libio/libioP.h

   1 /* Copyright (C) 1993, 1997-2003,2004,2005,2006
   2         Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.
  19
  20    As a special exception, if you link the code in this file with
  21    files compiled with a GNU compiler to produce an executable,
  22    that does not cause the resulting executable to be covered by
  23    the GNU Lesser General Public License.  This exception does not
  24    however invalidate any other reasons why the executable file
  25    might be covered by the GNU Lesser General Public License.
  26    This exception applies to code released by its copyright holders
  27    in files containing the exception.  */
  28
  29 #include <errno.h>
  30 #ifndef __set_errno
  31 # define __set_errno(Val) errno = (Val)
  32 #endif
  33 #if defined __GLIBC__ && __GLIBC__ >= 2
  34 # include <bits/libc-lock.h>
  35 #else
  36 /*# include <comthread.h>*/
  37 #endif
  38
  39 #include <math_ldbl_opt.h>
  40
  41 #include "iolibio.h"
  42
  43 /* Control of exported symbols.  Used in glibc.  By default we don't
  44    do anything.  */
  45 #ifndef INTUSE
  46 # define INTUSE(name) name
  47 #endif
  48 #ifndef INTDEF
  49 # define INTDEF(name)
  50 #endif
  51 #ifndef INTDEF2
  52 # define INTDEF2(name)
  53 #endif
  54 #ifndef libc_hidden_proto
  55 # define libc_hidden_proto(name)
  56 #endif
  57 #ifndef libc_hidden_def
  58 # define libc_hidden_def(name)
  59 #endif
  60 #ifndef libc_hidden_weak
  61 # define libc_hidden_weak(name)
  62 #endif
  63
  64 #ifdef __cplusplus
  65 extern "C" {
  66 #endif
  67
  68 #define _IO_seek_set 0
  69 #define _IO_seek_cur 1
  70 #define _IO_seek_end 2
  71
  72 /* THE JUMPTABLE FUNCTIONS.
  73
  74  * The _IO_FILE type is used to implement the FILE type in GNU libc,
  75  * as well as the streambuf class in GNU iostreams for C++.
  76  * These are all the same, just used differently.
  77  * An _IO_FILE (or FILE) object is allows followed by a pointer to
  78  * a jump table (of pointers to functions).  The pointer is accessed
  79  * with the _IO_JUMPS macro.  The jump table has a eccentric format,
  80  * so as to be compatible with the layout of a C++ virtual function table.
  81  * (as implemented by g++).  When a pointer to a streambuf object is
  82  * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
  83  * happens to point to the virtual function table of the streambuf.
  84  * Thus the _IO_JUMPS function table used for C stdio/libio does
  85  * double duty as the virtual function table for C++ streambuf.
  86  *
  87  * The entries in the _IO_JUMPS function table (and hence also the
  88  * virtual functions of a streambuf) are described below.
  89  * The first parameter of each function entry is the _IO_FILE/streambuf
  90  * object being acted on (i.e. the 'this' parameter).
  91  */
  92
  93 #ifdef _LIBC
  94 # include <shlib-compat.h>
  95 # if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
  96    /* Setting this macro disables the use of the _vtable_offset
  97       bias in _IO_JUMPS_FUNCS, below.  That is only needed if we
  98       want to support old binaries (see oldfileops.c).  */
  99 #  define _G_IO_NO_BACKWARD_COMPAT 1
 100 # endif
 101 #endif
 102
 103 #if (!defined _IO_USE_OLD_IO_FILE \
 104      && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
 105 # define _IO_JUMPS_OFFSET 1
 106 #endif
 107
 108 #define _IO_JUMPS(THIS) (THIS)->vtable
 109 #define _IO_WIDE_JUMPS(THIS) ((struct _IO_FILE *) (THIS))->_wide_data->_wide_vtable
 110 #define _IO_CHECK_WIDE(THIS) (((struct _IO_FILE *) (THIS))->_wide_data != NULL)
 111
 112 #if _IO_JUMPS_OFFSET
 113 # define _IO_JUMPS_FUNC(THIS) \
 114  (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS ((struct _IO_FILE_plus *) (THIS)) \
 115                            + (THIS)->_vtable_offset))
 116 # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset
 117 #else
 118 # define _IO_JUMPS_FUNC(THIS) _IO_JUMPS ((struct _IO_FILE_plus *) (THIS))
 119 # define _IO_vtable_offset(THIS) 0
 120 #endif
 121 #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS)
 122 #ifdef _G_USING_THUNKS
 123 # define JUMP_FIELD(TYPE, NAME) TYPE NAME
 124 # define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS)
 125 # define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 126 # define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 127 # define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 128 # define JUMP_INIT(NAME, VALUE) VALUE
 129 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
 130
 131 # define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS)
 132 # define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 133 # define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 134 # define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 135 #else
 136 /* These macros will change when we re-implement vtables to use "thunks"! */
 137 # define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
 138 # define JUMP0(FUNC, THIS) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 139 # define JUMP1(FUNC, THIS, X1) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 140 # define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 141 # define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 142 # define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
 143 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
 144
 145 # define WJUMP0(FUNC, THIS) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 146 # define WJUMP1(FUNC, THIS, X1) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 147 # define WJUMP2(FUNC, THIS, X1, X2) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 148 # define WJUMP3(FUNC, THIS, X1,X2,X3) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 149 #endif
 150
 151 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
 152    It does not delete (free) it, but does everything else to finalize it.
 153    It matches the streambuf::~streambuf virtual destructor.  */
 154 typedef void (*_IO_finish_t) (_IO_FILE *, int); /* finalize */
 155 #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
 156 #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0)
 157
 158 /* The 'overflow' hook flushes the buffer.
 159    The second argument is a character, or EOF.
 160    It matches the streambuf::overflow virtual function. */
 161 typedef int (*_IO_overflow_t) (_IO_FILE *, int);
 162 #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
 163 #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH)
 164
 165 /* The 'underflow' hook tries to fills the get buffer.
 166    It returns the next character (as an unsigned char) or EOF.  The next
 167    character remains in the get buffer, and the get position is not changed.
