src/common/stream.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        stream.cpp
   3 // Purpose:     wxStream base classes
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     11/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "stream.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 #ifndef WX_PRECOMP
  24   #include "wx/defs.h"
  25 #endif
  26
  27 #if wxUSE_STREAMS
  28
  29 #include <ctype.h>
  30 #include <wx/stream.h>
  31 #include <wx/datstrm.h>
  32 #include <wx/objstrm.h>
  33
  34 #define BUF_TEMP_SIZE 10000
  35
  36 // ----------------------------------------------------------------------------
  37 // wxStreamBuffer
  38 // ----------------------------------------------------------------------------
  39
  40 #define CHECK_ERROR(err) \
  41    if (m_stream->m_lasterror == wxStream_NOERROR) \
  42      m_stream->m_lasterror = err
  43
  44 wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
  45   : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
  46     m_buffer_size(0), m_wback(NULL), m_wbacksize(0), m_wbackcur(0),
  47     m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
  48     m_mode(mode), m_destroybuf(FALSE), m_destroystream(FALSE)
  49 {
  50 }
  51
  52 wxStreamBuffer::wxStreamBuffer(BufMode mode)
  53   : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
  54     m_buffer_size(0), m_wback(NULL), m_wbacksize(0), m_wbackcur(0),
  55     m_fixed(TRUE), m_flushable(FALSE), m_stream(NULL),
  56     m_mode(mode), m_destroybuf(FALSE), m_destroystream(TRUE)
  57 {
  58   m_stream = new wxStreamBase();
  59 }
  60
  61 wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
  62 {
  63   m_buffer_start = buffer.m_buffer_start;
  64   m_buffer_end = buffer.m_buffer_end;
  65   m_buffer_pos = buffer.m_buffer_pos;
  66   m_buffer_size = buffer.m_buffer_size;
  67   m_fixed = buffer.m_fixed;
  68   m_flushable = buffer.m_flushable;
  69   m_stream = buffer.m_stream;
  70   m_mode = buffer.m_mode;
  71   m_destroybuf = FALSE;
  72   m_destroystream = FALSE;
  73   m_wback = NULL;
  74   m_wbacksize = 0;
  75   m_wbackcur = 0;
  76 }
  77
  78 wxStreamBuffer::~wxStreamBuffer()
  79 {
  80   if (m_wback)
  81     free(m_wback);
  82   if (m_destroybuf)
  83     wxDELETEA(m_buffer_start);
  84   if (m_destroystream)
  85     delete m_stream;
  86 }
  87
  88 size_t wxStreamBuffer::WriteBack(const char *buf, size_t bufsize)
  89 {
  90   char *ptrback;
  91
  92   if (m_mode != read)
  93     return 0;
  94
  95   ptrback = AllocSpaceWBack(bufsize);
  96   if (!ptrback)
  97     return 0;
  98
  99   memcpy(ptrback, buf, bufsize);
 100   return bufsize;
 101 }
 102
 103 bool wxStreamBuffer::WriteBack(char c)
 104 {
 105   char *ptrback;
 106
 107   ptrback = AllocSpaceWBack(1);
 108   if (!ptrback)
 109     return FALSE;
 110
 111   *ptrback = c;
 112   return TRUE;
 113 }
 114
 115 void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
 116 {
 117   if (m_destroybuf)
 118     wxDELETEA(m_buffer_start);
 119   m_buffer_start = buffer_start;
 120   m_buffer_end   = buffer_end;
 121
 122   m_buffer_size = m_buffer_end-m_buffer_start;
 123   m_destroybuf = FALSE;
 124   ResetBuffer();
 125 }
 126
 127 void wxStreamBuffer::SetBufferIO(size_t bufsize)
 128 {
 129   char *b_start;
 130
 131   if (m_destroybuf)
 132     wxDELETEA(m_buffer_start);
 133
 134   if (!bufsize) {
 135     m_buffer_start = NULL;
