59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
|
#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);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|