ENH: Add rudamentary mathematical expression support

1 files changed, 79 insertions, 0 deletions

diff --git a/Source/cmExprParserHelper.h b/Source/cmExprParserHelper.h
new file mode 100644
index 0000000000..5fd2c3d2f4
--- /dev/null
+++ b/Source/cmExprParserHelper.h
@@ -0,0 +1,79 @@
+/*=========================================================================
+
+  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 cmExprParserHelper_h 
+#define cmExprParserHelper_h
+
+#include "cmStandardIncludes.h"
+
+#define YYSTYPE cmExprParserHelper::ParserType
+#define YYSTYPE_IS_DECLARED
+#define YY_EXTRA_TYPE cmExprParserHelper*
+#define YY_DECL int cmExpr_yylex(YYSTYPE* yylvalp, yyscan_t yyscanner)
+
+/** \class cmExprParserHelper
+ * \brief Helper class for parsing java source files
+ *
+ * Finds dependencies for java file and list of outputs
+ */
+
+class cmMakefile;
+
+class cmExprParserHelper
+{
+public:
+  typedef struct {
+    int Number;
+  } ParserType;
+
+  cmExprParserHelper();
+  ~cmExprParserHelper();
+
+  int ParseString(const char* str, int verb);
+
+  int LexInput(char* buf, int maxlen);
+  void Error(const char* str);
+
+  void SetResult(int value);
+
+  int GetResult() { return m_Result; }
+
+  void SetLineFile(long line, const char* file);
+
+  const char* GetError() { return m_Error.c_str(); }
+
+private:
+  cmStdString::size_type InputBufferPos;
+  cmStdString InputBuffer;
+  std::vector<char> OutputBuffer;
+  int CurrentLine;
+  int UnionsAvailable;
+  int Verbose;
+
+  void Print(const char* place, const char* str);
+
+  void CleanupParser();
+
+  int m_Result;
+  const char* m_FileName;
+  long m_FileLine;
+  std::string m_Error;
+};
+
+#endif
+
+
+