X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/530ecef01f7e33c2ec1b8b1ad8025484709bef1d..ce7208d49d5ce2ca1dc0b3b83f14f1d04f29c4bf:/src/common/stream.cpp

diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index f13da0d3d8..8ae48e1605 100644
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -371,6 +371,11 @@ char wxStreamBuffer::GetChar()
 
 size_t wxStreamBuffer::Read(void *buffer, size_t size)
 {
+    wxASSERT_MSG( buffer, _T("Warning: Null pointer is about to be used") );
+
+    /* Clear buffer first */
+    memset(buffer, 0x00, size);
+
     // lasterror is reset before all new IO calls
     if ( m_stream )
         m_stream->Reset();
@@ -447,6 +452,8 @@ size_t wxStreamBuffer::Read(wxStreamBuffer *dbuf)
 
 size_t wxStreamBuffer::Write(const void *buffer, size_t size)
 {
+    wxASSERT_MSG( buffer, _T("Warning: Null pointer is about to be send") );
+
     if (m_stream)
     {
         // lasterror is reset before all new IO calls
@@ -663,7 +670,7 @@ wxStreamBase::~wxStreamBase()
 size_t wxStreamBase::GetSize() const
 {
     wxFileOffset length = GetLength();
-    if ( length == wxInvalidOffset )
+    if ( length == (wxFileOffset)wxInvalidOffset )
         return 0;
 
     const size_t len = wx_truncate_cast(size_t, length);
@@ -741,6 +748,11 @@ char *wxInputStream::AllocSpaceWBack(size_t needed_size)
 
 size_t wxInputStream::GetWBack(void *buf, size_t size)
 {
+    wxASSERT_MSG( buf, _T("Warning: Null pointer is about to be used") );
+
+    /* Clear buffer first */
+    memset(buf, 0x00, size);
+
     if (!m_wback)
         return 0;
 
@@ -772,6 +784,8 @@ size_t wxInputStream::GetWBack(void *buf, size_t size)
 
 size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
 {
+    wxASSERT_MSG( buf, _T("Warning: Null pointer is about to be used in Ungetch()") );
+
     if ( m_lasterror != wxSTREAM_NO_ERROR && m_lasterror != wxSTREAM_EOF )
     {
         // can't operate on this stream until the error is cleared
@@ -795,15 +809,17 @@ bool wxInputStream::Ungetch(char c)
     return Ungetch(&c, sizeof(c)) != 0;
 }
 
-char wxInputStream::GetC()
+int wxInputStream::GetC()
 {
-    char c;
+    unsigned char c;
     Read(&c, sizeof(c));
-    return c;
+    return LastRead() ? c : wxEOF;
 }
 
 wxInputStream& wxInputStream::Read(void *buf, size_t size)
 {
+    wxASSERT_MSG( buf, _T("Warning: Null pointer is about to be read") );
+
     char *p = (char *)buf;
     m_lastcount = 0;
 
@@ -1030,17 +1046,27 @@ wxFileOffset wxCountingOutputStream::OnSysTell() const
 // ----------------------------------------------------------------------------
 
 wxFilterInputStream::wxFilterInputStream()
+ :  m_parent_i_stream(NULL),
+    m_owns(false)
 {
-    m_parent_i_stream = NULL;
 }
 
 wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+ :  m_parent_i_stream(&stream),
+    m_owns(false)
+{
+}
+
+wxFilterInputStream::wxFilterInputStream(wxInputStream *stream)
+ :  m_parent_i_stream(stream),
+    m_owns(true)
 {
-    m_parent_i_stream = &stream;
 }
 
 wxFilterInputStream::~wxFilterInputStream()
 {
+    if (m_owns)
+        delete m_parent_i_stream;
 }
 
 // ----------------------------------------------------------------------------
@@ -1048,17 +1074,98 @@ wxFilterInputStream::~wxFilterInputStream()
 // ----------------------------------------------------------------------------
 
 wxFilterOutputStream::wxFilterOutputStream()
+ :  m_parent_o_stream(NULL),
+    m_owns(false)
 {
-    m_parent_o_stream = NULL;
 }
 
 wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+ :  m_parent_o_stream(&stream),
+    m_owns(false)
+{
+}
+
+wxFilterOutputStream::wxFilterOutputStream(wxOutputStream *stream)
+ :  m_parent_o_stream(stream),
+    m_owns(true)
 {
-    m_parent_o_stream = &stream;
+}
+
+bool wxFilterOutputStream::Close()
+{
+    if (m_parent_o_stream && m_owns)
+        return m_parent_o_stream->Close();
+    else
+        return true;
 }
 
 wxFilterOutputStream::~wxFilterOutputStream()
 {
+    if (m_owns)
+        delete m_parent_o_stream;
+}
+
+// ----------------------------------------------------------------------------
+// wxFilterClassFactoryBase
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxFilterClassFactoryBase, wxObject)
+
+wxString wxFilterClassFactoryBase::PopExtension(const wxString& location) const
+{
+    return location.substr(0, FindExtension(location));
+}
+
+wxString::size_type wxFilterClassFactoryBase::FindExtension(
+        const wxChar *location) const
+{
+    size_t len = wxStrlen(location);
+
+    for (const wxChar *const *p = GetProtocols(wxSTREAM_FILEEXT); *p; p++)
+    {
+        size_t l = wxStrlen(*p);
+
+        if (l <= len && wxStrcmp(*p, location + len - l) == 0)
+            return len - l;
+    }
+
+    return wxString::npos;
+}
+
+bool wxFilterClassFactoryBase::CanHandle(const wxChar *protocol,
+                                         wxStreamProtocolType type) const
+{
+    if (type == wxSTREAM_FILEEXT)
+        return FindExtension(protocol) != wxString::npos;
+    else
+        for (const wxChar *const *p = GetProtocols(type); *p; p++)
+            if (wxStrcmp(*p, protocol) == 0)
+                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;
+    }
 }
 
 // ----------------------------------------------------------------------------