define _IO_setp(__fp, __p, __ep) \
326 ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep))
327 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
328 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
329 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
330 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
332 /* Jumptable functions for files. */
334 extern int _IO_file_doallocate
__P((_IO_FILE
*));
335 extern _IO_FILE
* _IO_file_setbuf
__P((_IO_FILE
*, char*, _IO_ssize_t
));
336 extern _IO_fpos_t _IO_file_seekoff
__P((_IO_FILE
*, _IO_off_t
, int, int));
337 extern _IO_size_t _IO_file_xsputn
__P((_IO_FILE
*,const void*,_IO_size_t
));
338 extern int _IO_file_stat
__P((_IO_FILE
*, void*));
339 extern int _IO_file_close
__P((_IO_FILE
*));
340 extern int _IO_file_underflow
__P((_IO_FILE
*));
341 extern int _IO_file_overflow
__P((_IO_FILE
*, int));
342 #define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0)
343 extern void _IO_file_init
__P((_IO_FILE
*));
344 extern _IO_FILE
* _IO_file_fopen
__P((_IO_FILE
*, const char*, const char*));
345 extern _IO_ssize_t _IO_file_write
__P((_IO_FILE
*,const void*,_IO_ssize_t
));
346 extern _IO_ssize_t _IO_file_read
__P((_IO_FILE
*, void*, _IO_ssize_t
));
347 extern int _IO_file_sync
__P((_IO_FILE
*));
348 extern int _IO_file_close_it
__P((_IO_FILE
*));
349 extern _IO_fpos_t _IO_file_seek
__P((_IO_FILE
*, _IO_off_t
, int));
350 extern void _IO_file_finish
__P((_IO_FILE
*));
352 /* Other file functions. */
353 extern _IO_FILE
* _IO_file_attach
__P((_IO_FILE
*, int));
355 /* Jumptable functions for proc_files. */
356 extern _IO_FILE
* _IO_proc_open
__P((_IO_FILE
*, const char*, const char *));
357 extern int _IO_proc_close
__P((_IO_FILE
*));
359 /* Jumptable functions for strfiles. */
360 extern int _IO_str_underflow
__P((_IO_FILE
*));
361 extern int _IO_str_overflow
__P((_IO_FILE
*, int));
362 extern int _IO_str_pbackfail
__P((_IO_FILE
*, int));
363 extern _IO_fpos_t _IO_str_seekoff
__P((_IO_FILE
*,_IO_off_t
,int,int));
365 /* Other strfile functions */
366 extern void _IO_str_init_static
__P((_IO_FILE
*, char*, int, char*));
367 extern void _IO_str_init_readonly
__P((_IO_FILE
*, const char*, int));
368 extern _IO_ssize_t _IO_str_count
__P ((_IO_FILE
*));
370 extern _IO_size_t _IO_getline
__P((_IO_FILE
*,char*,_IO_size_t
,int,int));
371 extern _IO_ssize_t _IO_getdelim
__P((char**, _IO_size_t
*, int, _IO_FILE
*));
372 extern double _IO_strtod
__P((const char *, char **));
373 extern char * _IO_dtoa
__P((double __d
, int __mode
, int __ndigits
,
374 int *__decpt
, int *__sign
, char **__rve
));
375 extern int _IO_outfloat
__P((double __value
, _IO_FILE
*__sb
, int __type
,
376 int __width
, int __precision
, int __flags
,
377 int __sign_mode
, int __fill
));
379 extern _IO_FILE
*_IO_list_all
;
380 extern void (*_IO_cleanup_registration_needed
) __P ((void));
387 #define NULL (__null)
389 #if !defined(__cplusplus)
390 #define NULL ((void*)0)
397 #define FREE_BUF(_B) free(_B)
398 #define ALLOC_BUF(_S) (char*)malloc(_S)
401 #define OS_FSTAT fstat
404 extern _IO_ssize_t _IO_read
__P((int, void*, _IO_size_t
));
405 extern _IO_ssize_t _IO_write
__P((int, const void*, _IO_size_t
));
406 extern _IO_off_t _IO_lseek
__P((int, _IO_off_t
, int));
407 extern int _IO_close
__P((int));
408 extern int _IO_fstat
__P((int, struct stat
*));
410 /* Operations on _IO_fpos_t.
411 Normally, these are trivial, but we provide hooks for configurations
412 where an _IO_fpos_t is a struct.
413 Note that _IO_off_t must be an integral type. */
415 /* _IO_pos_BAD is an _IO_fpos_t value indicating error, unknown, or EOF. */
417 #define _IO_pos_BAD ((_IO_fpos_t)(-1))
419 /* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */
420 #ifndef _IO_pos_as_off
421 #define _IO_pos_as_off(__pos) ((_IO_off_t)(__pos))
423 /* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */
424 #ifndef _IO_pos_adjust
425 #define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta))
427 /* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */
429 #define _IO_pos_0 ((_IO_fpos_t)0)
436 /* check following! */
437 #define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
438 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
439 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}
441 /* VTABLE_LABEL defines NAME as of the CLASS class.
442 CNLENGTH is strlen(#CLASS). */
444 #if _G_VTABLE_LABEL_HAS_LENGTH
445 #define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
446 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
448 #define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
449 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
451 #endif /* __GNUC__ */
453 #if !defined(builtinbuf_vtable) && defined(__cplusplus)
455 VTABLE_LABEL(builtinbuf_vtable
, builtinbuf
, 10)
457 #if _G_VTABLE_LABEL_HAS_LENGTH
458 #define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
460 #define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
463 #endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
465 #if defined(__STDC__) || defined(__cplusplus)
466 #define _IO_va_start(args, last) va_start(args, last)
468 #define _IO_va_start(args, last) va_start(args)
471 extern struct _IO_fake_stdiobuf _IO_stdin_buf
, _IO_stdout_buf
, _IO_stderr_buf
;
474 #define COERCE_FILE(FILE) /* Nothing */
476 /* This is part of the kludge for binary compatibility with old stdio. */
477 #define COERCE_FILE(FILE) \
478 (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
479 && (FILE) = *(FILE**)&((int*)fp)[1])
483 #define MAYBE_SET_EINVAL errno = EINVAL
485 #define MAYBE_SET_EINVAL /* nothing */
489 #define CHECK_FILE(FILE,RET) \
490 if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
491 else { COERCE_FILE(FILE); \
492 if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
493 { errno = EINVAL; return RET; }}
495 #define CHECK_FILE(FILE,RET) \