 136     m_buffer_end = NULL;
 137     m_buffer_pos = NULL;
 138     m_buffer_size = 0;
 139     return;
 140   }
 141
 142   b_start = new char[bufsize];
 143   SetBufferIO(b_start, b_start + bufsize);
 144   m_destroybuf = TRUE;
 145 }
 146
 147 void wxStreamBuffer::ResetBuffer()
 148 {
 149   m_stream->m_lasterror = wxStream_NOERROR;
 150   m_stream->m_lastcount = 0;
 151   if (m_mode == read)
 152     m_buffer_pos = m_buffer_end;
 153   else
 154     m_buffer_pos = m_buffer_start;
 155 }
 156
 157 char *wxStreamBuffer::AllocSpaceWBack(size_t needed_size)
 158 {
 159   char *temp_b;
 160
 161   m_wbacksize += needed_size;
 162
 163   if (!m_wback)
 164     temp_b = (char *)malloc(m_wbacksize);
 165   else
 166     temp_b = (char *)realloc(m_wback, m_wbacksize);
 167
 168   if (!temp_b)
 169     return NULL;
 170   m_wback = temp_b;
 171
 172   return (char *)(m_wback+(m_wbacksize-needed_size));
 173 }
 174
 175 size_t wxStreamBuffer::GetWBack(char *buf, size_t bsize)
 176 {
 177   size_t s_toget = m_wbacksize-m_wbackcur;
 178
 179   if (bsize < s_toget)
 180     s_toget = bsize;
 181
 182   memcpy(buf, (m_wback+m_wbackcur), s_toget);
 183
 184   m_wbackcur += s_toget;
 185   if (m_wbackcur == m_wbacksize) {
 186     free(m_wback);
 187     m_wback = (char *)NULL;
 188     m_wbacksize = 0;
 189     m_wbackcur = 0;
 190   }
 191
 192   return s_toget;
 193 }
 194
 195 bool wxStreamBuffer::FillBuffer()
 196 {
 197   size_t count;
 198
 199   count = m_stream->OnSysRead(m_buffer_start, m_buffer_size);
 200   m_buffer_end = m_buffer_start+count;
 201   m_buffer_pos = m_buffer_start;
 202
 203   if (count == 0)
 204     return FALSE;
 205   return TRUE;
 206 }
 207
 208 bool wxStreamBuffer::FlushBuffer()
 209 {
 210   size_t count, current;
 211
 212   if (m_buffer_pos == m_buffer_start || !m_flushable)
 213     return FALSE;
 214
 215   current = m_buffer_pos-m_buffer_start;
 216   count = m_stream->OnSysWrite(m_buffer_start, current);
 217   if (count != current)
 218     return FALSE;
 219   m_buffer_pos = m_buffer_start;
 220
 221   return TRUE;
 222 }
 223
 224 void wxStreamBuffer::GetFromBuffer(void *buffer, size_t size)
 225 {
 226   size_t s_toget = m_buffer_end-m_buffer_pos;
 227
 228   if (size < s_toget)
 229     s_toget = size;
 230
 231   memcpy(buffer, m_buffer_pos, s_toget);
 232   m_buffer_pos += s_toget;
 233 }
 234
 235 void wxStreamBuffer::PutToBuffer(const void *buffer, size_t size)
 236 {
 237   size_t s_toput = m_buffer_end-m_buffer_pos;
 238
 239   if (s_toput < size && !m_fixed) {
 240     m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
 241     // I round a bit
 242     m_buffer_size += size;
 243     m_buffer_end = m_buffer_start+m_buffer_size;
 244     s_toput = size;
 245   }
 246   if (s_toput > size)
 247     s_toput = size;
 248   memcpy(m_buffer_pos, buffer, s_toput);
 249   m_buffer_pos += s_toput;
 250 }
 251
 252 void wxStreamBuffer::PutChar(char c)
 253 {
 254   wxASSERT(m_stream != NULL);
 255
 256   if (!m_buffer_size) {
 257     m_stream->OnSysWrite(&c, 1);
 258     return;
 259   }
 260
 261   if (GetDataLeft() == 0 && !FlushBuffer()) {
 262     CHECK_ERROR(wxStream_WRITE_ERR);
 263     return;
 264   }
 265
 266   PutToBuffer(&c, 1);
 267   m_stream->m_lastcount = 1;
 268 }
 269
 270 char wxStreamBuffer::GetChar()
 271 {
 272   char c;
 273
 274   wxASSERT(m_stream != NULL);
 275
