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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
44wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
45 : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
46 m_buffer_size(0), m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
47 m_mode(mode), m_destroybuf(FALSE), m_destroystream(FALSE)
48{
49}
50
51wxStreamBuffer::wxStreamBuffer(BufMode mode)
52 : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
53 m_buffer_size(0), m_fixed(TRUE), m_flushable(FALSE), m_stream(NULL),
54 m_mode(mode), m_destroybuf(FALSE), m_destroystream(TRUE)
55{
56 m_stream = new wxStreamBase();
57}
58
59wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
60{
61 m_buffer_start = buffer.m_buffer_start;
62 m_buffer_end = buffer.m_buffer_end;
63 m_buffer_pos = buffer.m_buffer_pos;
64 m_buffer_size = buffer.m_buffer_size;
65 m_fixed = buffer.m_fixed;
66 m_flushable = buffer.m_flushable;
67 m_stream = buffer.m_stream;
68 m_mode = buffer.m_mode;
69 m_destroybuf = FALSE;
70 m_destroystream = FALSE;
71}
72
73wxStreamBuffer::~wxStreamBuffer()
74{
75 if (m_destroybuf)
76 wxDELETEA(m_buffer_start);
77 if (m_destroystream)
78 delete m_stream;
79}
80
81void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
82{
83 if (m_destroybuf)
84 wxDELETEA(m_buffer_start);
85 m_buffer_start = buffer_start;
86 m_buffer_end = buffer_end;
87
88 m_buffer_size = m_buffer_end-m_buffer_start;
89 m_destroybuf = FALSE;
90 ResetBuffer();
91}
92
93void wxStreamBuffer::SetBufferIO(size_t bufsize)
94{
95 char *b_start;
96
97 if (m_destroybuf)
98 wxDELETEA(m_buffer_start);
99
100 if (!bufsize) {
101 m_buffer_start = NULL;
102 m_buffer_end = NULL;
103 m_buffer_pos = NULL;
104 m_buffer_size = 0;
105 return;
106 }
107
108 b_start = new char[bufsize];
109 SetBufferIO(b_start, b_start + bufsize);
110 m_destroybuf = TRUE;
111}
112
113void wxStreamBuffer::ResetBuffer()
114{
115 m_stream->m_lasterror = wxStream_NOERROR;
116 m_stream->m_lastcount = 0;
117 if (m_mode == read)
118 m_buffer_pos = m_buffer_end;
119 else
120 m_buffer_pos = m_buffer_start;
121}
122
123bool wxStreamBuffer::FillBuffer()
124{
125 size_t count;
126
127 count = m_stream->OnSysRead(m_buffer_start, m_buffer_size);
128 m_buffer_end = m_buffer_start+count;
129 m_buffer_pos = m_buffer_start;
130
131 if (count == 0)
132 return FALSE;
133 return TRUE;
134}
135
136bool wxStreamBuffer::FlushBuffer()
137{
138 size_t count, current;
139
140 if (m_buffer_pos == m_buffer_start || !m_flushable)
141 return FALSE;
142
143 current = m_buffer_pos-m_buffer_start;
144 count = m_stream->OnSysWrite(m_buffer_start, current);
145 if (count != current)
146 return FALSE;
147 m_buffer_pos = m_buffer_start;
148
149 return TRUE;
150}
151
152void wxStreamBuffer::GetFromBuffer(void *buffer, size_t size)
153{
154 size_t s_toget = m_buffer_end-m_buffer_pos;
155
156 if (size < s_toget)
157 s_toget = size;
158
159 memcpy(buffer, m_buffer_pos, s_toget);
160 m_buffer_pos += s_toget;
161}
162
163void wxStreamBuffer::PutToBuffer(const void *buffer, size_t size)
164{
165 size_t s_toput = m_buffer_end-m_buffer_pos;
166
167 if (s_toput < size && !m_fixed) {
168 if (!m_buffer_start)
169 SetBufferIO(size);
170 else {
171 size_t delta = m_buffer_pos-m_buffer_start;
172
173 m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
174 m_buffer_pos = m_buffer_start + delta;
175 // I round a bit
176 m_buffer_size += size;
177 m_buffer_end = m_buffer_start+m_buffer_size;
178 }
179 s_toput = size;
180 }
181 if (s_toput > size)
182 s_toput = size;
183 memcpy(m_buffer_pos, buffer, s_toput);
