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doom3-bfg/neo/swf/SWF_ScriptFunction.cpp

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2012-11-26 18:58:24 +00:00
/*
===========================================================================
Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
Doom 3 BFG Edition Source Code 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 3 of the License, or
(at your option) any later version.
Doom 3 BFG Edition Source Code 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 Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
#pragma hdrstop
#include "../idlib/precompiled.h"
idCVar swf_debug( "swf_debug", "0", CVAR_INTEGER|CVAR_ARCHIVE, "debug swf scripts. 1 shows traces/errors. 2 also shows warnings. 3 also shows disassembly. 4 shows parameters in the disassembly." );
idCVar swf_debugInvoke( "swf_debugInvoke", "0", CVAR_INTEGER, "debug swf functions being called from game." );
idSWFConstantPool::idSWFConstantPool() {
}
/*
========================
idSWFConstantPool::Clear
========================
*/
void idSWFConstantPool::Clear() {
for ( int i = 0; i < pool.Num(); i++ ) {
pool[i]->Release();
}
pool.Clear();
}
/*
========================
idSWFConstantPool::Copy
========================
*/
void idSWFConstantPool::Copy( const idSWFConstantPool & other ) {
Clear();
pool.SetNum( other.pool.Num() );
for ( int i = 0; i < pool.Num(); i++ ) {
pool[i] = other.pool[i];
pool[i]->AddRef();
}
}
/*
========================
idSWFScriptFunction_Script::~idSWFScriptFunction_Script
========================
*/
idSWFScriptFunction_Script::~idSWFScriptFunction_Script() {
for ( int i = 0; i < scope.Num(); i++ ) {
if ( verify( scope[i] ) ) {
scope[i]->Release();
}
}
if ( prototype ) {
prototype->Release();
}
}
/*
========================
idSWFScriptFunction_Script::Call
========================
*/
void idSWFScriptFunction_Script::SetScope( idList<idSWFScriptObject *> & newScope ) {
assert( scope.Num() == 0 );
for ( int i = 0; i < scope.Num(); i++ ) {
if ( verify( scope[i] ) ) {
scope[i]->Release();
}
}
scope.Clear();
scope.Append( newScope );
for ( int i = 0; i < newScope.Num(); i++ ) {
if ( verify( scope[i] ) ) {
scope[i]->AddRef();
}
}
}
/*
========================
idSWFScriptFunction_Script::Call
========================
*/
idSWFScriptVar idSWFScriptFunction_Script::Call( idSWFScriptObject * thisObject, const idSWFParmList & parms ) {
idSWFBitStream bitstream( data, length, false );
// We assume scope[0] is the global scope
assert( scope.Num() > 0 );
if ( thisObject == NULL ) {
thisObject = scope[0];
}
idSWFScriptObject * locals = idSWFScriptObject::Alloc();
idSWFStack stack;
stack.SetNum( parms.Num() + 1 );
for ( int i = 0; i < parms.Num(); i++ ) {
stack[ parms.Num() - i - 1 ] = parms[i];
// Unfortunately at this point we don't have the function name anymore, so our warning messages aren't very detailed
if ( i < parameters.Num() ) {
if ( parameters[i].reg > 0 && parameters[i].reg < registers.Num() ) {
registers[ parameters[i].reg ] = parms[i];
}
locals->Set( parameters[i].name, parms[i] );
}
}
// Set any additional parameters to undefined
for ( int i = parms.Num(); i < parameters.Num(); i++ ) {
if ( parameters[i].reg > 0 && parameters[i].reg < registers.Num() ) {
registers[ parameters[i].reg ].SetUndefined();
}
locals->Set( parameters[i].name, idSWFScriptVar() );
}
stack.A().SetInteger( parms.Num() );
int preloadReg = 1;
if ( flags & BIT( 0 ) ) {
// load "this" into a register
registers[ preloadReg ].SetObject( thisObject );
preloadReg++;
}
if ( ( flags & BIT( 1 ) ) == 0 ) {
// create "this"
locals->Set( "this", idSWFScriptVar( thisObject ) );
}
if ( flags & BIT( 2 ) ) {
idSWFScriptObject * arguments = idSWFScriptObject::Alloc();
// load "arguments" into a register
arguments->MakeArray();
int numElements = parms.Num();
for ( int i = 0; i < numElements; i++ ) {
arguments->Set( i, parms[i] );
}
registers[ preloadReg ].SetObject( arguments );
preloadReg++;
arguments->Release();
}
if ( ( flags & BIT( 3 ) ) == 0 ) {
idSWFScriptObject * arguments = idSWFScriptObject::Alloc();
// create "arguments"
