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 #include <fcntl.h>              // Solaris needs for O_* macros
  37
  38 namespace std {
  39
  40   // Need to instantiate base class here for type-info bits, etc
  41   template struct __basic_file_base<char>;
  42   template struct __basic_file_base<wchar_t>;
  43
  44   // Generic definitions for __basic_file
  45   template<typename _CharT>
  46     int
  47     __basic_file<_CharT>::get_fileno(void)
  48     { return _fileno; }
  49
  50   template<typename _CharT>
  51     __basic_file<_CharT>::~__basic_file()
  52     { _IO_file_finish(this, 0); }
  53
  54   template<typename _CharT>
  55     void
  56     __basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
  57                                        int& __p_mode, int& __rw_mode)
  58     {
  59 #ifdef O_BINARY
  60       bool __testb = __mode & ios_base::binary;
  61 #endif
  62       bool __testi = __mode & ios_base::in;
  63       bool __testo = __mode & ios_base::out;
  64       bool __testt = __mode & ios_base::trunc;
  65       bool __testa = __mode & ios_base::app;
  66
  67       if (!__testi && __testo && !__testt && !__testa)
  68         {
  69           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
  70           __rw_mode = _IO_NO_READS;
  71         }
  72       if (!__testi && __testo && !__testt && __testa)
  73         {
  74           __p_mode = O_WRONLY | O_APPEND | O_CREAT;
  75           __rw_mode = _IO_NO_READS | _IO_IS_APPENDING;
  76         }
  77       if (!__testi && __testo && __testt && !__testa)
  78         {
  79           __p_mode = O_WRONLY | O_TRUNC | O_CREAT;
  80           __rw_mode = _IO_NO_READS;
  81         }
  82       if (__testi && !__testo && !__testt && !__testa)
  83         {
  84           __p_mode = O_RDONLY;
  85           __rw_mode = _IO_NO_WRITES;
  86         }
  87       if (__testi && __testo && !__testt && !__testa)
  88         {
  89           __p_mode = O_RDWR;
  90           __rw_mode = 0;
  91         }
  92       if (__testi && __testo && __testt && !__testa)
  93         {
  94           __p_mode = O_RDWR | O_TRUNC | O_CREAT;
  95           __rw_mode = 0;
  96         }
  97 #ifdef O_BINARY
  98       if (__testb)
  99         __p_mode |= O_BINARY;
 100 #endif
 101     }
 102
 103   template<typename _CharT>
 104     __basic_file<_CharT>*
 105     __basic_file<_CharT>::sys_open(int __fd, ios_base::openmode __mode)
 106     {
 107       __basic_file* __ret = NULL;
 108       int __p_mode = 0;
 109       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 110
 111       _M_open_mode(__mode, __p_mode, __rw_mode);
 112
 113       if (!_IO_file_is_open(this))
 114         {
 115           _fileno = __fd;
 116           _flags &= ~(_IO_NO_READS+_IO_NO_WRITES);
 117           _flags |= _IO_DELETE_DONT_CLOSE;
 118           _offset = _IO_pos_BAD;
 119           int __mask = _IO_NO_READS + _IO_NO_WRITES + _IO_IS_APPENDING;
 120           _IO_mask_flags(this, __rw_mode, __mask);
 121         }
 122
 123       return __ret;
 124     }
 125
 126   template<typename _CharT>
 127     __basic_file<_CharT>*
 128     __basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
 129                                int __prot = 0664)
 130     {
 131       __basic_file* __ret = NULL;
 132       int __p_mode = 0;
 133       int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
 134
 135       _M_open_mode(__mode, __p_mode, __rw_mode);
 136       if (!_IO_file_is_open(this))
 137         {
 138           __c_file_type* __f;
 139           __f = _IO_file_open(this, __name, __p_mode, __prot, __rw_mode, 0);
 140           __ret = __f ? this: NULL;
 141         }
 142       return __ret;
 143     }
 144
 145   template<typename _CharT>
 146     bool
 147     __basic_file<_CharT>::is_open() { return _fileno >= 0; }
 148
 149   template<typename _CharT>
 150     __basic_file<_CharT>*
 151     __basic_file<_CharT>::close()
 152     {
 153       return _IO_file_close_it(this) ? static_cast<__basic_file*>(NULL) : this;
 154     }
 155
 156   template<typename _CharT>
 157     streamsize
 158     __basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
 159     { return _IO_file_xsgetn(this, __s, __n); }
 160
 161   // NB: Unused.
 162   template<typename _CharT>
 163     streamsize
 164     __basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
 165     { return _IO_file_read(this, __s, __n); }
 166
 167   // NB: Unused.
 168   template<typename _CharT>
 169     streamsize
 170     __basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
 171     { return _IO_file_write(this, __s, __n); }
 172
 173   // NB: Unused.
 174   template<typename _CharT>
 175     streamoff
 176     __basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
 177     { return _IO_file_seek(this, __pos, __way); }
 178
 179   // NB: Unused.
 180   template<typename _CharT>
 181     int
 182     __basic_file<_CharT>::sys_close()
 183     { return _IO_file_close(this); }
 184
 185   // NB: Unused.
 186   template<typename _CharT>
 187     int
 188     __basic_file<_CharT>::sys_stat(void* __v)
 189     { return _IO_file_stat(this, __v); }
 190
 191   // NB: Unused.
 192   template<typename _CharT>
 193     int
 194     __basic_file<_CharT>::showmanyc() { return EOF; }
 195
 196   // NB: Unused.
