1 files changed, 107 insertions, 0 deletions
diff --git a/gui/eval.h b/gui/eval.h
new file mode 100644
index 0000000000..18d2c48394
--- /dev/null
+++ b/gui/eval.h
@@ -0,0 +1,107 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef GUI_EVAL_H
+#define GUI_EVAL_H
+
+#include "common/stdafx.h"
+#include "common/str.h"
+#include "common/map.h"
+
+namespace GUI {
+
+using Common::String;
+using Common::Map;
+
+#define EVAL_UNDEF_VAR -13375
+
+enum tokenTypes {
+	tDelimiter,
+	tVariable,
+	tNumber,
+	tString
+};
+
+enum evalErrors {
+	eSyntaxError,
+	eExtraBracket,
+	eUnclosedBracket,
+	eBadExpr,
+	eUndefVar
+};
+
+struct IgnoreCaseComparator {
+  int operator()(const String& x, const String& y) const { return scumm_stricmp(x.c_str(), y.c_str()); }
+};
+
+class Eval {
+public:
+	Eval();
+	~Eval();
+
+	int eval(const String &input, const String &section, const String &name, int startpos);
+	void setAlias(const String &section, const String name, const String value);
+	void setVariable(const String &section, const String name, const String value);
+
+	void setParent(const String name);
+
+	void setVariable(const String name, int val) { _vars[name] = val; }
+	void setAlias(const String name, const String val) { _aliases[name] = val; }
+
+	int lookupVar(String s) { return lookupVar(s.c_str()); };
+
+	void reset();
+
+	typedef Map<String, int, IgnoreCaseComparator> VariablesMap;
+	typedef Map<String, String, IgnoreCaseComparator> AliasesMap;
+
+private:
+	void getToken();
+	void level2(int *);
+	void level3(int *);
+	void level4(int *);
+	void level5(int *);
+	void primitive(int *);
+	void arith(char op, int *r, int *h);
+	void unary(char op, int *r);
+	void exprError(int error);
+	int lookupVar(const char *s, bool includeAliases = true);
+	int getBuiltinVar(const char *s);
+
+	char _input[256];
+	String _section;
+	String _name;
+
+	int _startpos;
+
+	int _tokenType;
+	int _pos;
+
+	char _token[256];
+
+	AliasesMap _aliases;
+	VariablesMap _vars;
+};
+
+} // end of namespace GUI
+
+#endif