X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8ef6a930daefddf6bb39fefbea0baaed09071342..12234741d9a82790cac2733e88ca64610283f5fa:/src/common/stream.cpp

diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index 1ea04bc61d..6698b43ad8 100644
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -15,21 +15,32 @@
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+  #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+  #include "wx/defs.h"
+#endif
+
+#if wxUSE_STREAMS
+
 #include <ctype.h>
 #include <wx/stream.h>
 #include <wx/datstrm.h>
 #include <wx/objstrm.h>
 
-#ifdef __BORLANDC__
-#pragma hdrstop
-#endif
-
 #define BUF_TEMP_SIZE 10000
 
 // ----------------------------------------------------------------------------
 // wxStreamBuffer
 // ----------------------------------------------------------------------------
 
+#define CHECK_ERROR(err) \
+   if (m_stream->m_lasterror == wxStream_NOERROR) \
+     m_stream->m_lasterror = err
+
 wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
   : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
     m_buffer_size(0), m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
@@ -67,30 +78,6 @@ wxStreamBuffer::~wxStreamBuffer()
     delete m_stream;
 }
 
-size_t wxStreamBuffer::WriteBack(const char *buf, size_t bufsize)
-{
-  char *ptrback;
-
-  ptrback = AllocSpaceWBack(bufsize);
-  if (!ptrback)
-    return 0;
-
-  memcpy(ptrback, buf, bufsize);
-  return bufsize;
-}
-
-bool wxStreamBuffer::WriteBack(char c)
-{
-  char *ptrback;
-
-  ptrback = AllocSpaceWBack(1);
-  if (!ptrback)
-    return FALSE;
-
-  *ptrback = c;
-  return TRUE;
-}
-
 void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
 {
   if (m_destroybuf)
@@ -107,7 +94,8 @@ void wxStreamBuffer::SetBufferIO(size_t bufsize)
 {
   char *b_start;
 
-  wxDELETE(m_buffer_start);
+  if (m_destroybuf)
+    wxDELETEA(m_buffer_start);
 
   if (!bufsize) {
     m_buffer_start = NULL;
@@ -124,48 +112,14 @@ void wxStreamBuffer::SetBufferIO(size_t bufsize)
 
 void wxStreamBuffer::ResetBuffer()
 {
+  m_stream->m_lasterror = wxStream_NOERROR;
+  m_stream->m_lastcount = 0;
   if (m_mode == read)
     m_buffer_pos = m_buffer_end;
   else
     m_buffer_pos = m_buffer_start;
 }
 
-char *wxStreamBuffer::AllocSpaceWBack(size_t needed_size)
-{
-  char *temp_b;
-
-  m_wbacksize += needed_size;
-
-  if (!m_wback)
-    temp_b = (char *)malloc(m_wbacksize);
-  else
-    temp_b = (char *)realloc(m_wback, m_wbacksize);
-
-  if (!temp_b)
-    return NULL;
-  return (char *)((size_t)m_wback+(m_wbacksize-needed_size));
-}
-
-size_t wxStreamBuffer::GetWBack(char *buf, size_t bsize)
-{
-  size_t s_toget = m_wbacksize-m_wbackcur;
-
-  if (bsize < s_toget)
-    s_toget = bsize;
-
-  memcpy(buf, (m_wback+m_wbackcur), s_toget);
-
-  m_wbackcur += s_toget;
-  if (m_wbackcur == m_wbacksize) {
-    free(m_wback);
-    m_wback = (char *)NULL;
-    m_wbacksize = 0;
-    m_wbackcur = 0;
-  }
-    
-  return s_toget;
-}
-
 bool wxStreamBuffer::FillBuffer()
 {
   size_t count;
@@ -232,8 +186,8 @@ void wxStreamBuffer::PutChar(char c)
     return;
   }
 
-  if (!GetDataLeft() && !FlushBuffer()) {
-    m_stream->m_lasterror = wxStream_EOF;
+  if (GetDataLeft() == 0 && !FlushBuffer()) {
+    CHECK_ERROR(wxStream_WRITE_ERR);
     return;
   }
 
@@ -241,6 +195,23 @@ void wxStreamBuffer::PutChar(char c)
   m_stream->m_lastcount = 1;
 }
 
