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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2003 The ScummVM project
*
* 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.
*
* $Header$
*/
#include "stdafx.h"
#include "base/engine.h"
#include "common/util.h"
namespace Common {
//
// Print hexdump of the data passed in
//
void hexdump(const byte * data, int len, int bytesPerLine) {
assert(1 <= bytesPerLine && bytesPerLine <= 32);
int i;
byte c;
int offset = 0;
while (len >= bytesPerLine) {
printf("%06x: ", offset);
for (i = 0; i < bytesPerLine; i++) {
printf("%02x ", data[i]);
if (i % 4 == 3)
printf(" ");
}
printf(" |");
for (i = 0; i < bytesPerLine; i++) {
c = data[i];
if (c < 32 || c >= 127)
c = '.';
printf("%c", c);
}
printf("|\n");
data += bytesPerLine;
len -= bytesPerLine;
offset += bytesPerLine;
}
if (len <= 0)
return;
printf("%06x: ", offset);
for (i = 0; i < len; i++) {
printf("%02x ", data[i]);
if (i % 4 == 3)
printf(" ");
}
for (; i < bytesPerLine; i++)
printf(" ");
printf(" |");
for (i = 0; i < len; i++) {
c = data[i];
if (c < 32 || c >= 127)
c = '.';
printf("%c", c);
}
for (; i < bytesPerLine; i++)
printf(" ");
printf("|\n");
}
RandomSource::RandomSource() {
// Use system time as RNG seed. Normally not a good idea, if you are using
// a RNG for security purposes, but good enough for our purposes.
setSeed(time(0));
}
void RandomSource::setSeed(uint32 seed) {
_randSeed = seed;
}
uint RandomSource::getRandomNumber(uint max) {
/* TODO: my own random number generator */
_randSeed = 0xDEADBF03 * (_randSeed + 1);
_randSeed = (_randSeed >> 13) | (_randSeed << 19);
return _randSeed % (max + 1);
}
uint RandomSource::getRandomNumberRng(uint min, uint max) {
return getRandomNumber(max - min) + min;
}
StackLock::StackLock(OSystem::MutexRef mutex, OSystem *syst)
: _mutex(mutex), _syst(syst) {
if (syst == 0)
_syst = g_system;
lock();
}
StackLock::~StackLock() {
unlock();
}
void StackLock::lock() {
assert(_syst);
_syst->lock_mutex(_mutex);
}
void StackLock::unlock() {
assert(_syst);
_syst->unlock_mutex(_mutex);
}
} // End of namespace Common
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