disable select root menu command when the root is hidden

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

diff --git a/src/common/mstream.cpp b/src/common/mstream.cpp
index ab50d843865f1c8ee942ca2b6105678dc09d7bc3..cd8ec4ecb85c1ce66fda157619e6e0f4e999c11f 100644 (file)
--- a/src/common/mstream.cpp
+++ b/src/common/mstream.cpp
@@ -21,15 +21,19 @@
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-  #pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #if wxUSE_STREAMS
 
 #endif
 
 #if wxUSE_STREAMS
 

-#include <stdlib.h>
-#include "wx/stream.h"

 #include "wx/mstream.h"
 
 #include "wx/mstream.h"
 

+#ifndef   WX_PRECOMP
+    #include  "wx/stream.h"
+#endif  //WX_PRECOMP
+
+#include <stdlib.h>
+

 // ============================================================================
 // implementation
 // ============================================================================
 // ============================================================================
 // implementation
 // ============================================================================


@@ -69,6 +73,35 @@ wxMemoryInputStream::wxMemoryInputStream(const wxMemoryOutputStream& stream)
     m_length = len;
 }
 
     m_length = len;
 }
 

+void
+wxMemoryInputStream::InitFromStream(wxInputStream& stream, wxFileOffset lenFile)
+{
+    if ( lenFile == wxInvalidOffset )
+        lenFile = stream.GetLength();
+
+    if ( lenFile == wxInvalidOffset )
+    {
+        m_i_streambuf = NULL;
+        m_lasterror = wxSTREAM_EOF;
+        return;
+    }
+
+    const size_t len = wx_truncate_cast(size_t, lenFile);
+    wxASSERT_MSG( (wxFileOffset)len == lenFile, _T("huge files not supported") );
+
+    m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
+    m_i_streambuf->SetBufferIO(len); // create buffer
+    stream.Read(m_i_streambuf->GetBufferStart(), len);
+    m_i_streambuf->SetIntPosition(0); // seek to start pos
+    m_i_streambuf->Fixed(true);
+    m_length = stream.LastRead();
+}
+
+bool wxMemoryInputStream::CanRead() const
+{
+    return m_i_streambuf->GetIntPosition() != m_length;
+}
+

 wxMemoryInputStream::~wxMemoryInputStream()
 {
     delete m_i_streambuf;
 wxMemoryInputStream::~wxMemoryInputStream()
 {
     delete m_i_streambuf;