+char wxStreamBuffer::Peek()
+{
+  char c;
+
+  wxASSERT(m_stream != NULL && m_buffer_size != 0);
+
+  if (!GetDataLeft()) {
+    CHECK_ERROR(wxStream_READ_ERR);
+    return 0;
+  }
+
+  GetFromBuffer(&c, 1);
+  m_buffer_pos--;
+
+  return c;
+}
+
 char wxStreamBuffer::GetChar()
 {
   char c;
@@ -253,11 +224,12 @@ char wxStreamBuffer::GetChar()
   }
 
   if (!GetDataLeft()) {
-    m_stream->m_lasterror = wxStream_EOF;
+    CHECK_ERROR(wxStream_READ_ERR);
     return 0;
   }
 
   GetFromBuffer(&c, 1);
+  
   m_stream->m_lastcount = 1;
   return c;
 }
@@ -266,20 +238,16 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
 {
   wxASSERT(m_stream != NULL);
 
+  if (m_mode == write)
+    return 0;
+
   // ------------------
   // Buffering disabled
   // ------------------
 
-  m_stream->m_lastcount = GetWBack((char *)buffer, size);
-  size -= m_stream->m_lastcount;
-  if (size == 0)
-    return m_stream->m_lastcount;
-
-  buffer = (void *)((char *)buffer+m_stream->m_lastcount);
-
-  if (!m_buffer_size) {
+  m_stream->m_lasterror = wxStream_NOERROR;
+  if (!m_buffer_size)
     return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
-  }
 
   // -----------------
   // Buffering enabled
@@ -297,8 +265,7 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
 
       if (!FillBuffer()) {
-        if (m_stream->m_lasterror == wxStream_NOERROR)
-          m_stream->m_lasterror = wxStream_EOF;
+        CHECK_ERROR(wxStream_EOF);
         return (m_stream->m_lastcount = orig_size-size);
       }
     } else {
@@ -316,7 +283,10 @@ size_t wxStreamBuffer::Read(wxStreamBuffer *s_buf)
   char buf[BUF_TEMP_SIZE];
   size_t s = 0, bytes_read = BUF_TEMP_SIZE;
 
-  while (bytes_read == BUF_TEMP_SIZE) {
+  if (m_mode == write)
+    return 0;
+
+  while (bytes_read != 0) {
     bytes_read = Read(buf, bytes_read);
     bytes_read = s_buf->Write(buf, bytes_read);
     s += bytes_read;
@@ -328,10 +298,14 @@ size_t wxStreamBuffer::Write(const void *buffer, size_t size)
 {
   wxASSERT(m_stream != NULL);
 
+  if (m_mode == read)
+    return 0;
+
   // ------------------
   // Buffering disabled
   // ------------------
 
+  m_stream->m_lasterror = wxStream_NOERROR;
   if (!m_buffer_size)
     return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
 
@@ -352,8 +326,7 @@ size_t wxStreamBuffer::Write(const void *buffer, size_t size)
       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
 
       if (!FlushBuffer()) {
-        if (m_stream->m_lasterror == wxStream_NOERROR)
-          m_stream->m_lasterror = wxStream_EOF;
+	CHECK_ERROR(wxStream_WRITE_ERR);
         return (m_stream->m_lastcount = orig_size-size);
       }
 
@@ -372,13 +345,19 @@ size_t wxStreamBuffer::Write(const void *buffer, size_t size)
 size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
 {
   char buf[BUF_TEMP_SIZE];
-  size_t s = 0, bytes_count = BUF_TEMP_SIZE;
+  size_t s = 0, bytes_count = BUF_TEMP_SIZE, b_count2;
+  wxInputStream *in_stream;
+
+  if (m_mode == read)
+    return 0;
+
+  in_stream = (wxInputStream *)sbuf->Stream();
 
