mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-22 01:39:57 +00:00
698 lines
18 KiB
C++
698 lines
18 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2004-2005 The ScummVM project
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*
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* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
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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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* 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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* 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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*/
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// Scripting module thread management component
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#include "saga/saga.h"
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#include "saga/gfx.h"
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#include "saga/actor.h"
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#include "saga/console.h"
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#include "saga/interface.h"
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#include "saga/script.h"
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#include "saga/stream.h"
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#include "saga/scene.h"
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#include "saga/resnames.h"
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namespace Saga {
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ScriptThread *Script::createThread(uint16 scriptModuleNumber, uint16 scriptEntryPointNumber) {
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ScriptThread *newThread;
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loadModule(scriptModuleNumber);
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if (_modules[scriptModuleNumber].entryPointsCount <= scriptEntryPointNumber) {
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error("Script::createThread wrong scriptEntryPointNumber");
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}
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newThread = _threadList.pushFront().operator->();
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newThread->_flags = kTFlagNone;
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newThread->_stackSize = DEFAULT_THREAD_STACK_SIZE;
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newThread->_stackBuf = (uint16 *)malloc(newThread->_stackSize * sizeof(*newThread->_stackBuf));
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newThread->_stackTopIndex = newThread->_stackSize - 1; // or 2 - as in original
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newThread->_instructionOffset = _modules[scriptModuleNumber].entryPoints[scriptEntryPointNumber].offset;
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newThread->_commonBase = _commonBuffer;
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newThread->_staticBase = _commonBuffer + _modules[scriptModuleNumber].staticOffset;
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newThread->_moduleBase = _modules[scriptModuleNumber].moduleBase;
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newThread->_moduleBaseSize = _modules[scriptModuleNumber].moduleBaseSize;
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newThread->_strings = &_modules[scriptModuleNumber].strings;
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newThread->_voiceLUT = &_modules[scriptModuleNumber].voiceLUT;
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return newThread;
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}
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void Script::wakeUpActorThread(int waitType, void *threadObj) {
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ScriptThread *thread;
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ScriptThreadList::iterator threadIterator;
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for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
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thread = threadIterator.operator->();
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if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType) && (thread->_threadObj == threadObj)) {
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thread->_flags &= ~kTFlagWaiting;
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}
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}
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}
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void Script::wakeUpThreads(int waitType) {
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ScriptThread *thread;
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ScriptThreadList::iterator threadIterator;
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for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
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thread = threadIterator.operator->();
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if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType)) {
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thread->_flags &= ~kTFlagWaiting;
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}
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}
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}
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void Script::wakeUpThreadsDelayed(int waitType, int sleepTime) {
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ScriptThread *thread;
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ScriptThreadList::iterator threadIterator;
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for (threadIterator = _threadList.begin(); threadIterator != _threadList.end(); ++threadIterator) {
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thread = threadIterator.operator->();
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if ((thread->_flags & kTFlagWaiting) && (thread->_waitType == waitType)) {
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thread->_waitType = kWaitTypeDelay;
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thread->_sleepTime = sleepTime;
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}
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}
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}
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int Script::executeThreads(uint msec) {
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ScriptThread *thread;
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ScriptThreadList::iterator threadIterator;
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if (!isInitialized()) {
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return FAILURE;
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}
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threadIterator = _threadList.begin();
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while (threadIterator != _threadList.end()) {
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thread = threadIterator.operator->();
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if (thread->_flags & (kTFlagFinished | kTFlagAborted)) {
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if (thread->_flags & kTFlagFinished)
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setPointerVerb();
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threadIterator = _threadList.erase(threadIterator);
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continue;
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}
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if (thread->_flags & kTFlagWaiting) {
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if (thread->_waitType == kWaitTypeDelay) {
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if (thread->_sleepTime < msec) {
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thread->_sleepTime = 0;
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} else {
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thread->_sleepTime -= msec;
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}
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if (thread->_sleepTime == 0)
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thread->_flags &= ~kTFlagWaiting;
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} else {
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if (thread->_waitType == kWaitTypeWalk) {
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ActorData *actor;
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actor = (ActorData *)thread->_threadObj;
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if (actor->currentAction == kActionWait) {
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thread->_flags &= ~kTFlagWaiting;
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}
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}
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}
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}
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if (!(thread->_flags & kTFlagWaiting))
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runThread(thread, STHREAD_TIMESLICE);
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++threadIterator;
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}
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return SUCCESS;
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}
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void Script::completeThread(void) {
