libstdc++-v3/config/c_io_libio.cc

   1 // Wrapper of C-language FILE struct -*- C++ -*-
   2
   3 // Copyright (C) 2000 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 27.8  File-based streams
  32 //
  33
  34 #include <bits/basic_file.h>
  35 #include <libioP.h>
  36
  37 namespace std {
  38
  39   // __basic_file<char> specializations
  40   template<>
  41     __basic_file<char>::__basic_file(__c_lock* __lock);
  42
  43   template<>
  44     int
  45     __basic_file<char>::overflow(int __c);
  46
  47   template<>
  48     int
  49     __basic_file<char>::underflow();
  50
  51   template<>
  52     int
  53     __basic_file<char>::uflow();
  54
  55   template<>
  56     int
  57     __basic_file<char>::pbackfail(int __c);
  58
  59   template<>
  60     streamsize
  61     __basic_file<char>::xsputn(const char* __s, streamsize __n);
  62
  63   template<>
  64     streamoff
  65     __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
  66                                 ios_base::openmode __mode);
  67
  68   template<>
  69     streamoff
  70     __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode);
  71
  72   template<>
  73     streambuf*
  74     __basic_file<char>::setbuf(char* __b, int __len);
  75
  76   template<>
  77     int
  78     __basic_file<char>::sync();
  79
  80   template<>
  81     int
  82     __basic_file<char>::doallocate();
  83
  84   // __basic_file<wchar_t> specializations
  85 #ifdef _GLIBCPP_USE_WCHAR_T
  86   template<>
  87     __basic_file<wchar_t>::__basic_file(__c_lock* __lock);
  88
  89   template<>
  90     int
  91     __basic_file<wchar_t>::overflow(int __c);
  92
  93   template<>
  94     int
  95     __basic_file<wchar_t>::underflow();
  96
  97   template<>
  98     int
  99     __basic_file<wchar_t>::uflow();
 100
 101   template<>
 102     int
 103     __basic_file<wchar_t>::pbackfail(int __c);
 104
 105   template<>
 106     streamsize
 107     __basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n);
 108
 109   template<>
 110     streamoff
 111     __basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
 112                                 ios_base::openmode __mode);
 113
 114   template<>
 115     streamoff
 116     __basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode);
 117
 118   template<>
 119     streambuf*
 120     __basic_file<wchar_t>::setbuf(wchar_t* __b, int __len);
 121
 122   template<>
 123     int
 124     __basic_file<wchar_t>::sync();
 125
 126   template<>
 127     int
 128     __basic_file<wchar_t>::doallocate();
 129 #endif
 130
 131   // Generic definitions for __basic_file
 132   template<typename _CharT>
 133     int
 134     __basic_file<_CharT>::get_fileno(void)
 135     { return _fileno; }
 136
 137   template<typename _CharT>
 138     __basic_file<_CharT>::~__basic_file()
 139     { _IO_file_finish(this, 0); }
 140
 141   template<typename _CharT>
 142     void
 143     __basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
 144                                        int& __p_mode, int& __rw_mode,
 145                                        char* /*__c_mode*/)
 146     {
 147 #ifdef O_BINARY
 148       bool __testb = __mode & ios_base::binary;
 149 #endif
 150       bool __testi = __mode & ios_base::in;
 151       bool __testo = __mode & ios_base::out;
 152       bool __testt = __mode & ios_base::trunc;
 153       bool __testa = __mode & ios_base::app;
 154
 155       if (!__testi && __testo && !__testt && !__testa)
 156         {
 157           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
 158           __rw_mode = _IO_NO_READS;
 159         }
 160       if (!__testi && __testo && !__testt && __testa)
 161         {
 162           __p_mode = O_WRONLY | O_APPEND | O_CREAT;
 163           __rw_mode = _IO_NO_READS | _IO_IS_APPENDING;
 164         }
 165       if (!__testi && __testo && __testt && !__testa)
 166         {
 167           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
 168           __rw_mode = _IO_NO_READS;
 169         }
 170       if (__testi && !__testo && !__testt && !__testa)
 171         {
 172           __p_mode = O_RDONLY;
 173           __rw_mode = _IO_NO_WRITES;
 174         }
 175       if (__testi && __testo && !__testt && !__testa)
 176         {
 177           __p_mode = O_RDWR;
 178           __rw_mode = 0;
 179         }
 180       if (__testi && __testo && __testt && !__testa)