184 m_buffer_pos += s_toput;
185}
186
187void wxStreamBuffer::PutChar(char c)
188{
189 wxASSERT(m_stream != NULL);
190
191 if (!m_buffer_size) {
192 m_stream->OnSysWrite(&c, 1);
193 return;
194 }
195
196 if (GetDataLeft() == 0 && !FlushBuffer()) {
197 CHECK_ERROR(wxStream_WRITE_ERR);
198 return;
199 }
200
201 PutToBuffer(&c, 1);
202 m_stream->m_lastcount = 1;
203}
204
205char wxStreamBuffer::Peek()
206{
207 char c;
208
209 wxASSERT(m_stream != NULL && m_buffer_size != 0);
210
211 if (!GetDataLeft()) {
212 CHECK_ERROR(wxStream_READ_ERR);
213 return 0;
214 }
215
216 GetFromBuffer(&c, 1);
217 m_buffer_pos--;
218
219 return c;
220}
221
222char wxStreamBuffer::GetChar()
223{
224 char c;
225
226 wxASSERT(m_stream != NULL);
227
228 if (!m_buffer_size) {
229 m_stream->OnSysRead(&c, 1);
230 return c;
231 }
232
233 if (!GetDataLeft()) {
234 CHECK_ERROR(wxStream_READ_ERR);
235 return 0;
236 }
237
238 GetFromBuffer(&c, 1);
239
240 m_stream->m_lastcount = 1;
241 return c;
242}
243
244size_t wxStreamBuffer::Read(void *buffer, size_t size)
245{
246 wxASSERT(m_stream != NULL);
247
248 if (m_mode == write)
249 return 0;
250
251 // ------------------
252 // Buffering disabled
253 // ------------------
254
255 m_stream->m_lasterror = wxStream_NOERROR;
256 if (!m_buffer_size)
257 return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
258
259 // -----------------
260 // Buffering enabled
261 // -----------------
262 size_t buf_left, orig_size = size;
263
264 while (size > 0) {
265 buf_left = GetDataLeft();
266
267 // First case: the requested buffer is larger than the stream buffer,
268 // we split it.
269 if (size > buf_left) {
270 GetFromBuffer(buffer, buf_left);
271 size -= buf_left;
272 buffer = (char *)buffer + buf_left; // ANSI C++ violation.
273
274 if (!FillBuffer()) {
275 CHECK_ERROR(wxStream_EOF);
276 return (m_stream->m_lastcount = orig_size-size);
277 }
278 } else {
279
280 // Second case: we just copy from the stream buffer.
281 GetFromBuffer(buffer, size);
282 break;
283 }
284 }
285 return (m_stream->m_lastcount += orig_size);
286}
287
288size_t wxStreamBuffer::Read(wxStreamBuffer *s_buf)
289{
290 char buf[BUF_TEMP_SIZE];
291 size_t s = 0, bytes_read = BUF_TEMP_SIZE;
292
293 if (m_mode == write)
294 return 0;
295
296 while (bytes_read != 0) {
297 bytes_read = Read(buf, bytes_read);
298 bytes_read = s_buf->Write(buf, bytes_read);
299 s += bytes_read;
300 }
301 return s;
302}
303
304size_t wxStreamBuffer::Write(const void *buffer, size_t size)
305{
306 wxASSERT(m_stream != NULL);
307
308 if (m_mode == read)
309 return 0;
310
311 // ------------------
312 // Buffering disabled
313 // ------------------
314
315 m_stream->m_lasterror = wxStream_NOERROR;
316 if (!m_buffer_size && m_fixed)
317 return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
318
319 // ------------------
320 // Buffering enabled
321 // ------------------
322
323 size_t buf_left, orig_size = size;
324
325 while (size > 0) {
326 buf_left = m_buffer_end - m_buffer_pos;
327
328 // First case: the buffer to write is larger than the stream buffer,
329 // we split it
330 // NB: If stream buffer isn't fixed (as for wxMemoryOutputStream),
331 // we always go to the second case.
332 if (size > buf_left && m_fixed) {
333 PutToBuffer(buffer, buf_left);
334 size -= buf_left;
335 buffer = (char *)buffer + buf_left; // ANSI C++ violation.
336
337 if (!FlushBuffer()) {
338 CHECK_ERROR(wxStream_WRITE_ERR);
339 return (m_stream->m_lastcount = orig_size-size);
340 }
341
342 m_buffer_pos = m_buffer_start;
343
344 } else {
345
346 // Second case: just copy it in the stream buffer.