 168    It matches the streambuf::underflow virtual function. */
 169 typedef int (*_IO_underflow_t) (_IO_FILE *);
 170 #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
 171 #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP)
 172
 173 /* The 'uflow' hook returns the next character in the input stream
 174    (cast to unsigned char), and increments the read position;
 175    EOF is returned on failure.
 176    It matches the streambuf::uflow virtual function, which is not in the
 177    cfront implementation, but was added to C++ by the ANSI/ISO committee. */
 178 #define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
 179 #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP)
 180
 181 /* The 'pbackfail' hook handles backing up.
 182    It matches the streambuf::pbackfail virtual function. */
 183 typedef int (*_IO_pbackfail_t) (_IO_FILE *, int);
 184 #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
 185 #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH)
 186
 187 /* The 'xsputn' hook writes upto N characters from buffer DATA.
 188    Returns the number of character actually written.
 189    It matches the streambuf::xsputn virtual function. */
 190 typedef _IO_size_t (*_IO_xsputn_t) (_IO_FILE *FP, const void *DATA,
 191                                     _IO_size_t N);
 192 #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
 193 #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N)
 194
 195 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
 196    Returns the number of character actually read.
 197    It matches the streambuf::xsgetn virtual function. */
 198 typedef _IO_size_t (*_IO_xsgetn_t) (_IO_FILE *FP, void *DATA, _IO_size_t N);
 199 #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
 200 #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N)
 201
 202 /* The 'seekoff' hook moves the stream position to a new position
 203    relative to the start of the file (if DIR==0), the current position
 204    (MODE==1), or the end of the file (MODE==2).
 205    It matches the streambuf::seekoff virtual function.
 206    It is also used for the ANSI fseek function. */
 207 typedef _IO_off64_t (*_IO_seekoff_t) (_IO_FILE *FP, _IO_off64_t OFF, int DIR,
 208                                       int MODE);
 209 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
 210 #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
 211
 212 /* The 'seekpos' hook also moves the stream position,
 213    but to an absolute position given by a fpos64_t (seekpos).
 214    It matches the streambuf::seekpos virtual function.
 215    It is also used for the ANSI fgetpos and fsetpos functions.  */
 216 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
 217 typedef _IO_off64_t (*_IO_seekpos_t) (_IO_FILE *, _IO_off64_t, int);
 218 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
 219 #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS)
 220
 221 /* The 'setbuf' hook gives a buffer to the file.
 222    It matches the streambuf::setbuf virtual function. */
 223 typedef _IO_FILE* (*_IO_setbuf_t) (_IO_FILE *, char *, _IO_ssize_t);
 224 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
 225 #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH)
 226
 227 /* The 'sync' hook attempts to synchronize the internal data structures
 228    of the file with the external state.
 229    It matches the streambuf::sync virtual function. */
 230 typedef int (*_IO_sync_t) (_IO_FILE *);
 231 #define _IO_SYNC(FP) JUMP0 (__sync, FP)
 232 #define _IO_WSYNC(FP) WJUMP0 (__sync, FP)
 233
 234 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
 235    It matches the streambuf::doallocate virtual function, which is not
 236    in the ANSI/ISO C++ standard, but is part traditional implementations. */
 237 typedef int (*_IO_doallocate_t) (_IO_FILE *);
 238 #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
 239 #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP)
 240
 241 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
 242    sysstat) are low-level hooks specific to this implementation.
 243    There is no correspondence in the ANSI/ISO C++ standard library.
 244    The hooks basically correspond to the Unix system functions
 245    (read, write, close, lseek, and stat) except that a _IO_FILE*
 246    parameter is used instead of a integer file descriptor;  the default
 247    implementation used for normal files just calls those functions.
 248    The advantage of overriding these functions instead of the higher-level
 249    ones (underflow, overflow etc) is that you can leave all the buffering
 250    higher-level functions.  */
 251
 252 /* The 'sysread' hook is used to read data from the external file into
 253    an existing buffer.  It generalizes the Unix read(2) function.
 254    It matches the streambuf::sys_read virtual function, which is
 255    specific to this implementation. */
 256 typedef _IO_ssize_t (*_IO_read_t) (_IO_FILE *, void *, _IO_ssize_t);
 257 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
 258 #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN)
 259
 260 /* The 'syswrite' hook is used to write data from an existing buffer
 261    to an external file.  It generalizes the Unix write(2) function.
 262    It matches the streambuf::sys_write virtual function, which is
 263    specific to this implementation. */
 264 typedef _IO_ssize_t (*_IO_write_t) (_IO_FILE *, const void *, _IO_ssize_t);
 265 #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN)
 266 #define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN)
 267
 268 /* The 'sysseek' hook is used to re-position an external file.
 269    It generalizes the Unix lseek(2) function.
 270    It matches the streambuf::sys_seek virtual function, which is
 271    specific to this implementation. */
 272 typedef _IO_off64_t (*_IO_seek_t) (_IO_FILE *, _IO_off64_t, int);
 273 #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE)
 274 #define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE)
 275
 276 /* The 'sysclose' hook is used to finalize (close, finish up) an
 277    external file.  It generalizes the Unix close(2) function.
 278    It matches the streambuf::sys_close virtual function, which is
 279    specific to this implementation. */
 280 typedef int (*_IO_close_t) (_IO_FILE *); /* finalize */
 281 #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP)
 282 #define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP)
 283
 284 /* The 'sysstat' hook is used to get information about an external file
 285    into a struct stat buffer.  It generalizes the Unix fstat(2) call.
