1/* Copyright (C) 1993, 1997 Free Software Foundation, Inc. 2 This file is part of the GNU IO Library. 3 4 This library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU General Public License as 6 published by the Free Software Foundation; either version 2, or (at 7 your option) any later version. 8 9 This library is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this library; see the file COPYING. If not, write to 16 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 17 MA 02111-1307, USA. 18 19 As a special exception, if you link this library with files 20 compiled with a GNU compiler to produce an executable, this does 21 not cause the resulting executable to be covered by the GNU General 22 Public License. This exception does not however invalidate any 23 other reasons why the executable file might be covered by the GNU 24 General Public License. */ 25 26#ifndef _POSIX_SOURCE 27# define _POSIX_SOURCE 28#endif 29 30#include <errno.h> 31#ifndef __set_errno 32# define __set_errno(Val) errno = (Val) 33#endif 34 35#ifdef _IO_MTSAFE_IO 36# if defined __GLIBC__ && (__GLIBC__ >= 2 || __GLIBC__ <= -2) 37# if __GLIBC_MINOR__ > 0 38# include <bits/libc-lock.h> 39# else 40# include <libc-lock.h> 41# endif 42# else 43/*# include <comthread.h>*/ 44# endif 45#endif 46 47#include "iolibio.h" 48 49#ifdef __cplusplus 50extern "C" { 51#endif 52 53#define _IO_seek_set 0 54#define _IO_seek_cur 1 55#define _IO_seek_end 2 56 57/* THE JUMPTABLE FUNCTIONS. 58 59 * The _IO_FILE type is used to implement the FILE type in GNU libc, 60 * as well as the streambuf class in GNU iostreams for C++. 61 * These are all the same, just used differently. 62 * An _IO_FILE (or FILE) object is allows followed by a pointer to 63 * a jump table (of pointers to functions). The pointer is accessed 64 * with the _IO_JUMPS macro. The jump table has a eccentric format, 65 * so as to be compatible with the layout of a C++ virtual function table. 66 * (as implemented by g++). When a pointer to a streambuf object is 67 * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just 68 * happens to point to the virtual function table of the streambuf. 69 * Thus the _IO_JUMPS function table used for C stdio/libio does 70 * double duty as the virtual function table for C++ streambuf. 71 * 72 * The entries in the _IO_JUMPS function table (and hence also the 73 * virtual functions of a streambuf) are described below. 74 * The first parameter of each function entry is the _IO_FILE/streambuf 75 * object being acted on (i.e. the 'this' parameter). 76 */ 77 78#define _IO_JUMPS(THIS) ((struct _IO_FILE_plus *) (THIS))->vtable 79#ifdef _G_USING_THUNKS 80# define JUMP_FIELD(TYPE, NAME) TYPE NAME 81# define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC (THIS) 82# define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC (THIS, X1) 83# define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC (THIS, X1, X2) 84# define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC (THIS, X1,X2, X3) 85# define JUMP_INIT(NAME, VALUE) VALUE 86# define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0) 87#else 88/* These macros will change when we re-implement vtables to use "thunks"! */ 89# define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME 90# define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC.pfn (THIS) 91# define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1) 92# define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1, X2) 93# define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC.pfn (THIS, X1,X2,X3) 94# define JUMP_INIT(NAME, VALUE) {0, 0, VALUE} 95# define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0) 96#endif 97 98/* The 'finish' function does any final cleaning up of an _IO_FILE object. 