347 PutToBuffer(buffer, size);
348 break;
349 }
350 }
351 return (m_stream->m_lastcount = orig_size);
352}
353
354size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
355{
356 char buf[BUF_TEMP_SIZE];
357 size_t s = 0, bytes_count = BUF_TEMP_SIZE, b_count2;
358 wxInputStream *in_stream;
359
360 if (m_mode == read)
361 return 0;
362
363 in_stream = (wxInputStream *)sbuf->Stream();
364
365 while (bytes_count == BUF_TEMP_SIZE) {
366 b_count2 = sbuf->Read(buf, bytes_count);
367 bytes_count = Write(buf, b_count2);
368 if (b_count2 > bytes_count)
369 in_stream->Ungetch(buf+bytes_count, b_count2-bytes_count);
370 s += bytes_count;
371 }
372 return s;
373}
374
375off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
376{
377 off_t ret_off, diff, last_access;
378
379 last_access = GetLastAccess();
380
381 if (!m_flushable) {
382 diff = pos + GetIntPosition();
383 if (diff < 0 || diff > last_access)
384 return wxInvalidOffset;
385 SetIntPosition(diff);
386 return diff;
387 }
388
389 switch (mode) {
390 case wxFromStart: {
391 // We'll try to compute an internal position later ...
392 ret_off = m_stream->OnSysSeek(pos, wxFromStart);
393 ResetBuffer();
394 return ret_off;
395 }
396 case wxFromCurrent: {
397 diff = pos + GetIntPosition();
398
399 if ( (diff > last_access) || (diff < 0) ) {
400 // We must take into account the fact that we have read something
401 // previously.
402 ret_off = m_stream->OnSysSeek(diff-last_access, wxFromCurrent);
403 ResetBuffer();
404 return ret_off;
405 } else {
406 SetIntPosition(diff);
407 return pos;
408 }
409 }
410 case wxFromEnd:
411 // Hard to compute: always seek to the requested position.
412 ret_off = m_stream->OnSysSeek(pos, wxFromEnd);
413 ResetBuffer();
414 return ret_off;
415 }
416 return wxInvalidOffset;
417}
418
419off_t wxStreamBuffer::Tell() const
420{
421 off_t pos;
422
423 if (m_flushable) {
424 pos = m_stream->OnSysTell();
425 if (pos == wxInvalidOffset)
426 return wxInvalidOffset;
427 return pos - GetLastAccess() + GetIntPosition();
428 } else
429 return GetIntPosition();
430}
431
432size_t wxStreamBuffer::GetDataLeft()
433{
434 if (m_buffer_end == m_buffer_pos && m_flushable)
435 FillBuffer();
436 return m_buffer_end-m_buffer_pos;
437}
438
439// ----------------------------------------------------------------------------
440// wxStreamBase
441// ----------------------------------------------------------------------------
442
443wxStreamBase::wxStreamBase()
444{
445 m_lasterror = wxStream_NOERROR;
446 m_lastcount = 0;
447}
448
449wxStreamBase::~wxStreamBase()
450{
451}
452
453size_t wxStreamBase::OnSysRead(void *WXUNUSED(buffer), size_t WXUNUSED(size))
454{
455 return 0;
456}
457
458size_t wxStreamBase::OnSysWrite(const void *WXUNUSED(buffer), size_t WXUNUSED(bufsize))
459{
460 return 0;
461}
462
463off_t wxStreamBase::OnSysSeek(off_t WXUNUSED(seek), wxSeekMode WXUNUSED(mode))
464{
465 return wxInvalidOffset;
466}
467
468off_t wxStreamBase::OnSysTell() const
469{
470 return wxInvalidOffset;
471}
472
473// ----------------------------------------------------------------------------
474// wxInputStream
475// ----------------------------------------------------------------------------
476
477wxInputStream::wxInputStream()
478 : wxStreamBase(),
479 m_wback(NULL), m_wbacksize(0), m_wbackcur(0)
480{
481}
482
483wxInputStream::~wxInputStream()
484{
485 if (m_wback)
486 free(m_wback);
487}
488
489char *wxInputStream::AllocSpaceWBack(size_t needed_size)
490{
491 char *temp_b;
492 size_t old_size;
493
494 old_size = m_wbacksize;
495 m_wbacksize += needed_size;
496
497 if (!m_wback)
498 temp_b = (char *)malloc(m_wbacksize);
499 else
500 temp_b = (char *)realloc(m_wback, m_wbacksize);
501
502 if (!temp_b)
503 return NULL;
504 m_wback = temp_b;
505
506 memmove(m_wback+needed_size, m_wback, old_size);
507
508 return (char *)(m_wback);
509}
510
511size_t wxInputStream::GetWBack(char *buf, size_t bsize)
512{
513 size_t s_toget = m_wbacksize-m_wbackcur;
514
515 if (!m_wback)
516 return 0;
517
518 if (bsize < s_toget)
519 s_toget = bsize;
520
521 memcpy(buf, (m_wback+m_wbackcur), s_toget);
522
523 m_wbackcur += s_toget;