 286    It matches the streambuf::sys_stat virtual function, which is
 287    specific to this implementation. */
 288 typedef int (*_IO_stat_t) (_IO_FILE *, void *);
 289 #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF)
 290 #define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF)
 291
 292 /* The 'showmany' hook can be used to get an image how much input is
 293    available.  In many cases the answer will be 0 which means unknown
 294    but some cases one can provide real information.  */
 295 typedef int (*_IO_showmanyc_t) (_IO_FILE *);
 296 #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP)
 297 #define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP)
 298
 299 /* The 'imbue' hook is used to get information about the currently
 300    installed locales.  */
 301 typedef void (*_IO_imbue_t) (_IO_FILE *, void *);
 302 #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE)
 303 #define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE)
 304
 305
 306 #define _IO_CHAR_TYPE char /* unsigned char ? */
 307 #define _IO_INT_TYPE int
 308
 309 struct _IO_jump_t
 310 {
 311     JUMP_FIELD(_G_size_t, __dummy);
 312 #ifdef _G_USING_THUNKS
 313     JUMP_FIELD(_G_size_t, __dummy2);
 314 #endif
 315     JUMP_FIELD(_IO_finish_t, __finish);
 316     JUMP_FIELD(_IO_overflow_t, __overflow);
 317     JUMP_FIELD(_IO_underflow_t, __underflow);
 318     JUMP_FIELD(_IO_underflow_t, __uflow);
 319     JUMP_FIELD(_IO_pbackfail_t, __pbackfail);
 320     /* showmany */
 321     JUMP_FIELD(_IO_xsputn_t, __xsputn);
 322     JUMP_FIELD(_IO_xsgetn_t, __xsgetn);
 323     JUMP_FIELD(_IO_seekoff_t, __seekoff);
 324     JUMP_FIELD(_IO_seekpos_t, __seekpos);
 325     JUMP_FIELD(_IO_setbuf_t, __setbuf);
 326     JUMP_FIELD(_IO_sync_t, __sync);
 327     JUMP_FIELD(_IO_doallocate_t, __doallocate);
 328     JUMP_FIELD(_IO_read_t, __read);
 329     JUMP_FIELD(_IO_write_t, __write);
 330     JUMP_FIELD(_IO_seek_t, __seek);
 331     JUMP_FIELD(_IO_close_t, __close);
 332     JUMP_FIELD(_IO_stat_t, __stat);
 333     JUMP_FIELD(_IO_showmanyc_t, __showmanyc);
 334     JUMP_FIELD(_IO_imbue_t, __imbue);
 335 #if 0
 336     get_column;
 337     set_column;
 338 #endif
 339 };
 340
 341 /* We always allocate an extra word following an _IO_FILE.
 342    This contains a pointer to the function jump table used.
 343    This is for compatibility with C++ streambuf; the word can
 344    be used to smash to a pointer to a virtual function table. */
 345
 346 struct _IO_FILE_plus
 347 {
 348   _IO_FILE file;
 349   const struct _IO_jump_t *vtable;
 350 };
 351
 352 #ifdef _IO_USE_OLD_IO_FILE
 353 /* This structure is used by the compatibility code as if it were an
 354    _IO_FILE_plus, but has enough space to initialize the _mode argument
 355    of an _IO_FILE_complete.  */
 356 struct _IO_FILE_complete_plus
 357 {
 358   struct _IO_FILE_complete file;
 359   const struct _IO_jump_t *vtable;
 360 };
 361 #endif
 362
 363 /* Special file type for fopencookie function.  */
 364 struct _IO_cookie_file
 365 {
 366   struct _IO_FILE_plus __fp;
 367   void *__cookie;
 368   _IO_cookie_io_functions_t __io_functions;
 369 };
 370
 371 _IO_FILE *_IO_fopencookie (void *cookie, const char *mode,
 372                            _IO_cookie_io_functions_t io_functions);
 373
 374
 375 /* Iterator type for walking global linked list of _IO_FILE objects. */
 376
 377 typedef struct _IO_FILE *_IO_ITER;
 378
 379 /* Generic functions */
 380
 381 extern void _IO_switch_to_main_get_area (_IO_FILE *) __THROW;
 382 extern void _IO_switch_to_backup_area (_IO_FILE *) __THROW;
 383 extern int _IO_switch_to_get_mode (_IO_FILE *) __THROW;
 384 extern void _IO_init (_IO_FILE *, int) __THROW;
 385 extern int _IO_sputbackc (_IO_FILE *, int) __THROW;
 386 extern int _IO_sungetc (_IO_FILE *) __THROW;
 387 extern void _IO_un_link (struct _IO_FILE_plus *) __THROW;
 388 extern void _IO_link_in (struct _IO_FILE_plus *) __THROW;
 389 extern void _IO_doallocbuf (_IO_FILE *) __THROW;
 390 extern void _IO_unsave_markers (_IO_FILE *) __THROW;
 391 extern void _IO_setb (_IO_FILE *, char *, char *, int) __THROW;
 392 extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW;
 393 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
 394
 395 extern void _IO_switch_to_main_wget_area (_IO_FILE *) __THROW;
 396 extern void _IO_switch_to_wbackup_area (_IO_FILE *) __THROW;
 397 extern int _IO_switch_to_wget_mode (_IO_FILE *) __THROW;
 398 extern void _IO_wsetb (_IO_FILE *, wchar_t *, wchar_t *, int) __THROW;
 399 extern wint_t _IO_sputbackwc (_IO_FILE *, wint_t) __THROW;
 400 extern wint_t _IO_sungetwc (_IO_FILE *) __THROW;
 401 extern void _IO_wdoallocbuf (_IO_FILE *) __THROW;
 402 extern void _IO_unsave_wmarkers (_IO_FILE *) __THROW;
 403 extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW;
 404
 405 /* Marker-related function. */
 406
 407 extern void _IO_init_marker (struct _IO_marker *, _IO_FILE *) __THROW;
 408 extern void _IO_init_wmarker (struct _IO_marker *, _IO_FILE *) __THROW;
 409 extern void _IO_remove_marker (struct _IO_marker *) __THROW;
 410 extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *)
 411      __THROW;
 412 extern int _IO_marker_delta (struct _IO_marker *) __THROW;
 413 extern int _IO_wmarker_delta (struct _IO_marker *) __THROW;
 414 extern int _IO_seekmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
 415 extern int _IO_seekwmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
 416
 417 /* Functions for iterating global list and dealing with its lock */
 418
 419 extern _IO_ITER _IO_iter_begin (void) __THROW;
 420 libc_hidden_proto (_IO_iter_begin)
 421 extern _IO_ITER _IO_iter_end (void) __THROW;
 422 libc_hidden_proto (_IO_iter_end)
 423 extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW;
 424 libc_hidden_proto (_IO_iter_next)
