libio/libioP.h

   1 /* Copyright (C) 1993, 1997-2003,2004,2005,2006,2007,2012
   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, see
  17    <http://www.gnu.org/licenses/>.
  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 <math_ldbl_opt.h>
  39
  40 #include "iolibio.h"
  41
  42 /* Control of exported symbols.  Used in glibc.  By default we don't
  43    do anything.  */
  44 #ifndef INTUSE
  45 # define INTUSE(name) name
  46 #endif
  47 #ifndef INTDEF
  48 # define INTDEF(name)
  49 #endif
  50 #ifndef INTDEF2
  51 # define INTDEF2(name)
  52 #endif
  53 #ifndef libc_hidden_proto
  54 # define libc_hidden_proto(name)
  55 #endif
  56 #ifndef libc_hidden_def
  57 # define libc_hidden_def(name)
  58 #endif
  59 #ifndef libc_hidden_weak
  60 # define libc_hidden_weak(name)
  61 #endif
  62
  63 #ifdef __cplusplus
  64 extern "C" {
  65 #endif
  66
  67 #define _IO_seek_set 0
  68 #define _IO_seek_cur 1
  69 #define _IO_seek_end 2
  70
  71 /* THE JUMPTABLE FUNCTIONS.
  72
  73  * The _IO_FILE type is used to implement the FILE type in GNU libc,
  74  * as well as the streambuf class in GNU iostreams for C++.
  75  * These are all the same, just used differently.
  76  * An _IO_FILE (or FILE) object is allows followed by a pointer to
  77  * a jump table (of pointers to functions).  The pointer is accessed
  78  * with the _IO_JUMPS macro.  The jump table has a eccentric format,
  79  * so as to be compatible with the layout of a C++ virtual function table.
  80  * (as implemented by g++).  When a pointer to a streambuf object is
  81  * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
  82  * happens to point to the virtual function table of the streambuf.
  83  * Thus the _IO_JUMPS function table used for C stdio/libio does
  84  * double duty as the virtual function table for C++ streambuf.
  85  *
  86  * The entries in the _IO_JUMPS function table (and hence also the
  87  * virtual functions of a streambuf) are described below.
  88  * The first parameter of each function entry is the _IO_FILE/streambuf
  89  * object being acted on (i.e. the 'this' parameter).
  90  */
  91
  92 #ifdef _LIBC
  93 # include <shlib-compat.h>
  94 # if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
  95    /* Setting this macro disables the use of the _vtable_offset
  96       bias in _IO_JUMPS_FUNCS, below.  That is only needed if we
  97       want to support old binaries (see oldfileops.c).  */
  98 #  define _G_IO_NO_BACKWARD_COMPAT 1
  99 # endif
 100 #endif
 101
 102 #if (!defined _IO_USE_OLD_IO_FILE \
 103      && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
 104 # define _IO_JUMPS_OFFSET 1
 105 #endif
 106
 107 #define _IO_JUMPS(THIS) (THIS)->vtable
 108 #define _IO_WIDE_JUMPS(THIS) ((struct _IO_FILE *) (THIS))->_wide_data->_wide_vtable
 109 #define _IO_CHECK_WIDE(THIS) (((struct _IO_FILE *) (THIS))->_wide_data != NULL)
 110
 111 #if _IO_JUMPS_OFFSET
 112 # define _IO_JUMPS_FUNC(THIS) \
 113  (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS ((struct _IO_FILE_plus *) (THIS)) \
 114                            + (THIS)->_vtable_offset))
 115 # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset
 116 #else
 117 # define _IO_JUMPS_FUNC(THIS) _IO_JUMPS ((struct _IO_FILE_plus *) (THIS))
 118 # define _IO_vtable_offset(THIS) 0
 119 #endif
 120 #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS)
 121 #ifdef _G_USING_THUNKS
 122 # define JUMP_FIELD(TYPE, NAME) TYPE NAME
 123 # define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS)
 124 # define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 125 # define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 126 # define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 127 # define JUMP_INIT(NAME, VALUE) VALUE
 128 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
 129
 130 # define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS)
 131 # define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
 132 # define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
 133 # define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
 134 #else
 135 /* These macros will change when we re-implement vtables to use "thunks"! */
 136 # define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME
 137 # define JUMP0(FUNC, THIS) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 138 # define JUMP1(FUNC, THIS, X1) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 139 # define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 140 # define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 141 # define JUMP_INIT(NAME, VALUE) {0, 0, VALUE}
 142 # define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0)
 143
 144 # define WJUMP0(FUNC, THIS) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS)
 145 # define WJUMP1(FUNC, THIS, X1) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1)
 146 # define WJUMP2(FUNC, THIS, X1, X2) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1, X2)
 147 # define WJUMP3(FUNC, THIS, X1,X2,X3) _IO_WIDE_JUMPS_FUNC(THIS)->FUNC.pfn (THIS, X1,X2,X3)
 148 #endif
 149
 150 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
 151    It does not delete (free) it, but does everything else to finalize it.
 152    It matches the streambuf::~streambuf virtual destructor.  */
 153 typedef void (*_IO_finish_t) (_IO_FILE *, int); /* finalize */
 154 #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
 155 #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0)
 156
 157 /* The 'overflow' hook flushes the buffer.
 158    The second argument is a character, or EOF.
 159    It matches the streambuf::overflow virtual function. */
 160 typedef int (*_IO_overflow_t) (_IO_FILE *, int);
 161 #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
 162 #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH)
 163
 164 /* The 'underflow' hook tries to fills the get buffer.
