made wxTextFile work in Unicode; also made it possible to use it with non seekable...

[wxWidgets.git] / src / common / stream.cpp

diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index 90833f4c916c0f06858e377e7beef28fbbf32bb3..73dde47896f15a1c358f7d203881d98ec6d6ffe2 100644 (file)
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -7,7 +7,7 @@
 // Created:     11/07/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux
 // Created:     11/07/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux

-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================


@@ -18,10 +18,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "stream.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -70,14 +66,14 @@ void wxStreamBuffer::InitBuffer()
     m_buffer_size = 0;
 
     // if we are going to allocate the buffer, we should free it later as well
     m_buffer_size = 0;
 
     // if we are going to allocate the buffer, we should free it later as well

-    m_destroybuf = TRUE;
+    m_destroybuf = true;

 }
 
 void wxStreamBuffer::Init()
 {
     InitBuffer();
 
 }
 
 void wxStreamBuffer::Init()
 {
     InitBuffer();
 

-    m_fixed = TRUE;
+    m_fixed = true;

 }
 
 wxStreamBuffer::wxStreamBuffer(BufMode mode)
 }
 
 wxStreamBuffer::wxStreamBuffer(BufMode mode)


@@ -87,7 +83,7 @@ wxStreamBuffer::wxStreamBuffer(BufMode mode)
     m_stream = NULL;
     m_mode = mode;
 
     m_stream = NULL;
     m_mode = mode;
 

-    m_flushable = FALSE;
+    m_flushable = false;

 }
 
 wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
 }
 
 wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)


@@ -97,7 +93,7 @@ wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
     m_stream = &stream;
     m_mode = mode;
 
     m_stream = &stream;
     m_mode = mode;
 

-    m_flushable = TRUE;
+    m_flushable = true;

 }
 
 wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
 }
 
 wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)


@@ -115,13 +111,16 @@ wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
     m_flushable = buffer.m_flushable;
     m_stream = buffer.m_stream;
     m_mode = buffer.m_mode;
     m_flushable = buffer.m_flushable;
     m_stream = buffer.m_stream;
     m_mode = buffer.m_mode;

-    m_destroybuf = FALSE;
+    m_destroybuf = false;

 }
 
 void wxStreamBuffer::FreeBuffer()
 {
     if ( m_destroybuf )
 }
 
 void wxStreamBuffer::FreeBuffer()
 {
     if ( m_destroybuf )

+    {

         free(m_buffer_start);
         free(m_buffer_start);

+        m_buffer_start = NULL;
+    }

 }
 
 wxStreamBuffer::~wxStreamBuffer()
 }
 
 wxStreamBuffer::~wxStreamBuffer()


@@ -167,15 +166,15 @@ void wxStreamBuffer::SetBufferIO(void *start,
 
 void wxStreamBuffer::SetBufferIO(size_t bufsize)
 {
 
 void wxStreamBuffer::SetBufferIO(size_t bufsize)
 {

-    // start by freeing the old buffer
-    FreeBuffer();
-

     if ( bufsize )
     {
     if ( bufsize )
     {

-        SetBufferIO(malloc(bufsize), bufsize, TRUE /* take ownership */);
+        // this will free the old buffer and allocate the new one
+        SetBufferIO(malloc(bufsize), bufsize, true /* take ownership */);

     }
     else // no buffer size => no buffer
     {
     }
     else // no buffer size => no buffer
     {

+        // still free the old one
+        FreeBuffer();

         InitBuffer();
     }
 }
         InitBuffer();
     }
 }


@@ -198,41 +197,41 @@ bool wxStreamBuffer::FillBuffer()
 {
     wxInputStream *inStream = GetInputStream();
 
 {
     wxInputStream *inStream = GetInputStream();
 

-    // It's legal to have no stream, so we don't complain about it just return FALSE
+    // It's legal to have no stream, so we don't complain about it just return false

     if ( !inStream )
     if ( !inStream )

-        return FALSE;
+        return false;

 
     size_t count = inStream->OnSysRead(m_buffer_start, m_buffer_size);
     if ( !count )
 
     size_t count = inStream->OnSysRead(m_buffer_start, m_buffer_size);
     if ( !count )