arguments->MakeArray();
int numElements = parms.Num();
for ( int i = 0; i < numElements; i++ ) {
arguments->Set( i, parms[i] );
}
locals->Set( "arguments", idSWFScriptVar( arguments ) );
arguments->Release();
}
if ( flags & BIT( 4 ) ) {
// load "super" into a register
registers[ preloadReg ].SetObject( thisObject->GetPrototype() );
preloadReg++;
}
if ( ( flags & BIT( 5 ) ) == 0 ) {
// create "super"
locals->Set( "super", idSWFScriptVar( thisObject->GetPrototype() ) );
}
if ( flags & BIT( 6 ) ) {
// preload _root
registers[ preloadReg ] = scope[0]->Get( "_root" );
preloadReg++;
}
if ( flags & BIT( 7 ) ) {
// preload _parent
if ( thisObject->GetSprite() != NULL && thisObject->GetSprite()->parent != NULL ) {
registers[ preloadReg ].SetObject( thisObject->GetSprite()->parent->scriptObject );
} else {
registers[ preloadReg ].SetNULL();
}
preloadReg++;
}
if ( flags & BIT( 8 ) ) {
// load "_global" into a register
registers[ preloadReg ].SetObject( scope[0] );
preloadReg++;
}
int scopeSize = scope.Num();
scope.Append( locals );
locals->AddRef();
idSWFScriptVar retVal = Run( thisObject, stack, bitstream );
assert( scope.Num() == scopeSize + 1 );
for ( int i = scopeSize; i < scope.Num(); i++ ) {
if ( verify( scope[i] ) ) {
scope[i]->Release();
}
}
scope.SetNum( scopeSize );
locals->Release();
locals = NULL;
return retVal;
}
/*
========================
<anonymous>::Split
========================
*/
namespace {
const char * GetPropertyName( int index ) {
switch ( index ) {
case 0: return "_x";
case 1: return "_y";
case 2: return "_xscale";
case 3: return "_yscale";
case 4: return "_currentframe";
case 5: return "_totalframes";
case 6: return "_alpha";
case 7: return "_visible";
case 8: return "_width";
case 9: return "_height";
case 10: return "_rotation";
case 11: return "_target";
case 12: return "_framesloaded";
case 13: return "_name";
case 14: return "_droptarget";
case 15: return "_url";
case 16: return "_highquality";
case 17: return "_focusrect";
case 18: return "_soundbuftime";
case 19: return "_quality";
case 20: return "_mousex";
case 21: return "_mousey";
}
return "";
}
const char *GetSwfActionName(swfAction_t code)
{
switch (code)
{
case Action_End: return "Action_End";
// swf 3
case Action_NextFrame: return "Action_NextFrame";
case Action_PrevFrame: return "Action_PrevFrame";
case Action_Play: return "Action_Play";
case Action_Stop: return "Action_Stop";
case Action_ToggleQuality: return "Action_ToggleQuality";
case Action_StopSounds: return "Action_StopSounds";
case Action_GotoFrame: return "Action_GotoFrame";
case Action_GetURL: return "Action_GetURL";
case Action_WaitForFrame: return "Action_WaitForFrame";
case Action_SetTarget: return "Action_SetTarget";
case Action_GoToLabel: return "Action_GoToLabel";
// swf 4
case Action_Add: return "Action_Add";
case Action_Subtract: return "Action_Subtract";
case Action_Multiply: return "Action_Multiply";
case Action_Divide: return "Action_Divide";
case Action_Equals: return "Action_Equals";
case Action_Less: return "Action_Less";
case Action_And: return "Action_And";
case Action_Or: return "Action_Or";
case Action_Not: return "Action_Not";
case Action_StringEquals: return "Action_StringEquals";
case Action_StringLength: return "Action_StringLength";
case Action_StringExtract: return "Action_StringExtract";
case Action_Pop: return "Action_Pop";
case Action_ToInteger: return "Action_ToInteger";
case Action_GetVariable: return "Action_GetVariable";
case Action_SetVariable: return "Action_SetVariable";
case Action_SetTarget2: return "Action_SetTarget2";
case Action_StringAdd: return "Action_StringAdd";
case Action_GetProperty: return "Action_GetProperty";
case Action_SetProperty: return "Action_SetProperty";
case Action_CloneSprite: return "Action_CloneSprite";
case Action_RemoveSprite: return "Action_RemoveSprite";
case Action_Trace: return "Action_Trace";
case Action_StartDrag: return "Action_StartDrag";
case Action_EndDrag: return "Action_EndDrag";
case Action_StringLess: return "Action_StringLess";
case Action_RandomNumber: return "Action_RandomNumber";
case Action_MBStringLength: return "Action_MBStringLength";
