ENH: Split dependency scanning and checking into separate cmDepends superclass with language-specific subclasses such as cmDependsC.

1 files changed, 82 insertions, 0 deletions

diff --git a/Source/cmDepends.h b/Source/cmDepends.h
new file mode 100644
index 0000000..00d2daf
--- /dev/null
+++ b/Source/cmDepends.h
@@ -0,0 +1,82 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef cmDepends_h
+#define cmDepends_h
+
+#include "cmStandardIncludes.h"
+
+/** \class cmDepends
+ * \brief Dependency scanner superclass.
+ *
+ * This class is responsible for maintaining a .depends.make file in
+ * the build tree corresponding to an object file.  Subclasses help it
+ * maintain dependencies for particular languages.
+ */
+class cmDepends
+{
+public:
+  /** Instances need to know the build directory name and the relative
+      path from the build directory to the target file.  */
+  cmDepends(const char* dir, const char* targetFile);
+
+  /** Virtual destructor to cleanup subclasses properly.  */
+  virtual ~cmDepends();
+
+  /** Write dependencies for the target file.  */
+  void Write();
+
+  /** Check dependencies for the target file.  */
+  void Check();
+
+  /** Clear dependencies for the target file so they will be regenerated.  */
+  void Clear();
+
+  /** Get the name of the dependency make file.  */
+  const char* GetMakeFileName();
+
+  /** Get the name of the dependency mark file.  */
+  const char* GetMarkFileName();
+
+protected:
+
+  // Write dependencies for the target file to the given stream.
+  // Return true for success and false for failure.
+  virtual bool WriteDependencies(std::ostream& os)=0;
+
+  // Check dependencies for the target file in the given stream.
+  // Return false if dependencies must be regenerated and true
+  // otherwise.
+  virtual bool CheckDependencies(std::istream& is)=0;
+
+  // The directory in which the build rule for the target file is executed.
+  std::string m_Directory;
+
+  // The name of the target file for which dependencies are maintained.
+  std::string m_TargetFile;
+
+  // The name of the .depends.make file corresponding to the target.
+  std::string m_DependsMakeFile;
+
+  // The name of the .depends file marking when dependencies were generated.
+  std::string m_DependsMarkFile;
+
+private:
+  cmDepends(cmDepends const&); // Purposely not implemented.
+  void operator=(cmDepends const&); // Purposely not implemented.
+};
+
+#endif