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#include "prince/script.h"
#include "common/debug-channels.h"
#include "common/stream.h"
namespace Prince {
Script::Script(PrinceEngine *vm) :
_code(NULL), _stacktop(0), _vm(vm), _random("GroovieScripts") {
}
Script::~Script() {
}
bool Script::loadFromStream(Common::SeekableReadStream &stream) {
_codeSize = stream.size();
_code = new byte[_codeSize];
if (!_code)
return false;
stream.read(_code, _codeSize);
// Initialize the script
_currentInstruction = 0;
return true;
}
void Script::step() {
}
uint8 Script::getCodeByte(uint16 address) {
if (address >= _codeSize)
error("Trying to read a script byte at address 0x%04X, while the "
"script is just 0x%04X bytes long", address, _codeSize);
return _code[address];
}
uint8 Script::readScript8bits() {
uint8 data = getCodeByte(_currentInstruction);
_currentInstruction++;
return data;
}
uint16 Script::readScript16bits() {
uint8 lower = readScript8bits();
uint8 upper = readScript8bits();
return lower | (upper << 8);
}
uint32 Script::readScript32bits() {
uint16 lower = readScript16bits();
uint16 upper = readScript16bits();
return lower | (upper << 16);
}
}
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