   while (bytes_count == BUF_TEMP_SIZE) {
-    if (m_stream->StreamSize() < bytes_count)
-      bytes_count = m_stream->StreamSize();
-    bytes_count = sbuf->Read(buf, bytes_count);
-    bytes_count = Write(buf, bytes_count);
+    b_count2 = sbuf->Read(buf, bytes_count);
+    bytes_count = Write(buf, b_count2);
+    if (b_count2 > bytes_count)
+      in_stream->Ungetch(buf+bytes_count, b_count2-bytes_count);
     s += bytes_count;
   }
   return s;
@@ -409,7 +388,9 @@ off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
     diff = pos + GetIntPosition();
 
     if ( (diff > last_access) || (diff < 0) ) {
-      ret_off = m_stream->OnSysSeek(pos, wxFromCurrent);
+      // We must take into account the fact that we have read something
+      // previously.
+      ret_off = m_stream->OnSysSeek(diff-last_access, wxFromCurrent);
       ResetBuffer();
       return ret_off;
     } else {
@@ -485,47 +466,124 @@ off_t wxStreamBase::OnSysTell() const
 // ----------------------------------------------------------------------------
 
 wxInputStream::wxInputStream()
-  : wxStreamBase()
+  : wxStreamBase(),
+    m_wback(NULL), m_wbacksize(0), m_wbackcur(0)
 {
-  m_i_destroybuf = TRUE;
-  m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
 }
 
-wxInputStream::wxInputStream(wxStreamBuffer *buffer)
-  : wxStreamBase()
+wxInputStream::~wxInputStream()
 {
-  m_i_destroybuf = FALSE;
-  m_i_streambuf = buffer;
+  if (m_wback)
+    free(m_wback);
 }
 
-wxInputStream::~wxInputStream()
+char *wxInputStream::AllocSpaceWBack(size_t needed_size)
+{
+  char *temp_b;
+  size_t old_size;
+
+  old_size = m_wbacksize;
+  m_wbacksize += needed_size;
+
+  if (!m_wback)
+    temp_b = (char *)malloc(m_wbacksize);
+  else
+    temp_b = (char *)realloc(m_wback, m_wbacksize);
+
+  if (!temp_b)
+    return NULL;
+  m_wback = temp_b;
+  m_wbackcur += needed_size;
+
+  memmove(m_wback+needed_size, m_wback, old_size);
+  
+  return (char *)(m_wback);
+}
+
+size_t wxInputStream::GetWBack(char *buf, size_t bsize)
+{
+  size_t s_toget = m_wbackcur;
+
+  if (!m_wback)
+    return 0;
+
+  if (bsize < s_toget)
+    s_toget = bsize;
+
+  memcpy(buf, (m_wback+m_wbackcur-bsize), s_toget);
+
+  m_wbackcur -= s_toget;
+  if (m_wbackcur == 0) {
+    free(m_wback);
+    m_wback = (char *)NULL;
+    m_wbacksize = 0;
+    m_wbackcur = 0;
+  }
+    
+  return s_toget;
+}
+
+size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
 {
-  if (m_i_destroybuf)
-    delete m_i_streambuf;
+  char *ptrback;
+
+  ptrback = AllocSpaceWBack(bufsize);
+  if (!ptrback)
+    return 0;
+
+  memcpy(ptrback, buf, bufsize);
+  return bufsize;
+}
+
+bool wxInputStream::Ungetch(char c)
+{
+  char *ptrback;
+
+  ptrback = AllocSpaceWBack(1);
+  if (!ptrback)
+    return FALSE;
+
+  *ptrback = c;
+  return TRUE;
 }
 
 char wxInputStream::GetC()
 {
   char c;
-  m_i_streambuf->Read(&c, 1);
+  Read(&c, 1);
   return c;
 }
 
 wxInputStream& wxInputStream::Read(void *buffer, size_t size)
 {
-  m_i_streambuf->Read(buffer, size);
-  // wxStreamBuffer sets all variables for us
+  size_t retsize;
+  char *buf = (char *)buffer;
+
+  retsize = GetWBack(buf, size);
+  if (retsize == size) {
+    m_lastcount = size;
+    m_lasterror = wxStream_NOERROR;
+    return *this;
+  }
+  size     -= retsize;
+  buf      += retsize;
+
+  m_lastcount = OnSysRead(buf, size);
   return *this;
 }
 
 char wxInputStream::Peek()
 {
-  m_i_streambuf->GetDataLeft();
+  char c;
 