99 It does not delete (free) it, but does everything else to finalize it/ 100 It matches the streambuf::~streambuf virtual destructor. */ 101typedef void (*_IO_finish_t) __PMT ((_IO_FILE *, int)); /* finalize */ 102#define _IO_FINISH(FP) JUMP1 (__finish, FP, 0) 103 104/* The 'overflow' hook flushes the buffer. 105 The second argument is a character, or EOF. 106 It matches the streambuf::overflow virtual function. */ 107typedef int (*_IO_overflow_t) __PMT ((_IO_FILE *, int)); 108#define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH) 109 110/* The 'underflow' hook tries to fills the get buffer. 111 It returns the next character (as an unsigned char) or EOF. The next 112 character remains in the get buffer, and the get position is not changed. 113 It matches the streambuf::underflow virtual function. */ 114typedef int (*_IO_underflow_t) __PMT ((_IO_FILE *)); 115#define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP) 116 117/* The 'uflow' hook returns the next character in the input stream 118 (cast to unsigned char), and increments the read position; 119 EOF is returned on failure. 120 It matches the streambuf::uflow virtual function, which is not in the 121 cfront implementation, but was added to C++ by the ANSI/ISO committee. */ 122#define _IO_UFLOW(FP) JUMP0 (__uflow, FP) 123 124/* The 'pbackfail' hook handles backing up. 125 It matches the streambuf::pbackfail virtual function. */ 126typedef int (*_IO_pbackfail_t) __PMT ((_IO_FILE *, int)); 127#define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH) 128 129/* The 'xsputn' hook writes upto N characters from buffer DATA. 130 Returns the number of character actually written. 131 It matches the streambuf::xsputn virtual function. */ 132typedef _IO_size_t (*_IO_xsputn_t) __PMT ((_IO_FILE *FP, const void *DATA, 133 _IO_size_t N)); 134#define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N) 135 136/* The 'xsgetn' hook reads upto N characters into buffer DATA. 137 Returns the number of character actually read. 138 It matches the streambuf::xsgetn virtual function. */ 139typedef _IO_size_t (*_IO_xsgetn_t) __PMT ((_IO_FILE *FP, void *DATA, 140 _IO_size_t N)); 141#define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N) 142 143/* The 'seekoff' hook moves the stream position to a new position 144 relative to the start of the file (if DIR==0), the current position 145 (MODE==1), or the end of the file (MODE==2). 146 It matches the streambuf::seekoff virtual function. 147 It is also used for the ANSI fseek function. */ 148#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 149typedef _IO_off64_t (*_IO_seekoff_t) __PMT ((_IO_FILE *FP, _IO_off64_t OFF, 150 int DIR, int MODE)); 151#else 152typedef _IO_off_t (*_IO_seekoff_t) __PMT ((_IO_FILE *FP, _IO_off_t OFF, 153 int DIR, int MODE)); 154#endif 155#define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE) 156 157/* The 'seekpos' hook also moves the stream position, 158 but to an absolute position given by a fpos_t (seekpos). 159 It matches the streambuf::seekpos virtual function. 160 It is also used for the ANSI fgetpos and fsetpos functions. */ 161/* The _IO_seek_cur and _IO_seek_end options are not allowed. */ 162#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 163typedef _IO_off64_t (*_IO_seekpos_t) __PMT ((_IO_FILE *, _IO_off64_t, int)); 164#else 165typedef _IO_off_t (*_IO_seekpos_t) __PMT ((_IO_FILE *, _IO_off_t, int)); 166#endif 167#define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS) 168 169/* The 'setbuf' hook gives a buffer to the file. 170 It matches the streambuf::setbuf virtual function. */ 171typedef _IO_FILE* (*_IO_setbuf_t) __PMT ((_IO_FILE *, char *, _IO_ssize_t)); 172#define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH) 173 174/* The 'sync' hook attempts to synchronize the internal data structures 175 of the file with the external state. 