1 files changed, 104 insertions, 0 deletions
diff --git a/Source/cmVariableWatch.cxx b/Source/cmVariableWatch.cxx
new file mode 100644
index 0000000..56e2770
--- /dev/null
+++ b/Source/cmVariableWatch.cxx
@@ -0,0 +1,104 @@
+/*============================================================================
+  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"
+
+#include "cmAlgorithms.h"
+
+#include <cm_auto_ptr.hxx>
+
+static const char* const cmVariableWatchAccessStrings[] = {
+  "READ_ACCESS",     "UNKNOWN_READ_ACCESS", "UNKNOWN_DEFINED_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()
+{
+}
+
+template <typename C>
+void deleteAllSecond(typename C::value_type it)
+{
+  cmDeleteAll(it.second);
+}
+
+cmVariableWatch::~cmVariableWatch()
+{
+  std::for_each(this->WatchMap.begin(), this->WatchMap.end(),
+                deleteAllSecond<cmVariableWatch::StringToVectorOfPairs>);
+}
+
+bool cmVariableWatch::AddWatch(const std::string& variable, WatchMethod method,
+                               void* client_data /*=0*/,
+                               DeleteData delete_data /*=0*/)
+{
+  CM_AUTO_PTR<cmVariableWatch::Pair> p(new cmVariableWatch::Pair);
+  p->Method = method;
+  p->ClientData = client_data;
+  p->DeleteDataCall = delete_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 && client_data &&
+        client_data == pair->ClientData) {
+      // Callback already exists
+      return false;
+    }
+  }
+  vp->push_back(p.release());
+  return true;
+}
+
+void cmVariableWatch::RemoveWatch(const std::string& variable,
+                                  WatchMethod method, void* client_data /*=0*/)
+{
+  if (!this->WatchMap.count(variable)) {
+    return;
+  }
+  cmVariableWatch::VectorOfPairs* vp = &this->WatchMap[variable];
+  cmVariableWatch::VectorOfPairs::iterator it;
+  for (it = vp->begin(); it != vp->end(); ++it) {
+    if ((*it)->Method == method &&
+        // If client_data is NULL, we want to disconnect all watches against
+        // the given method; otherwise match ClientData as well.
+        (!client_data || (client_data == (*it)->ClientData))) {
+      delete *it;
+      vp->erase(it);
+      return;
+    }
+  }
+}
+
+bool 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);
+    }
+    return true;
+  }
+  return false;
+}