mirror of
https://github.com/libretro/scummvm.git
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121 lines
2.8 KiB
C++
121 lines
2.8 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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#include "stdafx.h"
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#include "base/engine.h"
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#include "common/util.h"
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namespace Common {
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//
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// Print hexdump of the data passed in
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//
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void hexdump(const byte * data, int len, int bytesPerLine) {
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assert(1 <= bytesPerLine && bytesPerLine <= 32);
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int i;
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byte c;
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int offset = 0;
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while (len >= bytesPerLine) {
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printf("%06x: ", offset);
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for (i = 0; i < bytesPerLine; i++) {
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printf("%02x ", data[i]);
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if (i % 4 == 3)
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printf(" ");
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}
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printf(" |");
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for (i = 0; i < bytesPerLine; i++) {
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c = data[i];
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if (c < 32 || c >= 127)
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c = '.';
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printf("%c", c);
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}
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printf("|\n");
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data += bytesPerLine;
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len -= bytesPerLine;
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offset += bytesPerLine;
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}
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if (len <= 0)
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return;
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printf("%06x: ", offset);
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for (i = 0; i < len; i++) {
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printf("%02x ", data[i]);
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if (i % 4 == 3)
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printf(" ");
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}
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for (; i < bytesPerLine; i++)
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printf(" ");
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printf(" |");
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for (i = 0; i < len; i++) {
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c = data[i];
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if (c < 32 || c >= 127)
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c = '.';
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printf("%c", c);
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}
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for (; i < bytesPerLine; i++)
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printf(" ");
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printf("|\n");
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}
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RandomSource::RandomSource() {
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// Use system time as RNG seed. Normally not a good idea, if you are using
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// a RNG for security purposes, but good enough for our purposes.
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setSeed(time(0));
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}
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void RandomSource::setSeed(uint32 seed) {
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_randSeed = seed;
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}
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uint RandomSource::getRandomNumber(uint max) {
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/* TODO: my own random number generator */
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_randSeed = 0xDEADBF03 * (_randSeed + 1);
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_randSeed = (_randSeed >> 13) | (_randSeed << 19);
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return _randSeed % (max + 1);
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}
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uint RandomSource::getRandomNumberRng(uint min, uint max) {
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return getRandomNumber(max - min) + min;
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}
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StackLock::StackLock(OSystem::MutexRef mutex, OSystem *syst)
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: _mutex(mutex), _syst(syst) {
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if (syst == 0)
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_syst = g_system;
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lock();
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}
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StackLock::~StackLock() {
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unlock();
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}
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void StackLock::lock() {
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assert(_syst);
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_syst->lock_mutex(_mutex);
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}
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void StackLock::unlock() {
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assert(_syst);
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_syst->unlock_mutex(_mutex);
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}
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} // End of namespace Common
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