-        return FALSE;
+        return false;

 
     m_buffer_end = m_buffer_start + count;
     m_buffer_pos = m_buffer_start;
 
 
     m_buffer_end = m_buffer_start + count;
     m_buffer_pos = m_buffer_start;
 

-    return TRUE;
+    return true;

 }
 
 // write the buffer contents to the stream (only for write buffers)
 bool wxStreamBuffer::FlushBuffer()
 {
 }
 
 // write the buffer contents to the stream (only for write buffers)
 bool wxStreamBuffer::FlushBuffer()
 {

-    wxCHECK_MSG( m_flushable, FALSE, _T("can't flush this buffer") );
+    wxCHECK_MSG( m_flushable, false, _T("can't flush this buffer") );

 
     // FIXME: what is this check for? (VZ)
     if ( m_buffer_pos == m_buffer_start )
 
     // FIXME: what is this check for? (VZ)
     if ( m_buffer_pos == m_buffer_start )

-        return FALSE;
+        return false;

 
     wxOutputStream *outStream = GetOutputStream();
 
 
     wxOutputStream *outStream = GetOutputStream();
 

-    wxCHECK_MSG( outStream, FALSE, _T("should have a stream in wxStreamBuffer") );
+    wxCHECK_MSG( outStream, false, _T("should have a stream in wxStreamBuffer") );

 
     size_t current = m_buffer_pos - m_buffer_start;
     size_t count = outStream->OnSysWrite(m_buffer_start, current);
     if ( count != current )
 
     size_t current = m_buffer_pos - m_buffer_start;
     size_t count = outStream->OnSysWrite(m_buffer_start, current);
     if ( count != current )

-        return FALSE;
+        return false;

 
     m_buffer_pos = m_buffer_start;
 
 
     m_buffer_pos = m_buffer_start;
 

-    return TRUE;
+    return true;

 }
 
 size_t wxStreamBuffer::GetDataLeft()
 }
 
 size_t wxStreamBuffer::GetDataLeft()


@@ -376,14 +375,14 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
     if ( m_stream )
         m_stream->Reset();
 
     if ( m_stream )
         m_stream->Reset();
 

-    size_t read;
+    size_t readBytes;

     if ( !HasBuffer() )
     {
         wxInputStream *inStream = GetInputStream();
 
         wxCHECK_MSG( inStream, 0, _T("should have a stream in wxStreamBuffer") );
 
     if ( !HasBuffer() )
     {
         wxInputStream *inStream = GetInputStream();
 
         wxCHECK_MSG( inStream, 0, _T("should have a stream in wxStreamBuffer") );
 

-        read = inStream->OnSysRead(buffer, size);
+        readBytes = inStream->OnSysRead(buffer, size);

     }
     else // we have a buffer, use it
     {
     }
     else // we have a buffer, use it
     {


@@ -414,13 +413,13 @@ size_t wxStreamBuffer::Read(void *buffer, size_t size)
             }
         }
 
             }
         }
 

-        read = orig_size - size;
+        readBytes = orig_size - size;

     }
 
     if ( m_stream )
     }
 
     if ( m_stream )

-        m_stream->m_lastcount = read;
+        m_stream->m_lastcount = readBytes;

 
 

-    return read;
+    return readBytes;

 }
 
 // this should really be called "Copy()"
 }
 
 // this should really be called "Copy()"


@@ -434,7 +433,7 @@ size_t wxStreamBuffer::Read(wxStreamBuffer *dbuf)
 
     do
     {
 
     do
     {

-        nRead = Read(dbuf, WXSIZEOF(buf));
+        nRead = Read(buf, WXSIZEOF(buf));

         if ( nRead )
         {
             nRead = dbuf->Write(buf, nRead);
         if ( nRead )
         {
             nRead = dbuf->Write(buf, nRead);


@@ -551,11 +550,11 @@ size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
     return total;
 }
 
     return total;
 }
 

-off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
+wxFileOffset wxStreamBuffer::Seek(wxFileOffset pos, wxSeekMode mode)

 {
 {

-    off_t ret_off, diff;
+    wxFileOffset ret_off, diff;

 
 

