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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// Scripting module thread management component
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/actor.h"
#include "saga/console.h"
#include "saga/interface.h"
#include "saga/script.h"
#include "saga/scene.h"
namespace Saga {
ScriptThread *Script::createThread(uint16 scriptModuleNumber, uint16 scriptEntryPointNumber) {
ScriptThread *newThread;
loadModule(scriptModuleNumber);
if (_modules[scriptModuleNumber].entryPointsCount <= scriptEntryPointNumber) {
error("Script::createThread wrong scriptEntryPointNumber");
}
newThread = _threadList.pushFront().operator->();
newThread->_flags = kTFlagNone;
newThread->_stackSize = DEFAULT_THREAD_STACK_SIZE;
newThread->_stackBuf = (uint16 *)malloc(newThread->_stackSize * sizeof(*newThread->_stackBuf));
newThread->_stackTopIndex = newThread->_stackSize - 2;
newThread->_instructionOffset = _modules[scriptModuleNumber].entryPoints[scriptEntryPointNumber].offset;
newThread->_commonBase = _commonBuffer;
newThread->_staticBase = _commonBuffer + _modules[scriptModuleNumber].staticOffset;
newThread->_moduleBase = _modules[scriptModuleNumber].moduleBase;
newThread->_moduleBaseSize = _modules[scriptModuleNumber].moduleBaseSize;
newThread->_strings = &_modules[scriptModuleNumber].strings;
if (_vm->getGameId() == GID_IHNM)
newThread->_voiceLUT = &_globalVoiceLUT;
else
newThread->_voiceLUT = &_modules[scriptModuleNumber].voiceLUT;
return newThread;
}
void Script::wakeUpActorThread(int waitType, void *threadObj) {
ScriptThread *thread;
ScriptThreadList::iterator threadIterator;
for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
thread = threadIterator.operator->();
if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType) && (thread->_threadObj == threadObj)) {
thread->_flags &= ~kTFlagWaiting;
}
}
}
void Script::wakeUpThreads(int waitType) {
ScriptThread *thread;
ScriptThreadList::iterator threadIterator;
for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
thread = threadIterator.operator->();
if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType)) {
thread->_flags &= ~kTFlagWaiting;
}
}
}
void Script::wakeUpThreadsDelayed(int waitType, int sleepTime) {
ScriptThread *thread;
ScriptThreadList::iterator threadIterator;
for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
thread = threadIterator.operator->();
if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType)) {
thread->_waitType = kWaitTypeDelay;
thread->_sleepTime = sleepTime;
}
}
}
void Script::executeThreads(uint msec) {
ScriptThread *thread;
ScriptThreadList::iterator threadIterator;
if (_vm->_interface->_statusTextInput) {
return;
}
threadIterator = _threadList.begin();
while (threadIterator != _threadList.end()) {
thread = threadIterator.operator->();
if (thread->_flags & (kTFlagFinished | kTFlagAborted)) {
if (thread->_flags & kTFlagFinished)
setPointerVerb();
if (_vm->getGameId() == GID_IHNM) {
thread->_flags &= ~kTFlagFinished;
thread->_flags |= kTFlagAborted;
++threadIterator;
} else {
threadIterator = _threadList.erase(threadIterator);
}
continue;
}
if (thread->_flags & kTFlagWaiting) {
switch (thread->_waitType) {
case kWaitTypeDelay:
if (thread->_sleepTime < msec) {
thread->_sleepTime = 0;
} else {
thread->_sleepTime -= msec;
}
if (thread->_sleepTime == 0)
thread->_flags &= ~kTFlagWaiting;
break;
case kWaitTypeWalk:
{
ActorData *actor;
actor = (ActorData *)thread->_threadObj;
if (actor->_currentAction == kActionWait) {
thread->_flags &= ~kTFlagWaiting;
}
}
break;
case kWaitTypeWaitFrames: // IHNM
if (thread->_frameWait < _vm->_frameCount)
thread->_flags &= ~kTFlagWaiting;
break;
}
}
if (!(thread->_flags & kTFlagWaiting)) {
if (runThread(thread)) {
break;
}
}
++threadIterator;
}
}
void Script::abortAllThreads(void) {
ScriptThread *thread;
ScriptThreadList::iterator threadIterator;
threadIterator = _threadList.begin();
while (threadIterator != _threadList.end()) {
thread = threadIterator.operator->();
thread->_flags |= kTFlagAborted;
++threadIterator;
}
executeThreads(0);
}
void Script::completeThread(void) {
int limit = (_vm->getGameId() == GID_IHNM) ? 100 : 40;
for (int i = 0; i < limit && !_threadList.empty(); i++)
executeThreads(0);
}
bool Script::runThread(ScriptThread *thread) {
uint16 savedInstructionOffset;
bool stopParsing = false;
bool breakOut = false;
int operandChar;
MemoryReadStream scriptS(thread->_moduleBase, thread->_moduleBaseSize);
scriptS.seek(thread->_instructionOffset);
for (uint instructionCount = 0; instructionCount < STHREAD_TIMESLICE; instructionCount++) {
if (thread->_flags & (kTFlagAsleep))
break;
savedInstructionOffset = thread->_instructionOffset;
operandChar = scriptS.readByte();
debug(8, "Executing thread offset: %u (%x) stack: %d", thread->_instructionOffset, operandChar, thread->pushedSize());
stopParsing = false;
debug(4, "Calling op %s", this->_scriptOpsList[operandChar].scriptOpName);
(this->*_scriptOpsList[operandChar].scriptOp)(thread, &scriptS, stopParsing, breakOut);
if (stopParsing)
return breakOut;
if (thread->_flags & (kTFlagFinished | kTFlagAborted)) {
error("Wrong flags %d in thread", thread->_flags);
}
// Set instruction offset only if a previous instruction didn't branch
if (savedInstructionOffset == thread->_instructionOffset) {
thread->_instructionOffset = scriptS.pos();
} else {
if (thread->_instructionOffset >= scriptS.size()) {
error("Script::runThread() Out of range script execution");
}
scriptS.seek(thread->_instructionOffset);
}
if (breakOut)
break;
}
return false;
}
} // End of namespace Saga
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