libio/libioP.h

   1 /* Copyright (C) 1993, 1997-2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.
  18
  19    As a special exception, if you link the code in this file with
  20    files compiled with a GNU compiler to produce an executable,
  21    that does not cause the resulting executable to be covered by
  22    the GNU Lesser General Public License.  This exception does not
  23    however invalidate any other reasons why the executable file
  24    might be covered by the GNU Lesser General Public License.
  25    This exception applies to code released by its copyright holders
  26    in files containing the exception.  */
  27
  28 #include <errno.h>
  29 #ifndef __set_errno
  30 # define __set_errno(Val) errno = (Val)
  31 #endif
  32 #if defined __GLIBC__ && __GLIBC__ >= 2
  33 # include <bits/libc-lock.h>
  34 #else
  35 /*# include <comthread.h>*/
  36 #endif
  37
  38 #include "iolibio.h"
  39
  40 /* Control of exported symbols.  Used in glibc.  By default we don't
  41    do anything.  */
  42 #ifndef INTUSE
  43 # define INTUSE(name) name
  44 #endif
  45 #ifndef INTDEF
  46 # define INTDEF(name)
  47 #endif
  48 #ifndef INTDEF2
  49 # define INTDEF2(name)
  50 #endif
  51 #ifndef libc_hidden_proto
  52 # define libc_hidden_proto(name)
  53 #endif
  54 #ifndef libc_hidden_def
  55 # define libc_hidden_def(name)
  56 #endif
  57 #ifndef libc_hidden_weak
  58 # define libc_hidden_weak(name)
  59 #endif
  60
  61 #ifdef __cplusplus
  62 extern "C" {
  63 #endif
  64
  65 #define _IO_seek_set 0
  66 #define _IO_seek_cur 1
  67 #define _IO_seek_end 2
  68
  69 /* THE JUMPTABLE FUNCTIONS.
  70
  71  * The _IO_FILE type is used to implement the FILE type in GNU libc,
  72  * as well as the streambuf class in GNU iostreams for C++.
  73  * These are all the same, just used differently.
  74  * An _IO_FILE (or FILE) object is allows followed by a pointer to
  75  * a jump table (of pointers to functions).  The pointer is accessed
  76  * with the _IO_JUMPS macro.  The jump table has a eccentric format,
  77  * so as to be compatible with the layout of a C++ virtual function table.
  78  * (as implemented by g++).  When a pointer to a streambuf object is
  79  * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
  80  * happens to point to the virtual function table of the streambuf.
  81  * Thus the _IO_JUMPS function table used for C stdio/libio does
  82  * double duty as the virtual function table for C++ streambuf.
  83  *
  84  * The entries in the _IO_JUMPS function table (and hence also the
  85  * virtual functions of a streambuf) are described below.
  86  * The first parameter of each function entry is the _IO_FILE/streambuf
  87  * object being acted on (i.e. the 'this' parameter).
  88  */
  89
  90 #ifdef _LIBC
  91 # include <shlib-compat.h>
  92 # if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
  93    /* Setting this macro disables the use of the _vtable_offset
  94       bias in _IO_JUMPS_FUNCS, below.  That is only needed if we
  95       want to support old binaries (see oldfileops.c).  */
  96 #  define _G_IO_NO_BACKWARD_COMPAT 1
  97 # endif
  98 #endif
  99
 100 #if (!defined _IO_USE_OLD_IO_FILE \
 101      && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
 102 # define _IO_JUMPS_OFFSET 1
 103 #endif
 104
 105 #define _IO_JUMPS(THIS) (THIS)->vtable
 106 #define _IO_WIDE_JUMPS(THIS) ((struct _IO_FILE *) (THIS))->_wide_data->_wide_vtable
 107 #define _IO_CHECK_WIDE(THIS) (((struct _IO_FILE *) (THIS))->_wide_data != NULL)
 108
 109 #if _IO_JUMPS_OFFSET
 110 # define _IO_JUMPS_FUNC(THIS) \
 111  (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS ((struct _IO_FILE_plus *) (THIS)) \
 112                            + (THIS)->_vtable_offset))
 113 # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset
 114 #else
 115 # define _IO_JUMPS_FUNC(THIS) _IO_JUMPS ((struct _IO_FILE_plus *) (THIS))
 116 # define _IO_vtable_offset(THIS) 0
 117 #endif
 118 #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS)
 119 #ifdef _G_USING_THUNKS
 120 # define JUMP_FIELD(TYPE, NAME) TYPE NAME
 121 # define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS)
 122 # define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 123 # define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 124 # define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 125 # define JUMP_INIT(NAME, VALUE) VALUE
 126 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
 127
 128 # define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS)
 129 # define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 130 # define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 131 # define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 132 #else
 133 /* These macros will change when we re-implement vtables to use "thunks"! */
 134 # define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
 135 # define JUMP0(FUNC, THIS) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 136 # define JUMP1(FUNC, THIS, X1) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 137 # define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 138 # define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 139 # define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
 140 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
 141
 142 # define WJUMP0(FUNC, THIS) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 143 # define WJUMP1(FUNC, THIS, X1) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 144 # define WJUMP2(FUNC, THIS, X1, X2) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 145 # define WJUMP3(FUNC, THIS, X1,X2,X3) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 146 #endif
 147
 148 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
 149    It does not delete (free) it, but does everything else to finalize it.
 150    It matches the streambuf::~streambuf virtual destructor.  */
 151 typedef void (*_IO_finish_t) __PMT ((_IO_FILE *, int)); /* finalize */
 152 #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
 153 #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0)
 154
 155 /* The 'overflow' hook flushes the buffer.
 156    The second argument is a character, or EOF.
 157    It matches the streambuf::overflow virtual function. */
 158 typedef int (*_IO_overflow_t) __PMT ((_IO_FILE *, int));
 159 #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
 160 #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH)
 161
 162 /* The 'underflow' hook tries to fills the get buffer.
 163    It returns the next character (as an unsigned char) or EOF.  The next
 164    character remains in the get buffer, and the get position is not changed.