case Action_CharToAscii: return "Action_CharToAscii";
case Action_AsciiToChar: return "Action_AsciiToChar";
case Action_GetTime: return "Action_GetTime";
case Action_MBStringExtract: return "Action_MBStringExtract";
case Action_MBCharToAscii: return "Action_MBCharToAscii";
case Action_MBAsciiToChar: return "Action_MBAsciiToChar";
case Action_WaitForFrame2: return "Action_WaitForFrame2";
case Action_Push: return "Action_Push";
case Action_Jump: return "Action_Jump";
case Action_GetURL2: return "Action_GetURL2";
case Action_If: return "Action_If";
case Action_Call: return "Action_Call";
case Action_GotoFrame2: return "Action_GotoFrame2";
// swf 5
case Action_Delete: return "Action_Delete";
case Action_Delete2: return "Action_Delete2";
case Action_DefineLocal: return "Action_DefineLocal";
case Action_CallFunction: return "Action_CallFunction";
case Action_Return: return "Action_Return";
case Action_Modulo: return "Action_Modulo";
case Action_NewObject: return "Action_NewObject";
case Action_DefineLocal2: return "Action_DefineLocal2";
case Action_InitArray: return "Action_InitArray";
case Action_InitObject: return "Action_InitObject";
case Action_TypeOf: return "Action_TypeOf";
case Action_TargetPath: return "Action_TargetPath";
case Action_Enumerate: return "Action_Enumerate";
case Action_Add2: return "Action_Add2";
case Action_Less2: return "Action_Less2";
case Action_Equals2: return "Action_Equals2";
case Action_ToNumber: return "Action_ToNumber";
case Action_ToString: return "Action_ToString";
case Action_PushDuplicate: return "Action_PushDuplicate";
case Action_StackSwap: return "Action_StackSwap";
case Action_GetMember: return "Action_GetMember";
case Action_SetMember: return "Action_SetMember";
case Action_Increment: return "Action_Increment";
case Action_Decrement: return "Action_Decrement";
case Action_CallMethod: return "Action_CallMethod";
case Action_NewMethod: return "Action_NewMethod";
case Action_BitAnd: return "Action_BitAnd";
case Action_BitOr: return "Action_BitOr";
case Action_BitXor: return "Action_BitXor";
case Action_BitLShift: return "Action_BitLShift";
case Action_BitRShift: return "Action_BitRShift";
case Action_BitURShift: return "Action_BitURShift";
case Action_StoreRegister: return "Action_StoreRegister";
case Action_ConstantPool: return "Action_ConstantPool";
case Action_With: return "Action_With";
case Action_DefineFunction: return "Action_DefineFunction";
// swf 6
case Action_InstanceOf: return "Action_InstanceOf";
case Action_Enumerate2: return "Action_Enumerate2";
case Action_StrictEquals: return "Action_StrictEquals";
case Action_Greater: return "Action_Greater";
case Action_StringGreater: return "Action_StringGreater";
// swf 7
case Action_Extends: return "Action_Extends";
case Action_CastOp: return "Action_CastOp";
case Action_ImplementsOp: return "Action_ImplementsOp";
case Action_Throw: return "Action_Throw";
case Action_Try: return "Action_Try";
case Action_DefineFunction2: return "Action_DefineFunction2";
default:
return "UNKNOWN CODE";
}
}
}
/*
========================
idSWFScriptFunction_Script::Run
========================
*/
idSWFScriptVar idSWFScriptFunction_Script::Run( idSWFScriptObject * thisObject, idSWFStack & stack, idSWFBitStream & bitstream ) {
static int callstackLevel = -1;
idSWFSpriteInstance * thisSprite = thisObject->GetSprite();
idSWFSpriteInstance * currentTarget = thisSprite;
if ( currentTarget == NULL ) {
thisSprite = currentTarget = defaultSprite;
}
callstackLevel++;
while ( bitstream.Tell() < bitstream.Length() ) {
swfAction_t code = (swfAction_t)bitstream.ReadU8();
uint16 recordLength = 0;
if ( code >= 0x80 ) {
recordLength = bitstream.ReadU16();
}
if ( swf_debug.GetInteger() >= 3 ) {
// stack[0] is always 0 so don't read it
if ( swf_debug.GetInteger() >= 4 ) {
for ( int i = stack.Num()-1; i >= 0 ; i-- ) {
idLib::Printf(" %c: %s (%s)\n", (char)(64 + stack.Num() - i), stack[i].ToString().c_str(), stack[i].TypeOf());
}
for ( int i = 0; i < registers.Num(); i++ ) {
if ( !registers[i].IsUndefined() ) {
idLib::Printf(" R%d: %s (%s)\n", i, registers[i].ToString().c_str(), registers[i].TypeOf());
