fixed warnings about pointer to integer cast

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

diff --git a/src/common/mstream.cpp b/src/common/mstream.cpp
index f1625ecf557f9ae717139d12d620b9ba8cea2a6f..4f1886eaeeb82ba1474b0b63d8dcf5976ae0bf33 100644 (file)
--- a/src/common/mstream.cpp
+++ b/src/common/mstream.cpp
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "mstream.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -52,6 +48,27 @@ wxMemoryInputStream::wxMemoryInputStream(const void *data, size_t len)
     m_length = len;
 }
 
+wxMemoryInputStream::wxMemoryInputStream(const wxMemoryOutputStream& stream)
+{
+    const wxFileOffset 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( len == lenFile, _T("huge files not supported") );
+
+    m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
+    m_i_streambuf->SetBufferIO(len); // create buffer
+    stream.CopyTo(m_i_streambuf->GetBufferStart(), len);
+    m_i_streambuf->SetIntPosition(0); // seek to start pos
+    m_i_streambuf->Fixed(true);
+    m_length = len;
+}
+
 wxMemoryInputStream::~wxMemoryInputStream()
 {
     delete m_i_streambuf;
@@ -60,8 +77,15 @@ wxMemoryInputStream::~wxMemoryInputStream()
 char wxMemoryInputStream::Peek()
 {
     char *buf = (char *)m_i_streambuf->GetBufferStart();
+    size_t pos = m_i_streambuf->GetIntPosition();
+    if ( pos == m_length )
+    {
+        m_lasterror = wxSTREAM_READ_ERROR;
+
+        return 0;
+    }
 
-    return buf[m_i_streambuf->GetIntPosition()];
+    return buf[pos];
 }
 
 bool wxMemoryInputStream::Eof() const
@@ -85,12 +109,12 @@ size_t wxMemoryInputStream::OnSysRead(void *buffer, size_t nbytes)
     return m_i_streambuf->GetIntPosition() - pos;
 }
 
-off_t wxMemoryInputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxMemoryInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 {
     return m_i_streambuf->Seek(pos, mode);
 }
 
-off_t wxMemoryInputStream::OnSysTell() const
+wxFileOffset wxMemoryInputStream::OnSysTell() const
 {
     return m_i_streambuf->Tell();
 }
@@ -126,12 +150,12 @@ size_t wxMemoryOutputStream::OnSysWrite(const void *buffer, size_t nbytes)
     return newpos - oldpos;
 }
 
-off_t wxMemoryOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
+wxFileOffset wxMemoryOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
 {
     return m_o_streambuf->Seek(pos, mode);
 }
 
-off_t wxMemoryOutputStream::OnSysTell() const
+wxFileOffset wxMemoryOutputStream::OnSysTell() const
 {
     return m_o_streambuf->Tell();
 }