176 It matches the streambuf::sync virtual function. */ 177typedef int (*_IO_sync_t) __PMT ((_IO_FILE *)); 178#define _IO_SYNC(FP) JUMP0 (__sync, FP) 179 180/* The 'doallocate' hook is used to tell the file to allocate a buffer. 181 It matches the streambuf::doallocate virtual function, which is not 182 in the ANSI/ISO C++ standard, but is part traditional implementations. */ 183typedef int (*_IO_doallocate_t) __PMT ((_IO_FILE *)); 184#define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP) 185 186/* The following four hooks (sysread, syswrite, sysclose, sysseek, and 187 sysstat) are low-level hooks specific to this implementation. 188 There is no correspondence in the ANSI/ISO C++ standard library. 189 The hooks basically correspond to the Unix system functions 190 (read, write, close, lseek, and stat) except that a _IO_FILE* 191 parameter is used instead of a integer file descriptor; the default 192 implementation used for normal files just calls those functions. 193 The advantage of overriding these functions instead of the higher-level 194 ones (underflow, overflow etc) is that you can leave all the buffering 195 higher-level functions. */ 196 197/* The 'sysread' hook is used to read data from the external file into 198 an existing buffer. It generalizes the Unix read(2) function. 199 It matches the streambuf::sys_read virtual function, which is 200 specific to this implementation. */ 201typedef _IO_ssize_t (*_IO_read_t) __PMT ((_IO_FILE *, void *, _IO_ssize_t)); 202#define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN) 203 204/* The 'syswrite' hook is used to write data from an existing buffer 205 to an external file. It generalizes the Unix write(2) function. 206 It matches the streambuf::sys_write virtual function, which is 207 specific to this implementation. */ 208typedef _IO_ssize_t (*_IO_write_t) __PMT ((_IO_FILE *,const void *,_IO_ssize_t)); 209#define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN) 210 211/* The 'sysseek' hook is used to re-position an external file. 212 It generalizes the Unix lseek(2) function. 213 It matches the streambuf::sys_seek virtual function, which is 214 specific to this implementation. */ 215#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 216typedef _IO_off64_t (*_IO_seek_t) __PMT ((_IO_FILE *, _IO_off64_t, int)); 217#else 218typedef _IO_off_t (*_IO_seek_t) __PMT ((_IO_FILE *, _IO_off_t, int)); 219#endif 220#define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE) 221 222/* The 'sysclose' hook is used to finalize (close, finish up) an 223 external file. It generalizes the Unix close(2) function. 224 It matches the streambuf::sys_close virtual function, which is 225 specific to this implementation. */ 226typedef int (*_IO_close_t) __PMT ((_IO_FILE *)); /* finalize */ 227#define _IO_SYSCLOSE(FP) JUMP0 (__close, FP) 228 229/* The 'sysstat' hook is used to get information about an external file 230 into a struct stat buffer. It generalizes the Unix fstat(2) call. 231 It matches the streambuf::sys_stat virtual function, which is 232 specific to this implementation. */ 233typedef int (*_IO_stat_t) __PMT ((_IO_FILE *, void *)); 234#define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF) 235 236#if _G_IO_IO_FILE_VERSION == 0x20001 237/* The 'showmany' hook can be used to get an image how much input is 238 available. In many cases the answer will be 0 which means unknown 239 but some cases one can provide real information. */ 240typedef int (*_IO_showmanyc_t) __PMT ((_IO_FILE *)); 241#define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP) 242 243/* The 'imbue' hook is used to get information about the currently 244 installed locales. */ 245typedef void (*_IO_imbue_t) __PMT ((_IO_FILE *, void *)); 246#define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE) 247#endif 248 249 250#define _IO_CHAR_TYPE char /* unsigned char ? */ 251#define _IO_INT_TYPE int 252 253struct _IO_jump_t 254{ 255 JUMP_FIELD(_G_size_t, __dummy); 256#ifdef _G_USING_THUNKS 257 JUMP_FIELD(_G_size_t, __dummy2); 258#endif 259 JUMP_FIELD(_IO_finish_t, __finish); 260 JUMP_FIELD(_IO_overflow_t, __overflow); 261 JUMP_FIELD(_IO_underflow_t, __underflow); 262 JUMP_FIELD(_IO_underflow_t, __uflow); 263 JUMP_FIELD(_IO_pbackfail_t, __pbackfail); 264 /* showmany */ 265 JUMP_FIELD(_IO_xsputn_t, __xsputn); 266 JUMP_FIELD(_IO_xsgetn_t, __xsgetn); 267 JUMP_FIELD(_IO_seekoff_t, __seekoff); 268 JUMP_FIELD(_IO_seekpos_t, __seekpos); 269 JUMP_FIELD(_IO_setbuf_t, __setbuf); 270 JUMP_FIELD(_IO_sync_t, __sync); 271 JUMP_FIELD(_IO_doallocate_t, __doallocate); 272 JUMP_FIELD(_IO_read_t, __read); 273 JUMP_FIELD(_IO_write_t, __write); 274 JUMP_FIELD(_IO_seek_t, __seek); 275 JUMP_FIELD(_IO_close_t, __close); 276 JUMP_FIELD(_IO_stat_t, __stat); 277#if _G_IO_IO_FILE_VERSION == 0x20001 278 JUMP_FIELD(_IO_showmanyc_t, __showmanyc); 279 JUMP_FIELD(_IO_imbue_t, __imbue); 280#endif 281#if 0 282 get_column; 283 set_column; 284#endif 285}; 286 287/* We always allocate an extra word following an _IO_FILE. 288 This contains a pointer to the function jump table used. 289 This is for compatibility with C++ streambuf; the word can 290 be used to smash to a pointer to a virtual function table. */ 291 292struct _IO_FILE_plus 293{ 294 _IO_FILE file; 295 const struct _IO_jump_t *vtable; 296}; 297 298/* Generic functions */ 299 300#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 301extern _IO_off64_t _IO_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int)); 302extern _IO_off64_t _IO_seekpos __P ((_IO_FILE *, _IO_off64_t, int)); 303#else 304extern _IO_off_t _IO_seekoff __P ((_IO_FILE *, _IO_off_t, int, int)); 305extern _IO_off_t _IO_seekpos __P ((_IO_FILE *, _IO_off_t, int)); 306#endif 307 308extern void _IO_switch_to_main_get_area __P ((_IO_FILE *)); 309extern void _IO_switch_to_backup_area __P ((_IO_FILE *)); 310extern int _IO_switch_to_get_mode __P ((_IO_FILE *)); 311extern void _IO_init __P ((_IO_FILE *, int)); 312extern int _IO_sputbackc __P ((_IO_FILE *, int)); 313extern int _IO_sungetc __P ((_IO_FILE *)); 314extern void _IO_un_link __P ((_IO_FILE *)); 315extern void _IO_link_in __P ((_IO_FILE *)); 316extern void _IO_doallocbuf __P ((_IO_FILE *)); 317extern void _IO_unsave_markers __P ((_IO_FILE *)); 318extern void _IO_setb __P ((_IO_FILE *, char *, char *, int)); 319extern unsigned _IO_adjust_column __P ((unsigned, const char *, int)); 320#define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n) 321 322/* Marker-related function. */ 323 324extern void _IO_init_marker __P ((struct _IO_marker *, _IO_FILE *)); 325extern void _IO_remove_marker __P ((struct _IO_marker *)); 326extern int _IO_marker_difference __P ((struct _IO_marker *, 327 struct _IO_marker *)); 328extern int _IO_marker_delta __P ((struct _IO_marker *)); 329extern int _IO_seekmark __P ((_IO_FILE *, struct _IO_marker *, int)); 330 331/* Default jumptable functions. */ 332 333extern int _IO_default_underflow __P ((_IO_FILE *)); 334extern int _IO_default_uflow __P ((_IO_FILE *)); 335extern int _IO_default_doallocate __P ((_IO_FILE *)); 336extern void _IO_default_finish __P ((_IO_FILE *, int)); 337extern int _IO_default_pbackfail __P ((_IO_FILE *, int)); 338extern _IO_FILE* _IO_default_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t)); 339extern _IO_size_t _IO_default_xsputn __P ((_IO_FILE *, const void *, 340 _IO_size_t)); 341extern _IO_size_t _IO_default_xsgetn __P ((_IO_FILE *, void *, _IO_size_t)); 342#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 343extern _IO_off64_t _IO_default_seekoff __P ((_IO_FILE *, 344 _IO_off64_t, int, int)); 345extern _IO_off64_t _IO_default_seekpos __P ((_IO_FILE *, 346 _IO_off64_t, int)); 347#else 348extern _IO_off_t _IO_default_seekoff __P ((_IO_FILE *, _IO_off_t, int, int)); 349extern _IO_off_t _IO_default_seekpos __P ((_IO_FILE *, _IO_off_t, int)); 350#endif 351extern _IO_ssize_t _IO_default_write __P ((_IO_FILE *, const void *, 352 _IO_ssize_t)); 353extern _IO_ssize_t _IO_default_read __P ((_IO_FILE *, void *, _IO_ssize_t)); 354extern int _IO_default_stat __P ((_IO_FILE *, void *)); 355#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 356extern _IO_off64_t _IO_default_seek __P ((_IO_FILE *, _IO_off64_t, int)); 357#else 358extern _IO_off_t _IO_default_seek __P ((_IO_FILE *, _IO_off_t, int)); 359#endif 360extern int _IO_default_sync __P ((_IO_FILE *)); 361#define _IO_default_close ((_IO_close_t) _IO_default_sync) 362 363extern struct _IO_jump_t _IO_file_jumps; 364extern struct _IO_jump_t _IO_streambuf_jumps; 365extern struct _IO_jump_t _IO_proc_jumps; 366extern struct _IO_jump_t _IO_str_jumps; 367extern int _IO_do_write __P ((_IO_FILE *, const char *, _IO_size_t)); 368extern int _IO_flush_all __P ((void)); 369extern void _IO_cleanup __P ((void)); 370extern void _IO_flush_all_linebuffered __P ((void)); 371 372#define _IO_do_flush(_f) \ 373 _IO_do_write(_f, (_f)->_IO_write_base, \ 374 (_f)->_IO_write_ptr-(_f)->_IO_write_base) 375#define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING) 376#define _IO_mask_flags(fp, f, mask) \ 377 ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask))) 378#define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\ 379 (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg)) 380#define _IO_setp(__fp, __p, __ep) \ 381 ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep)) 382#define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL) 383#define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP) 384#define _IO_have_markers(fp) ((fp)->_markers != NULL) 385#define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base) 386 387/* Jumptable functions for files. */ 388 389extern int _IO_file_doallocate __P ((_IO_FILE *)); 390extern _IO_FILE* _IO_file_setbuf __P ((_IO_FILE *, char *, _IO_ssize_t)); 391#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 392extern _IO_off64_t _IO_file_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int)); 393extern _IO_off64_t _IO_file_seek __P ((_IO_FILE *, _IO_off64_t, int)); 394#else 395extern _IO_off_t _IO_file_seekoff __P ((_IO_FILE *, _IO_off_t, int, int)); 396extern _IO_off_t _IO_file_seek __P ((_IO_FILE *, _IO_off_t, int)); 397#endif 398extern _IO_size_t _IO_file_xsputn __P ((_IO_FILE *, const void *, _IO_size_t)); 399extern int _IO_file_stat __P ((_IO_FILE *, void *)); 400extern int _IO_file_close __P ((_IO_FILE *)); 401extern int _IO_file_underflow __P ((_IO_FILE *)); 402extern int _IO_file_overflow __P ((_IO_FILE *, int)); 403#define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0) 404extern void _IO_file_init __P ((_IO_FILE *)); 405extern _IO_FILE* _IO_file_attach __P ((_IO_FILE *, int)); 406extern _IO_FILE* _IO_file_open __P ((_IO_FILE *, const char *, int, int, 407 int, int)); 408#if _G_IO_IO_FILE_VERSION == 0x20001 409extern _IO_FILE* _IO_file_fopen __P ((_IO_FILE *, const char *, const char *, 410 int)); 411#else 412extern _IO_FILE* _IO_file_fopen __P ((_IO_FILE *, const char *, const char *)); 413#endif 414extern _IO_ssize_t _IO_file_write __P ((_IO_FILE *, const void *, 415 _IO_ssize_t)); 416extern _IO_ssize_t _IO_file_read __P ((_IO_FILE *, void *, _IO_ssize_t)); 417extern int _IO_file_sync __P ((_IO_FILE *)); 418extern int _IO_file_close_it __P ((_IO_FILE *)); 419extern void _IO_file_finish __P ((_IO_FILE *, int)); 420 421/* Jumptable