 165    It returns the next character (as an unsigned char) or EOF.  The next
 166    character remains in the get buffer, and the get position is not changed.
 167    It matches the streambuf::underflow virtual function. */
 168 typedef int (*_IO_underflow_t) (_IO_FILE *);
 169 #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
 170 #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP)
 171
 172 /* The 'uflow' hook returns the next character in the input stream
 173    (cast to unsigned char), and increments the read position;
 174    EOF is returned on failure.
 175    It matches the streambuf::uflow virtual function, which is not in the
 176    cfront implementation, but was added to C++ by the ANSI/ISO committee. */
 177 #define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
 178 #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP)
 179
 180 /* The 'pbackfail' hook handles backing up.
 181    It matches the streambuf::pbackfail virtual function. */
 182 typedef int (*_IO_pbackfail_t) (_IO_FILE *, int);
 183 #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
 184 #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH)
 185
 186 /* The 'xsputn' hook writes upto N characters from buffer DATA.
 187    Returns the number of character actually written.
 188    It matches the streambuf::xsputn virtual function. */
 189 typedef _IO_size_t (*_IO_xsputn_t) (_IO_FILE *FP, const void *DATA,
 190                                     _IO_size_t N);
 191 #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
 192 #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N)
 193
 194 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
 195    Returns the number of character actually read.
 196    It matches the streambuf::xsgetn virtual function. */
 197 typedef _IO_size_t (*_IO_xsgetn_t) (_IO_FILE *FP, void *DATA, _IO_size_t N);
 198 #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
 199 #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N)
 200
 201 /* The 'seekoff' hook moves the stream position to a new position
 202    relative to the start of the file (if DIR==0), the current position
 203    (MODE==1), or the end of the file (MODE==2).
 204    It matches the streambuf::seekoff virtual function.
 205    It is also used for the ANSI fseek function. */
 206 typedef _IO_off64_t (*_IO_seekoff_t) (_IO_FILE *FP, _IO_off64_t OFF, int DIR,
 207                                       int MODE);
 208 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
 209 #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
 210
 211 /* The 'seekpos' hook also moves the stream position,
 212    but to an absolute position given by a fpos64_t (seekpos).
 213    It matches the streambuf::seekpos virtual function.
 214    It is also used for the ANSI fgetpos and fsetpos functions.  */
 215 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
 216 typedef _IO_off64_t (*_IO_seekpos_t) (_IO_FILE *, _IO_off64_t, int);
 217 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
 218 #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS)
 219
 220 /* The 'setbuf' hook gives a buffer to the file.
 221    It matches the streambuf::setbuf virtual function. */
 222 typedef _IO_FILE* (*_IO_setbuf_t) (_IO_FILE *, char *, _IO_ssize_t);
 223 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
 224 #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH)
 225
 226 /* The 'sync' hook attempts to synchronize the internal data structures
 227    of the file with the external state.
 228    It matches the streambuf::sync virtual function. */
 229 typedef int (*_IO_sync_t) (_IO_FILE *);
 230 #define _IO_SYNC(FP) JUMP0 (__sync, FP)
 231 #define _IO_WSYNC(FP) WJUMP0 (__sync, FP)
 232
 233 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
 234    It matches the streambuf::doallocate virtual function, which is not
 235    in the ANSI/ISO C++ standard, but is part traditional implementations. */
 236 typedef int (*_IO_doallocate_t) (_IO_FILE *);
 237 #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
 238 #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP)
 239
 240 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
 241    sysstat) are low-level hooks specific to this implementation.
 242    There is no correspondence in the ANSI/ISO C++ standard library.
 243    The hooks basically correspond to the Unix system functions
 244    (read, write, close, lseek, and stat) except that a _IO_FILE*
 245    parameter is used instead of a integer file descriptor;  the default
 246    implementation used for normal files just calls those functions.
 247    The advantage of overriding these functions instead of the higher-level
 248    ones (underflow, overflow etc) is that you can leave all the buffering
 249    higher-level functions.  */
 250
 251 /* The 'sysread' hook is used to read data from the external file into
 252    an existing buffer.  It generalizes the Unix read(2) function.
 253    It matches the streambuf::sys_read virtual function, which is
 254    specific to this implementation. */
 255 typedef _IO_ssize_t (*_IO_read_t) (_IO_FILE *, void *, _IO_ssize_t);
 256 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
 257 #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN)
 258
 259 /* The 'syswrite' hook is used to write data from an existing buffer
 260    to an external file.  It generalizes the Unix write(2) function.