 197   template<typename _CharT>
 198     void
 199     __basic_file<_CharT>::imbue(void* /*__v*/) { }
 200
 201   // __basic_file<char> definitions
 202   __basic_file<char>::__basic_file(__c_lock* __lock)
 203   {
 204 #ifdef _IO_MTSAFE_IO
 205     _lock = __lock;
 206 #endif
 207     // Don't set the orientation of the stream when initializing.
 208     _IO_no_init(this, 0, 0, &_M_wfile, 0);
 209     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_file_jumps;
 210     _IO_file_init((_IO_FILE_plus*)this);
 211   }
 212
 213   // NB: Unused.
 214   int
 215   __basic_file<char>::overflow(int __c)
 216   { return _IO_file_overflow(this, __c); }
 217
 218   // NB: Unused.
 219   int
 220   __basic_file<char>::underflow()
 221   { return _IO_file_underflow(this); }
 222
 223   // NB: Unused.
 224   int
 225   __basic_file<char>::uflow()
 226   { return _IO_default_uflow(this); }
 227
 228   // NB: Unused.
 229   int
 230   __basic_file<char>::pbackfail(int __c)
 231   { return _IO_default_pbackfail(this, __c); }
 232
 233   streamsize
 234   __basic_file<char>::xsputn(const char* __s, streamsize __n)
 235   { return _IO_file_xsputn(this, __s, __n); }
 236
 237   streamoff
 238   __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
 239                               ios_base::openmode __mode)
 240   { return _IO_file_seekoff(this, __off, __way, __mode); }
 241
 242   streamoff
 243   __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode)
 244   { return _IO_file_seekoff(this, __pos, ios_base::beg, __mode); }
 245
 246  // NB: Unused.
 247   streambuf*
 248   __basic_file<char>::setbuf(char* __b, int __len)
 249   { return (streambuf*) _IO_file_setbuf(this,__b, __len); }
 250
 251  int
 252   __basic_file<char>::sync()
 253   { return _IO_file_sync(this); }
 254
 255   // NB: Unused.
 256   int
 257   __basic_file<char>::doallocate()
 258   { return _IO_file_doallocate(this); }
 259
 260   template class __basic_file<char>;
 261
 262   // __basic_file<wchar_t> definitions
 263 #ifdef _GLIBCPP_USE_WCHAR_T
 264   __basic_file<wchar_t>::__basic_file(__c_lock* __lock)
 265   {
 266 #ifdef _IO_MTSAFE_IO
 267     _lock = __lock;
 268 #endif
 269     // Don't set the orientation of the stream when initializing.
 270     _IO_no_init(this, 0, 0, &_M_wfile, &_IO_wfile_jumps);
 271     _IO_JUMPS((_IO_FILE_plus *) this) = &_IO_wfile_jumps;
 272     _IO_file_init((_IO_FILE_plus*)this);
 273
 274     // In addition, need to allocate the buffer...
 275     _IO_wdoallocbuf(this);
 276     // Setup initial positions for this buffer...
 277     //    if (!(_flags & _IO_NO_READS))
 278     _IO_wsetg(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base,
 279               _wide_data->_IO_buf_base);
 280     //    if (!(_flags & _IO_NO_WRITES))
 281     _IO_wsetp(this, _wide_data->_IO_buf_base, _wide_data->_IO_buf_base);
 282
 283     // Setup codecvt bits...
 284     _codecvt = &__c_libio_codecvt;
 285
 286     // Do the same for narrow bits...
 287     if (_IO_write_base == NULL)
 288       {
 289         _IO_doallocbuf(this);
 290         //      if (!(_flags & _IO_NO_READS))
 291         _IO_setg(this, _IO_buf_base, _IO_buf_base, _IO_buf_base);
 292         //    if (!(_flags & _IO_NO_WRITES))
 293         _IO_setp(this, _IO_buf_base, _IO_buf_base);
 294       }
 295   }
 296
 297  int
 298   __basic_file<wchar_t>::overflow(int __c)
 299   { return _IO_wfile_overflow(this, __c); }
 300
 301   int
 302   __basic_file<wchar_t>::underflow()
 303   { return _IO_wfile_underflow(this); }
 304
 305   // NB: Unused.
 306   int
 307   __basic_file<wchar_t>::uflow()
 308   { return _IO_wdefault_uflow(this); }
 309
 310   // NB: Unused.
 311   int
 312   __basic_file<wchar_t>::pbackfail(int __c)
 313   { return _IO_wdefault_pbackfail(this, __c); }
 314
 315   streamsize
 316   __basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n)
 317   { return _IO_wfile_xsputn(this, __s, __n); }
 318
 319   streamoff
 320   __basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
 321                                  ios_base::openmode __mode)
 322   { return _IO_wfile_seekoff(this, __off, __way, __mode); }
 323
 324   streamoff
 325   __basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode)
 326   { return _IO_wfile_seekoff(this, __pos, ios_base::beg, __mode); }
 327
 328    streambuf*
 329   __basic_file<wchar_t>::setbuf(wchar_t* __b, int __len)
 330   { return (streambuf*) _IO_wfile_setbuf(this,__b, __len); }
 331
 332    int
 333   __basic_file<wchar_t>::sync()
 334   { return _IO_wfile_sync(this); }
 335
 336   int
 337   __basic_file<wchar_t>::doallocate()
 338   { return _IO_wfile_doallocate(this); }
 339
 340   template class __basic_file<wchar_t>;
 341 #endif
 342
 343 }  // namespace std
 344
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