1 files changed, 66 insertions, 0 deletions
diff --git a/Source/cmIfCommand.cxx b/Source/cmIfCommand.cxx
new file mode 100644
index 0000000..5dab24b
--- /dev/null
+++ b/Source/cmIfCommand.cxx
@@ -0,0 +1,66 @@
+/*=========================================================================
+
+  Program:   Insight Segmentation & Registration Toolkit
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) 2000 National Library of Medicine
+  All rights reserved.
+
+  See COPYRIGHT.txt for copyright details.
+
+=========================================================================*/
+#include "cmIfCommand.h"
+#include "cmCacheManager.h"
+
+bool cmIfFunctionBlocker::
+IsFunctionBlocked(const char *name, const std::vector<std::string> &args, 
+                  const cmMakefile &mf) const
+{
+  if (strcmp(name,"ELSE") && strcmp(name,"ENDIF"))
+    {
+    return true;
+    }
+  if (strcmp(args[0].c_str(),m_Define.c_str()))
+    {
+    return true;
+    }
+  return false;
+}
+
+bool cmIfFunctionBlocker::
+ShouldRemove(const char *name, const std::vector<std::string> &args, 
+             const cmMakefile &mf) const
+{
+  return !this->IsFunctionBlocked(name,args,mf);
+}
+
+bool cmIfCommand::Invoke(std::vector<std::string>& args)
+{
+  if(args.size() < 1 )
+    {
+    this->SetError("called with incorrect number of arguments");
+    return false;
+    }
+
+  // check to see if the argument is defined first
+  const char *def = m_Makefile->GetDefinition(args[0].c_str());
+  if(def && strcmp(def,"0") && strcmp(def,"false") && strcmp(def,"") && 
+     strcmp(def,"NOTFOUND"))
+    {
+    // do nothing
+    }
+  else
+    {
+    // create a function blocker
+    cmIfFunctionBlocker *f = new cmIfFunctionBlocker();
+    f->m_Define = args[0];
+    m_Makefile->AddFunctionBlocker(f);
+    }
+  
+  return true;
+}
+