-    off_t last_access = GetLastAccess();
+    wxFileOffset last_access = GetLastAccess();

 
     if ( !m_flushable )
     {
 
     if ( !m_flushable )
     {


@@ -580,7 +579,9 @@ off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
         }
         if (diff < 0 || diff > last_access)
             return wxInvalidOffset;
         }
         if (diff < 0 || diff > last_access)
             return wxInvalidOffset;

-        SetIntPosition(diff);
+        size_t int_diff = wx_truncate_cast(size_t, diff);
+        wxCHECK_MSG( (wxFileOffset)int_diff == diff, wxInvalidOffset, wxT("huge file not supported") );
+        SetIntPosition(int_diff);

         return diff;
     }
 
         return diff;
     }
 


@@ -605,7 +606,9 @@ off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
             }
             else
             {
             }
             else
             {

-                SetIntPosition(diff);
+                size_t int_diff = wx_truncate_cast(size_t, diff);
+                wxCHECK_MSG( (wxFileOffset)int_diff == diff, wxInvalidOffset, wxT("huge file not supported") );
+                SetIntPosition(int_diff);

                 return pos;
             }
 
                 return pos;
             }
 


@@ -619,9 +622,9 @@ off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
     return wxInvalidOffset;
 }
 
     return wxInvalidOffset;
 }
 

-off_t wxStreamBuffer::Tell() const
+wxFileOffset wxStreamBuffer::Tell() const

 {
 {

-    off_t pos;
+    wxFileOffset pos;

 
     // ask the stream for position if we have a real one
     if ( m_stream )
 
     // ask the stream for position if we have a real one
     if ( m_stream )


@@ -657,12 +660,24 @@ wxStreamBase::~wxStreamBase()
 {
 }
 
 {
 }
 

-off_t wxStreamBase::OnSysSeek(off_t WXUNUSED(seek), wxSeekMode WXUNUSED(mode))
+size_t wxStreamBase::GetSize() const
+{
+    wxFileOffset length = GetLength();
+    if ( length == wxInvalidOffset )
+        return 0;
+
+    const size_t len = wx_truncate_cast(size_t, length);
+    wxASSERT_MSG( len == length + size_t(0), _T("large files not supported") );
+
+    return len;
+}
+
+wxFileOffset wxStreamBase::OnSysSeek(wxFileOffset WXUNUSED(seek), wxSeekMode WXUNUSED(mode))

 {
     return wxInvalidOffset;
 }
 
 {
     return wxInvalidOffset;
 }
 

-off_t wxStreamBase::OnSysTell() const
+wxFileOffset wxStreamBase::OnSysTell() const

 {
     return wxInvalidOffset;
 }
 {
     return wxInvalidOffset;
 }


@@ -767,7 +782,7 @@ size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
     if (!ptrback)
         return 0;
 
     if (!ptrback)
         return 0;
 

-    // Eof() shouldn't return TRUE any longer
+    // Eof() shouldn't return true any longer

     if ( m_lasterror == wxSTREAM_EOF )
         m_lasterror = wxSTREAM_NO_ERROR;
 
     if ( m_lasterror == wxSTREAM_EOF )
         m_lasterror = wxSTREAM_NO_ERROR;
 


@@ -853,7 +868,7 @@ wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
     return *this;
 }
 
     return *this;
 }
 

-off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
+wxFileOffset wxInputStream::SeekI(wxFileOffset pos, wxSeekMode mode)

 {
     // RR: This code is duplicated in wxBufferedInputStream. This is
     // not really a good design, but buffered stream are different
 {
     // RR: This code is duplicated in wxBufferedInputStream. This is
     // not really a good design, but buffered stream are different


@@ -887,9 +902,9 @@ off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
     return OnSysSeek(pos, mode);
 }
 
     return OnSysSeek(pos, mode);
 }
 

-off_t wxInputStream::TellI() const
+wxFileOffset wxInputStream::TellI() const

 {
 {

-    off_t pos = OnSysTell();
+    wxFileOffset pos = OnSysTell();

 
     if (pos != wxInvalidOffset)
         pos -= (m_wbacksize - m_wbackcur);
 
     if (pos != wxInvalidOffset)
         pos -= (m_wbacksize - m_wbackcur);