 276   if (!m_buffer_size) {
 277     m_stream->OnSysRead(&c, 1);
 278     return c;
 279   }
 280
 281   if (!GetDataLeft()) {
 282     CHECK_ERROR(wxStream_READ_ERR);
 283     return 0;
 284   }
 285
 286   GetFromBuffer(&c, 1);
 287
 288   m_stream->m_lastcount = 1;
 289   return c;
 290 }
 291
 292 size_t wxStreamBuffer::Read(void *buffer, size_t size)
 293 {
 294   wxASSERT(m_stream != NULL);
 295
 296   if (m_mode == write)
 297     return 0;
 298
 299   // ------------------
 300   // Buffering disabled
 301   // ------------------
 302
 303   m_stream->m_lasterror = wxStream_NOERROR;
 304   m_stream->m_lastcount = GetWBack((char *)buffer, size);
 305   size -= m_stream->m_lastcount;
 306   if (size == 0)
 307     return m_stream->m_lastcount;
 308
 309   buffer = (void *)((char *)buffer+m_stream->m_lastcount);
 310
 311   if (!m_buffer_size)
 312     return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
 313
 314   // -----------------
 315   // Buffering enabled
 316   // -----------------
 317   size_t buf_left, orig_size = size;
 318
 319   while (size > 0) {
 320     buf_left = GetDataLeft();
 321
 322     // First case: the requested buffer is larger than the stream buffer,
 323     //             we split it.
 324     if (size > buf_left) {
 325       GetFromBuffer(buffer, buf_left);
 326       size  -= buf_left;
 327       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
 328
 329       if (!FillBuffer()) {
 330         CHECK_ERROR(wxStream_READ_ERR);
 331         return (m_stream->m_lastcount = orig_size-size);
 332       }
 333     } else {
 334
 335       // Second case: we just copy from the stream buffer.
 336       GetFromBuffer(buffer, size);
 337       break;
 338     }
 339   }
 340   return (m_stream->m_lastcount += orig_size);
 341 }
 342
 343 size_t wxStreamBuffer::Read(wxStreamBuffer *s_buf)
 344 {
 345   char buf[BUF_TEMP_SIZE];
 346   size_t s = 0, bytes_read = BUF_TEMP_SIZE;
 347
 348   if (m_mode == write)
 349     return 0;
 350
 351   while (bytes_read != 0) {
 352     bytes_read = Read(buf, bytes_read);
 353     bytes_read = s_buf->Write(buf, bytes_read);
 354     s += bytes_read;
 355   }
 356   return s;
 357 }
 358
 359 size_t wxStreamBuffer::Write(const void *buffer, size_t size)
 360 {
 361   wxASSERT(m_stream != NULL);
 362
 363   if (m_mode == read)
 364     return 0;
 365
 366   // ------------------
 367   // Buffering disabled
 368   // ------------------
 369
 370   m_stream->m_lasterror = wxStream_NOERROR;
 371   if (!m_buffer_size)
 372     return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
 373
 374   // ------------------
 375   // Buffering enabled
 376   // ------------------
 377
 378   size_t buf_left, orig_size = size;
 379
 380   while (size > 0) {
 381     buf_left = m_buffer_end - m_buffer_pos;
 382
 383     // First case: the buffer to write is larger than the stream buffer,
 384     //             we split it
 385     if (size > buf_left) {
 386       PutToBuffer(buffer, buf_left);
 387       size -= buf_left;
 388       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
 389
 390       if (!FlushBuffer()) {
 391         CHECK_ERROR(wxStream_WRITE_ERR);
 392         return (m_stream->m_lastcount = orig_size-size);
 393       }
 394
 395       m_buffer_pos = m_buffer_start;
 396
 397     } else {
 398
 399       // Second case: just copy it in the stream buffer.