 165    It matches the streambuf::underflow virtual function. */
 166 typedef int (*_IO_underflow_t) __PMT ((_IO_FILE *));
 167 #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
 168 #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP)
 169
 170 /* The 'uflow' hook returns the next character in the input stream
 171    (cast to unsigned char), and increments the read position;
 172    EOF is returned on failure.
 173    It matches the streambuf::uflow virtual function, which is not in the
 174    cfront implementation, but was added to C++ by the ANSI/ISO committee. */
 175 #define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
 176 #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP)
 177
 178 /* The 'pbackfail' hook handles backing up.
 179    It matches the streambuf::pbackfail virtual function. */
 180 typedef int (*_IO_pbackfail_t) __PMT ((_IO_FILE *, int));
 181 #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
 182 #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH)
 183
 184 /* The 'xsputn' hook writes upto N characters from buffer DATA.
 185    Returns the number of character actually written.
 186    It matches the streambuf::xsputn virtual function. */
 187 typedef _IO_size_t (*_IO_xsputn_t) __PMT ((_IO_FILE *FP, const void *DATA,
 188                                            _IO_size_t N));
 189 #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
 190 #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N)
 191
 192 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
 193    Returns the number of character actually read.
 194    It matches the streambuf::xsgetn virtual function. */
 195 typedef _IO_size_t (*_IO_xsgetn_t) __PMT ((_IO_FILE *FP, void *DATA,
 196                                            _IO_size_t N));
 197 #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
 198 #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N)
 199
 200 /* The 'seekoff' hook moves the stream position to a new position
 201    relative to the start of the file (if DIR==0), the current position
 202    (MODE==1), or the end of the file (MODE==2).
 203    It matches the streambuf::seekoff virtual function.
 204    It is also used for the ANSI fseek function. */
 205 typedef _IO_off64_t (*_IO_seekoff_t) __PMT ((_IO_FILE *FP, _IO_off64_t OFF,
 206                                              int DIR, int MODE));
 207 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
 208 #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
 209
 210 /* The 'seekpos' hook also moves the stream position,
 211    but to an absolute position given by a fpos64_t (seekpos).
 212    It matches the streambuf::seekpos virtual function.
 213    It is also used for the ANSI fgetpos and fsetpos functions.  */
 214 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
 215 typedef _IO_off64_t (*_IO_seekpos_t) __PMT ((_IO_FILE *, _IO_off64_t, int));
 216 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
 217 #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS)
 218
 219 /* The 'setbuf' hook gives a buffer to the file.
 220    It matches the streambuf::setbuf virtual function. */
 221 typedef _IO_FILE* (*_IO_setbuf_t) __PMT ((_IO_FILE *, char *, _IO_ssize_t));
 222 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
 223 #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH)
 224
 225 /* The 'sync' hook attempts to synchronize the internal data structures
 226    of the file with the external state.
 227    It matches the streambuf::sync virtual function. */
 228 typedef int (*_IO_sync_t) __PMT ((_IO_FILE *));
 229 #define _IO_SYNC(FP) JUMP0 (__sync, FP)
 230 #define _IO_WSYNC(FP) WJUMP0 (__sync, FP)
 231
 232 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
 233    It matches the streambuf::doallocate virtual function, which is not
 234    in the ANSI/ISO C++ standard, but is part traditional implementations. */
 235 typedef int (*_IO_doallocate_t) __PMT ((_IO_FILE *));
 236 #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
 237 #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP)
 238
 239 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
 240    sysstat) are low-level hooks specific to this implementation.
 241    There is no correspondence in the ANSI/ISO C++ standard library.
 242    The hooks basically correspond to the Unix system functions
 243    (read, write, close, lseek, and stat) except that a _IO_FILE*
 244    parameter is used instead of a integer file descriptor;  the default
 245    implementation used for normal files just calls those functions.
 246    The advantage of overriding these functions instead of the higher-level
 247    ones (underflow, overflow etc) is that you can leave all the buffering
 248    higher-level functions.  */
 249
 250 /* The 'sysread' hook is used to read data from the external file into
 251    an existing buffer.  It generalizes the Unix read(2) function.
 252    It matches the streambuf::sys_read virtual function, which is
 253    specific to this implementation. */
 254 typedef _IO_ssize_t (*_IO_read_t) __PMT ((_IO_FILE *, void *, _IO_ssize_t));
 255 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
 256 #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN)
 257
 258 /* The 'syswrite' hook is used to write data from an existing buffer
 259    to an external file.  It generalizes the Unix write(2) function.
 260    It matches the streambuf::sys_write virtual function, which is
 261    specific to this implementation. */
 262 typedef _IO_ssize_t (*_IO_write_t) __PMT ((_IO_FILE *, const void *,
 263                                            _IO_ssize_t));
 264 #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN)
 265 #define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN)
 266
 267 /* The 'sysseek' hook is used to re-position an external file.
 268    It generalizes the Unix lseek(2) function.
 269    It matches the streambuf::sys_seek virtual function, which is
 270    specific to this implementation. */
 271 typedef _IO_off64_t (*_IO_seek_t) __PMT ((_IO_FILE *, _IO_off64_t, int));
 272 #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE)
 273 #define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE)
 274
 275 /* The 'sysclose' hook is used to finalize (close, finish up) an
 276    external file.  It generalizes the Unix close(2) function.
 277    It matches the streambuf::sys_close virtual function, which is
 278    specific to this implementation. */
 279 typedef int (*_IO_close_t) __PMT ((_IO_FILE *)); /* finalize */
 280 #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP)
 281 #define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP)
 282
 283 /* The 'sysstat' hook is used to get information about an external file
 284    into a struct stat buffer.  It generalizes the Unix fstat(2) call.