 261    It matches the streambuf::sys_write virtual function, which is
 262    specific to this implementation. */
 263 typedef _IO_ssize_t (*_IO_write_t) (_IO_FILE *, const void *, _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) (_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) (_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) (_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) (_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) (_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 #ifdef _IO_USE_OLD_IO_FILE
 352 /* This structure is used by the compatibility code as if it were an
 353    _IO_FILE_plus, but has enough space to initialize the _mode argument
 354    of an _IO_FILE_complete.  */
 355 struct _IO_FILE_complete_plus
 356 {
 357   struct _IO_FILE_complete file;
 358   const struct _IO_jump_t *vtable;
 359 };
 360 #endif
 361
 362 /* Special file type for fopencookie function.  */
 363 struct _IO_cookie_file
 364 {
 365   struct _IO_FILE_plus __fp;
 366   void *__cookie;
 367   _IO_cookie_io_functions_t __io_functions;
 368 };
 369
 370 _IO_FILE *_IO_fopencookie (void *cookie, const char *mode,
 371                            _IO_cookie_io_functions_t io_functions);
 372
 373
 374 /* Iterator type for walking global linked list of _IO_FILE objects. */
 375
 376 typedef struct _IO_FILE *_IO_ITER;
 377
 378 /* Generic functions */
 379
 380 extern void _IO_switch_to_main_get_area (_IO_FILE *) __THROW;
 381 extern void _IO_switch_to_backup_area (_IO_FILE *) __THROW;
 382 extern int _IO_switch_to_get_mode (_IO_FILE *);
 383 extern void _IO_init (_IO_FILE *, int) __THROW;
 384 extern int _IO_sputbackc (_IO_FILE *, int) __THROW;
 385 extern int _IO_sungetc (_IO_FILE *) __THROW;
 386 extern void _IO_un_link (struct _IO_FILE_plus *) __THROW;
 387 extern void _IO_link_in (struct _IO_FILE_plus *) __THROW;
 388 extern void _IO_doallocbuf (_IO_FILE *) __THROW;
 389 extern void _IO_unsave_markers (_IO_FILE *) __THROW;
 390 extern void _IO_setb (_IO_FILE *, char *, char *, int) __THROW;
 391 extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW;
 392 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
 393
 394 extern void _IO_switch_to_main_wget_area (_IO_FILE *) __THROW;
 395 extern void _IO_switch_to_wbackup_area (_IO_FILE *) __THROW;
 396 extern int _IO_switch_to_wget_mode (_IO_FILE *);
 397 extern void _IO_wsetb (_IO_FILE *, wchar_t *, wchar_t *, int) __THROW;
 398 extern wint_t _IO_sputbackwc (_IO_FILE *, wint_t) __THROW;
 399 extern wint_t _IO_sungetwc (_IO_FILE *) __THROW;
 400 extern void _IO_wdoallocbuf (_IO_FILE *) __THROW;
 401 extern void _IO_unsave_wmarkers (_IO_FILE *) __THROW;
 402 extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW;
 403
 404 /* Marker-related function. */
 405
 406 extern void _IO_init_marker (struct _IO_marker *, _IO_FILE *);
 407 extern void _IO_init_wmarker (struct _IO_marker *, _IO_FILE *);
 408 extern void _IO_remove_marker (struct _IO_marker *) __THROW;
 409 extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *)
 410      __THROW;
 411 extern int _IO_marker_delta (struct _IO_marker *) __THROW;
 412 extern int _IO_wmarker_delta (struct _IO_marker *) __THROW;
 413 extern int _IO_seekmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
 414 extern int _IO_seekwmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
 415
 416 /* Functions for iterating global list and dealing with its lock */
 417
 418 extern _IO_ITER _IO_iter_begin (void) __THROW;
 419 libc_hidden_proto (_IO_iter_begin)
 420 extern _IO_ITER _IO_iter_end (void) __THROW;
 421 libc_hidden_proto (_IO_iter_end)
 422 extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW;
 423 libc_hidden_proto (_IO_iter_next)
 424 extern _IO_FILE *_IO_iter_file (_IO_ITER) __THROW;
 425 libc_hidden_proto (_IO_iter_file)
 426 extern void _IO_list_lock (void) __THROW;
 427 libc_hidden_proto (_IO_list_lock)
 428 extern void _IO_list_unlock (void) __THROW;
 429 libc_hidden_proto (_IO_list_unlock)
 430 extern void _IO_list_resetlock (void) __THROW;
 431 libc_hidden_proto (_IO_list_resetlock)
 432
 433 /* Default jumptable functions. */
 434
 435 extern int _IO_default_underflow (_IO_FILE *) __THROW;
 436 extern int _IO_default_uflow (_IO_FILE *);
 437 extern wint_t _IO_wdefault_uflow (_IO_FILE *);
 438 extern int _IO_default_doallocate (_IO_FILE *) __THROW;
 439 extern int _IO_wdefault_doallocate (_IO_FILE *) __THROW;
 440 extern void _IO_default_finish (_IO_FILE *, int) __THROW;
 441 extern void _IO_wdefault_finish (_IO_FILE *, int) __THROW;
 442 extern int _IO_default_pbackfail (_IO_FILE *, int) __THROW;
 443 extern wint_t _IO_wdefault_pbackfail (_IO_FILE *, wint_t) __THROW;
 444 extern _IO_FILE* _IO_default_setbuf (_IO_FILE *, char *, _IO_ssize_t);
 445 extern _IO_size_t _IO_default_xsputn (_IO_FILE *, const void *, _IO_size_t);
 446 extern _IO_size_t _IO_wdefault_xsputn (_IO_FILE *, const void *, _IO_size_t);
 447 extern _IO_size_t _IO_default_xsgetn (_IO_FILE *, void *, _IO_size_t);
 448 extern _IO_size_t _IO_wdefault_xsgetn (_IO_FILE *, void *, _IO_size_t);
 449 extern _IO_off64_t _IO_default_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 450      __THROW;