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for (int i = 0; i < 40 && !_threadList.isEmpty() ; i++)
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executeThreads(0);
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}
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int Script::SThreadDebugStep() {
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if (_dbg_singlestep) {
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_dbg_dostep = 1;
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}
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return SUCCESS;
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}
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void Script::runThread(ScriptThread *thread, uint instructionLimit) {
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const char*operandName;
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uint instructionCount;
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uint16 savedInstructionOffset;
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byte *addr;
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uint16 param1;
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uint16 param2;
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int16 iparam1;
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int16 iparam2;
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byte argumentsCount;
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uint16 functionNumber;
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ScriptFunctionType scriptFunction;
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int debug_print = 0;
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int operandChar;
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int i;
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// Handle debug single-stepping
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if ((thread == _dbg_thread) && _dbg_singlestep) {
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if (_dbg_dostep) {
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debug_print = 1;
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thread->_sleepTime = 0;
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instructionLimit = 1;
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_dbg_dostep = 0;
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} else {
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return;
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}
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}
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MemoryReadStream scriptS(thread->_moduleBase, thread->_moduleBaseSize);
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scriptS.seek(thread->_instructionOffset);
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for (instructionCount = 0; instructionCount < instructionLimit; instructionCount++) {
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if (thread->_flags & (kTFlagAsleep))
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break;
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savedInstructionOffset = thread->_instructionOffset;
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operandChar = scriptS.readByte();
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#define CASEOP(opName) case opName: \
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if (operandChar == opName) { \
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operandName = #opName; \
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}
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debug(8, "Executing thread offset: %lu (%x) stack: %d", thread->_instructionOffset, operandChar, thread->pushedSize());
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operandName="";
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switch (operandChar) {
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CASEOP(opNextBlock)
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// Some sort of "jump to the start of the next memory
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// page" instruction, I think.
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thread->_instructionOffset = 1024 * ((thread->_instructionOffset / 1024) + 1);
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break;
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// STACK INSTRUCTIONS
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CASEOP(opDup)
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thread->push(thread->stackTop());
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break;
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CASEOP(opDrop)
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thread->pop();
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break;
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CASEOP(opZero)
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thread->push(0);
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break;
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CASEOP(opOne)
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thread->push(1);
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break;
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CASEOP(opConstint)
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CASEOP(opStrlit)
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iparam1 = scriptS.readSint16LE();
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thread->push(iparam1);
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break;
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// DATA INSTRUCTIONS
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CASEOP(opGetFlag)
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addr = thread->baseAddress(scriptS.readByte());
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param1 = scriptS.readUint16LE();
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addr += (param1 >> 3);
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param1 = (1 << (param1 & 7));
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thread->push((*addr) & param1 ? 1 : 0);
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break;
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CASEOP(opGetInt)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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thread->push(*((uint16*)addr));
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break;
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CASEOP(opPutFlag)
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addr = thread->baseAddress(scriptS.readByte());
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param1 = scriptS.readUint16LE();
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addr += (param1 >> 3);
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param1 = (1 << (param1 & 7));
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if (thread->stackTop()) {
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*addr |= param1;
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} else {
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*addr &= ~param1;
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}
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break;
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CASEOP(opPutInt)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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*(uint16*)addr = thread->stackTop();
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break;
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CASEOP(opPutFlagV)
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addr = thread->baseAddress(scriptS.readByte());
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param1 = scriptS.readUint16LE();
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addr += (param1 >> 3);
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param1 = (1 << (param1 & 7));
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if (thread->pop()) {
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*addr |= param1;
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} else {
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*addr &= ~param1;
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}
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break;
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CASEOP(opPutIntV)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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*(uint16*)addr = thread->pop();
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break;
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// FUNCTION CALL INSTRUCTIONS
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CASEOP(opCall)
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argumentsCount = scriptS.readByte();
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param1 = scriptS.readByte();
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if (param1 != kAddressModule) {
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error("Script::runThread param1 != kAddressModule");
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}
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addr = thread->baseAddress(param1);
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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thread->push(argumentsCount);
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param2 = scriptS.pos();
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// NOTE: The original pushes the program
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// counter as a pointer here. But I don't think
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// we will have to do that.
