libio/libioP.h

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