 181         {
 182           __p_mode = O_RDWR | O_TRUNC | O_CREAT;
 183           __rw_mode = 0;
 184         }
 185 #ifdef O_BINARY
 186       if (__testb)
 187         __p_mode |= O_BINARY;
 188 #endif
 189     }
 190
 191   template<typename _CharT>
 192     __basic_file<_CharT>*
 193     __basic_file<_CharT>::sys_open(int __fd, ios_base::openmode __mode)
 194     {
 195       __basic_file* __ret = NULL;
 196       int __p_mode = 0;
 197       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 198       char __c_mode[4];
 199
 200       _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
 201
 202       if (!_IO_file_is_open(this))
 203         {
 204           _fileno = __fd;
 205           _flags &= ~(_IO_NO_READS+_IO_NO_WRITES);
 206           _flags |= _IO_DELETE_DONT_CLOSE;
 207           _offset = _IO_pos_BAD;
 208           int __mask = _IO_NO_READS + _IO_NO_WRITES + _IO_IS_APPENDING;
 209           _IO_mask_flags(this, __rw_mode, __mask);
 210         }
 211
 212       return __ret;
 213     }
 214
 215   template<typename _CharT>
 216     __basic_file<_CharT>*
 217     __basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
 218                                int __prot)
 219     {
 220       __basic_file* __ret = NULL;
 221       int __p_mode = 0;
 222       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 223       char __c_mode[4];
 224
 225       _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
 226       if (!_IO_file_is_open(this))
 227         {
 228           __c_file_type* __f;
 229           __f = _IO_file_open(this, __name, __p_mode, __prot, __rw_mode, 0);
 230           __ret = __f ? this: NULL;
 231         }
 232       return __ret;
 233     }
 234
 235   template<typename _CharT>
 236     bool
 237     __basic_file<_CharT>::is_open() { return _fileno >= 0; }
 238
 239   template<typename _CharT>
 240     __basic_file<_CharT>*
 241     __basic_file<_CharT>::close()
 242     {
 243       return _IO_file_close_it(this) ? static_cast<__basic_file*>(NULL) : this;
 244     }
 245
 246   template<typename _CharT>
 247     streamsize
 248     __basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
 249     { return _IO_file_xsgetn(this, __s, __n); }
 250
 251   // NB: Unused.
 252   template<typename _CharT>
 253     streamsize
 254     __basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
 255     { return _IO_file_read(this, __s, __n); }
 256
 257   // NB: Unused.
 258   template<typename _CharT>
 259     streamsize
 260     __basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
 261     { return _IO_file_write(this, __s, __n); }
 262
 263   // NB: Unused.
 264   template<typename _CharT>
 265     streamoff
 266     __basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
 267     { return _IO_file_seek(this, __pos, __way); }
 268
 269   // NB: Unused.
 270   template<typename _CharT>
 271     int
 272     __basic_file<_CharT>::sys_close()
 273     { return _IO_file_close(this); }
 274
 275   // NB: Unused.
 276   template<typename _CharT>
 277     int
 278     __basic_file<_CharT>::sys_stat(void* __v)
 279     { return _IO_file_stat(this, __v); }
 280
 281   // NB: Unused.
 282   template<typename _CharT>
 283     int
 284     __basic_file<_CharT>::showmanyc() { return EOF; }
 285
 286   // NB: Unused.
 287   template<typename _CharT>
 288     void
 289     __basic_file<_CharT>::imbue(void* /*__v*/) { }
 290
 291   // __basic_file<char> definitions
 292   __basic_file<char>::__basic_file(__c_lock* __lock)
 293   {
 294 #ifdef _IO_MTSAFE_IO
 295     _lock = __lock;
 296 #endif
 297     // Don't set the orientation of the stream when initializing.
 298 #ifdef _GLIBCPP_USE_WCHAR_T
 299     _IO_no_init(this, 0, 0, &_M_wfile, 0);
 300 #else /* !defined(_GLIBCPP_USE_WCHAR_T) */
 301     _IO_no_init(this, 0, 0, NULL, 0);
 302 #endif /* !defined(_GLIBCPP_USE_WCHAR_T) */
 303     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_file_jumps;
 304     _IO_file_init((_IO_FILE_plus*)this);
 305   }
 306
 307   // NB: Unused.
 308   int
 309   __basic_file<char>::overflow(int __c)
 310   { return _IO_file_overflow(this, __c); }
 311
 312   // NB: Unused.
 313   int
 314   __basic_file<char>::underflow()
 315   { return _IO_file_underflow(this); }
 316
 317   // NB: Unused.
 318   int
 319   __basic_file<char>::uflow()
 320   { return _IO_default_uflow(this); }
 321
 322   // NB: Unused.