524 if (m_wbackcur == m_wbacksize) {
525 free(m_wback);
526 m_wback = (char *)NULL;
527 m_wbacksize = 0;
528 m_wbackcur = 0;
529 }
530
531 return s_toget;
532}
533
534size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
535{
536 char *ptrback;
537
538 ptrback = AllocSpaceWBack(bufsize);
539 if (!ptrback)
540 return 0;
541
542 memcpy(ptrback, buf, bufsize);
543 return bufsize;
544}
545
546bool wxInputStream::Ungetch(char c)
547{
548 char *ptrback;
549
550 ptrback = AllocSpaceWBack(1);
551 if (!ptrback)
552 return FALSE;
553
554 *ptrback = c;
555 return TRUE;
556}
557
558char wxInputStream::GetC()
559{
560 char c;
561 Read(&c, 1);
562 return c;
563}
564
565wxInputStream& wxInputStream::Read(void *buffer, size_t size)
566{
567 size_t retsize;
568 char *buf = (char *)buffer;
569
570 retsize = GetWBack(buf, size);
571 if (retsize == size) {
572 m_lastcount = size;
573 m_lasterror = wxStream_NOERROR;
574 return *this;
575 }
576 size -= retsize;
577 buf += retsize;
578
579 m_lastcount = OnSysRead(buf, size);
580 return *this;
581}
582
583char wxInputStream::Peek()
584{
585 char c;
586
587 Read(&c, 1);
588 if (m_lasterror == wxStream_NOERROR) {
589 Ungetch(c);
590 return c;
591 }
592 return 0;
593}
594
595wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
596{
597 char buf[BUF_TEMP_SIZE];
598 size_t bytes_read = BUF_TEMP_SIZE;
599
600 while (bytes_read == BUF_TEMP_SIZE) {
601 bytes_read = Read(buf, bytes_read).LastRead();
602 bytes_read = stream_out.Write(buf, bytes_read).LastWrite();
603 }
604 return *this;
605}
606
607off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
608{
609 //should be check and improve, just to remove a slight bug !
610 // I don't know whether it should be put as well in wxFileInputStream::OnSysSeek ?
611 if (m_lasterror==wxSTREAM_EOF) m_lasterror=wxSTREAM_NOERROR;
612
613 return OnSysSeek(pos, mode);
614}
615
616off_t wxInputStream::TellI() const
617{
618 return OnSysTell();
619}
620
621// --------------------
622// Overloaded operators
623// --------------------
624
625#if wxUSE_SERIAL
626wxInputStream& wxInputStream::operator>>(wxObject *& obj)
627{
628 wxObjectInputStream obj_s(*this);
629 obj = obj_s.LoadObject();
630 return *this;
631}
632#endif
633
634
635// ----------------------------------------------------------------------------
636// wxOutputStream
637// ----------------------------------------------------------------------------
638wxOutputStream::wxOutputStream()
639 : wxStreamBase()
640{
641}
642
643wxOutputStream::~wxOutputStream()
644{
645}
646
647wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
648{
649 m_lastcount = OnSysWrite(buffer, size);
650 return *this;
651}
652
653wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
654{
655 stream_in.Read(*this);
656 return *this;
657}
658
659off_t wxOutputStream::TellO() const
660{
661 return OnSysTell();
662}
663
664off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
665{
666 return OnSysSeek(pos, mode);
667}
668
669void wxOutputStream::Sync()
670{
671}
672
673#if wxUSE_SERIAL
674wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
675{
676 wxObjectOutputStream obj_s(*this);
677 obj_s.SaveObject(obj);
678 return *this;
679}
680#endif
681
682// ----------------------------------------------------------------------------
683// wxCountingOutputStream
684// ----------------------------------------------------------------------------
685
686wxCountingOutputStream::wxCountingOutputStream ()
687 : wxOutputStream()
688{
689 m_currentPos = 0;
690}
691
692size_t wxCountingOutputStream::GetSize() const
693{
694 return m_lastcount;
695}
696
697size_t wxCountingOutputStream::OnSysWrite(const void *WXUNUSED(buffer), size_t size)
698{
699 m_currentPos += size;
700 if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
701 return m_currentPos;
702}
703
704off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
705{
706 if (mode == wxFromStart)
707 {
708 m_currentPos = pos;
709 }
710 if (mode == wxFromEnd)
711 {
712 m_currentPos = m_lastcount + pos;
713 }
714 else
715 {
716 m_currentPos += pos;
717 }
718 if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
719
720 return m_currentPos; // ?
