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124 рядки
3.0 KiB
124 рядки
3.0 KiB
#ifndef ABAKUS_FUNCTION_H
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#define ABAKUS_FUNCTION_H
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/*
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* function.h - part of abakus
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* Copyright (C) 2004, 2005 Michael Pyne <michael.pyne@kdemail.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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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#include "numerictypes.h"
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#include <tqobject.h>
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#include <tqstringlist.h>
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#include <tqstring.h>
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#include <tqmap.h>
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#include <tqdict.h>
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class BaseFunction;
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struct UserFunction
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{
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int sequenceNumber;
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BaseFunction *fn;
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TQString varName;
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};
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// Ugly pointer-to-member typedef ahead
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typedef Abakus::number_t (Abakus::number_t::*function_t)() const;
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struct Function {
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TQString name;
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TQString description;
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// A function is either builtin or user defined, this union is
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// used for both cases.
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union {
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function_t fn; // Builtin.
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UserFunction *userFn; // User defined
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};
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bool returnsTrig;
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bool needsTrig;
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bool userDefined;
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};
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void setTrigMode(Abakus::TrigMode mode);
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Abakus::TrigMode trigMode();
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class FunctionManager : public TQObject
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{
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Q_OBJECT
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public:
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typedef TQDict<Function> functionDict;
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static FunctionManager *instance();
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Function *function(const TQString &name);
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bool isFunction(const TQString &name);
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bool isFunctionUserDefined(const TQString &name);
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bool addFunction(BaseFunction *fn, const TQString &dependantVar);
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bool addFunction(const TQString &name, function_t fn, const TQString &desc);
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void removeFunction(const TQString &name);
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typedef enum { Builtin, UserDefined, All } FunctionType;
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TQStringList functionList(FunctionType type);
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signals:
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void signalFunctionAdded(const TQString &name);
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void signalFunctionRemoved(const TQString &name);
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private:
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FunctionManager(TQObject *parent = 0, const char *name = "function manager");
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static FunctionManager *m_manager;
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functionDict m_dict;
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};
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Abakus::number_t evaluateFunction(const Function *func, const Abakus::number_t value);
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// Implemented in lexer.l due to prototype issues.
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Abakus::number_t parseString(const char *str);
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// Implemented in lexer.l due to prototype issues.
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class Lexer
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{
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public:
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Lexer(const TQString &expr);
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~Lexer();
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bool hasNext() const;
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int nextType();
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int tokenPos() const;
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// Can call this after nextType to find the associated string value of the
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// token.
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TQString tokenValue() const;
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private:
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class Private;
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Private *m_private;
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};
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#endif
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