 400       PutToBuffer(buffer, size);
 401       break;
 402     }
 403   }
 404   return (m_stream->m_lastcount = orig_size);
 405 }
 406
 407 size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
 408 {
 409   char buf[BUF_TEMP_SIZE];
 410   size_t s = 0, bytes_count = BUF_TEMP_SIZE, b_count2;
 411
 412   if (m_mode == read)
 413     return 0;
 414
 415   while (bytes_count == BUF_TEMP_SIZE) {
 416     b_count2 = sbuf->Read(buf, bytes_count);
 417     bytes_count = Write(buf, b_count2);
 418     if (b_count2 > bytes_count)
 419       sbuf->WriteBack(buf+bytes_count, b_count2-bytes_count);
 420     s += bytes_count;
 421   }
 422   return s;
 423 }
 424
 425 off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
 426 {
 427   off_t ret_off, diff, last_access;
 428
 429   last_access = GetLastAccess();
 430
 431   if (!m_flushable) {
 432     diff = pos + GetIntPosition();
 433     if (diff < 0 || diff > last_access)
 434       return wxInvalidOffset;
 435     SetIntPosition(diff);
 436     return diff;
 437   }
 438
 439   switch (mode) {
 440   case wxFromStart: {
 441     // We'll try to compute an internal position later ...
 442     ret_off = m_stream->OnSysSeek(pos, wxFromStart);
 443     ResetBuffer();
 444     return ret_off;
 445   }
 446   case wxFromCurrent: {
 447     diff = pos + GetIntPosition();
 448
 449     if ( (diff > last_access) || (diff < 0) ) {
 450       ret_off = m_stream->OnSysSeek(pos, wxFromCurrent);
 451       ResetBuffer();
 452       return ret_off;
 453     } else {
 454       SetIntPosition(diff);
 455       return pos;
 456     }
 457   }
 458   case wxFromEnd:
 459     // Hard to compute: always seek to the requested position.
 460     ret_off = m_stream->OnSysSeek(pos, wxFromEnd);
 461     ResetBuffer();
 462     return ret_off;
 463   }
 464   return wxInvalidOffset;
 465 }
 466
 467 off_t wxStreamBuffer::Tell() const
 468 {
 469   off_t pos;
 470
 471   if (m_flushable) {
 472     pos = m_stream->OnSysTell();
 473     if (pos == wxInvalidOffset)
 474       return wxInvalidOffset;
 475     return pos - GetLastAccess() + GetIntPosition();
 476   } else
 477     return GetIntPosition();
 478 }
 479
 480 size_t wxStreamBuffer::GetDataLeft()
 481 {
 482   if (m_buffer_end == m_buffer_pos && m_flushable)
 483     FillBuffer();
 484   return m_buffer_end-m_buffer_pos;
 485 }
 486
 487 // ----------------------------------------------------------------------------
 488 // wxStreamBase
 489 // ----------------------------------------------------------------------------
 490
 491 wxStreamBase::wxStreamBase()
 492 {
 493   m_lasterror = wxStream_NOERROR;
 494   m_lastcount = 0;
 495 }
 496
 497 wxStreamBase::~wxStreamBase()
 498 {
 499 }
 500
 501 size_t wxStreamBase::OnSysRead(void *WXUNUSED(buffer), size_t WXUNUSED(size))
 502 {
 503   return 0;
 504 }
 505
 506 size_t wxStreamBase::OnSysWrite(const void *WXUNUSED(buffer), size_t WXUNUSED(bufsize))
 507 {
 508   return 0;
 509 }
 510
 511 off_t wxStreamBase::OnSysSeek(off_t WXUNUSED(seek), wxSeekMode WXUNUSED(mode))
 512 {
 513   return wxInvalidOffset;
 514 }
 515
 516 off_t wxStreamBase::OnSysTell() const
 517 {
 518   return wxInvalidOffset;
 519 }
 520
