src/common/wfstream.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        fstream.cpp
   3 // Purpose:     "File stream" classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     11/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "wfstream.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20   #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_STREAMS
  24
  25 #include <stdio.h>
  26 #include "wx/stream.h"
  27 #include "wx/wfstream.h"
  28
  29 #if wxUSE_FILE
  30
  31 // ----------------------------------------------------------------------------
  32 // wxFileInputStream
  33 // ----------------------------------------------------------------------------
  34
  35 wxFileInputStream::wxFileInputStream(const wxString& fileName)
  36   : wxInputStream()
  37 {
  38     m_file = new wxFile(fileName, wxFile::read);
  39     m_file_destroy = true;
  40     if ( !m_file->IsOpened() )
  41         m_lasterror = wxSTREAM_READ_ERROR;
  42 }
  43
  44 wxFileInputStream::wxFileInputStream()
  45   : wxInputStream()
  46 {
  47     m_file_destroy = false;
  48     m_file = NULL;
  49 }
  50
  51 wxFileInputStream::wxFileInputStream(wxFile& file)
  52 {
  53     m_file = &file;
  54     m_file_destroy = false;
  55 }
  56
  57 wxFileInputStream::wxFileInputStream(int fd)
  58 {
  59     m_file = new wxFile(fd);
  60     m_file_destroy = true;
  61 }
  62
  63 wxFileInputStream::~wxFileInputStream()
  64 {
  65     if (m_file_destroy)
  66         delete m_file;
  67 }
  68
  69 wxFileOffset wxFileInputStream::GetLength() const
  70 {
  71     return m_file->Length();
  72 }
  73
  74 size_t wxFileInputStream::OnSysRead(void *buffer, size_t size)
  75 {
  76     ssize_t ret = m_file->Read(buffer, size);
  77
  78     // NB: we can't use a switch here because HP-UX CC doesn't allow
  79     //     switching over long long (which size_t is in 64bit mode)
  80
  81     if ( !ret )
  82     {
  83         // nothing read, so nothing more to read
  84         m_lasterror = wxSTREAM_EOF;
  85     }
  86     else if ( ret == wxInvalidOffset )
  87     {
  88         m_lasterror = wxSTREAM_READ_ERROR;
  89         ret = 0;
  90     }
  91     else
  92     {
  93         // normal case
  94         m_lasterror = wxSTREAM_NO_ERROR;
  95     }
  96
  97     return ret;
  98 }
  99
 100 wxFileOffset wxFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 101 {
 102     return m_file->Seek(pos, mode);
 103 }
 104
 105 wxFileOffset wxFileInputStream::OnSysTell() const
 106 {
 107     return m_file->Tell();
 108 }
 109
 110 // ----------------------------------------------------------------------------
 111 // wxFileOutputStream
 112 // ----------------------------------------------------------------------------
 113
 114 wxFileOutputStream::wxFileOutputStream(const wxString& fileName)
 115 {
 116     m_file = new wxFile(fileName, wxFile::write);
 117     m_file_destroy = true;
 118
 119     if (!m_file->IsOpened())
 120         m_lasterror = wxSTREAM_WRITE_ERROR;
 121 }
 122
 123 wxFileOutputStream::wxFileOutputStream(wxFile& file)
 124 {
 125     m_file = &file;
 126     m_file_destroy = false;
 127 }
 128
 129 wxFileOutputStream::wxFileOutputStream()
 130                   : wxOutputStream()
 131 {
 132     m_file_destroy = false;
 133     m_file = NULL;
 134 }
 135
 136 wxFileOutputStream::wxFileOutputStream(int fd)
 137 {
 138     m_file = new wxFile(fd);
 139     m_file_destroy = true;
 140 }
 141
 142 wxFileOutputStream::~wxFileOutputStream()
 143 {
 144     if (m_file_destroy)
 145     {
 146         Sync();
 147         delete m_file;
 148     }
 149 }
 150
 151 size_t wxFileOutputStream::OnSysWrite(const void *buffer, size_t size)
 152 {
 153     size_t ret = m_file->Write(buffer, size);
 154
 155     m_lasterror = m_file->Error() ? wxSTREAM_WRITE_ERROR : wxSTREAM_NO_ERROR;
 156
 157     return ret;
 158 }
 159
 160 wxFileOffset wxFileOutputStream::OnSysTell() const
 161 {
 162     return m_file->Tell();
 163 }
 164
 165 wxFileOffset wxFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 166 {
 167     return m_file->Seek(pos, mode);
 168 }
 169
 170 void wxFileOutputStream::Sync()
 171 {
 172     wxOutputStream::Sync();
 173     m_file->Flush();
 174 }
 175
 176 wxFileOffset wxFileOutputStream::GetLength() const
 177 {
 178     return m_file->Length();
 179 }
 180
 181 // ----------------------------------------------------------------------------
 182 // wxTempFileOutputStream
 183 // ----------------------------------------------------------------------------
 184
 185 wxTempFileOutputStream::wxTempFileOutputStream(const wxString& fileName)
 186 {
 187     m_file = new wxTempFile(fileName);
 188
 189     if (!m_file->IsOpened())
 190         m_lasterror = wxSTREAM_WRITE_ERROR;
 191 }
 192
 193 wxTempFileOutputStream::~wxTempFileOutputStream()
 194 {
 195     if (m_file->IsOpened())
 196         Discard();
 197     delete m_file;
 198 }
 199
 200 size_t wxTempFileOutputStream::OnSysWrite(const void *buffer, size_t size)
 201 {
 202     if (IsOk() && m_file->Write(buffer, size))
