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93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2003 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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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#ifndef COMMON_UTIL_H
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#define COMMON_UTIL_H
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#include "common/scummsys.h"
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#include "common/system.h"
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template<typename T> inline T ABS (T x) { return (x>=0) ? x : -x; }
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template<typename T> inline T MIN (T a, T b) { return (a<b) ? a : b; }
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template<typename T> inline T MAX (T a, T b) { return (a>b) ? a : b; }
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/**
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* Template method which swaps the vaulues of its two parameters.
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*/
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template<typename T> inline void SWAP(T &a, T &b) { T tmp = a; a = b; b = tmp; }
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#define ARRAYSIZE(x) ((int)(sizeof(x) / sizeof(x[0])))
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int RGBMatch(byte *palette, int r, int g, int b);
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int Blend(int src, int dst, byte *palette);
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void ClearBlendCache();
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/**
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* Print a hexdump of the data passed in. The number of bytes per line
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* is customizable.
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* @param data the data to be dumped
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* @param len the lenght of that data
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* @param bytes_per_line number of bytes to print per line (default: 16)
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*/
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void hexdump(const byte * data, int len, int bytes_per_line = 16);
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/**
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* A simple random number generator. Although it is definitely not suitable
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* for cryptographic purposes, it serves our purposes just fine.
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*/
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class RandomSource {
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private:
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uint32 _randSeed;
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public:
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RandomSource(uint32 seed = 0xA943DE33);
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void setSeed(uint32 seed);
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/**
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* Generates a random unsigned integer in the interval [0, max].
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* @param max the upper bound
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* @return a random number in the interval [0, max].
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*/
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uint getRandomNumber(uint max);
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/**
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* Generates a random unsigned integer in the interval [min, max].
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* @param min the lower bound
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* @param max the upper bound
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* @return a random number in the interval [min, max].
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*/
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uint getRandomNumberRng(uint min, uint max);
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};
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/**
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* Auxillary class to (un)lock a mutex on the stack.
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*/
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class StackLock {
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OSystem::MutexRef _mutex;
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OSystem *_syst;
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void lock();
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void unlock();
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public:
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StackLock(OSystem::MutexRef mutex, OSystem *syst = 0);
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~StackLock();
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};
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#endif
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