 521 // ----------------------------------------------------------------------------
 522 // wxInputStream
 523 // ----------------------------------------------------------------------------
 524
 525 wxInputStream::wxInputStream()
 526   : wxStreamBase()
 527 {
 528   m_i_destroybuf = TRUE;
 529   m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
 530 }
 531
 532 wxInputStream::wxInputStream(wxStreamBuffer *buffer)
 533   : wxStreamBase()
 534 {
 535   m_i_destroybuf = FALSE;
 536   m_i_streambuf = buffer;
 537 }
 538
 539 wxInputStream::~wxInputStream()
 540 {
 541   if (m_i_destroybuf)
 542     delete m_i_streambuf;
 543 }
 544
 545 char wxInputStream::GetC()
 546 {
 547   char c;
 548   m_i_streambuf->Read(&c, 1);
 549   return c;
 550 }
 551
 552 wxInputStream& wxInputStream::Read(void *buffer, size_t size)
 553 {
 554   m_i_streambuf->Read(buffer, size);
 555   // wxStreamBuffer sets all variables for us
 556   return *this;
 557 }
 558
 559 char wxInputStream::Peek()
 560 {
 561   m_i_streambuf->GetDataLeft();
 562
 563   return *(m_i_streambuf->GetBufferPos());
 564 }
 565
 566
 567 wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
 568 {
 569   char buf[BUF_TEMP_SIZE];
 570   size_t bytes_read = BUF_TEMP_SIZE;
 571
 572   while (bytes_read == BUF_TEMP_SIZE) {
 573     bytes_read = Read(buf, bytes_read).LastRead();
 574     bytes_read = stream_out.Write(buf, bytes_read).LastWrite();
 575   }
 576   return *this;
 577 }
 578
 579 off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
 580 {
 581   return m_i_streambuf->Seek(pos, mode);
 582 }
 583
 584 off_t wxInputStream::TellI() const
 585 {
 586   return m_i_streambuf->Tell();
 587 }
 588
 589 // --------------------
 590 // Overloaded operators
 591 // --------------------
 592
 593 wxInputStream& wxInputStream::operator>>(wxString& line)
 594 {
 595   wxDataInputStream s(*this);
 596
 597   line = s.ReadLine();
 598   return *this;
 599 }
 600
 601 wxInputStream& wxInputStream::operator>>(char& c)
 602 {
 603   c = GetC();
 604   return *this;
 605 }
 606
 607 wxInputStream& wxInputStream::operator>>(signed short& i)
 608 {
 609   signed long l;
 610
 611   *this >> l;
 612   i = (signed short)l;
 613   return *this;
 614 }
 615
 616 wxInputStream& wxInputStream::operator>>(signed int& i)
 617 {
 618   signed long l;
 619
 620   *this >> l;
 621   i = (signed int)l;
 622   return *this;
 623 }
 624
 625 wxInputStream& wxInputStream::operator>>(signed long& i)
 626 {
 627   /* I only implemented a simple integer parser */
 628   int c;
 629   int sign;
 630
 631   while (isspace( c = GetC() ) )
 632      /* Do nothing */ ;
 633
 634   i = 0;
 635   if (! (c == '-' || isdigit(c)) ) {
 636     InputStreamBuffer()->WriteBack(c);
 637     return *this;
 638   }
 639
 640   if (c == '-') {
 641     sign = -1;
 642     c = GetC();
 643   } else if (c == '+') {
 644     sign = 1;
 645     c = GetC();
 646   } else {
 647     sign = 1;
 648   }
 649
 650   while (isdigit(c)) {
 651     i = i*10 + c;
 652     c = GetC();
 653   }
 654
 655   i *= sign;
 656
 657   return *this;
 658 }
 659
 660 wxInputStream& wxInputStream::operator>>(unsigned short& i)
 661 {
 662   unsigned long l;
 663
 664   *this >> l;
