X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1e3eca9d3782d5eed5ba8d8019548c9f82523517..929eed47994d715f3ffccbdf47768a13171da968:/src/common/stream.cpp

diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index 4d32e503ea..81339e6bfb 100644
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -27,9 +27,9 @@
 #if wxUSE_STREAMS
 
 #include <ctype.h>
-#include <wx/stream.h>
-#include <wx/datstrm.h>
-#include <wx/objstrm.h>
+#include "wx/stream.h"
+#include "wx/datstrm.h"
+#include "wx/objstrm.h"
 
 #define BUF_TEMP_SIZE 10000
 
@@ -43,16 +43,14 @@
 
 wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
   : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
-    m_buffer_size(0), m_wback(NULL), m_wbacksize(0), m_wbackcur(0),
-    m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
+    m_buffer_size(0), m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
     m_mode(mode), m_destroybuf(FALSE), m_destroystream(FALSE)
 {
 }
 
 wxStreamBuffer::wxStreamBuffer(BufMode mode)
   : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
-    m_buffer_size(0), m_wback(NULL), m_wbacksize(0), m_wbackcur(0),
-    m_fixed(TRUE), m_flushable(FALSE), m_stream(NULL),
+    m_buffer_size(0), m_fixed(TRUE), m_flushable(FALSE), m_stream(NULL),
     m_mode(mode), m_destroybuf(FALSE), m_destroystream(TRUE)
 {
   m_stream = new wxStreamBase();
@@ -70,48 +68,16 @@ wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
   m_mode = buffer.m_mode;
   m_destroybuf = FALSE;
   m_destroystream = FALSE;
-  m_wback = NULL;
-  m_wbacksize = 0;
-  m_wbackcur = 0;
 }
 
 wxStreamBuffer::~wxStreamBuffer()
 {
-  if (m_wback)
-    free(m_wback);
   if (m_destroybuf)
     wxDELETEA(m_buffer_start);
   if (m_destroystream)
     delete m_stream;
 }
 
-size_t wxStreamBuffer::WriteBack(const char *buf, size_t bufsize)
-{
-  char *ptrback;
-
-  if (m_mode != read)
-    return 0;
-
-  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)
@@ -148,50 +114,12 @@ void wxStreamBuffer::ResetBuffer()
 {
   m_stream->m_lasterror = wxStream_NOERROR;
   m_stream->m_lastcount = 0;
-  if (m_mode == read)
+  if (m_mode == read && m_flushable)
     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;
-  m_wback = temp_b;
-  
-  return (char *)(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;
@@ -237,10 +165,17 @@ void wxStreamBuffer::PutToBuffer(const void *buffer, size_t size)
   size_t s_toput = m_buffer_end-m_buffer_pos;
 
   if (s_toput < size && !m_fixed) {
-    m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
-    // I round a bit
-    m_buffer_size += size;
-    m_buffer_end = m_buffer_start+m_buffer_size;
+    if (!m_buffer_start)
+      SetBufferIO(size);
+    else {
+      size_t delta = m_buffer_pos-m_buffer_start;
+
+      m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
+      m_buffer_pos   = m_buffer_start + delta;
+      // I round a bit
+      m_buffer_size += size;
+      m_buffer_end   = m_buffer_start+m_buffer_size;
+    }
     s_toput = size;
   }
   if (s_toput > size)
@@ -267,6 +202,23 @@ 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;
@@ -301,13 +253,6 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
   // ------------------
 
   m_stream->m_lasterror = wxStream_NOERROR;
-  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)
     return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
 
@@ -327,7 +272,7 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
 
       if (!FillBuffer()) {
-        CHECK_ERROR(wxStream_READ_ERR);
+        CHECK_ERROR(wxStream_EOF);
         return (m_stream->m_lastcount = orig_size-size);
       }
     } else {
@@ -368,7 +313,7 @@ size_t wxStreamBuffer::Write(const void *buffer, size_t size)
   // ------------------
 
   m_stream->m_lasterror = wxStream_NOERROR;
-  if (!m_buffer_size)
+  if (!m_buffer_size && m_fixed)
     return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
 
   // ------------------
@@ -382,7 +327,9 @@ size_t wxStreamBuffer::Write(const void *buffer, size_t size)
 