 285    It matches the streambuf::sys_stat virtual function, which is
 286    specific to this implementation. */
 287 typedef int (*_IO_stat_t) __PMT ((_IO_FILE *, void *));
 288 #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF)
 289 #define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF)
 290
 291 /* The 'showmany' hook can be used to get an image how much input is
 292    available.  In many cases the answer will be 0 which means unknown
 293    but some cases one can provide real information.  */
 294 typedef int (*_IO_showmanyc_t) __PMT ((_IO_FILE *));
 295 #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP)
 296 #define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP)
 297
 298 /* The 'imbue' hook is used to get information about the currently
 299    installed locales.  */
 300 typedef void (*_IO_imbue_t) __PMT ((_IO_FILE *, void *));
 301 #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE)
 302 #define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE)
 303
 304
 305 #define _IO_CHAR_TYPE char /* unsigned char ? */
 306 #define _IO_INT_TYPE int
 307
 308 struct _IO_jump_t
 309 {
 310     JUMP_FIELD(_G_size_t, __dummy);
 311 #ifdef _G_USING_THUNKS
 312     JUMP_FIELD(_G_size_t, __dummy2);
 313 #endif
 314     JUMP_FIELD(_IO_finish_t, __finish);
 315     JUMP_FIELD(_IO_overflow_t, __overflow);
 316     JUMP_FIELD(_IO_underflow_t, __underflow);
 317     JUMP_FIELD(_IO_underflow_t, __uflow);
 318     JUMP_FIELD(_IO_pbackfail_t, __pbackfail);
 319     /* showmany */
 320     JUMP_FIELD(_IO_xsputn_t, __xsputn);
 321     JUMP_FIELD(_IO_xsgetn_t, __xsgetn);
 322     JUMP_FIELD(_IO_seekoff_t, __seekoff);
 323     JUMP_FIELD(_IO_seekpos_t, __seekpos);
 324     JUMP_FIELD(_IO_setbuf_t, __setbuf);
 325     JUMP_FIELD(_IO_sync_t, __sync);
 326     JUMP_FIELD(_IO_doallocate_t, __doallocate);
 327     JUMP_FIELD(_IO_read_t, __read);
 328     JUMP_FIELD(_IO_write_t, __write);
 329     JUMP_FIELD(_IO_seek_t, __seek);
 330     JUMP_FIELD(_IO_close_t, __close);
 331     JUMP_FIELD(_IO_stat_t, __stat);
 332     JUMP_FIELD(_IO_showmanyc_t, __showmanyc);
 333     JUMP_FIELD(_IO_imbue_t, __imbue);
 334 #if 0
 335     get_column;
 336     set_column;
 337 #endif
 338 };
 339
 340 /* We always allocate an extra word following an _IO_FILE.
 341    This contains a pointer to the function jump table used.
 342    This is for compatibility with C++ streambuf; the word can
 343    be used to smash to a pointer to a virtual function table. */
 344
 345 struct _IO_FILE_plus
 346 {
 347   _IO_FILE file;
 348   const struct _IO_jump_t *vtable;
 349 };
 350
 351 /* Special file type for fopencookie function.  */
 352 struct _IO_cookie_file
 353 {
 354   struct _IO_FILE_plus __fp;
 355   void *__cookie;
 356   _IO_cookie_io_functions_t __io_functions;
 357 };
 358
 359 _IO_FILE *_IO_fopencookie (void *cookie, const char *mode,
 360                            _IO_cookie_io_functions_t io_functions);
 361
 362
 363 /* Iterator type for walking global linked list of _IO_FILE objects. */
 364
 365 typedef struct _IO_FILE *_IO_ITER;
 366
 367 /* Generic functions */
 368
 369 extern void _IO_switch_to_main_get_area __P ((_IO_FILE *));
 370 extern void _IO_switch_to_backup_area __P ((_IO_FILE *));
 371 extern int _IO_switch_to_get_mode __P ((_IO_FILE *));
 372 extern void _IO_init __P ((_IO_FILE *, int));
 373 extern int _IO_sputbackc __P ((_IO_FILE *, int));
 374 extern int _IO_sungetc __P ((_IO_FILE *));
 375 extern void _IO_un_link __P ((struct _IO_FILE_plus *));
 376 extern void _IO_link_in __P ((struct _IO_FILE_plus *));
 377 extern void _IO_doallocbuf __P ((_IO_FILE *));
 378 extern void _IO_unsave_markers __P ((_IO_FILE *));
 379 extern void _IO_setb __P ((_IO_FILE *, char *, char *, int));
 380 extern unsigned _IO_adjust_column __P ((unsigned, const char *, int));
 381 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
 382
 383 extern void _IO_switch_to_main_wget_area __P ((_IO_FILE *));
 384 extern void _IO_switch_to_wbackup_area __P ((_IO_FILE *));
 385 extern int _IO_switch_to_wget_mode __P ((_IO_FILE *));
 386 extern void _IO_wsetb __P ((_IO_FILE *, wchar_t *, wchar_t *, int));
 387 extern wint_t _IO_sputbackwc __P ((_IO_FILE *, wint_t));
 388 extern wint_t _IO_sungetwc __P ((_IO_FILE *));
 389 extern void _IO_wdoallocbuf __P ((_IO_FILE *));
 390 extern void _IO_unsave_wmarkers __P ((_IO_FILE *));
 391 extern unsigned _IO_adjust_wcolumn __P ((unsigned, const wchar_t *, int));
 392
 393 /* Marker-related function. */
 394
 395 extern void _IO_init_marker __P ((struct _IO_marker *, _IO_FILE *));
 396 extern void _IO_init_wmarker __P ((struct _IO_marker *, _IO_FILE *));
 397 extern void _IO_remove_marker __P ((struct _IO_marker *));
 398 extern int _IO_marker_difference __P ((struct _IO_marker *,
 399                                        struct _IO_marker *));
 400 extern int _IO_marker_delta __P ((struct _IO_marker *));
 401 extern int _IO_wmarker_delta __P ((struct _IO_marker *));
 402 extern int _IO_seekmark __P ((_IO_FILE *, struct _IO_marker *, int));
 403 extern int _IO_seekwmark __P ((_IO_FILE *, struct _IO_marker *, int));
 404
 405 /* Functions for iterating global list and dealing with
 406    its lock */
 407
 408 extern _IO_ITER _IO_iter_begin __P ((void));
 409 libc_hidden_proto (_IO_iter_begin)
 410 extern _IO_ITER _IO_iter_end __P ((void));
 411 libc_hidden_proto (_IO_iter_end)
 412 extern _IO_ITER _IO_iter_next __P ((_IO_ITER));
 413 libc_hidden_proto (_IO_iter_next)
 414 extern _IO_FILE *_IO_iter_file __P ((_IO_ITER));
 415 libc_hidden_proto (_IO_iter_file)
 416 extern void _IO_list_lock __P ((void));
 417 libc_hidden_proto (_IO_list_lock)
 418 extern void _IO_list_unlock __P ((void));
 419 libc_hidden_proto (_IO_list_unlock)
 420 extern void _IO_list_resetlock __P ((void));
 421 libc_hidden_proto (_IO_list_resetlock)