 425 extern _IO_FILE *_IO_iter_file (_IO_ITER) __THROW;
 426 libc_hidden_proto (_IO_iter_file)
 427 extern void _IO_list_lock (void) __THROW;
 428 libc_hidden_proto (_IO_list_lock)
 429 extern void _IO_list_unlock (void) __THROW;
 430 libc_hidden_proto (_IO_list_unlock)
 431 extern void _IO_list_resetlock (void) __THROW;
 432 libc_hidden_proto (_IO_list_resetlock)
 433
 434 /* Default jumptable functions. */
 435
 436 extern int _IO_default_underflow (_IO_FILE *) __THROW;
 437 extern int _IO_default_uflow (_IO_FILE *) __THROW;
 438 extern wint_t _IO_wdefault_uflow (_IO_FILE *) __THROW;
 439 extern int _IO_default_doallocate (_IO_FILE *) __THROW;
 440 extern int _IO_wdefault_doallocate (_IO_FILE *) __THROW;
 441 extern void _IO_default_finish (_IO_FILE *, int) __THROW;
 442 extern void _IO_wdefault_finish (_IO_FILE *, int) __THROW;
 443 extern int _IO_default_pbackfail (_IO_FILE *, int) __THROW;
 444 extern wint_t _IO_wdefault_pbackfail (_IO_FILE *, wint_t) __THROW;
 445 extern _IO_FILE* _IO_default_setbuf (_IO_FILE *, char *, _IO_ssize_t) __THROW;
 446 extern _IO_size_t _IO_default_xsputn (_IO_FILE *, const void *, _IO_size_t);
 447 extern _IO_size_t _IO_wdefault_xsputn (_IO_FILE *, const void *, _IO_size_t);
 448 extern _IO_size_t _IO_default_xsgetn (_IO_FILE *, void *, _IO_size_t);
 449 extern _IO_size_t _IO_wdefault_xsgetn (_IO_FILE *, void *, _IO_size_t);
 450 extern _IO_off64_t _IO_default_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 451      __THROW;
 452 extern _IO_off64_t _IO_default_seekpos (_IO_FILE *, _IO_off64_t, int) __THROW;
 453 extern _IO_ssize_t _IO_default_write (_IO_FILE *, const void *, _IO_ssize_t);
 454 extern _IO_ssize_t _IO_default_read (_IO_FILE *, void *, _IO_ssize_t);
 455 extern int _IO_default_stat (_IO_FILE *, void *) __THROW;
 456 extern _IO_off64_t _IO_default_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
 457 extern int _IO_default_sync (_IO_FILE *) __THROW;
 458 #define _IO_default_close ((_IO_close_t) _IO_default_sync)
 459 extern int _IO_default_showmanyc (_IO_FILE *) __THROW;
 460 extern void _IO_default_imbue (_IO_FILE *, void *) __THROW;
 461
 462 extern const struct _IO_jump_t _IO_file_jumps;
 463 libc_hidden_proto (_IO_file_jumps)
 464 extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden;
 465 extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden;
 466 extern const struct _IO_jump_t _IO_wfile_jumps;
 467 libc_hidden_proto (_IO_wfile_jumps)
 468 extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden;
 469 extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden;
 470 extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden;
 471 extern const struct _IO_jump_t _IO_streambuf_jumps;
 472 extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden;
 473 extern const struct _IO_jump_t _IO_str_jumps attribute_hidden;
 474 extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden;
 475 extern const struct _IO_codecvt __libio_codecvt attribute_hidden;
 476 extern int _IO_do_write (_IO_FILE *, const char *, _IO_size_t) __THROW;
 477 extern int _IO_new_do_write (_IO_FILE *, const char *, _IO_size_t) __THROW;
 478 extern int _IO_old_do_write (_IO_FILE *, const char *, _IO_size_t) __THROW;
 479 extern int _IO_wdo_write (_IO_FILE *, const wchar_t *, _IO_size_t) __THROW;
 480 extern int _IO_flush_all_lockp (int) __THROW;
 481 extern int _IO_flush_all (void) __THROW;
 482 extern int _IO_cleanup (void) __THROW;
 483 extern void _IO_flush_all_linebuffered (void) __THROW;
 484 extern int _IO_new_fgetpos (_IO_FILE *, _IO_fpos_t *) __THROW;
 485 extern int _IO_old_fgetpos (_IO_FILE *, _IO_fpos_t *) __THROW;
 486 extern int _IO_new_fsetpos (_IO_FILE *, const _IO_fpos_t *) __THROW;
 487 extern int _IO_old_fsetpos (_IO_FILE *, const _IO_fpos_t *) __THROW;
 488 extern int _IO_new_fgetpos64 (_IO_FILE *, _IO_fpos64_t *) __THROW;
 489 extern int _IO_old_fgetpos64 (_IO_FILE *, _IO_fpos64_t *) __THROW;
 490 extern int _IO_new_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *) __THROW;
 491 extern int _IO_old_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *) __THROW;
 492 extern void _IO_old_init (_IO_FILE *fp, int flags) __THROW;
 493
 494
 495 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 496 # define _IO_do_flush(_f) \
 497   ((_f)->_mode <= 0                                                           \
 498    ? INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                           \
 499                           (_f)->_IO_write_ptr-(_f)->_IO_write_base)           \
 500    : INTUSE(_IO_wdo_write)(_f, (_f)->_wide_data->_IO_write_base,              \
 501                            ((_f)->_wide_data->_IO_write_ptr                   \
 502                             - (_f)->_wide_data->_IO_write_base)))
 503 #else
 504 # define _IO_do_flush(_f) \
 505    INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                             \
 506                         (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 507 #endif
 508 #define _IO_old_do_flush(_f) \
 509   _IO_old_do_write(_f, (_f)->_IO_write_base, \
 510                    (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 511 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
 512 #define _IO_mask_flags(fp, f, mask) \
 513        ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
 514 #define _IO_setg(fp, eb, g, eg)  ((fp)->_IO_read_base = (eb),\
 515         (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
 516 #define _IO_wsetg(fp, eb, g, eg)  ((fp)->_wide_data->_IO_read_base = (eb),\
 517         (fp)->_wide_data->_IO_read_ptr = (g), \
 518         (fp)->_wide_data->_IO_read_end = (eg))
 519 #define _IO_setp(__fp, __p, __ep) \
 520        ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \
 521         = __p, (__fp)->_IO_write_end = (__ep))