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thread->push(param2);
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thread->_instructionOffset = iparam1;
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break;
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CASEOP(opCcall)
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CASEOP(opCcallV)
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argumentsCount = scriptS.readByte();
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functionNumber = scriptS.readUint16LE();
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if (functionNumber >= SCRIPT_FUNCTION_MAX) {
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error("Script::runThread() Invalid script function number");
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}
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debug(8, "Calling 0x%X %s", functionNumber, _scriptFunctionsList[functionNumber].scriptFunctionName);
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scriptFunction = _scriptFunctionsList[functionNumber].scriptFunction;
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(this->*scriptFunction)(thread, argumentsCount);
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if (functionNumber == 16) { // SF_gotoScene
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instructionCount = instructionLimit; // break the loop
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break;
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}
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if (operandChar == opCcall) {// CALL function
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thread->push(thread->_returnValue);
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}
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if (thread->_flags & kTFlagAsleep)
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instructionCount = instructionLimit; // break out of loop!
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break;
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CASEOP(opEnter)
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thread->push(thread->_frameIndex);
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thread->_frameIndex = thread->_stackTopIndex;
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thread->_stackTopIndex -= (scriptS.readSint16LE() / 2);
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break;
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CASEOP(opReturn)
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thread->_returnValue = thread->pop();
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CASEOP(opReturnV)
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thread->_stackTopIndex = thread->_frameIndex;
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thread->_frameIndex = thread->pop();
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if (thread->pushedSize() == 0) {
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thread->_flags |= kTFlagFinished;
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break;
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} else {
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thread->_instructionOffset = thread->pop();
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iparam1 = thread->pop();
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iparam1 += iparam1;
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while (iparam1--) {
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thread->pop();
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}
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if (operandChar == opReturn) {
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thread->push(thread->_returnValue);
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}
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}
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break;
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// BRANCH INSTRUCTIONS
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CASEOP(opJmp)
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param1 = scriptS.readUint16LE();
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thread->_instructionOffset = param1;
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break;
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CASEOP(opJmpTrueV)
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param1 = scriptS.readUint16LE();
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if (thread->pop()) {
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thread->_instructionOffset = param1;
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}
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break;
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CASEOP(opJmpFalseV)
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param1 = scriptS.readUint16LE();
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if (!thread->pop()) {
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thread->_instructionOffset = param1;
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}
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break;
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CASEOP(opJmpTrue)
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param1 = scriptS.readUint16LE();
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if (thread->stackTop()) {
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thread->_instructionOffset = param1;
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}
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break;
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CASEOP(opJmpFalse)
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param1 = scriptS.readUint16LE();
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if (!thread->stackTop()) {
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thread->_instructionOffset = param1;
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}
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break;
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CASEOP(opJmpSwitch)
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iparam1 = scriptS.readSint16LE();
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param1 = thread->pop();
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while (iparam1--) {
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param2 = scriptS.readUint16LE();
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thread->_instructionOffset = scriptS.readUint16LE();
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if (param2 == param1) {
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break;
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}
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}
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if (iparam1 < 0) {
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thread->_instructionOffset = scriptS.readUint16LE();
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}
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break;
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CASEOP(opJmpRandom)
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// Supposedly the number of possible branches.
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// The original interpreter ignores it.