 451 extern _IO_off64_t _IO_default_seekpos (_IO_FILE *, _IO_off64_t, int);
 452 extern _IO_ssize_t _IO_default_write (_IO_FILE *, const void *, _IO_ssize_t);
 453 extern _IO_ssize_t _IO_default_read (_IO_FILE *, void *, _IO_ssize_t);
 454 extern int _IO_default_stat (_IO_FILE *, void *) __THROW;
 455 extern _IO_off64_t _IO_default_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
 456 extern int _IO_default_sync (_IO_FILE *) __THROW;
 457 #define _IO_default_close ((_IO_close_t) _IO_default_sync)
 458 extern int _IO_default_showmanyc (_IO_FILE *) __THROW;
 459 extern void _IO_default_imbue (_IO_FILE *, void *) __THROW;
 460
 461 extern const struct _IO_jump_t _IO_file_jumps;
 462 libc_hidden_proto (_IO_file_jumps)
 463 extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden;
 464 extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden;
 465 extern const struct _IO_jump_t _IO_wfile_jumps;
 466 libc_hidden_proto (_IO_wfile_jumps)
 467 extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden;
 468 extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden;
 469 extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden;
 470 extern const struct _IO_jump_t _IO_streambuf_jumps;
 471 extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden;
 472 extern const struct _IO_jump_t _IO_str_jumps attribute_hidden;
 473 extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden;
 474 extern const struct _IO_codecvt __libio_codecvt attribute_hidden;
 475 extern int _IO_do_write (_IO_FILE *, const char *, _IO_size_t);
 476 extern int _IO_new_do_write (_IO_FILE *, const char *, _IO_size_t);
 477 extern int _IO_old_do_write (_IO_FILE *, const char *, _IO_size_t);
 478 extern int _IO_wdo_write (_IO_FILE *, const wchar_t *, _IO_size_t);
 479 extern int _IO_flush_all_lockp (int);
 480 extern int _IO_flush_all (void);
 481 extern int _IO_cleanup (void);
 482 extern void _IO_flush_all_linebuffered (void);
 483 extern int _IO_new_fgetpos (_IO_FILE *, _IO_fpos_t *);
 484 extern int _IO_old_fgetpos (_IO_FILE *, _IO_fpos_t *);
 485 extern int _IO_new_fsetpos (_IO_FILE *, const _IO_fpos_t *);
 486 extern int _IO_old_fsetpos (_IO_FILE *, const _IO_fpos_t *);
 487 extern int _IO_new_fgetpos64 (_IO_FILE *, _IO_fpos64_t *);
 488 extern int _IO_old_fgetpos64 (_IO_FILE *, _IO_fpos64_t *);
 489 extern int _IO_new_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *);
 490 extern int _IO_old_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *);
 491 extern void _IO_old_init (_IO_FILE *fp, int flags) __THROW;
 492
 493
 494 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 495 # define _IO_do_flush(_f) \
 496   ((_f)->_mode <= 0                                                           \
 497    ? INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                           \
 498                           (_f)->_IO_write_ptr-(_f)->_IO_write_base)           \
 499    : INTUSE(_IO_wdo_write)(_f, (_f)->_wide_data->_IO_write_base,              \
 500                            ((_f)->_wide_data->_IO_write_ptr                   \
 501                             - (_f)->_wide_data->_IO_write_base)))
 502 #else
 503 # define _IO_do_flush(_f) \
 504    INTUSE(_IO_do_write)(_f, (_f)->_IO_write_base,                             \
 505                         (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 506 #endif
 507 #define _IO_old_do_flush(_f) \
 508   _IO_old_do_write(_f, (_f)->_IO_write_base, \
 509                    (_f)->_IO_write_ptr-(_f)->_IO_write_base)
 510 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
 511 #define _IO_mask_flags(fp, f, mask) \
 512        ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
 513 #define _IO_setg(fp, eb, g, eg)  ((fp)->_IO_read_base = (eb),\
 514         (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
 515 #define _IO_wsetg(fp, eb, g, eg)  ((fp)->_wide_data->_IO_read_base = (eb),\
 516         (fp)->_wide_data->_IO_read_ptr = (g), \
 517         (fp)->_wide_data->_IO_read_end = (eg))
 518 #define _IO_setp(__fp, __p, __ep) \
 519        ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \
 520         = __p, (__fp)->_IO_write_end = (__ep))
 521 #define _IO_wsetp(__fp, __p, __ep) \
 522        ((__fp)->_wide_data->_IO_write_base \
 523         = (__fp)->_wide_data->_IO_write_ptr = __p, \
 524         (__fp)->_wide_data->_IO_write_end = (__ep))
 525 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
 526 #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL)
 527 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
 528 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
 529 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
 530 #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \
 531                        - (fp)->_wide_data->_IO_buf_base)
 532
 533 /* Jumptable functions for files. */
 534
 535 extern int _IO_file_doallocate (_IO_FILE *) __THROW;
 536 extern _IO_FILE* _IO_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
 537 extern _IO_off64_t _IO_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 538 extern _IO_off64_t _IO_file_seekoff_mmap (_IO_FILE *, _IO_off64_t, int, int)