 422
 423 /* Default jumptable functions. */
 424
 425 extern int _IO_default_underflow __P ((_IO_FILE *));
 426 extern int _IO_default_uflow __P ((_IO_FILE *));
 427 extern wint_t _IO_wdefault_uflow __P ((_IO_FILE *));
 428 extern int _IO_default_doallocate __P ((_IO_FILE *));
 429 extern int _IO_wdefault_doallocate __P ((_IO_FILE *));
 430 extern void _IO_default_finish __P ((_IO_FILE *, int));
 431 extern void _IO_wdefault_finish __P ((_IO_FILE *, int));
 432 extern int _IO_default_pbackfail __P ((_IO_FILE *, int));
 433 extern wint_t _IO_wdefault_pbackfail __P ((_IO_FILE *, wint_t));
 434 extern _IO_FILE* _IO_default_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t));
 435 extern _IO_size_t _IO_default_xsputn __P ((_IO_FILE *, const void *,
 436                                            _IO_size_t));
 437 extern _IO_size_t _IO_wdefault_xsputn __P ((_IO_FILE *, const void *,
 438                                             _IO_size_t));
 439 extern _IO_size_t _IO_default_xsgetn __P ((_IO_FILE *, void *, _IO_size_t));
 440 extern _IO_size_t _IO_wdefault_xsgetn __P ((_IO_FILE *, void *, _IO_size_t));
 441 extern _IO_off64_t _IO_default_seekoff __P ((_IO_FILE *,
 442                                              _IO_off64_t, int, int));
 443 extern _IO_off64_t _IO_default_seekpos __P ((_IO_FILE *, _IO_off64_t, int));
 444 extern _IO_ssize_t _IO_default_write __P ((_IO_FILE *, const void *,
 445                                            _IO_ssize_t));
 446 extern _IO_ssize_t _IO_default_read __P ((_IO_FILE *, void *, _IO_ssize_t));
 447 extern int _IO_default_stat __P ((_IO_FILE *, void *));
 448 extern _IO_off64_t _IO_default_seek __P ((_IO_FILE *, _IO_off64_t, int));
 449 extern int _IO_default_sync __P ((_IO_FILE *));
 450 #define _IO_default_close ((_IO_close_t) _IO_default_sync)
 451 extern int _IO_default_showmanyc __P ((_IO_FILE *));
 452 extern void _IO_default_imbue __P ((_IO_FILE *, void *));
 453
 454 extern struct _IO_jump_t _IO_file_jumps;
 455 libc_hidden_proto (_IO_file_jumps)
 456 extern struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden;
 457 extern struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden;
 458 extern struct _IO_jump_t _IO_wfile_jumps;
 459 libc_hidden_proto (_IO_wfile_jumps)
 460 extern struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden;
 461 extern struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden;
 462 extern struct _IO_jump_t _IO_old_file_jumps attribute_hidden;
 463 extern struct _IO_jump_t _IO_streambuf_jumps;
 464 extern struct _IO_jump_t _IO_old_proc_jumps attribute_hidden;
 465 extern struct _IO_jump_t _IO_str_jumps attribute_hidden;
 466 extern struct _IO_jump_t _IO_wstr_jumps attribute_hidden;
 467 extern struct _IO_codecvt __libio_codecvt attribute_hidden;
 468 extern int _IO_do_write __P ((_IO_FILE *, const char *, _IO_size_t));
 469 extern int _IO_new_do_write __P ((_IO_FILE *, const char *, _IO_size_t));
 470 extern int _IO_old_do_write __P ((_IO_FILE *, const char *, _IO_size_t));
 471 extern int _IO_wdo_write __P ((_IO_FILE *, const wchar_t *, _IO_size_t));
 472 extern int _IO_flush_all_lockp __P ((int));
 473 extern int _IO_flush_all __P ((void));
 474 extern int _IO_cleanup __P ((void));
 475 extern void _IO_flush_all_linebuffered __P ((void));
 476 extern int _IO_new_fgetpos __P ((_IO_FILE *, _IO_fpos_t *));
 477 extern int _IO_old_fgetpos __P ((_IO_FILE *, _IO_fpos_t *));
 478 extern int _IO_new_fsetpos __P ((_IO_FILE *, const _IO_fpos_t *));
 479 extern int _IO_old_fsetpos __P ((_IO_FILE *, const _IO_fpos_t *));
 480 extern int _IO_new_fgetpos64 __P ((_IO_FILE *, _IO_fpos64_t *));
 481 extern int _IO_old_fgetpos64 __P ((_IO_FILE *, _IO_fpos64_t *));
 482 extern int _IO_new_fsetpos64 __P ((_IO_FILE *, const _IO_fpos64_t *));
 483 extern int _IO_old_fsetpos64 __P ((_IO_FILE *, const _IO_fpos64_t *));
 484 extern void _IO_old_init __P ((_IO_FILE *fp, int flags));
 485
 486
 487 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 488 # define _IO_do_flush(_f) \
 489   ((_f)->_mode <= 0                                                           \
 490    ? INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                           \
 491                           (_f)->_IO_write_ptr-(_f)->_IO_write_base)           \
 492    : INTUSE(_IO_wdo_write)(_f, (_f)->_wide_data->_IO_write_base,              \
 493                            ((_f)->_wide_data->_IO_write_ptr                   \
 494                             - (_f)->_wide_data->_IO_write_base)))
 495 #else
 496 # define _IO_do_flush(_f) \
 497    INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                             \
 498                         (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 499 #endif
 500 #define _IO_old_do_flush(_f) \
 501   _IO_old_do_write(_f, (_f)->_IO_write_base, \
 502                    (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 503 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
 504 #define _IO_mask_flags(fp, f, mask) \
 505        ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
 506 #define _IO_setg(fp, eb, g, eg)  ((fp)->_IO_read_base = (eb),\
 507         (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
 508 #define _IO_wsetg(fp, eb, g, eg)  ((fp)->_wide_data->_IO_read_base = (eb),\
 509         (fp)->_wide_data->_IO_read_ptr = (g), \
 510         (fp)->_wide_data->_IO_read_end = (eg))
 511 #define _IO_setp(__fp, __p, __ep) \
 512        ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \
 513         = __p, (__fp)->_IO_write_end = (__ep))
 514 #define _IO_wsetp(__fp, __p, __ep) \
 515        ((__fp)->_wide_data->_IO_write_base \
 516         = (__fp)->_wide_data->_IO_write_ptr = __p, \
 517         (__fp)->_wide_data->_IO_write_end = (__ep))
 518 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
