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