 522 #define _IO_wsetp(__fp, __p, __ep) \
 523        ((__fp)->_wide_data->_IO_write_base \
 524         = (__fp)->_wide_data->_IO_write_ptr = __p, \
 525         (__fp)->_wide_data->_IO_write_end = (__ep))
 526 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
 527 #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL)
 528 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
 529 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
 530 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
 531 #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \
 532                        - (fp)->_wide_data->_IO_buf_base)
 533
 534 /* Jumptable functions for files. */
 535
 536 extern int _IO_file_doallocate (_IO_FILE *) __THROW;
 537 extern _IO_FILE* _IO_file_setbuf (_IO_FILE *, char *, _IO_ssize_t) __THROW;
 538 extern _IO_off64_t _IO_file_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 539      __THROW;
 540 extern _IO_off64_t _IO_file_seekoff_mmap (_IO_FILE *, _IO_off64_t, int, int)
 541      __THROW;
 542 extern _IO_size_t _IO_file_xsputn (_IO_FILE *, const void *, _IO_size_t)
 543      __THROW;
 544 extern _IO_size_t _IO_file_xsgetn (_IO_FILE *, void *, _IO_size_t) __THROW;
 545 extern int _IO_file_stat (_IO_FILE *, void *) __THROW;
 546 extern int _IO_file_close (_IO_FILE *) __THROW;
 547 extern int _IO_file_close_mmap (_IO_FILE *) __THROW;
 548 extern int _IO_file_underflow (_IO_FILE *) __THROW;
 549 extern int _IO_file_underflow_mmap (_IO_FILE *) __THROW;
 550 extern int _IO_file_underflow_maybe_mmap (_IO_FILE *) __THROW;
 551 extern int _IO_file_overflow (_IO_FILE *, int) __THROW;
 552 #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1)
 553 extern void _IO_file_init (struct _IO_FILE_plus *) __THROW;
 554 extern _IO_FILE* _IO_file_attach (_IO_FILE *, int) __THROW;
 555 extern _IO_FILE* _IO_file_open (_IO_FILE *, const char *, int, int, int, int)
 556      __THROW;
 557 libc_hidden_proto (_IO_file_open)
 558 extern _IO_FILE* _IO_file_fopen (_IO_FILE *, const char *, const char *, int)
 559      __THROW;
 560 extern _IO_ssize_t _IO_file_write (_IO_FILE *, const void *, _IO_ssize_t)
 561      __THROW;
 562 extern _IO_ssize_t _IO_file_read (_IO_FILE *, void *, _IO_ssize_t) __THROW;
 563 extern int _IO_file_sync (_IO_FILE *) __THROW;
 564 extern int _IO_file_close_it (_IO_FILE *) __THROW;
 565 extern _IO_off64_t _IO_file_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
 566 extern void _IO_file_finish (_IO_FILE *, int) __THROW;
 567
 568 extern _IO_FILE* _IO_new_file_attach (_IO_FILE *, int) __THROW;
 569 extern int _IO_new_file_close_it (_IO_FILE *) __THROW;
 570 extern void _IO_new_file_finish (_IO_FILE *, int) __THROW;
 571 extern _IO_FILE* _IO_new_file_fopen (_IO_FILE *, const char *, const char *,
 572                                      int) __THROW;
 573 extern void _IO_no_init (_IO_FILE *, int, int, struct _IO_wide_data *,
 574                          const struct _IO_jump_t *) __THROW;
 575 extern void _IO_new_file_init (struct _IO_FILE_plus *) __THROW;
 576 extern _IO_FILE* _IO_new_file_setbuf (_IO_FILE *, char *, _IO_ssize_t) __THROW;
 577 extern _IO_FILE* _IO_file_setbuf_mmap (_IO_FILE *, char *, _IO_ssize_t)
 578      __THROW;
 579 extern int _IO_new_file_sync (_IO_FILE *) __THROW;
 580 extern int _IO_new_file_underflow (_IO_FILE *) __THROW;
 581 extern int _IO_new_file_overflow (_IO_FILE *, int) __THROW;
 582 extern _IO_off64_t _IO_new_file_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 583      __THROW;
 584 extern _IO_ssize_t _IO_new_file_write (_IO_FILE *, const void *, _IO_ssize_t)
 585      __THROW;
 586 extern _IO_size_t _IO_new_file_xsputn (_IO_FILE *, const void *, _IO_size_t)
 587      __THROW;
 588
 589 extern _IO_FILE* _IO_old_file_setbuf (_IO_FILE *, char *, _IO_ssize_t) __THROW;
 590 extern _IO_off64_t _IO_old_file_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 591      __THROW;
 592 extern _IO_size_t _IO_old_file_xsputn (_IO_FILE *, const void *, _IO_size_t)
 593      __THROW;
 594 extern int _IO_old_file_underflow (_IO_FILE *) __THROW;
 595 extern int _IO_old_file_overflow (_IO_FILE *, int) __THROW;
 596 extern void _IO_old_file_init (struct _IO_FILE_plus *) __THROW;
 597 extern _IO_FILE* _IO_old_file_attach (_IO_FILE *, int) __THROW;
 598 extern _IO_FILE* _IO_old_file_fopen (_IO_FILE *, const char *, const char *)
 599      __THROW;
 600 extern _IO_ssize_t _IO_old_file_write (_IO_FILE *, const void *, _IO_ssize_t)
 601      __THROW;
 602 extern int _IO_old_file_sync (_IO_FILE *) __THROW;
 603 extern int _IO_old_file_close_it (_IO_FILE *) __THROW;
 604 extern void _IO_old_file_finish (_IO_FILE *, int) __THROW;
 605
 606 extern int _IO_wfile_doallocate (_IO_FILE *) __THROW;
 607 extern _IO_size_t _IO_wfile_xsputn (_IO_FILE *, const void *, _IO_size_t)
 608      __THROW;
 609 extern _IO_FILE* _IO_wfile_setbuf (_IO_FILE *, wchar_t *, _IO_ssize_t) __THROW;
 610 extern wint_t _IO_wfile_sync (_IO_FILE *) __THROW;
 611 extern wint_t _IO_wfile_underflow (_IO_FILE *) __THROW;
 612 extern wint_t _IO_wfile_overflow (_IO_FILE *, wint_t) __THROW;
 613 extern _IO_off64_t _IO_wfile_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 614      __THROW;
 615
 616 /* Jumptable functions for proc_files. */
 617 extern _IO_FILE* _IO_proc_open (_IO_FILE *, const char *, const char *)
 618      __THROW;
 619 extern _IO_FILE* _IO_new_proc_open (_IO_FILE *, const char *, const char *)
 620      __THROW;
 621 extern _IO_FILE* _IO_old_proc_open (_IO_FILE *, const char *, const char *)
 622      __THROW;
 623 extern int _IO_proc_close (_IO_FILE *) __THROW;
 624 extern int _IO_new_proc_close (_IO_FILE *) __THROW;
 625 extern int _IO_old_proc_close (_IO_FILE *) __THROW;
 626
 627 /* Jumptable functions for strfiles. */
 628 extern int _IO_str_underflow (_IO_FILE *) __THROW;