@@ -933,12 +948,12 @@ wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
     return *this;
 }
 
     return *this;
 }
 

-off_t wxOutputStream::TellO() const
+wxFileOffset wxOutputStream::TellO() const

 {
     return OnSysTell();
 }
 
 {
     return OnSysTell();
 }
 

-off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+wxFileOffset wxOutputStream::SeekO(wxFileOffset pos, wxSeekMode mode)

 {
     return OnSysSeek(pos, mode);
 }
 {
     return OnSysSeek(pos, mode);
 }


@@ -957,7 +972,7 @@ wxCountingOutputStream::wxCountingOutputStream ()
      m_currentPos = 0;
 }
 
      m_currentPos = 0;
 }
 

-size_t wxCountingOutputStream::GetSize() const
+wxFileOffset wxCountingOutputStream::GetLength() const

 {
     return m_lastcount;
 }
 {
     return m_lastcount;
 }


@@ -972,20 +987,24 @@ size_t wxCountingOutputStream::OnSysWrite(const void *WXUNUSED(buffer),
     return m_currentPos;
 }
 
     return m_currentPos;
 }
 

-off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxCountingOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)

 {
 {

+    ssize_t new_pos = wx_truncate_cast(ssize_t, pos);
+

     switch ( mode )
     {
         case wxFromStart:
     switch ( mode )
     {
         case wxFromStart:

-            m_currentPos = pos;
+            wxCHECK_MSG( (wxFileOffset)new_pos == pos, wxInvalidOffset, wxT("huge position not supported") );

             break;
 
         case wxFromEnd:
             break;
 
         case wxFromEnd:

-            m_currentPos = m_lastcount + pos;
+            new_pos = m_lastcount + new_pos;
+            wxCHECK_MSG( (wxFileOffset)new_pos == (wxFileOffset)(m_lastcount + pos), wxInvalidOffset, wxT("huge position not supported") );

             break;
 
         case wxFromCurrent:
             break;
 
         case wxFromCurrent:

-            m_currentPos += pos;
+            new_pos = m_currentPos + new_pos;
+            wxCHECK_MSG( (wxFileOffset)new_pos == (wxFileOffset)(m_currentPos + pos), wxInvalidOffset, wxT("huge position not supported") );

             break;
 
         default:
             break;
 
         default:


@@ -993,13 +1012,15 @@ off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
             return wxInvalidOffset;
     }
 
             return wxInvalidOffset;
     }
 

+    m_currentPos = new_pos;
+

     if (m_currentPos > m_lastcount)
         m_lastcount = m_currentPos;
 
     return m_currentPos;
 }
 
     if (m_currentPos > m_lastcount)
         m_lastcount = m_currentPos;
 
     return m_currentPos;
 }
 

-off_t wxCountingOutputStream::OnSysTell() const
+wxFileOffset wxCountingOutputStream::OnSysTell() const

 {
     return m_currentPos;
 }
 {
     return m_currentPos;
 }


@@ -1063,7 +1084,7 @@ wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s,
 
 wxBufferedInputStream::~wxBufferedInputStream()
 {
 
 wxBufferedInputStream::~wxBufferedInputStream()
 {

-    m_parent_i_stream->SeekI(-(off_t)m_i_streambuf->GetBytesLeft(),
+    m_parent_i_stream->SeekI(-(wxFileOffset)m_i_streambuf->GetBytesLeft(),

                              wxFromCurrent);
 
     delete m_i_streambuf;
                              wxFromCurrent);
 
     delete m_i_streambuf;


@@ -1100,7 +1121,7 @@ wxInputStream& wxBufferedInputStream::Read(void *buf, size_t size)
     return *this;
 }
 
     return *this;
 }
 

-off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
+wxFileOffset wxBufferedInputStream::SeekI(wxFileOffset pos, wxSeekMode mode)

 {
     // RR: Look at wxInputStream for comments.
 
 {
     // RR: Look at wxInputStream for comments.
 