 519 #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL)
 520 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
 521 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
 522 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
 523 #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \
 524                        - (fp)->_wide_data->_IO_buf_base)
 525
 526 /* Jumptable functions for files. */
 527
 528 extern int _IO_file_doallocate __P ((_IO_FILE *));
 529 extern _IO_FILE* _IO_file_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t));
 530 extern _IO_off64_t _IO_file_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 531 extern _IO_off64_t _IO_file_seekoff_mmap __P ((_IO_FILE *, _IO_off64_t, int,
 532                                                int));
 533 extern _IO_size_t _IO_file_xsputn __P ((_IO_FILE *, const void *, _IO_size_t));
 534 extern _IO_size_t _IO_file_xsgetn __P ((_IO_FILE *, void *, _IO_size_t));
 535 extern int _IO_file_stat __P ((_IO_FILE *, void *));
 536 extern int _IO_file_close __P ((_IO_FILE *));
 537 extern int _IO_file_close_mmap __P ((_IO_FILE *));
 538 extern int _IO_file_underflow __P ((_IO_FILE *));
 539 extern int _IO_file_underflow_mmap __P ((_IO_FILE *));
 540 extern int _IO_file_underflow_maybe_mmap __P ((_IO_FILE *));
 541 extern int _IO_file_overflow __P ((_IO_FILE *, int));
 542 #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1)
 543 extern void _IO_file_init __P ((struct _IO_FILE_plus *));
 544 extern _IO_FILE* _IO_file_attach __P ((_IO_FILE *, int));
 545 extern _IO_FILE* _IO_file_open __P ((_IO_FILE *, const char *, int, int,
 546                                      int, int));
 547 libc_hidden_proto (_IO_file_open)
 548 extern _IO_FILE* _IO_file_fopen __P ((_IO_FILE *, const char *, const char *,
 549                                       int));
 550 extern _IO_ssize_t _IO_file_write __P ((_IO_FILE *, const void *,
 551                                         _IO_ssize_t));
 552 extern _IO_ssize_t _IO_file_read __P ((_IO_FILE *, void *, _IO_ssize_t));
 553 extern int _IO_file_sync __P ((_IO_FILE *));
 554 extern int _IO_file_close_it __P ((_IO_FILE *));
 555 extern _IO_off64_t _IO_file_seek __P ((_IO_FILE *, _IO_off64_t, int));
 556 extern void _IO_file_finish __P ((_IO_FILE *, int));
 557
 558 extern _IO_FILE* _IO_new_file_attach __P ((_IO_FILE *, int));
 559 extern int _IO_new_file_close_it __P ((_IO_FILE *));
 560 extern void _IO_new_file_finish __P ((_IO_FILE *, int));
 561 extern _IO_FILE* _IO_new_file_fopen __P ((_IO_FILE *, const char *, const char *,
 562                                           int));
 563 extern void _IO_no_init __P ((_IO_FILE *, int, int, struct _IO_wide_data *,
 564                               struct _IO_jump_t *));
 565 extern void _IO_new_file_init __P ((struct _IO_FILE_plus *));
 566 extern _IO_FILE* _IO_new_file_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t));
 567 extern _IO_FILE* _IO_file_setbuf_mmap __P ((_IO_FILE *, char *, _IO_ssize_t));
 568 extern int _IO_new_file_sync __P ((_IO_FILE *));
 569 extern int _IO_new_file_underflow __P ((_IO_FILE *));
 570 extern int _IO_new_file_overflow __P ((_IO_FILE *, int));
 571 extern _IO_off64_t _IO_new_file_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 572 extern _IO_ssize_t _IO_new_file_write __P ((_IO_FILE *, const void *,
 573                                             _IO_ssize_t));
 574 extern _IO_size_t _IO_new_file_xsputn __P ((_IO_FILE *, const void *, _IO_size_t));
 575
 576 extern _IO_FILE* _IO_old_file_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t));
 577 extern _IO_off64_t _IO_old_file_seekoff __P ((_IO_FILE *, _IO_off64_t, int,
 578                                               int));
 579 extern _IO_size_t _IO_old_file_xsputn __P ((_IO_FILE *, const void *,
 580                                             _IO_size_t));
 581 extern int _IO_old_file_underflow __P ((_IO_FILE *));
 582 extern int _IO_old_file_overflow __P ((_IO_FILE *, int));
 583 extern void _IO_old_file_init __P ((struct _IO_FILE_plus *));
 584 extern _IO_FILE* _IO_old_file_attach __P ((_IO_FILE *, int));
 585 extern _IO_FILE* _IO_old_file_fopen __P ((_IO_FILE *, const char *,
 586                                           const char *));
 587 extern _IO_ssize_t _IO_old_file_write __P ((_IO_FILE *, const void *,
 588                                             _IO_ssize_t));
 589 extern int _IO_old_file_sync __P ((_IO_FILE *));
 590 extern int _IO_old_file_close_it __P ((_IO_FILE *));
 591 extern void _IO_old_file_finish __P ((_IO_FILE *, int));
 592
 593 extern int _IO_wfile_doallocate __P ((_IO_FILE *));
 594 extern _IO_size_t _IO_wfile_xsputn __P ((_IO_FILE *, const void *,
 595                                          _IO_size_t));
 596 extern _IO_FILE* _IO_wfile_setbuf __P ((_IO_FILE *, wchar_t *, _IO_ssize_t));
 597 extern wint_t _IO_wfile_sync __P ((_IO_FILE *));
 598 extern wint_t _IO_wfile_underflow __P ((_IO_FILE *));
 599 extern wint_t _IO_wfile_overflow __P ((_IO_FILE *, wint_t));
 600 extern _IO_off64_t _IO_wfile_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 601
 602 /* Jumptable functions for proc_files. */
 603 extern _IO_FILE* _IO_proc_open __P ((_IO_FILE *, const char *, const char *));
 604 extern _IO_FILE* _IO_new_proc_open __P ((_IO_FILE *, const char *, const char *));
 605 extern _IO_FILE* _IO_old_proc_open __P ((_IO_FILE *, const char *, const char *));
 606 extern int _IO_proc_close __P ((_IO_FILE *));
 607 extern int _IO_new_proc_close __P ((_IO_FILE *));
 608 extern int _IO_old_proc_close __P ((_IO_FILE *));
 609
 610 /* Jumptable functions for strfiles. */
 611 extern int _IO_str_underflow __P ((_IO_FILE *));
 612 extern int _IO_str_overflow __P ((_IO_FILE *, int));
 613 extern int _IO_str_pbackfail __P ((_IO_FILE *, int));