 629 extern int _IO_str_overflow (_IO_FILE *, int) __THROW;
 630 extern int _IO_str_pbackfail (_IO_FILE *, int) __THROW;
 631 extern _IO_off64_t _IO_str_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW;
 632 extern void _IO_str_finish (_IO_FILE *, int) __THROW;
 633
 634 /* Other strfile functions */
 635 struct _IO_strfile_;
 636 extern void _IO_str_init_static (struct _IO_strfile_ *, char *, int, char *)
 637      __THROW;
 638 extern void _IO_str_init_readonly (struct _IO_strfile_ *, const char *, int)
 639      __THROW;
 640 extern _IO_ssize_t _IO_str_count (_IO_FILE *) __THROW;
 641
 642 /* And the wide character versions.  */
 643 extern void _IO_wstr_init_static (_IO_FILE *, wchar_t *, _IO_size_t, wchar_t *)
 644      __THROW;
 645 extern _IO_ssize_t _IO_wstr_count (_IO_FILE *) __THROW;
 646 extern _IO_wint_t _IO_wstr_overflow (_IO_FILE *, _IO_wint_t) __THROW;
 647 extern _IO_wint_t _IO_wstr_underflow (_IO_FILE *) __THROW;
 648 extern _IO_off64_t _IO_wstr_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 649      __THROW;
 650 extern _IO_wint_t _IO_wstr_pbackfail (_IO_FILE *, _IO_wint_t) __THROW;
 651 extern void _IO_wstr_finish (_IO_FILE *, int) __THROW;
 652
 653 extern int _IO_vasprintf (char **result_ptr, __const char *format,
 654                           _IO_va_list args) __THROW;
 655 extern int _IO_vdprintf (int d, __const char *format, _IO_va_list arg);
 656 extern int _IO_vsnprintf (char *string, _IO_size_t maxlen,
 657                           __const char *format, _IO_va_list args) __THROW;
 658
 659
 660 extern _IO_size_t _IO_getline (_IO_FILE *,char *, _IO_size_t, int, int);
 661 extern _IO_size_t _IO_getline_info (_IO_FILE *,char *, _IO_size_t,
 662                                     int, int, int *);
 663 extern _IO_ssize_t _IO_getdelim (char **, _IO_size_t *, int, _IO_FILE *)
 664      __THROW;
 665 extern _IO_size_t _IO_getwline (_IO_FILE *,wchar_t *, _IO_size_t, wint_t, int);
 666 extern _IO_size_t _IO_getwline_info (_IO_FILE *,wchar_t *, _IO_size_t,
 667                                      wint_t, int, wint_t *);
 668 extern double _IO_strtod (const char *, char **) __THROW;
 669 extern char *_IO_dtoa (double __d, int __mode, int __ndigits,
 670                        int *__decpt, int *__sign, char **__rve) __THROW;
 671 extern int _IO_outfloat (double __value, _IO_FILE *__sb, int __type,
 672                          int __width, int __precision, int __flags,
 673                          int __sign_mode, int __fill) __THROW;
 674
 675 extern struct _IO_FILE_plus *_IO_list_all;
 676 extern void (*_IO_cleanup_registration_needed) (void);
 677
 678 /* Prototype for functions with alternative entry point.  */
 679 extern int _IO_flush_all_internal (void) __THROW;
 680 extern unsigned _IO_adjust_column_internal (unsigned, const char *, int)
 681      __THROW;
 682
 683 extern int _IO_default_uflow_internal (_IO_FILE *) __THROW;
 684 extern void _IO_default_finish_internal (_IO_FILE *, int) __THROW;
 685 extern int _IO_default_pbackfail_internal (_IO_FILE *, int) __THROW;
 686 extern _IO_size_t _IO_default_xsputn_internal (_IO_FILE *, const void *,
 687                                                _IO_size_t) __THROW;
 688 extern _IO_size_t _IO_default_xsgetn_internal (_IO_FILE *, void *, _IO_size_t)
 689      __THROW;
 690 extern int _IO_default_doallocate_internal (_IO_FILE *) __THROW;
 691 extern void _IO_wdefault_finish_internal (_IO_FILE *, int) __THROW;
 692 extern wint_t _IO_wdefault_pbackfail_internal (_IO_FILE *, wint_t) __THROW;
 693 extern _IO_size_t _IO_wdefault_xsputn_internal (_IO_FILE *, const void *,
 694                                                 _IO_size_t) __THROW;
 695 extern _IO_size_t _IO_wdefault_xsgetn_internal (_IO_FILE *, void *,
 696                                                 _IO_size_t) __THROW;
 697 extern int _IO_wdefault_doallocate_internal (_IO_FILE *) __THROW;
 698 extern wint_t _IO_wdefault_uflow_internal (_IO_FILE *) __THROW;
 699
 700 extern int _IO_file_doallocate_internal (_IO_FILE *) __THROW;
 701 extern _IO_FILE* _IO_file_setbuf_internal (_IO_FILE *, char *, _IO_ssize_t)
 702      __THROW;
 703 extern _IO_off64_t _IO_file_seekoff_internal (_IO_FILE *, _IO_off64_t,
 704                                               int, int) __THROW;
 705 extern _IO_size_t _IO_file_xsputn_internal (_IO_FILE *, const void *,
 706                                             _IO_size_t) __THROW;
 707 extern _IO_size_t _IO_file_xsgetn_internal (_IO_FILE *, void *, _IO_size_t)
 708      __THROW;
 709 extern int _IO_file_stat_internal (_IO_FILE *, void *) __THROW;
 710 extern int _IO_file_close_internal (_IO_FILE *) __THROW;
 711 extern int _IO_file_close_it_internal (_IO_FILE *) __THROW;
 712 extern int _IO_file_underflow_internal (_IO_FILE *) __THROW;
 713 extern int _IO_file_overflow_internal (_IO_FILE *, int) __THROW;
 714 extern void _IO_file_init_internal (struct _IO_FILE_plus *) __THROW;
 715 extern _IO_FILE* _IO_file_attach_internal (_IO_FILE *, int) __THROW;
 716 extern _IO_FILE* _IO_file_fopen_internal (_IO_FILE *, const char *,
 717                                           const char *, int) __THROW;
 718 extern _IO_ssize_t _IO_file_read_internal (_IO_FILE *, void *,
 719                                            _IO_ssize_t);
 720 extern int _IO_file_sync_internal (_IO_FILE *) __THROW;
 721 extern _IO_off64_t _IO_file_seek_internal (_IO_FILE *, _IO_off64_t, int)
 722      __THROW;
 723 extern void _IO_file_finish_internal (_IO_FILE *, int) __THROW;
 724
 725 extern _IO_size_t _IO_wfile_xsputn_internal (_IO_FILE *, const void *,
 726                                              _IO_size_t) __THROW;
 727 extern _IO_off64_t _IO_wfile_seekoff_internal (_IO_FILE *, _IO_off64_t,
 728                                                int, int) __THROW;