     // First case: the buffer to write is larger than the stream buffer,
     //             we split it
-    if (size > buf_left) {
+    // NB: If stream buffer isn't fixed (as for wxMemoryOutputStream),
+    // we always go to the second case.
+    if (size > buf_left && m_fixed) {
       PutToBuffer(buffer, buf_left);
       size -= buf_left;
       buffer = (char *)buffer + buf_left; // ANSI C++ violation.
@@ -408,15 +355,18 @@ size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
 {
   char buf[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) {
     b_count2 = sbuf->Read(buf, bytes_count);
     bytes_count = Write(buf, b_count2);
     if (b_count2 > bytes_count)
-      sbuf->WriteBack(buf+bytes_count, b_count2-bytes_count);
+      in_stream->Ungetch(buf+bytes_count, b_count2-bytes_count);
     s += bytes_count;
   }
   return s;
@@ -447,7 +397,9 @@ 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 {
@@ -523,79 +475,123 @@ 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)
 {
-  if (m_i_destroybuf)
-    delete m_i_streambuf;
+  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;
+
+  memmove(m_wback+needed_size, m_wback, old_size);
+  
+  return (char *)(m_wback);
 }
 
-char wxInputStream::GetC()
+size_t wxInputStream::GetWBack(char *buf, size_t bsize)
 {
-  char c;
-  m_i_streambuf->Read(&c, 1);
-  return c;
+  size_t s_toget = m_wbacksize-m_wbackcur;
+
+  if (!m_wback)
+    return 0;
+
+  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;
 }
 
+size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
+{
+  char *ptrback;
+
+  ptrback = AllocSpaceWBack(bufsize);
+  if (!ptrback)
+    return 0;
+
+  memcpy(ptrback, buf, bufsize);
+  return bufsize;
+}
 
-wxString wxInputStream::ReadLine()
+bool wxInputStream::Ungetch(char c)
 {
-  char c, last_endl = 0;
-  bool end_line = FALSE;
-  wxString line;
+  char *ptrback;
 
-  while (!end_line) {
-    c = GetC();
-    if (LastError() != wxStream_NOERROR)
-      break;
+  ptrback = AllocSpaceWBack(1);
+  if (!ptrback)
+    return FALSE;
 
-    switch (c) {
-    case '\n':
-      end_line = TRUE;
-      break;
-    case '\r':
-      last_endl = '\r';
-      break;
-    default:
-      if (last_endl == '\r') {
-        end_line = TRUE;
-        InputStreamBuffer()->WriteBack(c);
-        break;
-      }
-      line += c;
-      break;
-    } 
-  }
-  return line;
+  *ptrback = c;
+  return TRUE;
+}
+
+char wxInputStream::GetC()
+{
+  char c;
+  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]; 
@@ -610,353 +606,278 @@ 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)
 {
-  line = ReadLine();
+  wxObjectInputStream obj_s(*this);
+  obj = obj_s.LoadObject();
   return *this;
 }
+#endif
 
-wxInputStream& wxInputStream::operator>>(char& c)
-{
-  c = GetC();
-  return *this;
-}
 
-wxInputStream& wxInputStream::operator>>(signed short& i)
+// ----------------------------------------------------------------------------
+// wxOutputStream
+// ----------------------------------------------------------------------------
+wxOutputStream::wxOutputStream()
+  : wxStreamBase()
 {
-  signed long l;
-
-  *this >> l;
-  i = (signed short)l;
-  return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(signed int& i)
+wxOutputStream::~wxOutputStream()
 {
-  signed long l;
-
-  *this >> l;
-  i = (signed int)l;
-  return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(signed long& i)
+wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
 {
-  /* I only implemented a simple integer parser */
-  int c; 
-  int sign;
-
-  while (isspace( c = GetC() ) )
-     /* Do nothing */ ;
-
-  i = 0;
-  if (! (c == '-' || isdigit(c)) ) {
-    InputStreamBuffer()->WriteBack(c);
-    return *this;
-  }
-
-  if (c == '-') {
-    sign = -1;
-    c = GetC();
-  } else if (c == '+') {
-    sign = 1;
-    c = GetC();
-  } else {
-    sign = 1;
-  }
-
-  while (isdigit(c)) {
-    i = i*10 + (c - (int)'0');
-    c = GetC();
-  }
-
-  i *= sign;
-
+  m_lastcount = OnSysWrite(buffer, size);
   return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(unsigned short& i)
+wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
 {
-  unsigned long l;
-
-  *this >> l;
-  i = (unsigned short)l;
+  stream_in.Read(*this);
   return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(unsigned int& i)
+off_t wxOutputStream::TellO() const
 {
-  unsigned long l;
-
-  *this >> l;
-  i = (unsigned int)l;
-  return *this;
+  return OnSysTell();
 }
 
