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80 lines
2.3 KiB
C++
80 lines
2.3 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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*
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*/
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/*
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* This code is based on original Tony Tough source code
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*
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* Copyright (c) 1997-2003 Nayma Software
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*/
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#ifndef MPAL_EXPR_H
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#define MPAL_EXPR_H
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#include "tony/mpal/memory.h"
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namespace Tony {
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namespace MPAL {
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/****************************************************************************\
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* Function Prototypes
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\****************************************************************************/
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/**
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* Parses a mathematical expression from the MPC file
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*
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* @param buf Buffer containing the expression to evaluate
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* @param h Pointer to a handle that, at the end of execution,
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* will point to the area of memory containing the parsed expression
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* @returns Pointer to the buffer immediately after the expression, or NULL if error.
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*/
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const byte *parseExpression(const byte *lpBuf, HGLOBAL *h);
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/**
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* Calculate the value of a mathamatical expression
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*
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* @param h Handle to the expression
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* @returns Numeric value
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*/
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int evaluateExpression(HGLOBAL h);
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/**
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* Compare two mathematical expressions together
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*
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* @param h1 Expression to be compared
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* @param h2 Expression to be compared
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*/
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bool compareExpressions(HGLOBAL h1, HGLOBAL h2);
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/**
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* Frees an expression that was previously parsed
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*
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* @param h Handle for the expression
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*/
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void freeExpression(HGLOBAL h);
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} // end of namespace MPAL
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} // end of namespace Tony
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#endif
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