functions for proc_files. */ 422extern _IO_FILE* _IO_proc_open __P ((_IO_FILE *, const char *, const char *)); 423extern int _IO_proc_close __P ((_IO_FILE *)); 424 425/* Jumptable functions for strfiles. */ 426extern int _IO_str_underflow __P ((_IO_FILE *)); 427extern int _IO_str_overflow __P ((_IO_FILE *, int)); 428extern int _IO_str_pbackfail __P ((_IO_FILE *, int)); 429#if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 430extern _IO_off64_t _IO_str_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int)); 431#else 432extern _IO_off_t _IO_str_seekoff __P ((_IO_FILE *, _IO_off_t, int, int)); 433#endif 434extern void _IO_str_finish __P ((_IO_FILE *, int)); 435 436/* Other strfile functions */ 437extern void _IO_str_init_static __P ((_IO_FILE *, char *, int, char *)); 438extern void _IO_str_init_readonly __P ((_IO_FILE *, const char *, int)); 439extern _IO_ssize_t _IO_str_count __P ((_IO_FILE *)); 440 441extern int _IO_vasprintf __P ((char **result_ptr, __const char *format, 442 _IO_va_list args)); 443extern int _IO_vdprintf __P ((int d, __const char *format, _IO_va_list arg)); 444extern int _IO_vsnprintf __P ((char *string, _IO_size_t maxlen, 445 __const char *format, _IO_va_list args)); 446 447 448extern _IO_size_t _IO_getline __P ((_IO_FILE *,char *, _IO_size_t, int, int)); 449extern _IO_size_t _IO_getline_info __P ((_IO_FILE *,char *, _IO_size_t, 450 int, int, int *)); 451extern _IO_ssize_t _IO_getdelim __P ((char **, _IO_size_t *, int, _IO_FILE *)); 452extern double _IO_strtod __P ((const char *, char **)); 453extern char *_IO_dtoa __P ((double __d, int __mode, int __ndigits, 454 int *__decpt, int *__sign, char **__rve)); 455extern int _IO_outfloat __P ((double __value, _IO_FILE *__sb, int __type, 456 int __width, int __precision, int __flags, 457 int __sign_mode, int __fill)); 458 459extern _IO_FILE *_IO_list_all; 460extern void (*_IO_cleanup_registration_needed) __PMT ((void)); 461 462#ifndef EOF 463# define EOF (-1) 464#endif 465#ifndef NULL 466# if defined __GNUG__ && \ 467 (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) 468# define NULL (__null) 469# else 470# if !defined(__cplusplus) 471# define NULL ((void*)0) 472# else 473# define NULL (0) 474# endif 475# endif 476#endif 477 478#if _G_HAVE_MMAP 479 480# include <unistd.h> 481# include <fcntl.h> 482# include <sys/mman.h> 483# include <sys/param.h> 484 485# if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) 486# define MAP_ANONYMOUS MAP_ANON 487# endif 488 489# if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE) 490# undef _G_HAVE_MMAP 491# define _G_HAVE_MMAP 0 492# endif 493 494#endif /* _G_HAVE_MMAP */ 495 496#if _G_HAVE_MMAP 497 498# ifdef _LIBC 499/* When using this code in the GNU libc we must not pollute the name space. */ 500# define mmap __mmap 501# define munmap __munmap 502# endif 503 504# define ROUND_TO_PAGE(_S) \ 505 (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1)) 506 507# define FREE_BUF(_B, _S) \ 508 munmap ((_B), ROUND_TO_PAGE (_S)) 509# define ALLOC_BUF(_B, _S, _R) \ 510 do { \ 511 (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S), \ 512 PROT_READ | PROT_WRITE, \ 513 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ 514 if ((_B) == (char *) -1) \ 515 return (_R); \ 516 } while (0) 517 518#else /* _G_HAVE_MMAP */ 519 520# define FREE_BUF(_B, _S) \ 521 free(_B) 522# define ALLOC_BUF(_B, _S, _R) \ 523 do { \ 524 (_B) = (char*)malloc(_S); \ 525 if ((_B) == NULL) \ 526 return (_R); \ 527 } while (0) 528 529#endif /* _G_HAVE_MMAP */ 530 531#ifndef OS_FSTAT 532# define OS_FSTAT fstat 533#endif 534struct stat; 535extern _IO_ssize_t _IO_read __P ((int, void *, _IO_size_t)); 536extern _IO_ssize_t _IO_write __P ((int, const void *, _IO_size_t)); 537extern _IO_off_t _IO_lseek __P ((int, _IO_off_t, int)); 538extern int _IO_close __P ((int)); 539extern int _IO_fstat __P ((int, struct stat *)); 540extern int _IO_vscanf __P ((const char *, _IO_va_list)); 541 542/* Operations on _IO_fpos_t. 543 Normally, these are trivial, but we provide hooks for configurations 544 where an _IO_fpos_t is a struct. 