 665   i = (unsigned short)l;
 666   return *this;
 667 }
 668
 669 wxInputStream& wxInputStream::operator>>(unsigned int& i)
 670 {
 671   unsigned long l;
 672
 673   *this >> l;
 674   i = (unsigned int)l;
 675   return *this;
 676 }
 677
 678 wxInputStream& wxInputStream::operator>>(unsigned long& i)
 679 {
 680   /* I only implemented a simple integer parser */
 681   int c;
 682
 683   while (isspace( c = GetC() ) )
 684      /* Do nothing */ ;
 685
 686   i = 0;
 687   if (!isdigit(c)) {
 688     InputStreamBuffer()->WriteBack(c);
 689     return *this;
 690   }
 691
 692   while (isdigit(c)) {
 693     i = i*10 + c;
 694     c = GetC();
 695   }
 696
 697   return *this;
 698 }
 699
 700 wxInputStream& wxInputStream::operator>>(double& f)
 701 {
 702   /* I only implemented a simple float parser */
 703   int c, sign;
 704
 705   while (isspace( c = GetC() ) )
 706      /* Do nothing */ ;
 707
 708   f = 0.0;
 709   if (! (c == '-' || isdigit(c)) ) {
 710     InputStreamBuffer()->WriteBack(c);
 711     return *this;
 712   }
 713
 714   if (c == '-') {
 715     sign = -1;
 716     c = GetC();
 717   } else if (c == '+') {
 718     sign = 1;
 719     c = GetC();
 720   } else {
 721     sign = 1;
 722   }
 723
 724   while (isdigit(c)) {
 725     f = f*10 + (c - '0');
 726     c = GetC();
 727   }
 728
 729   if (c == '.') {
 730     double f_multiplicator = (double) 0.1;
 731     c = GetC();
 732
 733     while (isdigit(c)) {
 734       f += (c-'0')*f_multiplicator;
 735       f_multiplicator /= 10;
 736       c = GetC();
 737     }
 738   }
 739
 740   f *= sign;
 741
 742   return *this;
 743 }
 744
 745 #if wxUSE_SERIAL
 746 wxInputStream& wxInputStream::operator>>(wxObject *& obj)
 747 {
 748   wxObjectInputStream obj_s(*this);
 749   obj = obj_s.LoadObject();
 750   return *this;
 751 }
 752 #endif
 753
 754
 755 // ----------------------------------------------------------------------------
 756 // wxOutputStream
 757 // ----------------------------------------------------------------------------
 758 wxOutputStream::wxOutputStream()
 759   : wxStreamBase()
 760 {
 761   m_o_destroybuf = TRUE;
 762   m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
 763 }
 764
 765 wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
 766   : wxStreamBase()
 767 {
 768   m_o_destroybuf = FALSE;
 769   m_o_streambuf = buffer;
 770 }
 771
 772 wxOutputStream::~wxOutputStream()
 773 {
 774   if (m_o_destroybuf)
 775     delete m_o_streambuf;
 776 }
 777
 778 wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
 779 {
 780   m_o_streambuf->Write(buffer, size);
 781   return *this;
 782 }
 783
 784 wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
 785 {
 786   stream_in.Read(*this);
 787   return *this;
 788 }
 789
 790 off_t wxOutputStream::TellO() const
 791 {
 792   return m_o_streambuf->Tell();
 793 }
 794
 795 off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
 796 {
 797   return m_o_streambuf->Seek(pos, mode);
 798 }
 799
 800 void wxOutputStream::Sync()
 801 {
 802   m_o_streambuf->FlushBuffer();
 803 }
 804
 805 wxOutputStream& wxOutputStream::operator<<(const char *string)
 806 {
 807   return Write(string, strlen(string));
 808 }
 809
