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diff --git a/Source/cmVariableWatch.cxx b/Source/cmVariableWatch.cxx
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+/*============================================================================
+ CMake - Cross Platform Makefile Generator
+ Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+ Distributed under the OSI-approved BSD License (the "License");
+ see accompanying file Copyright.txt for details.
+
+ This software is distributed WITHOUT ANY WARRANTY; without even the
+ implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the License for more information.
+============================================================================*/
+#include "cmVariableWatch.h"
+
+static const char* const cmVariableWatchAccessStrings[] =
+{
+ "READ_ACCESS",
+ "UNKNOWN_READ_ACCESS",
+ "ALLOWED_UNKNOWN_READ_ACCESS",
+ "MODIFIED_ACCESS",
+ "REMOVED_ACCESS",
+ "NO_ACCESS"
+};
+
+const char* cmVariableWatch::GetAccessAsString(int access_type)
+{
+ if ( access_type < 0 || access_type >= cmVariableWatch::NO_ACCESS )
+ {
+ return "NO_ACCESS";
+ }
+ return cmVariableWatchAccessStrings[access_type];
+}
+
+cmVariableWatch::cmVariableWatch()
+{
+}
+
+cmVariableWatch::~cmVariableWatch()
+{
+}
+
+void cmVariableWatch::AddWatch(const std::string& variable,
+ WatchMethod method, void* client_data /*=0*/)
+{
+ cmVariableWatch::Pair p;
+ p.Method = method;
+ p.ClientData = client_data;
+ cmVariableWatch::VectorOfPairs* vp = &this->WatchMap[variable];
+ cmVariableWatch::VectorOfPairs::size_type cc;
+ for ( cc = 0; cc < vp->size(); cc ++ )
+ {
+ cmVariableWatch::Pair* pair = &(*vp)[cc];
+ if ( pair->Method == method )
+ {
+ (*vp)[cc] = p;
+ return;
+ }
+ }
+ vp->push_back(p);
+}
+
+void cmVariableWatch::RemoveWatch(const std::string& variable,
+ WatchMethod method)
+{
+ cmVariableWatch::VectorOfPairs* vp = &this->WatchMap[variable];
+ cmVariableWatch::VectorOfPairs::iterator it;
+ for ( it = vp->begin(); it != vp->end(); ++it )
+ {
+ if ( it->Method == method )
+ {
+ vp->erase(it);
+ return;
+ }
+ }
+}
+
+void cmVariableWatch::VariableAccessed(const std::string& variable,
+ int access_type,
+ const char* newValue,
+ const cmMakefile* mf) const
+{
+ cmVariableWatch::StringToVectorOfPairs::const_iterator mit =
+ this->WatchMap.find(variable);
+ if ( mit != this->WatchMap.end() )
+ {
+ const cmVariableWatch::VectorOfPairs* vp = &mit->second;
+ cmVariableWatch::VectorOfPairs::const_iterator it;
+ for ( it = vp->begin(); it != vp->end(); it ++ )
+ {
+ it->Method(variable, access_type, it->ClientData,
+ newValue, mf);
+ }
+ }
+}