-wxInputStream& wxInputStream::operator>>(unsigned long& i)
+off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
 {
-  /* I only implemented a simple integer parser */
-  int c;
-
-  while (isspace( c = GetC() ) )
-     /* Do nothing */ ;
-
-  i = 0;
-  if (!isdigit(c)) {
-    InputStreamBuffer()->WriteBack(c);
-    return *this;
-  }
-
-  while (isdigit(c)) {
-    i = i*10 + c - '0';
-    c = GetC();
-  }
-
-  return *this;
+  return OnSysSeek(pos, mode);
 }
 
-wxInputStream& wxInputStream::operator>>(double& f)
+void wxOutputStream::Sync()
 {
-  /* I only implemented a simple float parser */
-  int c, sign;
-
-  while (isspace( c = GetC() ) )
-     /* Do nothing */ ;
-
-  f = 0.0;
-  if (! (c == '-' || isdigit(c)) ) {
-    InputStreamBuffer()->WriteBack(c);
-    return *this;
-  }
-
-  if (c == '-') {
-    sign = -1;
-    c = GetC();
-  } else if (c == '+') {
-    sign = 1;
-    c = GetC();
-  } else {
-    sign = 1;
-  }
-
-  while (isdigit(c)) {
-    f = f*10 + (c - '0');
-    c = GetC();
-  }
-
-  if (c == '.') {
-    double f_multiplicator = (double) 0.1;
-    c = GetC();
-
-    while (isdigit(c)) {
-      f += (c-'0')*f_multiplicator;
-      f_multiplicator /= 10;
-      c = GetC();
-    }
-  }
-
-  f *= sign;
-
-  return *this;
 }
 
 #if wxUSE_SERIAL
-wxInputStream& wxInputStream::operator>>(wxObject *& obj)
+wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
 {
-  wxObjectInputStream obj_s(*this);
-  obj = obj_s.LoadObject();
+  wxObjectOutputStream obj_s(*this);
+  obj_s.SaveObject(obj);
   return *this;
 }
 #endif
 
-
 // ----------------------------------------------------------------------------
-// wxOutputStream
+// wxCountingOutputStream
 // ----------------------------------------------------------------------------
-wxOutputStream::wxOutputStream()
-  : wxStreamBase()
+
+wxCountingOutputStream::wxCountingOutputStream ()
+  : wxOutputStream()
 {
-  m_o_destroybuf = TRUE;
-  m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
+   m_currentPos = 0;
 }
 
-wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
-  : wxStreamBase()
+size_t wxCountingOutputStream::GetSize() const
 {
-  m_o_destroybuf = FALSE;
-  m_o_streambuf = buffer;
+  return m_lastcount;
 }
 
-wxOutputStream::~wxOutputStream()
+size_t wxCountingOutputStream::OnSysWrite(const void *WXUNUSED(buffer), size_t size)
 {
-  if (m_o_destroybuf)
-    delete m_o_streambuf;
+  m_currentPos += size;
+  if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
+  return m_currentPos;
 }
 
-wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
+off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
 {
-  m_o_streambuf->Write(buffer, size);
-  return *this;
+  if (mode == wxFromStart)
+  {
+    m_currentPos = pos;
+  }
+  if (mode == wxFromEnd)
+  {
+    m_currentPos = m_lastcount + pos;
+  }
+  else
+  {
+    m_currentPos += pos;
+  }
+  if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
+  
+  return m_currentPos;  // ?
 }
 
-wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
+off_t wxCountingOutputStream::OnSysTell() const
 {
-  stream_in.Read(*this);
-  return *this;
+  return m_currentPos;  // ?
 }
+  
+// ----------------------------------------------------------------------------
+// wxFilterInputStream
+// ----------------------------------------------------------------------------
 
-off_t wxOutputStream::TellO() const
+wxFilterInputStream::wxFilterInputStream()
+  : wxInputStream()
 {
-  return m_o_streambuf->Tell();
 }
 
-off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+  : wxInputStream()
 {
-  return m_o_streambuf->Seek(pos, mode);
+  m_parent_i_stream = &stream;
 }
 
-void wxOutputStream::Sync()
+wxFilterInputStream::~wxFilterInputStream()
 {
-  m_o_streambuf->FlushBuffer();
 }
 
-void wxOutputStream::WriteLine(const wxString& line)
+// ----------------------------------------------------------------------------
+// wxFilterOutputStream
+// ----------------------------------------------------------------------------
+wxFilterOutputStream::wxFilterOutputStream()
+  : wxOutputStream()
 {
-#ifdef __WXMSW__
-  wxString tmp_string = line + _T("\r\n");
-#else
-#ifdef __WXMAC__
-  wxString tmp_string = line + _T('\r');
-#else
-  wxString tmp_string = line + _T('\n');
-#endif
-#endif
+}
 
-  Write((const wxChar *) tmp_string, tmp_string.Length()*sizeof(wxChar));
+wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+  : wxOutputStream()
+{
+  m_parent_o_stream = &stream;
 }
 
-wxOutputStream& wxOutputStream::operator<<(const char *string)
+wxFilterOutputStream::~wxFilterOutputStream()
 {
-  return Write(string, strlen(string));
 }
 
-wxOutputStream& wxOutputStream::operator<<(wxString& string)
+// ----------------------------------------------------------------------------
+// wxBufferedInputStream
+// ----------------------------------------------------------------------------
+wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s)
+  : wxFilterInputStream(s)
 {
-#if wxUSE_UNICODE
-  const wxWX2MBbuf buf = string.mb_str();
-  return *this << buf;
-#else
-  return Write(string, string.Len());
-#endif
+  m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
+  m_i_streambuf->SetBufferIO(1024);
 }
 
-wxOutputStream& wxOutputStream::operator<<(char c)
+wxBufferedInputStream::~wxBufferedInputStream()
 {
-  return Write(&c, 1);
+  delete m_i_streambuf;
 }
 
-wxOutputStream& wxOutputStream::operator<<(signed short i)
+char wxBufferedInputStream::Peek()
 {
-  signed long l = (signed long)i;
-  return *this << l;
+  return m_i_streambuf->Peek();
 }
 
-wxOutputStream& wxOutputStream::operator<<(signed int i)
+wxInputStream& wxBufferedInputStream::Read(void *buffer, size_t size)
 {
-  signed long l = (signed long)i;
-  return *this << l;
+  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<<(signed long i)
+off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
 {
-  wxString strlong;
-  strlong.Printf(_T("%ld"), i);
-  return *this << strlong;
+  return m_i_streambuf->Seek(pos, mode);
+}
+
+off_t wxBufferedInputStream::TellI() const
+{
+  return m_i_streambuf->Tell();
 }
 
-wxOutputStream& wxOutputStream::operator<<(unsigned short i)
+size_t wxBufferedInputStream::OnSysRead(void *buffer, size_t bufsize)
 {
-  unsigned long l = (unsigned long)i;
-  return *this << l;
+  return m_parent_i_stream->Read(buffer, bufsize).LastRead();
 }
 
-wxOutputStream& wxOutputStream::operator<<(unsigned int i)
+off_t wxBufferedInputStream::OnSysSeek(off_t seek, wxSeekMode mode)
 {
-  unsigned long l = (unsigned long)i;
-  return *this << l;
+  return m_parent_i_stream->SeekI(seek, mode);
 }
 
-wxOutputStream& wxOutputStream::operator<<(unsigned long i)
+off_t wxBufferedInputStream::OnSysTell() const
 {
-  wxString strlong;
-  strlong.Printf(_T("%lu"), i);
-  return *this << strlong;
+  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(_T("%f"), f);
-  return *this << strfloat;
+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();
 }
 
 // ----------------------------------------------------------------------------