 539      __THROW;
 540 extern _IO_size_t _IO_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
 541 extern _IO_size_t _IO_file_xsgetn (_IO_FILE *, void *, _IO_size_t);
 542 extern int _IO_file_stat (_IO_FILE *, void *) __THROW;
 543 extern int _IO_file_close (_IO_FILE *) __THROW;
 544 extern int _IO_file_close_mmap (_IO_FILE *) __THROW;
 545 extern int _IO_file_underflow (_IO_FILE *);
 546 extern int _IO_file_underflow_mmap (_IO_FILE *);
 547 extern int _IO_file_underflow_maybe_mmap (_IO_FILE *);
 548 extern int _IO_file_overflow (_IO_FILE *, int);
 549 #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1)
 550 extern void _IO_file_init (struct _IO_FILE_plus *) __THROW;
 551 extern _IO_FILE* _IO_file_attach (_IO_FILE *, int);
 552 extern _IO_FILE* _IO_file_open (_IO_FILE *, const char *, int, int, int, int);
 553 libc_hidden_proto (_IO_file_open)
 554 extern _IO_FILE* _IO_file_fopen (_IO_FILE *, const char *, const char *, int);
 555 extern _IO_ssize_t _IO_file_write (_IO_FILE *, const void *, _IO_ssize_t);
 556 extern _IO_ssize_t _IO_file_read (_IO_FILE *, void *, _IO_ssize_t);
 557 extern int _IO_file_sync (_IO_FILE *);
 558 extern int _IO_file_close_it (_IO_FILE *);
 559 extern _IO_off64_t _IO_file_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
 560 extern void _IO_file_finish (_IO_FILE *, int);
 561
 562 extern _IO_FILE* _IO_new_file_attach (_IO_FILE *, int);
 563 extern int _IO_new_file_close_it (_IO_FILE *);
 564 extern void _IO_new_file_finish (_IO_FILE *, int);
 565 extern _IO_FILE* _IO_new_file_fopen (_IO_FILE *, const char *, const char *,
 566                                      int);
 567 extern void _IO_no_init (_IO_FILE *, int, int, struct _IO_wide_data *,
 568                          const struct _IO_jump_t *) __THROW;
 569 extern void _IO_new_file_init (struct _IO_FILE_plus *) __THROW;
 570 extern _IO_FILE* _IO_new_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
 571 extern _IO_FILE* _IO_file_setbuf_mmap (_IO_FILE *, char *, _IO_ssize_t);
 572 extern int _IO_new_file_sync (_IO_FILE *);
 573 extern int _IO_new_file_underflow (_IO_FILE *);
 574 extern int _IO_new_file_overflow (_IO_FILE *, int);
 575 extern _IO_off64_t _IO_new_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 576 extern _IO_ssize_t _IO_new_file_write (_IO_FILE *, const void *, _IO_ssize_t);
 577 extern _IO_size_t _IO_new_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
 578
 579 extern _IO_FILE* _IO_old_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
 580 extern _IO_off64_t _IO_old_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 581 extern _IO_size_t _IO_old_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
 582 extern int _IO_old_file_underflow (_IO_FILE *);
 583 extern int _IO_old_file_overflow (_IO_FILE *, int);
 584 extern void _IO_old_file_init (struct _IO_FILE_plus *) __THROW;
 585 extern _IO_FILE* _IO_old_file_attach (_IO_FILE *, int);
 586 extern _IO_FILE* _IO_old_file_fopen (_IO_FILE *, const char *, const char *);
 587 extern _IO_ssize_t _IO_old_file_write (_IO_FILE *, const void *, _IO_ssize_t);
 588 extern int _IO_old_file_sync (_IO_FILE *);
 589 extern int _IO_old_file_close_it (_IO_FILE *);
 590 extern void _IO_old_file_finish (_IO_FILE *, int);
 591
 592 extern int _IO_wfile_doallocate (_IO_FILE *) __THROW;
 593 extern _IO_size_t _IO_wfile_xsputn (_IO_FILE *, const void *, _IO_size_t);
 594 extern _IO_FILE* _IO_wfile_setbuf (_IO_FILE *, wchar_t *, _IO_ssize_t);
 595 extern wint_t _IO_wfile_sync (_IO_FILE *);
 596 extern wint_t _IO_wfile_underflow (_IO_FILE *);
 597 extern wint_t _IO_wfile_overflow (_IO_FILE *, wint_t);
 598 extern _IO_off64_t _IO_wfile_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 599
 600 /* Jumptable functions for proc_files. */
 601 extern _IO_FILE* _IO_proc_open (_IO_FILE *, const char *, const char *)
 602      __THROW;
 603 extern _IO_FILE* _IO_new_proc_open (_IO_FILE *, const char *, const char *)
 604      __THROW;
 605 extern _IO_FILE* _IO_old_proc_open (_IO_FILE *, const char *, const char *);
 606 extern int _IO_proc_close (_IO_FILE *) __THROW;
 607 extern int _IO_new_proc_close (_IO_FILE *) __THROW;
 608 extern int _IO_old_proc_close (_IO_FILE *);
 609
 610 /* Jumptable functions for strfiles. */
 611 extern int _IO_str_underflow (_IO_FILE *) __THROW;
 612 extern int _IO_str_overflow (_IO_FILE *, int) __THROW;
 613 extern int _IO_str_pbackfail (_IO_FILE *, int) __THROW;
 614 extern _IO_off64_t _IO_str_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW;
 615 extern void _IO_str_finish (_IO_FILE *, int) __THROW;
 616
 617 /* Other strfile functions */
 618 struct _IO_strfile_;
 619 extern void _IO_str_init_static (struct _IO_strfile_ *, char *, int, char *)
 620      __THROW;
 621 extern void _IO_str_init_readonly (struct _IO_strfile_ *, const char *, int)
 622      __THROW;
 623 extern _IO_ssize_t _IO_str_count (_IO_FILE *) __THROW;
 624
 625 /* And the wide character versions.  */
 626 extern void _IO_wstr_init_static (_IO_FILE *, wchar_t *, _IO_size_t, wchar_t *)
 627      __THROW;
 628 extern _IO_ssize_t _IO_wstr_count (_IO_FILE *) __THROW;
 629 extern _IO_wint_t _IO_wstr_overflow (_IO_FILE *, _IO_wint_t) __THROW;
