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   // Need to instantiate base class here for type-info bits, etc
  40   template struct __basic_file_base<char>;
  41   template struct __basic_file_base<wchar_t>;
  42
  43   // Generic definitions for __basic_file
  44   template<typename _CharT>
  45     int
  46     __basic_file<_CharT>::get_fileno(void)
  47     { return _fileno; }
  48
  49   template<typename _CharT>
  50     __basic_file<_CharT>::~__basic_file()
  51     { _IO_file_finish(this, 0); }
  52
  53   template<typename _CharT>
  54     void
  55     __basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
  56                                        int& __p_mode, int& __rw_mode)
  57     {
  58 #ifdef O_BINARY
  59       bool __testb = __mode & ios_base::binary;
  60 #endif
  61       bool __testi = __mode & ios_base::in;
  62       bool __testo = __mode & ios_base::out;
  63       bool __testt = __mode & ios_base::trunc;
  64       bool __testa = __mode & ios_base::app;
  65
  66       if (!__testi && __testo && !__testt && !__testa)
  67         {
  68           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
  69           __rw_mode = _IO_NO_READS;
  70         }
  71       if (!__testi && __testo && !__testt && __testa)
  72         {
  73           __p_mode = O_WRONLY | O_APPEND | O_CREAT;
  74           __rw_mode = _IO_NO_READS | _IO_IS_APPENDING;
  75         }
  76       if (!__testi && __testo && __testt && !__testa)
  77         {
  78           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
  79           __rw_mode = _IO_NO_READS;
  80         }
  81       if (__testi && !__testo && !__testt && !__testa)
  82         {
  83           __p_mode = O_RDONLY;
  84           __rw_mode = _IO_NO_WRITES;
  85         }
  86       if (__testi && __testo && !__testt && !__testa)
  87         {
  88           __p_mode = O_RDWR;
  89           __rw_mode = 0;
  90         }
  91       if (__testi && __testo && __testt && !__testa)
  92         {
  93           __p_mode = O_RDWR | O_TRUNC | O_CREAT;
  94           __rw_mode = 0;
  95         }
  96 #ifdef O_BINARY
  97       if (__testb)
  98         __p_mode |= O_BINARY;
  99 #endif
 100     }
 101
 102   template<typename _CharT>
 103     __basic_file<_CharT>*
 104     __basic_file<_CharT>::sys_open(int __fd, ios_base::openmode __mode)
 105     {
 106       __basic_file* __ret = NULL;
 107       int __p_mode = 0;
 108       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 109
 110       _M_open_mode(__mode, __p_mode, __rw_mode);
 111
 112       if (!_IO_file_is_open(this))
 113         {
 114           _fileno = __fd;
 115           _flags &= ~(_IO_NO_READS+_IO_NO_WRITES);
 116           _flags |= _IO_DELETE_DONT_CLOSE;
 117           _offset = _IO_pos_BAD;
 118           int __mask = _IO_NO_READS + _IO_NO_WRITES + _IO_IS_APPENDING;
 119           _IO_mask_flags(this, __rw_mode, __mask);
 120         }
 121
 122       return __ret;
 123     }
 124
 125   template<typename _CharT>
 126     __basic_file<_CharT>*
 127     __basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
 128                                int __prot = 0664)
 129     {
 130       __basic_file* __ret = NULL;
 131       int __p_mode = 0;
 132       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 133
 134       _M_open_mode(__mode, __p_mode, __rw_mode);
 135       if (!_IO_file_is_open(this))
 136         {
 137           __c_file_type* __f;
 138           __f = _IO_file_open(this, __name, __p_mode, __prot, __rw_mode, 0);
 139           __ret = __f ? this: NULL;
 140         }
 141       return __ret;
 142     }
 143
 144   template<typename _CharT>
 145     bool
 146     __basic_file<_CharT>::is_open() { return _fileno >= 0; }
 147
 148   template<typename _CharT>
 149     __basic_file<_CharT>*
 150     __basic_file<_CharT>::close()
 151     {
 152       return _IO_file_close_it(this) ? static_cast<__basic_file*>(NULL) : this;
 153     }
 154
 155   template<typename _CharT>
 156     streamsize
 157     __basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
 158     { return _IO_file_xsgetn(this, __s, __n); }
 159
 160   // NB: Unused.
 161   template<typename _CharT>
 162     streamsize
 163     __basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
 164     { return _IO_file_read(this, __s, __n); }
 165
 166   // NB: Unused.
 167   template<typename _CharT>
 168     streamsize
 169     __basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
 170     { return _IO_file_write(this, __s, __n); }
 171
 172   // NB: Unused.
 173   template<typename _CharT>
 174     streamoff
 175     __basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
 176     { return _IO_file_seek(this, __pos, __way); }
 177
 178   // NB: Unused.
 179   template<typename _CharT>
 180     int
 181     __basic_file<_CharT>::sys_close()
 182     { return _IO_file_close(this); }
 183
 184   // NB: Unused.
 185   template<typename _CharT>
 186     int
 187     __basic_file<_CharT>::sys_stat(void* __v)
 188     { return _IO_file_stat(this, __v); }
 189
 190   // NB: Unused.
 191   template<typename _CharT>
 192     int
 193     __basic_file<_CharT>::showmanyc() { return EOF; }
 194
 195   // NB: Unused.