 729 extern wint_t _IO_wfile_sync_internal (_IO_FILE *) __THROW;
 730
 731 extern int _IO_str_underflow_internal (_IO_FILE *) __THROW;
 732 extern int _IO_str_overflow_internal (_IO_FILE *, int) __THROW;
 733 extern int _IO_str_pbackfail_internal (_IO_FILE *, int) __THROW;
 734 extern _IO_off64_t _IO_str_seekoff_internal (_IO_FILE *, _IO_off64_t,
 735                                              int, int) __THROW;
 736 extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *,
 737                                           _IO_size_t, char *) __THROW;
 738
 739 extern struct _IO_jump_t _IO_file_jumps_internal attribute_hidden;
 740 extern struct _IO_jump_t _IO_wfile_jumps_internal attribute_hidden;
 741
 742 extern struct _IO_FILE_plus *_IO_list_all_internal attribute_hidden;
 743
 744 extern void _IO_link_in_internal (struct _IO_FILE_plus *) __THROW;
 745 extern int _IO_sputbackc_internal (_IO_FILE *, int) __THROW;
 746 extern void _IO_wdoallocbuf_internal (_IO_FILE *) __THROW;
 747
 748 extern _IO_size_t _IO_sgetn_internal (_IO_FILE *, void *, _IO_size_t);
 749 extern void _IO_flush_all_linebuffered_internal (void) __THROW;
 750 extern int _IO_switch_to_wget_mode_internal (_IO_FILE *) __THROW;
 751 extern void _IO_unsave_markers_internal (_IO_FILE *) __THROW;
 752 extern void _IO_switch_to_main_wget_area_internal (_IO_FILE *) __THROW;
 753 extern int _IO_wdo_write_internal (_IO_FILE *, const wchar_t *, _IO_size_t);
 754 extern int _IO_do_write_internal (_IO_FILE *, const char *, _IO_size_t);
 755 extern _IO_ssize_t _IO_padn_internal (_IO_FILE *, int, _IO_ssize_t) __THROW;
 756 extern _IO_size_t _IO_getline_info_internal (_IO_FILE *,char *, _IO_size_t,
 757                                              int, int, int *);
 758 extern _IO_size_t _IO_getline_internal (_IO_FILE *, char *, _IO_size_t, int,
 759                                         int);
 760 extern void _IO_free_wbackup_area_internal (_IO_FILE *) __THROW;
 761 extern void _IO_free_backup_area_internal (_IO_FILE *) __THROW;
 762 extern void _IO_switch_to_wbackup_area_internal (_IO_FILE *) __THROW;
 763 extern void _IO_setb_internal (_IO_FILE *, char *, char *, int) __THROW;
 764 extern wint_t _IO_sputbackwc_internal (_IO_FILE *, wint_t) __THROW;
 765 extern int _IO_switch_to_get_mode_internal (_IO_FILE *) __THROW;
 766 extern int _IO_vfscanf_internal (_IO_FILE * __restrict,
 767                                  const char * __restrict,
 768                                  _IO_va_list, int *__restrict);
 769 extern int _IO_vfprintf_internal (_IO_FILE *__restrict, const char *__restrict,
 770                                   _IO_va_list);
 771 extern void _IO_doallocbuf_internal (_IO_FILE *) __THROW;
 772 extern void _IO_wsetb_internal (_IO_FILE *, wchar_t *, wchar_t *, int)
 773      __THROW;
 774 extern _IO_off64_t _IO_seekoff_unlocked (_IO_FILE *, _IO_off64_t, int, int)
 775      attribute_hidden __THROW;
 776 extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int)
 777      attribute_hidden __THROW;
 778 extern int _IO_putc_internal (int __c, _IO_FILE *__fp);
 779 extern void _IO_init_internal (_IO_FILE *, int) __THROW;
 780 extern void _IO_un_link_internal (struct _IO_FILE_plus *) __THROW;
 781
 782 #ifndef EOF
 783 # define EOF (-1)
 784 #endif
 785 #ifndef NULL
 786 # if defined __GNUG__ && \
 787     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
 788 #  define NULL (__null)
 789 # else
 790 #  if !defined(__cplusplus)
 791 #   define NULL ((void*)0)
 792 #  else
 793 #   define NULL (0)
 794 #  endif
 795 # endif
 796 #endif
 797
 798 #if _G_HAVE_MMAP
 799
 800 # include <unistd.h>
 801 # include <fcntl.h>
 802 # include <sys/mman.h>
 803 # include <sys/param.h>
 804
 805 # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
 806 #  define MAP_ANONYMOUS MAP_ANON
 807 # endif
 808
 809 # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
 810 #  undef _G_HAVE_MMAP
 811 #  define _G_HAVE_MMAP 0
 812 # endif
 813
 814 #endif /* _G_HAVE_MMAP */
 815
 816 #if _G_HAVE_MMAP
 817
 818 # ifdef _LIBC
 819 /* When using this code in the GNU libc we must not pollute the name space.  */
 820 #  define mmap __mmap
 821 #  define munmap __munmap
 822 #  define ftruncate __ftruncate
 823 # endif
 824
 825 # define ROUND_TO_PAGE(_S) \
 826        (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
 827
 828 # define FREE_BUF(_B, _S) \
 829        munmap ((_B), ROUND_TO_PAGE (_S))
 830 # define ALLOC_BUF(_B, _S, _R) \
 831        do {                                                                   \
 832           (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S),                        \
 833                                 PROT_READ | PROT_WRITE,                       \
 834                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);          \
 835           if ((_B) == (char *) MAP_FAILED)                                    \
 836             return (_R);                                                      \
 837        } while (0)
 838 # define ALLOC_WBUF(_B, _S, _R) \
 839        do {                                                                   \
 840           (_B) = (wchar_t *) mmap (0, ROUND_TO_PAGE (_S),                     \
 841                                    PROT_READ | PROT_WRITE,                    \
 842                                    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);       \
 843           if ((_B) == (wchar_t *) MAP_FAILED)                                 \
 844             return (_R);                                                      \
 845        } while (0)
 846
 847 #else /* _G_HAVE_MMAP */
 848
 849 # define FREE_BUF(_B, _S) \
 850        free(_B)
 851 # define ALLOC_BUF(_B, _S, _R) \
 852        do {                                                                   \
