Applied patch #421073 (making setup options work)

[wxWidgets.git] / src / msw / registry.cpp

diff --git a/src/msw/registry.cpp b/src/msw/registry.cpp
index c67b5ba3d523b57780a07f4e3c737f856587e8dc..b0c061c1d0f5c53fbbe1940c8af69a6a6a43b775 100644 (file)
--- a/src/msw/registry.cpp
+++ b/src/msw/registry.cpp
@@ -91,12 +91,12 @@ aStdKeys[] =
 // ----------------------------------------------------------------------------
 // macros
 // ----------------------------------------------------------------------------
-// @ const_cast<> is not yet supported by all compilers
+
+// const_cast<> is not yet supported by all compilers
 #define CONST_CAST    ((wxRegKey *)this)->
 
-#if   !USE_MUTABLE
-  #define m_dwLastError   CONST_CAST m_dwLastError
-#endif
+// and neither is mutable which m_dwLastError should be
+#define m_dwLastError   CONST_CAST m_dwLastError
 
 // ----------------------------------------------------------------------------
 // non member functions
@@ -186,16 +186,16 @@ wxRegKey::StdKey wxRegKey::GetStdKeyFromHkey(WXHKEY hkey)
 
 wxRegKey::wxRegKey()
 {
-  m_hKey = 0;
   m_hRootKey = (WXHKEY) aStdKeys[HKCR].hkey;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 wxRegKey::wxRegKey(const wxString& strKey) : m_strKey(strKey)
 {
   m_hRootKey  = (WXHKEY) aStdKeys[ExtractKeyName(m_strKey)].hkey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // parent is a predefined (and preopened) key
@@ -203,8 +203,8 @@ wxRegKey::wxRegKey(StdKey keyParent, const wxString& strKey) : m_strKey(strKey)
 {
   RemoveTrailingSeparator(m_strKey);
   m_hRootKey  = (WXHKEY) aStdKeys[keyParent].hkey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // parent is a normal regkey
@@ -221,8 +221,8 @@ wxRegKey::wxRegKey(const wxRegKey& keyParent, const wxString& strKey)
   RemoveTrailingSeparator(m_strKey);
 
   m_hRootKey  = keyParent.m_hRootKey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // dtor closes the key releasing system resource
@@ -260,7 +260,14 @@ void wxRegKey::SetName(const wxRegKey& keyParent, const wxString& strKey)
   Close();
 
   // combine our name with parent's to get the full name
-  m_strKey = keyParent.m_strKey;
+
+  // NB: this method is called by wxRegConfig::SetPath() which is a performance
+  //     critical function and so it preallocates space for our m_strKey to
+  //     gain some speed - this is why we only use += here and not = which
+  //     would just free the prealloc'd buffer and would have to realloc it the
+  //     next line!
+  m_strKey.clear();
+  m_strKey += keyParent.m_strKey;
   if ( !strKey.IsEmpty() && strKey[0] != REG_SEPARATOR )
     m_strKey += REG_SEPARATOR;
   m_strKey += strKey;
@@ -408,16 +415,14 @@ bool wxRegKey::Close()
 {
   if ( IsOpened() ) {
     m_dwLastError = RegCloseKey((HKEY) m_hKey);
+    m_hKey = 0;
+
     if ( m_dwLastError != ERROR_SUCCESS ) {
       wxLogSysError(m_dwLastError, _("Can't close registry key '%s'"),
                     GetName().c_str());
 
-      m_hKey = 0;
       return FALSE;
     }
-    else {
-      m_hKey = 0;
-    }
   }
 
   return TRUE;
@@ -620,8 +625,9 @@ bool wxRegKey::DeleteSelf()
   // prevent a buggy program from erasing one of the root registry keys or an
   // immediate subkey (i.e. one which doesn't have '\\' inside) of any other
   // key except HKCR (HKCR has some "deleteable" subkeys)
-  if ( m_strKey.IsEmpty() || (m_hRootKey != HKCR &&
-       m_strKey.Find(REG_SEPARATOR) == wxNOT_FOUND) ) {
+  if ( m_strKey.IsEmpty() ||
+       ((m_hRootKey != (WXHKEY) aStdKeys[HKCR].hkey) &&
+        (m_strKey.Find(REG_SEPARATOR) == wxNOT_FOUND)) ) {
       wxLogError(_("Registry key '%s' is needed for normal system operation,\ndeleting it will leave your system in unusable state:\noperation aborted."), GetFullName(this));
 
       return FALSE;