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116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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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/stdafx.h"
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#include "common/str.h"
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#include "common/hashmap.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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#define EVAL_UNDEF_VAR -13375
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enum tokenTypes {
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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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};
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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 setAlias(const String §ion, const char *name, const String &value);
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void setVar(const String §ion, const char *name, const String &value);
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void setParent(const String &name);
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void setVar(const char *name, int val) { _vars[name] = val; }
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void setAlias(const char *name, const String &val) { _aliases[name] = val; }
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int getVar(const String &s) { return getVar_(s.c_str()); }
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int getVar(const String &s, int def) {
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int val = getVar_(s.c_str());
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return (val == EVAL_UNDEF_VAR) ? def : val;
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};
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uint getNumVars() { return _vars.size(); }
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void reset();
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struct CharStar_EqualTo {
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bool operator()(const char *x, const char *y) const { return strcmp(x, y) == 0; }
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};
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//typedef HashMap<String, int> VariablesMap;
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typedef HashMap<const char *, int, Common::Hash<const char *>, CharStar_EqualTo> VariablesMap;
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typedef HashMap<const char *, String, Common::Hash<const char *>, CharStar_EqualTo> AliasesMap;
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private:
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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(int error);
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int getVar_(const char *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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int _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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};
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} // end of namespace GUI
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#endif
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