-  return *(m_i_streambuf->GetBufferPos());
+  Read(&c, 1);
+  if (m_lasterror == wxStream_NOERROR) {
+    Ungetch(c);
+    return c;
+  }
+  return 0;
 }
 
-
 wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
 {
   char buf[BUF_TEMP_SIZE]; 
@@ -540,272 +598,278 @@ wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
 
 off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
 {
-  return m_i_streambuf->Seek(pos, mode);
+  //should be check and improve, just to remove a slight bug !
+  // I don't know whether it should be put as well in wxFileInputStream::OnSysSeek ?
+  if (m_lasterror==wxSTREAM_EOF) m_lasterror=wxSTREAM_NOERROR;
+
+  return OnSysSeek(pos, mode);
 }
 
 off_t wxInputStream::TellI() const
 {
-  return m_i_streambuf->Tell();
+  return OnSysTell();
 }
 
 // --------------------
 // Overloaded operators
 // --------------------
 
-wxInputStream& wxInputStream::operator>>(wxString& line)
+#if wxUSE_SERIAL
+wxInputStream& wxInputStream::operator>>(wxObject *& obj)
 {
-  wxDataInputStream s(*this);
-
-  line = s.ReadLine();
+  wxObjectInputStream obj_s(*this);
+  obj = obj_s.LoadObject();
   return *this;
 }
+#endif
+
 
-wxInputStream& wxInputStream::operator>>(char& c)
+// ----------------------------------------------------------------------------
+// wxOutputStream
+// ----------------------------------------------------------------------------
+wxOutputStream::wxOutputStream()
+  : wxStreamBase()
 {
-  c = GetC();
-  return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(short& i)
+wxOutputStream::~wxOutputStream()
 {
-  long l;
+}
 
-  *this >> l;
-  i = (short)l;
+wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
+{
+  m_lastcount = OnSysWrite(buffer, size);
   return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(int& i)
+wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
 {
-  long l;
-
-  *this >> l;
-  i = (short)l;
+  stream_in.Read(*this);
   return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(long& i)
+off_t wxOutputStream::TellO() const
 {
-  /* I only implemented a simple integer parser */
-  int c, sign;
-
-  while (isspace( c = GetC() ) )
-     /* Do nothing */ ;
+  return OnSysTell();
+}
 
-  i = 0;
-  if (! (c == '-' || isdigit(c)) ) {
-    InputStreamBuffer()->WriteBack(c);
-    return *this;
-  }
+off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+{
+  return OnSysSeek(pos, mode);
+}
 
-  if (c == '-') {
-    sign = -1;
-    c = GetC();
-  } else
-    sign = 1;
+void wxOutputStream::Sync()
+{
+}
 
-  while (isdigit(c)) {
-    i = i*10 + c;
-    c = GetC();
-  }
+#if wxUSE_SERIAL
+wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+{
+  wxObjectOutputStream obj_s(*this);
+  obj_s.SaveObject(obj);
+  return *this;
+}
+#endif
 
-  i *= sign;
+// ----------------------------------------------------------------------------
+// wxCountingOutputStream
+// ----------------------------------------------------------------------------
 
-  return *this;
+wxCountingOutputStream::wxCountingOutputStream ()
+  : wxOutputStream()
+{
+   m_currentPos = 0;
 }
 
-wxInputStream& wxInputStream::operator>>(double& f)
+size_t wxCountingOutputStream::GetSize() const
 {
-  /* I only implemented a simple float parser */
-  int c, sign;
+  return m_lastcount;
+}
 
-  while (isspace( c = GetC() ) )
-     /* Do nothing */ ;
+size_t wxCountingOutputStream::OnSysWrite(const void *WXUNUSED(buffer), size_t size)
+{
+  m_currentPos += size;
+  if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
+  return m_currentPos;
+}
 