 614 extern _IO_off64_t _IO_str_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 615 extern void _IO_str_finish __P ((_IO_FILE *, int));
 616
 617 /* Other strfile functions */
 618 struct _IO_strfile_;
 619 extern void _IO_str_init_static __P ((struct _IO_strfile_ *, char *, int, char *));
 620 extern void _IO_str_init_readonly __P ((struct _IO_strfile_ *, const char *, int));
 621 extern _IO_ssize_t _IO_str_count __P ((_IO_FILE *));
 622
 623 /* And the wide character versions.  */
 624 extern void _IO_wstr_init_static __P ((_IO_FILE *, wchar_t *, _IO_size_t, wchar_t *));
 625 extern _IO_ssize_t _IO_wstr_count __P ((_IO_FILE *));
 626 extern _IO_wint_t _IO_wstr_overflow __P ((_IO_FILE *, _IO_wint_t));
 627 extern _IO_wint_t _IO_wstr_underflow __P ((_IO_FILE *));
 628 extern _IO_off64_t _IO_wstr_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 629 extern _IO_wint_t _IO_wstr_pbackfail __P ((_IO_FILE *, _IO_wint_t));
 630 extern void _IO_wstr_finish __P ((_IO_FILE *, int));
 631
 632 extern int _IO_vasprintf __P ((char **result_ptr, __const char *format,
 633                                _IO_va_list args));
 634 extern int _IO_vdprintf __P ((int d, __const char *format, _IO_va_list arg));
 635 extern int _IO_vsnprintf __P ((char *string, _IO_size_t maxlen,
 636                                __const char *format, _IO_va_list args));
 637
 638
 639 extern _IO_size_t _IO_getline __P ((_IO_FILE *,char *, _IO_size_t, int, int));
 640 extern _IO_size_t _IO_getline_info __P ((_IO_FILE *,char *, _IO_size_t,
 641                                          int, int, int *));
 642 extern _IO_ssize_t _IO_getdelim __P ((char **, _IO_size_t *, int, _IO_FILE *));
 643 extern _IO_size_t _IO_getwline __P ((_IO_FILE *,wchar_t *, _IO_size_t, wint_t,
 644                                      int));
 645 extern _IO_size_t _IO_getwline_info __P ((_IO_FILE *,wchar_t *, _IO_size_t,
 646                                           wint_t, int, wint_t *));
 647 extern double _IO_strtod __P ((const char *, char **));
 648 extern char *_IO_dtoa __P ((double __d, int __mode, int __ndigits,
 649                             int *__decpt, int *__sign, char **__rve));
 650 extern int _IO_outfloat __P ((double __value, _IO_FILE *__sb, int __type,
 651                               int __width, int __precision, int __flags,
 652                               int __sign_mode, int __fill));
 653
 654 extern struct _IO_FILE_plus *_IO_list_all;
 655 extern void (*_IO_cleanup_registration_needed) __PMT ((void));
 656
 657 /* Prototype for functions with alternative entry point.  */
 658 extern int _IO_flush_all_internal __P ((void));
 659 extern unsigned _IO_adjust_column_internal __P ((unsigned, const char *, int));
 660
 661 extern int _IO_default_uflow_internal __P ((_IO_FILE *));
 662 extern void _IO_default_finish_internal __P ((_IO_FILE *, int));
 663 extern int _IO_default_pbackfail_internal __P ((_IO_FILE *, int));
 664 extern _IO_size_t _IO_default_xsputn_internal __P ((_IO_FILE *, const void *,
 665                                                     _IO_size_t));
 666 extern _IO_size_t _IO_default_xsgetn_internal __P ((_IO_FILE *, void *,
 667                                                     _IO_size_t));
 668 extern int _IO_default_doallocate_internal __P ((_IO_FILE *));
 669 extern void _IO_wdefault_finish_internal __P ((_IO_FILE *, int));
 670 extern wint_t _IO_wdefault_pbackfail_internal __P ((_IO_FILE *, wint_t));
 671 extern _IO_size_t _IO_wdefault_xsputn_internal __P ((_IO_FILE *, const void *,
 672                                                      _IO_size_t));
 673 extern _IO_size_t _IO_wdefault_xsgetn_internal __P ((_IO_FILE *, void *,
 674                                                      _IO_size_t));
 675 extern int _IO_wdefault_doallocate_internal __P ((_IO_FILE *));
 676 extern wint_t _IO_wdefault_uflow_internal __P ((_IO_FILE *));
 677
 678 extern int _IO_file_doallocate_internal __P ((_IO_FILE *));
 679 extern _IO_FILE* _IO_file_setbuf_internal __P ((_IO_FILE *, char *,
 680                                                 _IO_ssize_t));
 681 extern _IO_off64_t _IO_file_seekoff_internal __P ((_IO_FILE *, _IO_off64_t,
 682                                                    int, int));
 683 extern _IO_size_t _IO_file_xsputn_internal __P ((_IO_FILE *, const void *,
 684                                                  _IO_size_t));
 685 extern _IO_size_t _IO_file_xsgetn_internal __P ((_IO_FILE *, void *,
 686                                                  _IO_size_t));
 687 extern int _IO_file_stat_internal __P ((_IO_FILE *, void *));
 688 extern int _IO_file_close_internal __P ((_IO_FILE *));
 689 extern int _IO_file_close_it_internal __P ((_IO_FILE *));
 690 extern int _IO_file_underflow_internal __P ((_IO_FILE *));
 691 extern int _IO_file_overflow_internal __P ((_IO_FILE *, int));
 692 extern void _IO_file_init_internal __P ((struct _IO_FILE_plus *));
 693 extern _IO_FILE* _IO_file_attach_internal __P ((_IO_FILE *, int));
 694 extern _IO_FILE* _IO_file_fopen_internal __P ((_IO_FILE *, const char *,
 695                                                const char *, int));
 696 extern _IO_ssize_t _IO_file_read_internal __P ((_IO_FILE *, void *,
 697                                                 _IO_ssize_t));
 698 extern int _IO_file_sync_internal __P ((_IO_FILE *));
 699 extern _IO_off64_t _IO_file_seek_internal __P ((_IO_FILE *, _IO_off64_t, int));
 700 extern void _IO_file_finish_internal __P ((_IO_FILE *, int));
 701
 702 extern _IO_size_t _IO_wfile_xsputn_internal __P ((_IO_FILE *, const void *,
 703                                                   _IO_size_t));
 704 extern _IO_off64_t _IO_wfile_seekoff_internal __P ((_IO_FILE *, _IO_off64_t,
 705                                                     int, int));
 706 extern wint_t _IO_wfile_sync_internal __P ((_IO_FILE *));