 630 extern _IO_wint_t _IO_wstr_underflow (_IO_FILE *) __THROW;
 631 extern _IO_off64_t _IO_wstr_seekoff (_IO_FILE *, _IO_off64_t, int, int)
 632      __THROW;
 633 extern _IO_wint_t _IO_wstr_pbackfail (_IO_FILE *, _IO_wint_t) __THROW;
 634 extern void _IO_wstr_finish (_IO_FILE *, int) __THROW;
 635
 636 extern int _IO_vasprintf (char **result_ptr, const char *format,
 637                           _IO_va_list args) __THROW;
 638 extern int _IO_vdprintf (int d, const char *format, _IO_va_list arg);
 639 extern int _IO_vsnprintf (char *string, _IO_size_t maxlen,
 640                           const char *format, _IO_va_list args) __THROW;
 641
 642
 643 extern _IO_size_t _IO_getline (_IO_FILE *,char *, _IO_size_t, int, int);
 644 extern _IO_size_t _IO_getline_info (_IO_FILE *,char *, _IO_size_t,
 645                                     int, int, int *);
 646 extern _IO_ssize_t _IO_getdelim (char **, _IO_size_t *, int, _IO_FILE *);
 647 extern _IO_size_t _IO_getwline (_IO_FILE *,wchar_t *, _IO_size_t, wint_t, int);
 648 extern _IO_size_t _IO_getwline_info (_IO_FILE *,wchar_t *, _IO_size_t,
 649                                      wint_t, int, wint_t *);
 650
 651 extern struct _IO_FILE_plus *_IO_list_all;
 652 extern void (*_IO_cleanup_registration_needed) (void);
 653
 654 /* Prototype for functions with alternative entry point.  */
 655 extern int _IO_flush_all_internal (void);
 656 extern unsigned _IO_adjust_column_internal (unsigned, const char *, int);
 657
 658 extern int _IO_default_uflow_internal (_IO_FILE *);
 659 extern void _IO_default_finish_internal (_IO_FILE *, int) __THROW;
 660 extern int _IO_default_pbackfail_internal (_IO_FILE *, int) __THROW;
 661 extern _IO_size_t _IO_default_xsputn_internal (_IO_FILE *, const void *,
 662                                                _IO_size_t);
 663 extern _IO_size_t _IO_default_xsgetn_internal (_IO_FILE *, void *, _IO_size_t);
 664 extern int _IO_default_doallocate_internal (_IO_FILE *) __THROW;
 665 extern void _IO_wdefault_finish_internal (_IO_FILE *, int) __THROW;
 666 extern wint_t _IO_wdefault_pbackfail_internal (_IO_FILE *, wint_t) __THROW;
 667 extern _IO_size_t _IO_wdefault_xsputn_internal (_IO_FILE *, const void *,
 668                                                 _IO_size_t);
 669 extern _IO_size_t _IO_wdefault_xsgetn_internal (_IO_FILE *, void *,
 670                                                 _IO_size_t);
 671 extern int _IO_wdefault_doallocate_internal (_IO_FILE *) __THROW;
 672 extern wint_t _IO_wdefault_uflow_internal (_IO_FILE *);
 673
 674 extern int _IO_file_doallocate_internal (_IO_FILE *) __THROW;
 675 extern _IO_FILE* _IO_file_setbuf_internal (_IO_FILE *, char *, _IO_ssize_t);
 676 extern _IO_off64_t _IO_file_seekoff_internal (_IO_FILE *, _IO_off64_t,
 677                                               int, int);
 678 extern _IO_size_t _IO_file_xsputn_internal (_IO_FILE *, const void *,
 679                                             _IO_size_t);
 680 extern _IO_size_t _IO_file_xsgetn_internal (_IO_FILE *, void *, _IO_size_t);
 681 extern int _IO_file_stat_internal (_IO_FILE *, void *) __THROW;
 682 extern int _IO_file_close_internal (_IO_FILE *) __THROW;
 683 extern int _IO_file_close_it_internal (_IO_FILE *);
 684 extern int _IO_file_underflow_internal (_IO_FILE *);
 685 extern int _IO_file_overflow_internal (_IO_FILE *, int);
 686 extern void _IO_file_init_internal (struct _IO_FILE_plus *) __THROW;
 687 extern _IO_FILE* _IO_file_attach_internal (_IO_FILE *, int);
 688 extern _IO_FILE* _IO_file_fopen_internal (_IO_FILE *, const char *,
 689                                           const char *, int);
 690 extern _IO_ssize_t _IO_file_read_internal (_IO_FILE *, void *,
 691                                            _IO_ssize_t);
 692 extern int _IO_file_sync_internal (_IO_FILE *);
 693 extern _IO_off64_t _IO_file_seek_internal (_IO_FILE *, _IO_off64_t, int)
 694      __THROW;
 695 extern void _IO_file_finish_internal (_IO_FILE *, int);
 696
 697 extern _IO_size_t _IO_wfile_xsputn_internal (_IO_FILE *, const void *,
 698                                              _IO_size_t);
 699 extern _IO_off64_t _IO_wfile_seekoff_internal (_IO_FILE *, _IO_off64_t,
 700                                                int, int);
 701 extern wint_t _IO_wfile_sync_internal (_IO_FILE *);
 702
 703 extern int _IO_str_underflow_internal (_IO_FILE *) __THROW;
 704 extern int _IO_str_overflow_internal (_IO_FILE *, int) __THROW;
 705 extern int _IO_str_pbackfail_internal (_IO_FILE *, int) __THROW;
 706 extern _IO_off64_t _IO_str_seekoff_internal (_IO_FILE *, _IO_off64_t,
 707                                              int, int) __THROW;
 708 extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *,
 709                                           _IO_size_t, char *) __THROW;
 710
 711 extern struct _IO_jump_t _IO_file_jumps_internal attribute_hidden;
 712 extern struct _IO_jump_t _IO_wfile_jumps_internal attribute_hidden;
 713
 714 extern struct _IO_FILE_plus *_IO_list_all_internal attribute_hidden;
 715
 716 extern void _IO_link_in_internal (struct _IO_FILE_plus *) __THROW;
