+/////////////////////////////////////////////////////////////////////////////
+// Name: fs_mem.cpp
+// Purpose: in-memory file system
+// Author: Vaclav Slavik
+// Copyright: (c) 2000 Vaclav Slavik
+// Licence: wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include "wx/wxprec.h"
+
+#ifdef __BORDLANDC__
+#pragma hdrstop
+#endif
+
+#if (wxUSE_HTML || wxUSE_FS_INET || wxUSE_FS_ZIP) && wxUSE_STREAMS
+
+#ifndef WXPRECOMP
+#include "wx/wx.h"
+#endif
+
+#include "wx/filesys.h"
+#include "wx/fs_mem.h"
+#include "wx/mstream.h"
+
+
+class MemFSHashObj : public wxObject
+{
+ public:
+
+ MemFSHashObj(const void *data, size_t len)
+ {
+ m_Data = new char[len];
+ memcpy(m_Data, data, len);
+ m_Len = len;
+ m_Time = wxDateTime::Today();
+ }
+
+ MemFSHashObj(wxMemoryOutputStream& stream)
+ {
+ m_Len = stream.GetSize();
+ m_Data = new char[m_Len];
+ stream.CopyTo(m_Data, m_Len);
+ m_Time = wxDateTime::Today();
+ }
+
+ ~MemFSHashObj()
+ {
+ delete[] m_Data;
+ }
+
+ char *m_Data;
+ size_t m_Len;
+ wxDateTime m_Time;
+};
+
+
+//--------------------------------------------------------------------------------
+// wxMemoryFSHandler
+//--------------------------------------------------------------------------------
+
+
+wxHashTable *wxMemoryFSHandler::m_Hash = NULL;
+
+
+wxMemoryFSHandler::wxMemoryFSHandler() : wxFileSystemHandler()
+{
+ m_Hash = NULL;
+}
+
+
+
+wxMemoryFSHandler::~wxMemoryFSHandler()
+{
+ // as only one copy of FS handler is supposed to exist, we may silently
+ // delete static data here. (There is no way how to remove FS handler from
+ // wxFileSystem other than releasing _all_ handlers.)
+
+ if (m_Hash) delete m_Hash;
+ m_Hash = NULL;
+}
+
+
+
+bool wxMemoryFSHandler::CanOpen(const wxString& location)
+{
+ wxString p = GetProtocol(location);
+ return (p == wxT("memory"));
+}
+
+
+
+
+wxFSFile* wxMemoryFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
+{
+ if (m_Hash)
+ {
+ MemFSHashObj *obj = (MemFSHashObj*) m_Hash -> Get(GetRightLocation(location));
+ if (obj == NULL) return NULL;
+ else return new wxFSFile(new wxMemoryInputStream(obj -> m_Data, obj -> m_Len),
+ location,
+ GetMimeTypeFromExt(location),
+ GetAnchor(location),
+ obj -> m_Time);
+ }
+ else return NULL;
+}
+
+
+
+wxString wxMemoryFSHandler::FindFirst(const wxString& spec, int flags)
+{
+ wxLogWarning(wxT("wxMemoryFSHandler::FindFirst not implemented"));
+ return wxEmptyString;
+}
+
+
+
+wxString wxMemoryFSHandler::FindNext()
+{
+ wxLogWarning(wxT("wxMemoryFSHandler::FindNext not implemented"));
+ return wxEmptyString;
+}
+
+
+
+bool wxMemoryFSHandler::CheckHash(const wxString& filename)
+{
+ if (m_Hash == NULL)
+ {
+ m_Hash = new wxHashTable(wxKEY_STRING);
+ m_Hash -> DeleteContents(TRUE);
+ }
+
+ if (m_Hash -> Get(filename) != NULL)
+ {
+ wxString s;
+ s.Printf(_("Memory VFS already contains file '%s'!"), filename.c_str());
+ wxLogError(s);
+ return FALSE;
+ }
+ else
+ return TRUE;
+}
+
+
+
+/*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, wxImage& image, long type)
+{
+ if (!CheckHash(filename)) return;
+
+
+ wxMemoryOutputStream mems;
+ if (image.Ok() && image.SaveFile(mems, type))
+ m_Hash -> Put(filename, new MemFSHashObj(mems));
+ else
+ {
+ wxString s;
+ s.Printf(_("Failed to store image '%s' to memory VFS!"), filename.c_str());
+ printf("'%s'\n", s.c_str());
+ wxLogError(s);
+ }
+}
+
+
+/*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxBitmap& bitmap, long type)
+{
+ wxImage img(bitmap);
+ AddFile(filename, img, type);
+}
+
+
+/*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxString& textdata)
+{
+ AddFile(filename, (const void*) textdata.mb_str(), textdata.Length());
+}
+
+
+/*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const void *binarydata, size_t size)
+{
+ if (!CheckHash(filename)) return;
+ m_Hash -> Put(filename, new MemFSHashObj(binarydata, size));
+}
+
+
+
+/*static*/ void wxMemoryFSHandler::RemoveFile(const wxString& filename)
+{
+ if (m_Hash == NULL ||
+ m_Hash -> Get(filename) == NULL)
+ {
+ wxString s;
+ s.Printf(_("Trying to remove file '%s' from memory VFS, but it is not loaded!"), filename.c_str());
+ wxLogError(s);
+ }
+
+ else
+ delete m_Hash -> Delete(filename);
+}
+
+
+
+#endif // wxUSE_FS_ZIP
projects / wxWidgets.git / commitdiff
