+wxString::size_type wxFilterClassFactoryBase::FindExtension(
+ const wxString& location) const
+{
+ for (const wxChar *const *p = GetProtocols(wxSTREAM_FILEEXT); *p; p++)
+ {
+ if ( location.EndsWith(*p) )
+ return location.length() - wxStrlen(*p);
+ }
+
+ return wxString::npos;
+}
+
+bool wxFilterClassFactoryBase::CanHandle(const wxString& protocol,
+ wxStreamProtocolType type) const
+{
+ if (type == wxSTREAM_FILEEXT)
+ return FindExtension(protocol) != wxString::npos;
+ else
+ for (const wxChar *const *p = GetProtocols(type); *p; p++)
+ if (protocol == *p)
+ return true;
+
+ return false;
+}
+
+// ----------------------------------------------------------------------------
+// wxFilterClassFactory
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxFilterClassFactory, wxFilterClassFactoryBase)
+
+wxFilterClassFactory *wxFilterClassFactory::sm_first = NULL;
+
+void wxFilterClassFactory::Remove()
+{
+ if (m_next != this)
+ {
+ wxFilterClassFactory **pp = &sm_first;
+
+ while (*pp != this)
+ pp = &(*pp)->m_next;
+
+ *pp = m_next;
+
+ m_next = this;
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxBufferedInputStream
+// ----------------------------------------------------------------------------
+
+wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s,
+ wxStreamBuffer *buffer)
+ : wxFilterInputStream(s)
+{
+ if ( buffer )
+ {
+ // use the buffer provided by the user
+ m_i_streambuf = buffer;
+ }
+ else // create a default buffer
+ {
+ m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
+
+ m_i_streambuf->SetBufferIO(1024);
+ }
+}
+
+wxBufferedInputStream::~wxBufferedInputStream()
+{
+ m_parent_i_stream->SeekI(-(wxFileOffset)m_i_streambuf->GetBytesLeft(),
+ wxFromCurrent);
+
+ delete m_i_streambuf;
+}
+
+char wxBufferedInputStream::Peek()
+{
+ return m_i_streambuf->Peek();
+}
+
+wxInputStream& wxBufferedInputStream::Read(void *buf, size_t size)
+{
+ // reset the error flag
+ Reset();
+
+ // first read from the already cached data
+ m_lastcount = GetWBack(buf, size);
+
+ // do we have to read anything more?
+ if ( m_lastcount < size )
+ {
+ size -= m_lastcount;
+ buf = (char *)buf + m_lastcount;
+
+ // the call to wxStreamBuffer::Read() below may reset our m_lastcount
+ // (but it also may not do it if the buffer is associated to another
+ // existing stream and wasn't created by us), so save it
+ size_t countOld = m_lastcount;
+
+ // the new count of the bytes read is the count of bytes read this time
+ m_lastcount = m_i_streambuf->Read(buf, size);
+
+ // plus those we had read before
+ m_lastcount += countOld;
+ }
+
+ return *this;
+}
+
+wxFileOffset wxBufferedInputStream::SeekI(wxFileOffset pos, wxSeekMode mode)
+{
+ // RR: Look at wxInputStream for comments.
+
+ if (m_lasterror==wxSTREAM_EOF)
+ Reset();
+
+ if (m_wback)
+ {
+ wxLogDebug( wxT("Seeking in stream which has data written back to it.") );
+
+ free(m_wback);
+ m_wback = NULL;
+ m_wbacksize = 0;
+ m_wbackcur = 0;
+ }
+
+ return m_i_streambuf->Seek(pos, mode);
+}
+
+wxFileOffset wxBufferedInputStream::TellI() const
projects / wxWidgets.git / blobdiff