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126 lines
2.9 KiB
C++
126 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef GUI_EVAL_H
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#define GUI_EVAL_H
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#include "common/str.h"
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#include "common/hashmap.h"
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#include "common/hash-str.h"
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namespace GUI {
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using Common::String;
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using Common::HashMap;
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enum {
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EVAL_UNDEF_VAR = -13375,
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EVAL_STRING_VAR = -13376
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};
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class Eval {
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public:
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Eval();
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~Eval();
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int eval(const String &input, const String §ion, const String &name, int startpos);
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void setVar(const String §ion, const String &name, const String &value);
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void setParent(const String &name);
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void setVar(const String &name, int val) { _vars[name] = val; }
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void setStringVar(const String &name, const String &val) { _strings[name] = val; }
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void setAlias(const Common::String &name, const String &val) { _aliases[name] = val; }
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int getVar(const Common::String &s) { return getVar_(s); }
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int getVar(const Common::String &s, int def) {
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int val = getVar_(s);
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return (val == EVAL_UNDEF_VAR) ? def : val;
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}
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const String &getStringVar(const Common::String &name) { return _strings[name]; }
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uint getNumVars() { return _vars.size(); }
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void reset();
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char *lastToken() { return _token; }
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typedef HashMap<String, int> VariablesMap;
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typedef HashMap<String, String> AliasesMap;
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typedef HashMap<String, String> StringsMap;
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private:
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enum TokenTypes {
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tNone,
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tDelimiter,
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tVariable,
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tNumber,
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tString
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};
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enum EvalErrors {
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eSyntaxError,
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eExtraBracket,
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eUnclosedBracket,
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eBadExpr,
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eUndefVar,
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eMissingQuote
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};
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void getToken();
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void level2(int *);
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void level3(int *);
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void level4(int *);
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void level5(int *);
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void primitive(int *);
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void arith(char op, int *r, int *h);
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void unary(char op, int *r);
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void exprError(EvalErrors error);
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int getVar_(const Common::String &s, bool includeAliases = true);
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int getBuiltinVar(const char *s);
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void loadConstants();
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char _input[256];
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String _section;
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String _name;
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int _startpos;
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TokenTypes _tokenType;
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int _pos;
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char _token[256];
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AliasesMap _aliases;
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VariablesMap _vars;
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StringsMap _strings;
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};
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} // end of namespace GUI
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#endif
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