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scriptS.readUint16LE();
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iparam1 = scriptS.readSint16LE();
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iparam1 = _vm->_rnd.getRandomNumber(iparam1 - 1);
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while (1) {
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iparam2 = scriptS.readSint16LE();
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thread->_instructionOffset = scriptS.readUint16LE();
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iparam1 -= iparam2;
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if (iparam1 < 0) {
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break;
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}
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}
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break;
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// UNARY INSTRUCTIONS
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CASEOP(opNegate)
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thread->push(-thread->pop());
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break;
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CASEOP(opNot)
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thread->push(!thread->pop());
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break;
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CASEOP(opCompl)
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thread->push(~thread->pop());
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break;
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CASEOP(opIncV)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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*(uint16*)addr += 1;
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break;
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CASEOP(opDecV)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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*(uint16*)addr -= 1;
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break;
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CASEOP(opPostInc)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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thread->push(*(int16*)addr);
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*(uint16*)addr += 1;
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break;
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CASEOP(opPostDec)
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addr = thread->baseAddress(scriptS.readByte());
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iparam1 = scriptS.readSint16LE();
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addr += iparam1;
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thread->push(*(int16*)addr);
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*(uint16*)addr -= 1;
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break;
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// ARITHMETIC INSTRUCTIONS
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CASEOP(opAdd)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 += iparam2;
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thread->push(iparam1);
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break;
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CASEOP(opSub)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 -= iparam2;
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thread->push(iparam1);
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break;
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CASEOP(opMul)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 *= iparam2;
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thread->push(iparam1);
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break;
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CASEOP(opDiv)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 /= iparam2;
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thread->push(iparam1);
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break;
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CASEOP(opMod)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 %= iparam2;
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thread->push(iparam1);
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break;
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// COMPARISION INSTRUCTIONS
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CASEOP(opEq)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 == iparam2) ? 1 : 0);
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break;
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CASEOP(opNe)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 != iparam2) ? 1 : 0);
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break;
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CASEOP(opGt)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 > iparam2) ? 1 : 0);
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break;
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CASEOP(opLt)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 < iparam2) ? 1 : 0);
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break;