721}
722
723off_t wxCountingOutputStream::OnSysTell() const
724{
725 return m_currentPos; // ?
726}
727
728// ----------------------------------------------------------------------------
729// wxFilterInputStream
730// ----------------------------------------------------------------------------
731
732wxFilterInputStream::wxFilterInputStream()
733 : wxInputStream()
734{
735}
736
737wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
738 : wxInputStream()
739{
740 m_parent_i_stream = &stream;
741}
742
743wxFilterInputStream::~wxFilterInputStream()
744{
745}
746
747// ----------------------------------------------------------------------------
748// wxFilterOutputStream
749// ----------------------------------------------------------------------------
750wxFilterOutputStream::wxFilterOutputStream()
751 : wxOutputStream()
752{
753}
754
755wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
756 : wxOutputStream()
757{
758 m_parent_o_stream = &stream;
759}
760
761wxFilterOutputStream::~wxFilterOutputStream()
762{
763}
764
765// ----------------------------------------------------------------------------
766// wxBufferedInputStream
767// ----------------------------------------------------------------------------
768wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s)
769 : wxFilterInputStream(s)
770{
771 m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
772 m_i_streambuf->SetBufferIO(1024);
773}
774
775wxBufferedInputStream::~wxBufferedInputStream()
776{
777 delete m_i_streambuf;
778}
779
780char wxBufferedInputStream::Peek()
781{
782 return m_i_streambuf->Peek();
783}
784
785wxInputStream& wxBufferedInputStream::Read(void *buffer, size_t size)
786{
787 size_t retsize;
788 char *buf = (char *)buffer;
789
790 retsize = GetWBack(buf, size);
791 m_lastcount = retsize;
792 if (retsize == size) {
793 m_lasterror = wxStream_NOERROR;
794 return *this;
795 }
796 size -= retsize;
797 buf += retsize;
798
799 m_i_streambuf->Read(buf, size);
800
801 return *this;
802}
803
804off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
805{
806 return m_i_streambuf->Seek(pos, mode);
807}
808
809off_t wxBufferedInputStream::TellI() const
810{
811 return m_i_streambuf->Tell();
812}
813
814size_t wxBufferedInputStream::OnSysRead(void *buffer, size_t bufsize)
815{
816 return m_parent_i_stream->Read(buffer, bufsize).LastRead();
817}
818
819off_t wxBufferedInputStream::OnSysSeek(off_t seek, wxSeekMode mode)
820{
821 return m_parent_i_stream->SeekI(seek, mode);
822}
823
824off_t wxBufferedInputStream::OnSysTell() const
825{
826 return m_parent_i_stream->TellI();
827}
828
829// ----------------------------------------------------------------------------
830// wxBufferedOutputStream
831// ----------------------------------------------------------------------------
832
833wxBufferedOutputStream::wxBufferedOutputStream(wxOutputStream& s)
834 : wxFilterOutputStream(s)
835{
836 m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
837 m_o_streambuf->SetBufferIO(1024);
838}
839
840wxBufferedOutputStream::~wxBufferedOutputStream()
841{
842 delete m_o_streambuf;
843}
844
845wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
846{
847 m_lastcount = 0;
848 m_o_streambuf->Write(buffer, size);
849 return *this;
850}
851
852off_t wxBufferedOutputStream::SeekO(off_t pos, wxSeekMode mode)
853{
854 return m_o_streambuf->Seek(pos, mode);
855}
856
857off_t wxBufferedOutputStream::TellO() const
858{
859 return m_o_streambuf->Tell();
860}
861
862void wxBufferedOutputStream::Sync()
863{
864 m_o_streambuf->FlushBuffer();
865 m_parent_o_stream->Sync();
866}
867
868size_t wxBufferedOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
869{
870 return m_parent_o_stream->Write(buffer, bufsize).LastWrite();
871}
872
873off_t wxBufferedOutputStream::OnSysSeek(off_t seek, wxSeekMode mode)
874{
875 return m_parent_o_stream->SeekO(seek, mode);
876}
877
878off_t wxBufferedOutputStream::OnSysTell() const
879{
880 return m_parent_o_stream->TellO();
881}
882
883// ----------------------------------------------------------------------------
884// Some IOManip function
885// ----------------------------------------------------------------------------
886
887wxOutputStream& wxEndL(wxOutputStream& stream)
888{
889#ifdef __MSW__
890 return stream.Write("\r\n", 2);
891#else
892#ifdef __WXMAC__
893 return stream.Write("\r", 1);
894#else
895 return stream.Write("\n", 1);
896#endif
897#endif
898}
899
900#endif
901 // wxUSE_STREAMS