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

1 files changed, 70 insertions, 0 deletions

diff --git a/Source/cmDependsC.h b/Source/cmDependsC.h
new file mode 100644
index 0000000..70691b7
--- /dev/null
+++ b/Source/cmDependsC.h
@@ -0,0 +1,70 @@
+/*=========================================================================
+
+  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 cmDependsC_h
+#define cmDependsC_h
+
+#include "cmDepends.h"
+#include <cmsys/RegularExpression.hxx>
+#include <queue>
+
+/** \class cmDependsC
+ * \brief Dependency scanner for C and C++ object files.
+ */
+class cmDependsC: public cmDepends
+{
+public:
+  /** Checking instances need to know the build directory name and the
+      relative path from the build directory to the target file.  */
+  cmDependsC(const char* dir, const char* targetFile);
+
+  /** Scanning need to know the build directory name, the relative
+      path from the build directory to the target file, the source
+      file from which to start scanning, and the include file search
+      path.  */
+  cmDependsC(const char* dir, const char* targetFile,
+             const char* sourceFile, std::vector<std::string> const& includes);
+
+  /** Virtual destructor to cleanup subclasses properly.  */
+  virtual ~cmDependsC();
+
+protected:
+  // Implement writing/checking methods required by superclass.
+  virtual bool WriteDependencies(std::ostream& os);
+  virtual bool CheckDependencies(std::istream& is);
+
+  // Method to scan a single file.
+  void Scan(std::istream& is);
+
+  // The source file from which to start scanning.
+  std::string m_SourceFile;
+
+  // The include file search path.
+  std::vector<std::string> const* m_IncludePath;
+
+  // Regular expression to identify C preprocessor include directives.
+  cmsys::RegularExpression m_IncludeLineRegex;
+
+  // Data structures for dependency graph walk.
+  std::set<cmStdString> m_Encountered;
+  std::queue<cmStdString> m_Unscanned;
+
+private:
+  cmDependsC(cmDependsC const&); // Purposely not implemented.
+  void operator=(cmDependsC const&); // Purposely not implemented.
+};
+
+#endif