545 Note that _IO_off_t must be an integral type. */ 546 547/* _IO_pos_BAD is an _IO_off_t value indicating error, unknown, or EOF. */ 548#ifndef _IO_pos_BAD 549# if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 550# define _IO_pos_BAD ((_IO_off64_t) -1) 551# else 552# define _IO_pos_BAD ((_IO_off_t) -1) 553# endif 554#endif 555/* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */ 556#ifndef _IO_pos_as_off 557# if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 558# define _IO_pos_as_off(__pos) ((_IO_off64_t) (__pos)) 559# else 560# define _IO_pos_as_off(__pos) ((_IO_off_t) (__pos)) 561# endif 562#endif 563/* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */ 564#ifndef _IO_pos_adjust 565# define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta)) 566#endif 567/* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */ 568#ifndef _IO_pos_0 569# if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 570# define _IO_pos_0 ((_IO_fpos64_t) 0) 571# else 572# define _IO_pos_0 ((_IO_fpos_t) 0) 573# endif 574#endif 575 576#ifdef __cplusplus 577} 578#endif 579 580#ifdef _IO_MTSAFE_IO 581/* check following! */ 582# define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \ 583 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ 584 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD, \ 585 0, 0, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock } 586#else 587/* check following! */ 588# define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \ 589 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ 590 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD } 591#endif 592 593/* VTABLE_LABEL defines NAME as of the CLASS class. 594 CNLENGTH is strlen(#CLASS). */ 595#ifdef __GNUC__ 596# if _G_VTABLE_LABEL_HAS_LENGTH 597# define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \ 598 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS); 599# else 600# define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \ 601 extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS); 602# endif 603#endif /* __GNUC__ */ 604 605#if !defined(builtinbuf_vtable) && defined(__cplusplus) 606# ifdef __GNUC__ 607VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10) 608# else 609# if _G_VTABLE_LABEL_HAS_LENGTH 610# define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf 611# else 612# define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf 613# endif 614# endif 615#endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */ 616 617#if defined(__STDC__) || defined(__cplusplus) 618# define _IO_va_start(args, last) va_start(args, last) 619#else 620# define _IO_va_start(args, last) va_start(args) 621#endif 622 623extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf; 624 625#if 1 626# define COERCE_FILE(FILE) /* Nothing */ 627#else 628/* This is part of the kludge for binary compatibility with old stdio. */ 629# define COERCE_FILE(FILE) \ 630 (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \ 631 && (FILE) = *(FILE**)&((int*)fp)[1]) 632#endif 633 634#ifdef EINVAL 635# define MAYBE_SET_EINVAL __set_errno (EINVAL) 636#else 637# define MAYBE_SET_EINVAL /* nothing */ 638#endif 639 640#ifdef IO_DEBUG 641# define CHECK_FILE(FILE, RET) \ 642 if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \ 643 else { COERCE_FILE(FILE); \ 644 if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \ 645 { MAYBE_SET_EINVAL; return RET; }} 646#else 647# define CHECK_FILE(FILE, RET) COERCE_FILE (FILE) 648#endif 649