 717 extern int _IO_sputbackc_internal (_IO_FILE *, int) __THROW;
 718 extern void _IO_wdoallocbuf_internal (_IO_FILE *) __THROW;
 719
 720 extern _IO_size_t _IO_sgetn_internal (_IO_FILE *, void *, _IO_size_t);
 721 extern void _IO_flush_all_linebuffered_internal (void) __THROW;
 722 extern int _IO_switch_to_wget_mode_internal (_IO_FILE *);
 723 extern void _IO_unsave_markers_internal (_IO_FILE *) __THROW;
 724 extern void _IO_switch_to_main_wget_area_internal (_IO_FILE *) __THROW;
 725 extern int _IO_wdo_write_internal (_IO_FILE *, const wchar_t *, _IO_size_t);
 726 extern int _IO_do_write_internal (_IO_FILE *, const char *, _IO_size_t);
 727 extern _IO_ssize_t _IO_padn_internal (_IO_FILE *, int, _IO_ssize_t);
 728 extern _IO_size_t _IO_getline_info_internal (_IO_FILE *,char *, _IO_size_t,
 729                                              int, int, int *);
 730 extern _IO_size_t _IO_getline_internal (_IO_FILE *, char *, _IO_size_t, int,
 731                                         int);
 732 extern void _IO_free_wbackup_area_internal (_IO_FILE *) __THROW;
 733 extern void _IO_free_backup_area_internal (_IO_FILE *) __THROW;
 734 extern void _IO_switch_to_wbackup_area_internal (_IO_FILE *) __THROW;
 735 extern void _IO_setb_internal (_IO_FILE *, char *, char *, int) __THROW;
 736 extern wint_t _IO_sputbackwc_internal (_IO_FILE *, wint_t) __THROW;
 737 extern int _IO_switch_to_get_mode_internal (_IO_FILE *);
 738 extern int _IO_vfscanf_internal (_IO_FILE * __restrict,
 739                                  const char * __restrict,
 740                                  _IO_va_list, int *__restrict);
 741 extern int _IO_vfprintf_internal (_IO_FILE *__restrict, const char *__restrict,
 742                                   _IO_va_list);
 743 extern void _IO_doallocbuf_internal (_IO_FILE *) __THROW;
 744 extern void _IO_wsetb_internal (_IO_FILE *, wchar_t *, wchar_t *, int)
 745      __THROW;
 746 extern _IO_off64_t _IO_seekoff_unlocked (_IO_FILE *, _IO_off64_t, int, int)
 747      attribute_hidden;
 748 extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int)
 749      attribute_hidden;
 750 extern int _IO_putc_internal (int __c, _IO_FILE *__fp);
 751 extern void _IO_init_internal (_IO_FILE *, int) __THROW;
 752 extern void _IO_un_link_internal (struct _IO_FILE_plus *) __THROW;
 753
 754 #ifndef EOF
 755 # define EOF (-1)
 756 #endif
 757 #ifndef NULL
 758 # if defined __GNUG__ && \
 759     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
 760 #  define NULL (__null)
 761 # else
 762 #  if !defined(__cplusplus)
 763 #   define NULL ((void*)0)
 764 #  else
 765 #   define NULL (0)
 766 #  endif
 767 # endif
 768 #endif
 769
 770 #if _G_HAVE_MMAP
 771
 772 # include <unistd.h>
 773 # include <fcntl.h>
 774 # include <sys/mman.h>
 775 # include <sys/param.h>
 776
 777 # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
 778 #  define MAP_ANONYMOUS MAP_ANON
 779 # endif
 780
 781 # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
 782 #  undef _G_HAVE_MMAP
 783 #  define _G_HAVE_MMAP 0
 784 # endif
 785
 786 #endif /* _G_HAVE_MMAP */
 787
 788 #if _G_HAVE_MMAP
 789
 790 # ifdef _LIBC
 791 /* When using this code in the GNU libc we must not pollute the name space.  */
 792 #  define mmap __mmap
 793 #  define munmap __munmap
 794 #  define ftruncate __ftruncate
 795 # endif
 796
 797 # define ROUND_TO_PAGE(_S) \
 798        (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
 799
 800 # define FREE_BUF(_B, _S) \
 801        munmap ((_B), ROUND_TO_PAGE (_S))
 802 # define ALLOC_BUF(_B, _S, _R) \
 803        do {                                                                   \
 804           (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S),                        \
 805                                 PROT_READ | PROT_WRITE,                       \
 806                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);          \
 807           if ((_B) == (char *) MAP_FAILED)                                    \
 808             return (_R);                                                      \
 809        } while (0)
 810 # define ALLOC_WBUF(_B, _S, _R) \
 811        do {                                                                   \
 812           (_B) = (wchar_t *) mmap (0, ROUND_TO_PAGE (_S),                     \
 813                                    PROT_READ | PROT_WRITE,                    \
 814                                    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);       \
 815           if ((_B) == (wchar_t *) MAP_FAILED)                                 \
 816             return (_R);                                                      \
 817        } while (0)
 818
 819 #else /* _G_HAVE_MMAP */
 820
 821 # define FREE_BUF(_B, _S) \
 822        free(_B)
 823 # define ALLOC_BUF(_B, _S, _R) \
 824        do {                                                                   \
 825           (_B) = (char*)malloc(_S);                                           \
 826           if ((_B) == NULL)                                                   \
 827             return (_R);                                                      \
 828        } while (0)