 810 wxOutputStream& wxOutputStream::operator<<(wxString& string)
 811 {
 812 #if wxUSE_UNICODE
 813   const wxWX2MBbuf buf = string.mb_str();
 814   return *this << buf;
 815 #else
 816   return Write(string, string.Len());
 817 #endif
 818 }
 819
 820 wxOutputStream& wxOutputStream::operator<<(char c)
 821 {
 822   return Write(&c, 1);
 823 }
 824
 825 wxOutputStream& wxOutputStream::operator<<(signed short i)
 826 {
 827   signed long l = (signed long)i;
 828   return *this << l;
 829 }
 830
 831 wxOutputStream& wxOutputStream::operator<<(signed int i)
 832 {
 833   signed long l = (signed long)i;
 834   return *this << l;
 835 }
 836
 837 wxOutputStream& wxOutputStream::operator<<(signed long i)
 838 {
 839   wxString strlong;
 840   strlong.Printf(_T("%ld"), i);
 841   return *this << strlong;
 842 }
 843
 844 wxOutputStream& wxOutputStream::operator<<(unsigned short i)
 845 {
 846   unsigned long l = (unsigned long)i;
 847   return *this << l;
 848 }
 849
 850 wxOutputStream& wxOutputStream::operator<<(unsigned int i)
 851 {
 852   unsigned long l = (unsigned long)i;
 853   return *this << l;
 854 }
 855
 856 wxOutputStream& wxOutputStream::operator<<(unsigned long i)
 857 {
 858   wxString strlong;
 859   strlong.Printf(_T("%lu"), i);
 860   return *this << strlong;
 861 }
 862
 863 wxOutputStream& wxOutputStream::operator<<(double f)
 864 {
 865   wxString strfloat;
 866
 867   strfloat.Printf(_T("%f"), f);
 868   return *this << strfloat;
 869 }
 870
 871 #if wxUSE_SERIAL
 872 wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
 873 {
 874   wxObjectOutputStream obj_s(*this);
 875   obj_s.SaveObject(obj);
 876   return *this;
 877 }
 878 #endif
 879
 880 // ----------------------------------------------------------------------------
 881 // wxFilterInputStream
 882 // ----------------------------------------------------------------------------
 883 wxFilterInputStream::wxFilterInputStream()
 884   : wxInputStream(NULL)
 885 {
 886   // WARNING streambuf set to NULL !
 887 }
 888
 889 wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
 890   : wxInputStream(stream.InputStreamBuffer())
 891 {
 892   m_parent_i_stream = &stream;
 893 }
 894
 895 wxFilterInputStream::~wxFilterInputStream()
 896 {
 897 }
 898
 899 // ----------------------------------------------------------------------------
 900 // wxFilterOutputStream
 901 // ----------------------------------------------------------------------------
 902 wxFilterOutputStream::wxFilterOutputStream()
 903   : wxOutputStream(NULL)
 904 {
 905 }
 906
 907 wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
 908   : wxOutputStream(stream.OutputStreamBuffer())
 909 {
 910   m_parent_o_stream = &stream;
 911 }
 912
 913 wxFilterOutputStream::~wxFilterOutputStream()
 914 {
 915 }
 916
 917 // ----------------------------------------------------------------------------
 918 // Some IOManip function
 919 // ----------------------------------------------------------------------------
 920
 921 wxOutputStream& wxEndL(wxOutputStream& stream)
 922 {
 923 #ifdef __MSW__
 924   return stream.Write("\r\n", 2);
 925 #else
 926   return stream.Write("\n", 1);
 927 #endif
 928 }
 929
 930 #endif
 931   // wxUSE_STREAMS