 196   template<typename _CharT>
 197     void
 198     __basic_file<_CharT>::imbue(void* /*__v*/) { }
 199
 200   // __basic_file<char> definitions
 201   __basic_file<char>::__basic_file(__c_lock* __lock)
 202   {
 203 #ifdef _IO_MTSAFE_IO
 204     _lock = __lock;
 205 #endif
 206     // Don't set the orientation of the stream when initializing.
 207 #ifdef _GLIBCPP_USE_WCHAR_T
 208     _IO_no_init(this, 0, 0, &_M_wfile, 0);
 209 #else /* !defined(_GLIBCPP_USE_WCHAR_T) */
 210     _IO_no_init(this, 0, 0, NULL, 0);
 211 #endif /* !defined(_GLIBCPP_USE_WCHAR_T) */
 212     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_file_jumps;
 213     _IO_file_init((_IO_FILE_plus*)this);
 214   }
 215
 216   // NB: Unused.
 217   int
 218   __basic_file<char>::overflow(int __c)
 219   { return _IO_file_overflow(this, __c); }
 220
 221   // NB: Unused.
 222   int
 223   __basic_file<char>::underflow()
 224   { return _IO_file_underflow(this); }
 225
 226   // NB: Unused.
 227   int
 228   __basic_file<char>::uflow()
 229   { return _IO_default_uflow(this); }
 230
 231   // NB: Unused.
 232   int
 233   __basic_file<char>::pbackfail(int __c)
 234   { return _IO_default_pbackfail(this, __c); }
 235
 236   streamsize
 237   __basic_file<char>::xsputn(const char* __s, streamsize __n)
 238   { return _IO_file_xsputn(this, __s, __n); }
 239
 240   streamoff
 241   __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
 242                               ios_base::openmode __mode)
 243   { return _IO_file_seekoff(this, __off, __way, __mode); }
 244
 245   streamoff
 246   __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode)
 247   { return _IO_file_seekoff(this, __pos, ios_base::beg, __mode); }
 248
 249  // NB: Unused.
 250   streambuf*
 251   __basic_file<char>::setbuf(char* __b, int __len)
 252   { return (streambuf*) _IO_file_setbuf(this,__b, __len); }
 253
 254  int
 255   __basic_file<char>::sync()
 256   { return _IO_file_sync(this); }
 257
 258   // NB: Unused.
 259   int
 260   __basic_file<char>::doallocate()
 261   { return _IO_file_doallocate(this); }
 262
 263   template class __basic_file<char>;
 264
 265   // __basic_file<wchar_t> definitions
 266 #ifdef _GLIBCPP_USE_WCHAR_T
 267   __basic_file<wchar_t>::__basic_file(__c_lock* __lock)
 268   {
 269 #ifdef _IO_MTSAFE_IO
 270     _lock = __lock;
 271 #endif
 272     // Don't set the orientation of the stream when initializing.
 273     _IO_no_init(this, 0, 0, &_M_wfile, &_IO_wfile_jumps);
 274     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_wfile_jumps;
 275     _IO_file_init((_IO_FILE_plus*)this);
 276
 277     // In addition, need to allocate the buffer...
 278     _IO_wdoallocbuf(this);
 279     // Setup initial positions for this buffer...
 280     //    if (!(_flags & _IO_NO_READS))
 281     _IO_wsetg(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base,
 282               _wide_data->_IO_buf_base);
 283     //    if (!(_flags & _IO_NO_WRITES))
 284     _IO_wsetp(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base);
 285
 286     // Setup codecvt bits...
 287     _codecvt = &__c_libio_codecvt;
 288
 289     // Do the same for narrow bits...
 290     if (_IO_write_base == NULL)
 291       {
 292         _IO_doallocbuf(this);
 293         //      if (!(_flags & _IO_NO_READS))
 294         _IO_setg(this, _IO_buf_base, _IO_buf_base, _IO_buf_base);
 295         //    if (!(_flags & _IO_NO_WRITES))
 296         _IO_setp(this, _IO_buf_base, _IO_buf_base);
 297       }
 298   }
 299
 300  int
 301   __basic_file<wchar_t>::overflow(int __c)
 302   { return _IO_wfile_overflow(this, __c); }
 303
 304   int
 305   __basic_file<wchar_t>::underflow()
 306   { return _IO_wfile_underflow(this); }
 307
 308   // NB: Unused.
 309   int
 310   __basic_file<wchar_t>::uflow()
 311   { return _IO_wdefault_uflow(this); }
 312
 313   // NB: Unused.
 314   int
 315   __basic_file<wchar_t>::pbackfail(int __c)
 316   { return _IO_wdefault_pbackfail(this, __c); }
 317
 318   streamsize
 319   __basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n)
 320   { return _IO_wfile_xsputn(this, __s, __n); }
 321
 322   streamoff
 323   __basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
 324                                  ios_base::openmode __mode)
 325   { return _IO_wfile_seekoff(this, __off, __way, __mode); }
 326
 327   streamoff
 328   __basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode)
 329   { return _IO_wfile_seekoff(this, __pos, ios_base::beg, __mode); }
 330
 331    streambuf*
 332   __basic_file<wchar_t>::setbuf(wchar_t* __b, int __len)
 333   { return (streambuf*) _IO_wfile_setbuf(this,__b, __len); }
 334
 335    int
 336   __basic_file<wchar_t>::sync()
 337   { return _IO_wfile_sync(this); }
 338
 339   int
 340   __basic_file<wchar_t>::doallocate()
 341   { return _IO_wfile_doallocate(this); }
 342
 343   template class __basic_file<wchar_t>;
 344 #endif
 345
 346 }  // namespace std
 347
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