 829 # define ALLOC_WBUF(_B, _S, _R) \
 830        do {                                                                   \
 831           (_B) = (wchar_t *)malloc(_S);                                       \
 832           if ((_B) == NULL)                                                   \
 833             return (_R);                                                      \
 834        } while (0)
 835
 836 #endif /* _G_HAVE_MMAP */
 837
 838 #ifndef OS_FSTAT
 839 # define OS_FSTAT fstat
 840 #endif
 841 extern int _IO_vscanf (const char *, _IO_va_list) __THROW;
 842
 843 /* _IO_pos_BAD is an _IO_off64_t value indicating error, unknown, or EOF. */
 844 #ifndef _IO_pos_BAD
 845 # define _IO_pos_BAD ((_IO_off64_t) -1)
 846 #endif
 847 /* _IO_pos_adjust adjust an _IO_off64_t by some number of bytes. */
 848 #ifndef _IO_pos_adjust
 849 # define _IO_pos_adjust(pos, delta) ((pos) += (delta))
 850 #endif
 851 /* _IO_pos_0 is an _IO_off64_t value indicating beginning of file. */
 852 #ifndef _IO_pos_0
 853 # define _IO_pos_0 ((_IO_off64_t) 0)
 854 #endif
 855
 856 #ifdef __cplusplus
 857 }
 858 #endif
 859
 860 #ifdef _IO_MTSAFE_IO
 861 /* check following! */
 862 # ifdef _IO_USE_OLD_IO_FILE
 863 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 864        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 865          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 866          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
 867 # else
 868 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 869 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 870        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 871          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 872          0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
 873          NULL, WDP, 0 }
 874 #  else
 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, _IO_pos_BAD,\
 879          0 }
 880 #  endif
 881 # endif
 882 #else
 883 # ifdef _IO_USE_OLD_IO_FILE
 884 #  define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 885        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 886          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 887          0, _IO_pos_BAD }
 888 # else
 889 #  if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 890 #   define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
 891        { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
 892          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
 893          0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 894          NULL, WDP, 0 }
 895 #  else
 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, 0, 0, { 0 }, 0, _IO_pos_BAD, \
 900          0 }
 901 #  endif
 902 # endif
 903 #endif
 904
 905 /* VTABLE_LABEL defines NAME as of the CLASS class.
 906    CNLENGTH is strlen(#CLASS).  */
 907 #ifdef __GNUC__
 908 # if _G_VTABLE_LABEL_HAS_LENGTH
 909 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 910   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
 911 # else
 912 #  define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
 913   extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
 914 # endif
 915 #endif /* __GNUC__ */
 916
 917 #if !defined(builtinbuf_vtable) && defined(__cplusplus)
 918 # ifdef __GNUC__
 919 VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10)
 920 # else
 921 #  if _G_VTABLE_LABEL_HAS_LENGTH
 922 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
 923 #  else
 924 #   define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
 925 #  endif
 926 # endif
 927 #endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */
 928
 929 #define _IO_va_start(args, last) va_start(args, last)
 930
 931 extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
 932
 933 #if 1
 934 # define COERCE_FILE(FILE) /* Nothing */
 935 #else
 936 /* This is part of the kludge for binary compatibility with old stdio. */
 937 # define COERCE_FILE(FILE) \
 938   (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
 939     && (FILE) = *(FILE**)&((int*)fp)[1])
 940 #endif
 941
 942 #ifdef EINVAL
 943 # define MAYBE_SET_EINVAL __set_errno (EINVAL)
 944 #else
 945 # define MAYBE_SET_EINVAL /* nothing */
 946 #endif
 947
 948 #ifdef IO_DEBUG
 949 # define CHECK_FILE(FILE, RET) \
 950         if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
 951         else { COERCE_FILE(FILE); \
 952                if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
 953           { MAYBE_SET_EINVAL; return RET; }}
 954 #else
 955 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)
 956 #endif
 957
 958 static inline void
 959 __attribute__ ((__always_inline__))
 960 _IO_acquire_lock_fct (_IO_FILE **p)
 961 {
 962   _IO_FILE *fp = *p;
 963   if ((fp->_flags & _IO_USER_LOCK) == 0)
 964     _IO_funlockfile (fp);
 965 }
 966
 967 static inline void
 968 __attribute__ ((__always_inline__))
 969 _IO_acquire_lock_clear_flags2_fct (_IO_FILE **p)
 970 {
 971   _IO_FILE *fp = *p;
 972   fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY | _IO_FLAGS2_SCANF_STD);
 973   if ((fp->_flags & _IO_USER_LOCK) == 0)
 974     _IO_funlockfile (fp);
 975 }