@@ -1120,9 +1141,9 @@ off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
     return m_i_streambuf->Seek(pos, mode);
 }
 
     return m_i_streambuf->Seek(pos, mode);
 }
 

-off_t wxBufferedInputStream::TellI() const
+wxFileOffset wxBufferedInputStream::TellI() const

 {
 {

-    off_t pos = m_i_streambuf->Tell();
+    wxFileOffset pos = m_i_streambuf->Tell();

 
     if (pos != wxInvalidOffset)
         pos -= (m_wbacksize - m_wbackcur);
 
     if (pos != wxInvalidOffset)
         pos -= (m_wbacksize - m_wbackcur);


@@ -1135,12 +1156,12 @@ size_t wxBufferedInputStream::OnSysRead(void *buffer, size_t bufsize)
     return m_parent_i_stream->Read(buffer, bufsize).LastRead();
 }
 
     return m_parent_i_stream->Read(buffer, bufsize).LastRead();
 }
 

-off_t wxBufferedInputStream::OnSysSeek(off_t seek, wxSeekMode mode)
+wxFileOffset wxBufferedInputStream::OnSysSeek(wxFileOffset seek, wxSeekMode mode)

 {
     return m_parent_i_stream->SeekI(seek, mode);
 }
 
 {
     return m_parent_i_stream->SeekI(seek, mode);
 }
 

-off_t wxBufferedInputStream::OnSysTell() const
+wxFileOffset wxBufferedInputStream::OnSysTell() const

 {
     return m_parent_i_stream->TellI();
 }
 {
     return m_parent_i_stream->TellI();
 }


@@ -1179,6 +1200,13 @@ wxBufferedOutputStream::~wxBufferedOutputStream()
     delete m_o_streambuf;
 }
 
     delete m_o_streambuf;
 }
 

+bool wxBufferedOutputStream::Close()
+{
+    Sync();
+    return IsOk();
+}
+
+

 wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
 {
     m_lastcount = 0;
 wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
 {
     m_lastcount = 0;


@@ -1186,13 +1214,13 @@ wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
     return *this;
 }
 
     return *this;
 }
 

-off_t wxBufferedOutputStream::SeekO(off_t pos, wxSeekMode mode)
+wxFileOffset wxBufferedOutputStream::SeekO(wxFileOffset pos, wxSeekMode mode)

 {
     Sync();
     return m_o_streambuf->Seek(pos, mode);
 }
 
 {
     Sync();
     return m_o_streambuf->Seek(pos, mode);
 }
 

-off_t wxBufferedOutputStream::TellO() const
+wxFileOffset wxBufferedOutputStream::TellO() const

 {
     return m_o_streambuf->Tell();
 }
 {
     return m_o_streambuf->Tell();
 }


@@ -1208,19 +1236,19 @@ size_t wxBufferedOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
     return m_parent_o_stream->Write(buffer, bufsize).LastWrite();
 }
 
     return m_parent_o_stream->Write(buffer, bufsize).LastWrite();
 }
 

-off_t wxBufferedOutputStream::OnSysSeek(off_t seek, wxSeekMode mode)
+wxFileOffset wxBufferedOutputStream::OnSysSeek(wxFileOffset seek, wxSeekMode mode)

 {
     return m_parent_o_stream->SeekO(seek, mode);
 }
 
 {
     return m_parent_o_stream->SeekO(seek, mode);
 }
 

-off_t wxBufferedOutputStream::OnSysTell() const
+wxFileOffset wxBufferedOutputStream::OnSysTell() const

 {
     return m_parent_o_stream->TellO();
 }
 
 {
     return m_parent_o_stream->TellO();
 }
 

-size_t wxBufferedOutputStream::GetSize() const
+wxFileOffset wxBufferedOutputStream::GetLength() const

 {
 {

-   return m_parent_o_stream->GetSize() + m_o_streambuf->GetIntPosition();
+   return m_parent_o_stream->GetLength() + m_o_streambuf->GetIntPosition();

 }
 
 void wxBufferedOutputStream::SetOutputStreamBuffer(wxStreamBuffer *buffer)
 }
 
 void wxBufferedOutputStream::SetOutputStreamBuffer(wxStreamBuffer *buffer)


@@ -1242,5 +1270,4 @@ wxOutputStream& wxEndL(wxOutputStream& stream)
     return stream.Write(eol, wxStrlen(eol));
 }
 
     return stream.Write(eol, wxStrlen(eol));
 }
 

-#endif
-  // wxUSE_STREAMS
+#endif // wxUSE_STREAMS