* Moved the mapm library from src/apps/deskcalc to src/libs and headers/libs.

* Moved the ExpressionParser class to shared. It's now built into its own
  static library.
* Added hexadecimal number support to the expression parser as well as
  Evaluation*() methods to get a number instead of a string.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31298 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/shared/ExpressionParser.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2006-2009 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <[email protected]>
+ *		Stephan Aßmus <[email protected]>
+ */
+#ifndef EXPRESSION_PARSER_H
+#define EXPRESSION_PARSER_H
+
+
+#include <String.h>
+
+
+class Tokenizer;
+
+class ParseException {
+ public:
+	ParseException(const char* message, int32 position)
+		: message(message),
+		  position(position)
+	{
+	}
+
+	ParseException(const ParseException& other)
+		: message(other.message),
+		  position(other.position)
+	{
+	}
+
+	BString	message;
+	int32	position;
+};
+
+struct Function;
+struct Token;
+class MAPM;
+
+class ExpressionParser {
+ public:
+								ExpressionParser();
+								~ExpressionParser();
+
+			void				SetSupportHexInput(bool enabled);
+
+			BString				Evaluate(const char* expressionString);
+			int64				EvaluateToInt64(const char* expressionString);
+			double				EvaluateToDouble(const char* expressionString);
+
+ private:
+
+			MAPM				_ParseBinary();
+			MAPM				_ParseSum();
+			MAPM				_ParseProduct();
+			MAPM				_ParsePower();
+			MAPM				_ParseUnary();
+			void				_InitArguments(MAPM values[],
+									int32 argumentCount);
+			MAPM				_ParseFunction(const Token& token);
+			MAPM				_ParseAtom();
+
+			void				_EatToken(int32 type);
+
+			Tokenizer*			fTokenizer;
+};
+
+#endif // EXPRESSION_PARSER_H