libio/libioP.h

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