-  f = 0.0;
-  if (! (c == '-' || isdigit(c)) ) {
-    InputStreamBuffer()->WriteBack(c);
-    return *this;
+off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+{
+  if (mode == wxFromStart)
+  {
+    m_currentPos = pos;
   }
-
-  if (c == '-') {
-    sign = -1;
-    c = GetC();
-  } else
-    sign = 1;
-
-  while (isdigit(c)) {
-    f = f*10 + (c - '0');
-    c = GetC();
+  if (mode == wxFromEnd)
+  {
+    m_currentPos = m_lastcount + pos;
   }
-
-  if (c == '.') {
-    double f_multiplicator = (double) 0.1;
-    c = GetC();
-
-    while (isdigit(c)) {
-      f += (c-'0')*f_multiplicator;
-      f_multiplicator /= 10;
-      c = GetC();
-    }
+  else
+  {
+    m_currentPos += pos;
   }
-
-  f *= sign;
-
-  return *this;
+  if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
+  
+  return m_currentPos;  // ?
 }
 
-#if wxUSE_SERIAL
-wxInputStream& wxInputStream::operator>>(wxObject *& obj)
+off_t wxCountingOutputStream::OnSysTell() const
 {
-  wxObjectInputStream obj_s(*this);
-  obj = obj_s.LoadObject();
-  return *this;
+  return m_currentPos;  // ?
 }
-#endif
-
-
+  
 // ----------------------------------------------------------------------------
-// wxOutputStream
+// wxFilterInputStream
 // ----------------------------------------------------------------------------
-wxOutputStream::wxOutputStream()
-  : wxStreamBase()
+
+wxFilterInputStream::wxFilterInputStream()
+  : wxInputStream()
 {
-  m_o_destroybuf = TRUE;
-  m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
 }
 
-wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
-  : wxStreamBase()
+wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+  : wxInputStream()
 {
-  m_o_destroybuf = FALSE;
-  m_o_streambuf = buffer;
+  m_parent_i_stream = &stream;
 }
 
-wxOutputStream::~wxOutputStream()
+wxFilterInputStream::~wxFilterInputStream()
 {
-  if (m_o_destroybuf)
-    delete m_o_streambuf;
 }
 
-wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
+// ----------------------------------------------------------------------------
+// wxFilterOutputStream
+// ----------------------------------------------------------------------------
+wxFilterOutputStream::wxFilterOutputStream()
+  : wxOutputStream()
 {
-  m_o_streambuf->Write(buffer, size);
-  return *this;
 }
 
-wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
+wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+  : wxOutputStream()
 {
-  stream_in.Read(*this);
-  return *this;
+  m_parent_o_stream = &stream;
 }
 
-off_t wxOutputStream::TellO() const
+wxFilterOutputStream::~wxFilterOutputStream()
 {
-  return m_o_streambuf->Tell();
 }
 
-off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+// ----------------------------------------------------------------------------
+// wxBufferedInputStream
+// ----------------------------------------------------------------------------
+wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s)
+  : wxFilterInputStream(s)
 {
-  return m_o_streambuf->Seek(pos, mode);
+  m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
+  m_i_streambuf->SetBufferIO(1024);
 }
 
-void wxOutputStream::Sync()
+wxBufferedInputStream::~wxBufferedInputStream()
 {
-  m_o_streambuf->FlushBuffer();
+  delete m_i_streambuf;
 }
 
-wxOutputStream& wxOutputStream::operator<<(const char *string)
+char wxBufferedInputStream::Peek()
 {
-  return Write(string, strlen(string));
+  return m_i_streambuf->Peek();
 }
 
-wxOutputStream& wxOutputStream::operator<<(wxString& string)
+wxInputStream& wxBufferedInputStream::Read(void *buffer, size_t size)
 {
-  return Write(string, string.Len());
+  size_t retsize;
+  char *buf = (char *)buffer;
+
+  retsize = GetWBack(buf, size);
+  m_lastcount = retsize;
+  if (retsize == size) {
+    m_lasterror = wxStream_NOERROR;
+    return *this;
+  }
+  size     -= retsize;
+  buf      += retsize;
+
+  m_i_streambuf->Read(buf, size);
+
+  return *this;
 }
 
-wxOutputStream& wxOutputStream::operator<<(char c)
+off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
 {
-  return Write(&c, 1);
+  return m_i_streambuf->Seek(pos, mode);
 }
 