 203         return size;
 204     m_lasterror = wxSTREAM_WRITE_ERROR;
 205     return 0;
 206 }
 207
 208 // ----------------------------------------------------------------------------
 209 // wxFileStream
 210 // ----------------------------------------------------------------------------
 211
 212 wxFileStream::wxFileStream(const wxString& fileName)
 213             : wxFileInputStream(fileName)
 214 {
 215     wxFileOutputStream::m_file = wxFileInputStream::m_file;
 216 }
 217
 218 #endif //wxUSE_FILE
 219
 220 #if wxUSE_FFILE
 221
 222 // ----------------------------------------------------------------------------
 223 // wxFFileInputStream
 224 // ----------------------------------------------------------------------------
 225
 226 wxFFileInputStream::wxFFileInputStream(const wxString& fileName,
 227                                        const wxChar *mode)
 228                   : wxInputStream()
 229 {
 230     m_file = new wxFFile(fileName, mode);
 231     m_file_destroy = true;
 232 }
 233
 234 wxFFileInputStream::wxFFileInputStream()
 235                   : wxInputStream()
 236 {
 237     m_file = NULL;
 238     m_file_destroy = false;
 239 }
 240
 241 wxFFileInputStream::wxFFileInputStream(wxFFile& file)
 242 {
 243     m_file = &file;
 244     m_file_destroy = false;
 245 }
 246
 247 wxFFileInputStream::wxFFileInputStream(FILE *file)
 248 {
 249     m_file = new wxFFile(file);
 250     m_file_destroy = true;
 251 }
 252
 253 wxFFileInputStream::~wxFFileInputStream()
 254 {
 255     if (m_file_destroy)
 256         delete m_file;
 257 }
 258
 259 wxFileOffset wxFFileInputStream::GetLength() const
 260 {
 261     return m_file->Length();
 262 }
 263
 264 size_t wxFFileInputStream::OnSysRead(void *buffer, size_t size)
 265 {
 266     ssize_t ret = m_file->Read(buffer, size);
 267
 268     // It is not safe to call Eof() if the file is not opened.
 269     if (!m_file->IsOpened() || m_file->Eof())
 270         m_lasterror = wxSTREAM_EOF;
 271     if (ret == wxInvalidOffset)
 272     {
 273         m_lasterror = wxSTREAM_READ_ERROR;
 274         ret = 0;
 275     }
 276
 277     return ret;
 278 }
 279
 280 wxFileOffset wxFFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 281 {
 282     return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset;
 283 }
 284
 285 wxFileOffset wxFFileInputStream::OnSysTell() const
 286 {
 287     return m_file->Tell();
 288 }
 289
 290 // ----------------------------------------------------------------------------
 291 // wxFFileOutputStream
 292 // ----------------------------------------------------------------------------
 293
 294 wxFFileOutputStream::wxFFileOutputStream(const wxString& fileName,
 295                                          const wxChar *mode)
 296 {
 297     m_file = new wxFFile(fileName, mode);
 298     m_file_destroy = true;
 299
 300     if (!m_file->IsOpened())
 301     {
 302         m_lasterror = wxSTREAM_WRITE_ERROR;
 303     }
 304     else
 305     {
 306         if (m_file->Error())
 307             m_lasterror = wxSTREAM_WRITE_ERROR;
 308     }
 309 }
 310
 311 wxFFileOutputStream::wxFFileOutputStream(wxFFile& file)
 312 {
 313     m_file = &file;
 314     m_file_destroy = false;
 315 }
 316
 317 wxFFileOutputStream::wxFFileOutputStream()
 318                    : wxOutputStream()
 319 {
 320     m_file = NULL;
 321     m_file_destroy = false;
 322 }
 323
 324 wxFFileOutputStream::wxFFileOutputStream(FILE *file)
 325 {
 326     m_file = new wxFFile(file);
 327     m_file_destroy = true;
 328 }
 329
 330 wxFFileOutputStream::~wxFFileOutputStream()
 331 {
 332     if (m_file_destroy)
 333     {
 334         Sync();
 335         delete m_file;
 336     }
 337 }
 338
 339 size_t wxFFileOutputStream::OnSysWrite(const void *buffer, size_t size)
 340 {
 341     size_t ret = m_file->Write(buffer, size);
 342     // It is not safe to call Error() if the file is not opened.
 343     if (!m_file->IsOpened() || m_file->Error())
 344         m_lasterror = wxSTREAM_WRITE_ERROR;
 345     else
 346         m_lasterror = wxSTREAM_NO_ERROR;
 347     return ret;
 348 }
 349
 350 wxFileOffset wxFFileOutputStream::OnSysTell() const
 351 {
 352     return m_file->Tell();
 353 }
 354
 355 wxFileOffset wxFFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 356 {
 357     return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset;
 358 }
 359
 360 void wxFFileOutputStream::Sync()
 361 {
 362     wxOutputStream::Sync();
 363     m_file->Flush();
 364 }
 365
 366 wxFileOffset wxFFileOutputStream::GetLength() const
 367 {
 368     return m_file->Length();
 369 }
 370
 371 // ----------------------------------------------------------------------------
 372 // wxFFileStream
 373 // ----------------------------------------------------------------------------
 374
 375 wxFFileStream::wxFFileStream(const wxString& fileName)
 376              : wxFFileInputStream(fileName)
 377 {
 378     wxFFileOutputStream::m_file = wxFFileInputStream::m_file;
 379 }
 380
 381 #endif //wxUSE_FFILE
 382
 383 #endif // wxUSE_STREAMS
 384