 853           (_B) = (char*)malloc(_S);                                           \
 854           if ((_B) == NULL)                                                   \
 855             return (_R);                                                      \
 856        } while (0)
 857 # define ALLOC_WBUF(_B, _S, _R) \
 858        do {                                                                   \
 859           (_B) = (wchar_t *)malloc(_S);                                       \
 860           if ((_B) == NULL)                                                   \
 861             return (_R);                                                      \
 862        } while (0)
 863
 864 #endif /* _G_HAVE_MMAP */
 865
 866 #ifndef OS_FSTAT
 867 # define OS_FSTAT fstat
 868 #endif
 869 struct stat;
 870 extern _IO_ssize_t _IO_read (int, void *, _IO_size_t);
 871 extern _IO_ssize_t _IO_write (int, const void *, _IO_size_t);
 872 extern _IO_off64_t _IO_lseek (int, _IO_off64_t, int) __THROW;
 873 extern int _IO_close (int);
 874 extern int _IO_fstat (int, struct stat *) __THROW;
 875 extern int _IO_vscanf (const char *, _IO_va_list) __THROW;
 876
 877 /* _IO_pos_BAD is an _IO_off64_t value indicating error, unknown, or EOF. */
 878 #ifndef _IO_pos_BAD
 879 # define _IO_pos_BAD ((_IO_off64_t) -1)
 880 #endif
 881 /* _IO_pos_adjust adjust an _IO_off64_t by some number of bytes. */
 882 #ifndef _IO_pos_adjust
 883 # define _IO_pos_adjust(pos, delta) ((pos) += (delta))
 884 #endif
 885 /* _IO_pos_0 is an _IO_off64_t value indicating beginning of file. */
 886 #ifndef _IO_pos_0
 887 # define _IO_pos_0 ((_IO_off64_t) 0)
 888 #endif
 889
 890 #ifdef __cplusplus
 891 }
 892 #endif
 893
 894 #ifdef _IO_MTSAFE_IO
 895 /* check following! */
 896 # ifdef _IO_USE_OLD_IO_FILE
 897 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 898        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 899          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 900          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
 901 # else
 902 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 903 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 904        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 905          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 906          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
 907          NULL, WDP, 0 }
 908 #  else
 909 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 910        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 911          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 912          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
 913          0 }
 914 #  endif
 915 # endif
 916 #else
 917 # ifdef _IO_USE_OLD_IO_FILE
 918 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 919        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 920          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 921          0, _IO_pos_BAD }
 922 # else
 923 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 924 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 925        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 926          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 927          0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 928          NULL, WDP, 0 }
 929 #  else
 930 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 931        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 932          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 933          0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 934          0 }
 935 #  endif
 936 # endif
 937 #endif
 938
 939 /* VTABLE_LABEL defines NAME as of the CLASS class.
 940    CNLENGTH is strlen(#CLASS).  */
 941 #ifdef __GNUC__
 942 # if _G_VTABLE_LABEL_HAS_LENGTH
 943 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 944   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
 945 # else
 946 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 947   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
 948 # endif
 949 #endif /* __GNUC__ */
 950
 951 #if !defined(builtinbuf_vtable) && defined(__cplusplus)
 952 # ifdef __GNUC__
 953 VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10)
 954 # else
 955 #  if _G_VTABLE_LABEL_HAS_LENGTH
 956 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
 957 #  else
 958 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
 959 #  endif
 960 # endif
 961 #endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
 962
 963 #if defined(__STDC__) || defined(__cplusplus)
 964 # define _IO_va_start(args, last) va_start(args, last)
 965 #else
 966 # define _IO_va_start(args, last) va_start(args)
 967 #endif
 968
 969 extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
 970
 971 #if 1
 972 # define COERCE_FILE(FILE) /* Nothing */
 973 #else
 974 /* This is part of the kludge for binary compatibility with old stdio. */
 975 # define COERCE_FILE(FILE) \
 976   (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
 977     && (FILE) = *(FILE**)&((int*)fp)[1])
 978 #endif
 979
 980 #ifdef EINVAL
 981 # define MAYBE_SET_EINVAL __set_errno (EINVAL)
 982 #else
 983 # define MAYBE_SET_EINVAL /* nothing */
 984 #endif
 985
 986 #ifdef IO_DEBUG
 987 # define CHECK_FILE(FILE, RET) \
 988         if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
 989         else { COERCE_FILE(FILE); \
 990                if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
 991           { MAYBE_SET_EINVAL; return RET; }}
 992 #else
 993 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)
 994 #endif
 995
 996 static inline void
 997 __attribute__ ((__always_inline__))
 998 _IO_acquire_lock_fct (_IO_FILE **p)
 999 {
1000   _IO_FILE *fp = *p;
1001   if ((fp->_flags & _IO_USER_LOCK) == 0)
1002     _IO_funlockfile (fp);
1003 }