 323   int
 324   __basic_file<char>::pbackfail(int __c)
 325   { return _IO_default_pbackfail(this, __c); }
 326
 327   streamsize
 328   __basic_file<char>::xsputn(const char* __s, streamsize __n)
 329   { return _IO_file_xsputn(this, __s, __n); }
 330
 331   streamoff
 332   __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
 333                               ios_base::openmode __mode)
 334   { return _IO_file_seekoff(this, __off, __way, __mode); }
 335
 336   streamoff
 337   __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode)
 338   { return _IO_file_seekoff(this, __pos, ios_base::beg, __mode); }
 339
 340  // NB: Unused.
 341   streambuf*
 342   __basic_file<char>::setbuf(char* __b, int __len)
 343   { return (streambuf*) _IO_file_setbuf(this,__b, __len); }
 344
 345  int
 346   __basic_file<char>::sync()
 347   { return _IO_file_sync(this); }
 348
 349   // NB: Unused.
 350   int
 351   __basic_file<char>::doallocate()
 352   { return _IO_file_doallocate(this); }
 353
 354   // __basic_file<wchar_t> definitions
 355 #ifdef _GLIBCPP_USE_WCHAR_T
 356   __basic_file<wchar_t>::__basic_file(__c_lock* __lock)
 357   {
 358 #ifdef _IO_MTSAFE_IO
 359     _lock = __lock;
 360 #endif
 361     // Don't set the orientation of the stream when initializing.
 362     _IO_no_init(this, 0, 0, &_M_wfile, &_IO_wfile_jumps);
 363     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_wfile_jumps;
 364     _IO_file_init((_IO_FILE_plus*)this);
 365
 366     // In addition, need to allocate the buffer...
 367     _IO_wdoallocbuf(this);
 368     // Setup initial positions for this buffer...
 369     //    if (!(_flags & _IO_NO_READS))
 370     _IO_wsetg(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base,
 371               _wide_data->_IO_buf_base);
 372     //    if (!(_flags & _IO_NO_WRITES))
 373     _IO_wsetp(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base);
 374
 375     // Setup codecvt bits...
 376     _codecvt = &__c_libio_codecvt;
 377
 378     // Do the same for narrow bits...
 379     if (_IO_write_base == NULL)
 380       {
 381         _IO_doallocbuf(this);
 382         //      if (!(_flags & _IO_NO_READS))
 383         _IO_setg(this, _IO_buf_base, _IO_buf_base, _IO_buf_base);
 384         //    if (!(_flags & _IO_NO_WRITES))
 385         _IO_setp(this, _IO_buf_base, _IO_buf_base);
 386       }
 387   }
 388
 389  int
 390   __basic_file<wchar_t>::overflow(int __c)
 391   { return _IO_wfile_overflow(this, __c); }
 392
 393   int
 394   __basic_file<wchar_t>::underflow()
 395   { return _IO_wfile_underflow(this); }
 396
 397   // NB: Unused.
 398   int
 399   __basic_file<wchar_t>::uflow()
 400   { return _IO_wdefault_uflow(this); }
 401
 402   // NB: Unused.
 403   int
 404   __basic_file<wchar_t>::pbackfail(int __c)
 405   { return _IO_wdefault_pbackfail(this, __c); }
 406
 407   streamsize
 408   __basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n)
 409   { return _IO_wfile_xsputn(this, __s, __n); }
 410
 411   streamoff
 412   __basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
 413                                  ios_base::openmode __mode)
 414   { return _IO_wfile_seekoff(this, __off, __way, __mode); }
 415
 416   streamoff
 417   __basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode)
 418   { return _IO_wfile_seekoff(this, __pos, ios_base::beg, __mode); }
 419
 420    streambuf*
 421   __basic_file<wchar_t>::setbuf(wchar_t* __b, int __len)
 422   { return (streambuf*) _IO_wfile_setbuf(this,__b, __len); }
 423
 424    int
 425   __basic_file<wchar_t>::sync()
 426   { return _IO_wfile_sync(this); }
 427
 428   int
 429   __basic_file<wchar_t>::doallocate()
 430   { return _IO_wfile_doallocate(this); }
 431 #endif
 432
 433   // Need to instantiate base class here for type-info bits, etc
 434   template struct __basic_file_base<char>;
 435   template class __basic_file<char>;
 436 #ifdef _GLIBCPP_USE_WCHAR_T
 437   template struct __basic_file_base<wchar_t>;
 438   template class __basic_file<wchar_t>;
 439 #endif
 440 }  // namespace std
 441
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