-wxOutputStream& wxOutputStream::operator<<(short i)
+off_t wxBufferedInputStream::TellI() const
 {
-  wxString strint;
-
-  strint.Printf("%i", i);
-  return Write(strint, strint.Len());
+  return m_i_streambuf->Tell();
 }
 
-wxOutputStream& wxOutputStream::operator<<(int i)
+size_t wxBufferedInputStream::OnSysRead(void *buffer, size_t bufsize)
 {
-  wxString strint;
-
-  strint.Printf("%i", i);
-  return Write(strint, strint.Len());
+  return m_parent_i_stream->Read(buffer, bufsize).LastRead();
 }
 
-wxOutputStream& wxOutputStream::operator<<(long i)
+off_t wxBufferedInputStream::OnSysSeek(off_t seek, wxSeekMode mode)
 {
-  wxString strlong;
+  return m_parent_i_stream->SeekI(seek, mode);
+}
 
-  strlong.Printf("%i", i);
-  return Write((const char *)strlong, strlong.Len());
+off_t wxBufferedInputStream::OnSysTell() const
+{
+  return m_parent_i_stream->TellI();
 }
 
-wxOutputStream& wxOutputStream::operator<<(double f)
+// ----------------------------------------------------------------------------
+// wxBufferedOutputStream
+// ----------------------------------------------------------------------------
+
+wxBufferedOutputStream::wxBufferedOutputStream(wxOutputStream& s)
+  : wxFilterOutputStream(s)
 {
-  wxString strfloat;
+  m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
+  m_o_streambuf->SetBufferIO(1024);
+}
 
-  strfloat.Printf("%f", f);
-  return Write(strfloat, strfloat.Len());
+wxBufferedOutputStream::~wxBufferedOutputStream()
+{
+  delete m_o_streambuf;
 }
 
-#if wxUSE_SERIAL
-wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
 {
-  wxObjectOutputStream obj_s(*this);
-  obj_s.SaveObject(obj);
+  m_lastcount = 0;
+  m_o_streambuf->Write(buffer, size);
   return *this;
 }
-#endif
 
-// ----------------------------------------------------------------------------
-// wxFilterInputStream
-// ----------------------------------------------------------------------------
-wxFilterInputStream::wxFilterInputStream()
-  : wxInputStream(NULL)
+off_t wxBufferedOutputStream::SeekO(off_t pos, wxSeekMode mode)
 {
-  // WARNING streambuf set to NULL !
+  return m_o_streambuf->Seek(pos, mode);
 }
 
-wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
-  : wxInputStream(stream.InputStreamBuffer())
+off_t wxBufferedOutputStream::TellO() const
 {
-  m_parent_i_stream = &stream;
+  return m_o_streambuf->Tell();
 }
 
-wxFilterInputStream::~wxFilterInputStream()
+void wxBufferedOutputStream::Sync()
 {
+  m_o_streambuf->FlushBuffer();
+  m_parent_o_stream->Sync();
 }
 
-// ----------------------------------------------------------------------------
-// wxFilterOutputStream
-// ----------------------------------------------------------------------------
-wxFilterOutputStream::wxFilterOutputStream()
-  : wxOutputStream(NULL)
+size_t wxBufferedOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
 {
+  return m_parent_o_stream->Write(buffer, bufsize).LastWrite();
 }
 
-wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
-  : wxOutputStream(stream.OutputStreamBuffer())
+off_t wxBufferedOutputStream::OnSysSeek(off_t seek, wxSeekMode mode)
 {
-  m_parent_o_stream = &stream;
+  return m_parent_o_stream->SeekO(seek, mode);
 }
 
-wxFilterOutputStream::~wxFilterOutputStream()
+off_t wxBufferedOutputStream::OnSysTell() const
 {
+  return m_parent_o_stream->TellO();
 }
 
 // ----------------------------------------------------------------------------
@@ -816,7 +880,14 @@ wxOutputStream& wxEndL(wxOutputStream& stream)
 {
 #ifdef __MSW__
   return stream.Write("\r\n", 2);
+#else
+#ifdef __WXMAC__
+  return stream.Write("\r", 1);
 #else
   return stream.Write("\n", 1);
 #endif
+#endif
 }
+
+#endif
+  // wxUSE_STREAMS