 707
 708 extern int _IO_str_underflow_internal __P ((_IO_FILE *));
 709 extern int _IO_str_overflow_internal __P ((_IO_FILE *, int));
 710 extern int _IO_str_pbackfail_internal __P ((_IO_FILE *, int));
 711 extern _IO_off64_t _IO_str_seekoff_internal __P ((_IO_FILE *, _IO_off64_t,
 712                                                   int, int));
 713 extern void _IO_str_init_static_internal __P ((struct _IO_strfile_ *, char *,
 714                                                _IO_size_t, char *));
 715
 716 extern struct _IO_jump_t _IO_file_jumps_internal attribute_hidden;
 717 extern struct _IO_jump_t _IO_wfile_jumps_internal attribute_hidden;
 718
 719 extern struct _IO_FILE_plus *_IO_list_all_internal attribute_hidden;
 720
 721 extern void _IO_link_in_internal __P ((struct _IO_FILE_plus *));
 722 extern int _IO_sputbackc_internal __P ((_IO_FILE *, int));
 723 extern void _IO_wdoallocbuf_internal __P ((_IO_FILE *));
 724
 725 extern _IO_size_t _IO_sgetn_internal (_IO_FILE *, void *, _IO_size_t);
 726 extern void _IO_flush_all_linebuffered_internal __P ((void));
 727 extern int _IO_switch_to_wget_mode_internal __P ((_IO_FILE *));
 728 extern void _IO_unsave_markers_internal __P ((_IO_FILE *));
 729 extern void _IO_switch_to_main_wget_area_internal __P ((_IO_FILE *));
 730 extern int _IO_wdo_write_internal __P ((_IO_FILE *, const wchar_t *,
 731                                         _IO_size_t));
 732 extern int _IO_do_write_internal __P ((_IO_FILE *, const char *, _IO_size_t));
 733 extern _IO_ssize_t _IO_padn_internal (_IO_FILE *, int, _IO_ssize_t);
 734 extern _IO_size_t _IO_getline_info_internal __P ((_IO_FILE *,char *,
 735                                                   _IO_size_t, int, int,
 736                                                   int *));
 737 extern _IO_size_t _IO_getline_internal __P ((_IO_FILE *, char *, _IO_size_t,
 738                                              int, int));
 739 extern void _IO_free_wbackup_area_internal (_IO_FILE *);
 740 extern void _IO_free_backup_area_internal (_IO_FILE *);
 741 extern void _IO_switch_to_wbackup_area_internal __P ((_IO_FILE *));
 742 extern void _IO_setb_internal __P ((_IO_FILE *, char *, char *, int));
 743 extern wint_t _IO_sputbackwc_internal __P ((_IO_FILE *, wint_t));
 744 extern int _IO_switch_to_get_mode_internal __P ((_IO_FILE *));
 745 extern int _IO_vfscanf_internal (_IO_FILE * __restrict,
 746                                  const char * __restrict,
 747                                  _IO_va_list, int *__restrict);
 748 extern int _IO_vfprintf_internal (_IO_FILE *__restrict, const char *__restrict,
 749                                   _IO_va_list);
 750 extern void _IO_doallocbuf_internal __P ((_IO_FILE *));
 751 extern void _IO_wsetb_internal __P ((_IO_FILE *, wchar_t *, wchar_t *, int));
 752 extern _IO_off64_t _IO_seekoff_unlocked (_IO_FILE *, _IO_off64_t, int, int)
 753      attribute_hidden;
 754 extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int)
 755      attribute_hidden;
 756 extern int _IO_putc_internal (int __c, _IO_FILE *__fp);
 757 extern void _IO_init_internal __P ((_IO_FILE *, int));
 758 extern void _IO_un_link_internal __P ((struct _IO_FILE_plus *));
 759
 760 #ifndef EOF
 761 # define EOF (-1)
 762 #endif
 763 #ifndef NULL
 764 # if defined __GNUG__ && \
 765     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
 766 #  define NULL (__null)
 767 # else
 768 #  if !defined(__cplusplus)
 769 #   define NULL ((void*)0)
 770 #  else
 771 #   define NULL (0)
 772 #  endif
 773 # endif
 774 #endif
 775
 776 #if _G_HAVE_MMAP
 777
 778 # include <unistd.h>
 779 # include <fcntl.h>
 780 # include <sys/mman.h>
 781 # include <sys/param.h>
 782
 783 # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
 784 #  define MAP_ANONYMOUS MAP_ANON
 785 # endif
 786
 787 # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
 788 #  undef _G_HAVE_MMAP
 789 #  define _G_HAVE_MMAP 0
 790 # endif
 791
 792 #endif /* _G_HAVE_MMAP */
 793
 794 #if _G_HAVE_MMAP
 795
 796 # ifdef _LIBC
 797 /* When using this code in the GNU libc we must not pollute the name space.  */
 798 #  define mmap __mmap
 799 #  define munmap __munmap
 800 #  define ftruncate __ftruncate
 801 # endif
 802
 803 # define ROUND_TO_PAGE(_S) \
 804        (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
 805
 806 # define FREE_BUF(_B, _S) \
 807        munmap ((_B), ROUND_TO_PAGE (_S))
 808 # define ALLOC_BUF(_B, _S, _R) \
 809        do {                                                                   \
 810           (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S),                        \
 811                                 PROT_READ | PROT_WRITE,                       \
 812                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);          \
 813           if ((_B) == (char *) MAP_FAILED)                                    \
 814             return (_R);                                                      \
 815        } while (0)
 816 # define ALLOC_WBUF(_B, _S, _R) \
 817        do {                                                                   \
 818           (_B) = (wchar_t *) mmap (0, ROUND_TO_PAGE (_S),                     \
 819                                    PROT_READ | PROT_WRITE,                    \
 820                                    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);       \
 821           if ((_B) == (wchar_t *) MAP_FAILED)                                 \
 822             return (_R);                                                      \
 823        } while (0)
 824
 825 #else /* _G_HAVE_MMAP */
 826
 827 # define FREE_BUF(_B, _S) \
 828        free(_B)
 829 # define ALLOC_BUF(_B, _S, _R) \
 830        do {                                                                   \
