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/*
Popup Plus plugin for Miranda IM
Copyright © 2002 Luca Santarelli,
© 2004-2007 Victor Pavlychko
© 2010 MPK
© 2010 Merlin_de
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __formula_h__
#define __formula_h__
class Formula
{
public:
class Args
{
private:
struct Item
{
char *name;
int value;
Item *next;
Item(char *aName, int aValue, Item *aNext): value(aValue), next(aNext) { name = aName ? mir_strdup(aName) : 0; }
~Item() { if (name) mir_free(name); }
};
Item *items;
public:
Args():items(0){}
~Args(){clear();}
void add(char *name, int value)
{
for (Item *p = items; p; p = p->next)
if (!lstrcmpA(p->name,name))
{
p->value = value;
return;
}
items = new Item(name, value, items);
}
int get(char *name)
{
for (Item *p = items; p; p = p->next)
if (!lstrcmpA(p->name,name))
return p->value;
return 0;
}
void clear()
{
while (items)
{
Item *p = items->next;
delete items;
items = p;
}
}
};
private:
char *m_str;
int eval_neq (char *&s, Args *args, bool *vars) const;
int eval_sum (char *&s, Args *args, bool *vars) const;
int eval_mul (char *&s, Args *args, bool *vars) const;
int eval_atom(char *&s, Args *args, bool *vars) const;
public:
Formula():m_str(mir_strdup("")) {}
Formula(char *s):m_str(mir_strdup(s)) {}
~Formula() {mir_free(m_str);}
void set(char *s){mir_free(m_str);m_str=mir_strdup(s);}
int eval(Args *args, bool *vars = 0) const;
};
#endif // __formula_h__
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