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CASEOP(opGe)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 >= iparam2) ? 1 : 0);
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break;
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CASEOP(opLe)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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thread->push((iparam1 <= iparam2) ? 1 : 0);
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break;
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// SHIFT INSTRUCTIONS
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CASEOP(opRsh)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 >>= iparam2;
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thread->push(iparam1);
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break;
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CASEOP(opLsh)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 <<= iparam2;
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thread->push(iparam1);
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break;
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// BITWISE INSTRUCTIONS
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CASEOP(opAnd)
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iparam2 = thread->pop();
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iparam1 = thread->pop();
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iparam1 &= iparam2;
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thread->push(iparam1);
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|
break;
|
|
CASEOP(opOr)
|
|
iparam2 = thread->pop();
|
|
iparam1 = thread->pop();
|
|
iparam1 |= iparam2;
|
|
thread->push(iparam1);
|
|
break;
|
|
CASEOP(opXor)
|
|
iparam2 = thread->pop();
|
|
iparam1 = thread->pop();
|
|
iparam1 ^= iparam2;
|
|
thread->push(iparam1);
|
|
break;
|
|
|
|
// LOGICAL INSTRUCTIONS
|
|
CASEOP(opLAnd)
|
|
iparam2 = thread->pop();
|
|
iparam1 = thread->pop();
|
|
thread->push((iparam1 && iparam2) ? 1 : 0);
|
|
break;
|
|
CASEOP(opLOr)
|
|
iparam2 = thread->pop();
|
|
iparam1 = thread->pop();
|
|
thread->push((iparam1 || iparam2) ? 1 : 0);
|
|
break;
|
|
CASEOP(opLXor)
|
|
iparam2 = thread->pop();
|
|
iparam1 = thread->pop();
|
|
thread->push(((iparam1 && !iparam2) || (!iparam1 && iparam2)) ? 1 : 0);
|
|
break;
|
|
|
|
// GAME INSTRUCTIONS
|
|
CASEOP(opSpeak) {
|
|
int stringsCount;
|
|
uint16 actorId;
|
|
uint16 speechFlags;
|
|
int sampleResourceId = -1;
|
|
int16 first;
|
|
const char *strings[ACTOR_SPEECH_STRING_MAX];
|
|
|
|
if (_vm->_actor->isSpeaking()) {
|
|
thread->wait(kWaitTypeSpeech);
|
|
return;
|
|
}
|
|
|
|
stringsCount = scriptS.readByte();
|
|
actorId = scriptS.readUint16LE();
|
|
speechFlags = scriptS.readByte();
|
|
scriptS.readUint16LE(); // x,y skip
|
|
|
|
if (stringsCount == 0)
|
|
error("opSpeak stringsCount == 0");
|
|
|
|
if (stringsCount > ACTOR_SPEECH_STRING_MAX)
|
|
error("opSpeak stringsCount=0x%X exceed ACTOR_SPEECH_STRING_MAX", stringsCount);
|
|
|
|
iparam1 = first = thread->stackTop();
|
|
for (i = 0; i < stringsCount; i++) {
|
|
iparam1 = thread->pop();
|
|
strings[i] = thread->_strings->getString(iparam1);
|
|
}
|
|
// now data contains last string index
|
|
|
|
if (_vm->getGameId() == GID_ITE_DISK_G) { // special ITE dos
|
|
if ((_vm->_scene->currentSceneNumber() == ITE_DEFAULT_SCENE) &&
|
|
(iparam1 >= 288) && (iparam1 <= (RID_SCENE1_VOICE_138 - RID_SCENE1_VOICE_009 + 288))) {
|
|
sampleResourceId = RID_SCENE1_VOICE_009 + iparam1 - 288;
|
|
}
|
|
} else {
|
|
if (thread->_voiceLUT->voicesCount > first) {
|
|
sampleResourceId = thread->_voiceLUT->voices[first];
|
|
}
|
|
}
|
|
|
|
_vm->_actor->actorSpeech(actorId, strings, stringsCount, sampleResourceId, speechFlags);
|
|
|
|
if (!(speechFlags & kSpeakAsync)) {
|
|
thread->wait(kWaitTypeSpeech);
|
|
}
|
|
}
|
|
break;
|
|
CASEOP(opDialogBegin)
|
|
if (_conversingThread) {
|
|
thread->wait(kWaitTypeDialogBegin);
|
|
return;
|
|
}
|
|
_conversingThread = thread;
|
|
_vm->_interface->converseClear();
|
|
break;
|
|
CASEOP(opDialogEnd)
|
|
if (thread == _conversingThread) {
|
|
_vm->_interface->activate();
|
|
_vm->_interface->setMode(kPanelConverse);
|
|
thread->wait(kWaitTypeDialogEnd);
|
|
}
|
|
break;
|
|
CASEOP(opReply) {
|
|
const char *str;
|
|
byte replyNum;
|
|
byte flags;
|
|
replyNum = scriptS.readByte();
|
|
flags = scriptS.readByte();
|
|
param1 = 0;
|
|
|
|
if (flags & kReplyOnce) {
|
|
param1 = scriptS.readUint16LE();
|
|
addr = thread->_staticBase + (param1 >> 3);
|
|
if (*addr & (1 << (param1 & 7))) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
str = thread->_strings->getString(thread->pop());
|
|
if (_vm->_interface->converseAddText(str, replyNum, flags, param1))
|
|
warning("Error adding ConverseText (%s, %d, %d, %d)", str, replyNum, flags, param1);
|
|
}
|
|
break;
|
|
CASEOP(opAnimate)
|
|
scriptS.readUint16LE();
|
|
scriptS.readUint16LE();
|
|
param1 = scriptS.readByte();
|
|
thread->_instructionOffset += param1;
|
|
break;
|
|
|
|
default:
|
|
error("Script::runThread() Invalid opcode encountered 0x%X", operandChar);
|
|
}
|
|
|
|
debug(8, operandName);
|
|
_vm->_console->DebugPrintf("%s\n", operandName);
|
|
|
|
|
|
if (thread->_flags & (kTFlagFinished | kTFlagAborted)) {
|
|
_vm->_console->DebugPrintf("Script finished\n");
|
|
break;
|
|
} else {
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
} // End of namespace Saga
|
|
|