AbaKus – a complex calculator
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#ifndef ABAKUS_FUNCTION_H
#define ABAKUS_FUNCTION_H
/*
* function.h - part of abakus
* Copyright (C) 2004, 2005 Michael Pyne <michael.pyne@kdemail.net>
*
* 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
*/
#include "numerictypes.h"
#include <tqobject.h>
#include <tqstringlist.h>
#include <tqstring.h>
#include <tqmap.h>
#include <tqdict.h>
class BaseFunction;
struct UserFunction
{
int sequenceNumber;
BaseFunction *fn;
TQString varName;
};
// Ugly pointer-to-member typedef ahead
typedef Abakus::number_t (Abakus::number_t::*function_t)() const;
struct Function {
TQString name;
TQString description;
// A function is either builtin or user defined, this union is
// used for both cases.
union {
function_t fn; // Builtin.
UserFunction *userFn; // User defined
};
bool returnsTrig;
bool needsTrig;
bool userDefined;
};
void setTrigMode(Abakus::TrigMode mode);
Abakus::TrigMode trigMode();
class FunctionManager : public TQObject
{
Q_OBJECT
TQ_OBJECT
public:
typedef TQDict<Function> functionDict;
static FunctionManager *instance();
Function *function(const TQString &name);
bool isFunction(const TQString &name);
bool isFunctionUserDefined(const TQString &name);
bool addFunction(BaseFunction *fn, const TQString &dependantVar);
bool addFunction(const TQString &name, function_t fn, const TQString &desc);
void removeFunction(const TQString &name);
typedef enum { Builtin, UserDefined, All } FunctionType;
TQStringList functionList(FunctionType type);
signals:
void signalFunctionAdded(const TQString &name);
void signalFunctionRemoved(const TQString &name);
private:
FunctionManager(TQObject *parent = 0, const char *name = "function manager");
static FunctionManager *m_manager;
functionDict m_dict;
};
Abakus::number_t evaluateFunction(const Function *func, const Abakus::number_t value);
// Implemented in lexer.l due to prototype issues.
Abakus::number_t parseString(const char *str);
// Implemented in lexer.l due to prototype issues.
class Lexer
{
public:
Lexer(const TQString &expr);
~Lexer();
bool hasNext() const;
int nextType();
int tokenPos() const;
// Can call this after nextType to find the associated string value of the
// token.
TQString tokenValue() const;
private:
class Private;
Private *m_private;
};
#endif