 831           (_B) = (char*)malloc(_S);                                           \
 832           if ((_B) == NULL)                                                   \
 833             return (_R);                                                      \
 834        } while (0)
 835 # define ALLOC_WBUF(_B, _S, _R) \
 836        do {                                                                   \
 837           (_B) = (wchar_t *)malloc(_S);                                       \
 838           if ((_B) == NULL)                                                   \
 839             return (_R);                                                      \
 840        } while (0)
 841
 842 #endif /* _G_HAVE_MMAP */
 843
 844 #ifndef OS_FSTAT
 845 # define OS_FSTAT fstat
 846 #endif
 847 struct stat;
 848 extern _IO_ssize_t _IO_read __P ((int, void *, _IO_size_t));
 849 extern _IO_ssize_t _IO_write __P ((int, const void *, _IO_size_t));
 850 extern _IO_off64_t _IO_lseek __P ((int, _IO_off64_t, int));
 851 extern int _IO_close __P ((int));
 852 extern int _IO_fstat __P ((int, struct stat *));
 853 extern int _IO_vscanf __P ((const char *, _IO_va_list));
 854
 855 /* _IO_pos_BAD is an _IO_off64_t value indicating error, unknown, or EOF. */
 856 #ifndef _IO_pos_BAD
 857 # define _IO_pos_BAD ((_IO_off64_t) -1)
 858 #endif
 859 /* _IO_pos_adjust adjust an _IO_off64_t by some number of bytes. */
 860 #ifndef _IO_pos_adjust
 861 # define _IO_pos_adjust(pos, delta) ((pos) += (delta))
 862 #endif
 863 /* _IO_pos_0 is an _IO_off64_t value indicating beginning of file. */
 864 #ifndef _IO_pos_0
 865 # define _IO_pos_0 ((_IO_off64_t) 0)
 866 #endif
 867
 868 #ifdef __cplusplus
 869 }
 870 #endif
 871
 872 #ifdef _IO_MTSAFE_IO
 873 /* check following! */
 874 # ifdef _IO_USE_OLD_IO_FILE
 875 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 876        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 877          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 878          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
 879 # else
 880 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 881 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 882        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 883          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 884          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
 885          NULL, WDP, 0 }
 886 #  else
 887 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 888        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 889          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 890          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
 891          0 }
 892 #  endif
 893 # endif
 894 #else
 895 # ifdef _IO_USE_OLD_IO_FILE
 896 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 897        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 898          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 899          0, _IO_pos_BAD }
 900 # else
 901 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 902 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 903        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 904          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 905          0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 906          NULL, WDP, 0 }
 907 #  else
 908 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 909        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 910          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 911          0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 912          0 }
 913 #  endif
 914 # endif
 915 #endif
 916
 917 /* VTABLE_LABEL defines NAME as of the CLASS class.
 918    CNLENGTH is strlen(#CLASS).  */
 919 #ifdef __GNUC__
 920 # if _G_VTABLE_LABEL_HAS_LENGTH
 921 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 922   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
 923 # else
 924 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 925   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
 926 # endif
 927 #endif /* __GNUC__ */
 928
 929 #if !defined(builtinbuf_vtable) && defined(__cplusplus)
 930 # ifdef __GNUC__
 931 VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10)
 932 # else
 933 #  if _G_VTABLE_LABEL_HAS_LENGTH
 934 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
 935 #  else
 936 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
 937 #  endif
 938 # endif
 939 #endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
 940
 941 #if defined(__STDC__) || defined(__cplusplus)
 942 # define _IO_va_start(args, last) va_start(args, last)
 943 #else
 944 # define _IO_va_start(args, last) va_start(args)
 945 #endif
 946
 947 extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
 948
 949 #if 1
 950 # define COERCE_FILE(FILE) /* Nothing */
 951 #else
 952 /* This is part of the kludge for binary compatibility with old stdio. */
 953 # define COERCE_FILE(FILE) \
 954   (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
 955     && (FILE) = *(FILE**)&((int*)fp)[1])
 956 #endif
 957
 958 #ifdef EINVAL
 959 # define MAYBE_SET_EINVAL __set_errno (EINVAL)
 960 #else
 961 # define MAYBE_SET_EINVAL /* nothing */
 962 #endif
 963
 964 #ifdef IO_DEBUG
 965 # define CHECK_FILE(FILE, RET) \
 966         if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
 967         else { COERCE_FILE(FILE); \
 968                if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
 969           { MAYBE_SET_EINVAL; return RET; }}
 970 #else
 971 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)
 972 #endif
 973
 974 static inline void
 975 __attribute__ ((__always_inline__))
 976 _IO_acquire_lock_fct (_IO_FILE **p)
 977 {
 978   _IO_FILE *fp = *p;
 979   if ((fp->_flags & _IO_USER_LOCK) == 0)
 980     _IO_funlockfile (fp);
 981 }