}
}
}
idLib::Printf( "SWF%d: code %s\n", callstackLevel, GetSwfActionName(code) );
}
switch ( code ) {
case Action_Return:
callstackLevel--;
return stack.A();
case Action_End:
callstackLevel--;
return idSWFScriptVar();
case Action_NextFrame:
if ( verify( currentTarget != NULL ) ) {
currentTarget->NextFrame();
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for nextFrame\n" );
}
break;
case Action_PrevFrame:
if ( verify( currentTarget != NULL ) ) {
currentTarget->PrevFrame();
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for prevFrame\n" );
}
break;
case Action_Play:
if ( verify( currentTarget != NULL ) ) {
currentTarget->Play();
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for play\n" );
}
break;
case Action_Stop:
if ( verify( currentTarget != NULL ) ) {
currentTarget->Stop();
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for stop\n" );
}
break;
case Action_ToggleQuality: break;
case Action_StopSounds: break;
case Action_GotoFrame: {
assert( recordLength == 2 );
int frameNum = bitstream.ReadU16() + 1;
if ( verify( currentTarget != NULL ) ) {
currentTarget->RunTo( frameNum );
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for runTo %d\n", frameNum );
}
break;
}
case Action_SetTarget: {
const char * targetName = (const char *)bitstream.ReadData( recordLength );
if ( verify( thisSprite != NULL ) ) {
currentTarget = thisSprite->ResolveTarget( targetName );
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for setTarget %s\n", targetName );
}
break;
}
case Action_GoToLabel: {
const char * targetName = (const char *)bitstream.ReadData( recordLength );
if ( verify( currentTarget != NULL ) ) {
currentTarget->RunTo( currentTarget->FindFrame( targetName ) );
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for runTo %s\n", targetName );
}
break;
}
case Action_Push: {
idSWFBitStream pushstream( bitstream.ReadData( recordLength ), recordLength, false );
while ( pushstream.Tell() < pushstream.Length() ) {
uint8 type = pushstream.ReadU8();
switch ( type ) {
case 0: stack.Alloc().SetString( pushstream.ReadString() ); break;
case 1: stack.Alloc().SetFloat( pushstream.ReadFloat() ); break;
case 2: stack.Alloc().SetNULL(); break;
case 3: stack.Alloc().SetUndefined(); break;
case 4: stack.Alloc() = registers[ pushstream.ReadU8() ]; break;
case 5: stack.Alloc().SetBool( pushstream.ReadU8() != 0 ); break;
case 6: stack.Alloc().SetFloat( (float)pushstream.ReadDouble() ); break;
case 7: stack.Alloc().SetInteger( pushstream.ReadS32() ); break;
case 8: stack.Alloc().SetString( constants.Get( pushstream.ReadU8() ) ); break;
case 9: stack.Alloc().SetString( constants.Get( pushstream.ReadU16() ) ); break;
}
}
break;
}
case Action_Pop:
stack.Pop( 1 );
break;
case Action_Add:
stack.B().SetFloat( stack.B().ToFloat() + stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_Subtract:
stack.B().SetFloat( stack.B().ToFloat() - stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_Multiply:
stack.B().SetFloat( stack.B().ToFloat() * stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_Divide:
stack.B().SetFloat( stack.B().ToFloat() / stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_Equals:
stack.B().SetBool( stack.B().ToFloat() == stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_Less:
stack.B().SetBool( stack.B().ToFloat() < stack.A().ToFloat() );
stack.Pop( 1 );
break;
case Action_And:
stack.B().SetBool( stack.B().ToBool() && stack.A().ToBool() );
stack.Pop( 1 );
break;
case Action_Or:
stack.B().SetBool( stack.B().ToBool() || stack.A().ToBool() );
stack.Pop( 1 );
break;
case Action_Not:
stack.A().SetBool( !stack.A().ToBool() );
break;
case Action_StringEquals:
stack.B().SetBool( stack.B().ToString() == stack.A().ToString() );
stack.Pop( 1 );
break;
case Action_StringLength:
stack.A().SetInteger( stack.A().ToString().Length() );
break;
case Action_StringAdd:
stack.B().SetString( stack.B().ToString() + stack.A().ToString() );
stack.Pop( 1 );
break;
case Action_StringExtract:
stack.C().SetString( stack.C().ToString().Mid( stack.B().ToInteger(), stack.A().ToInteger() ) );
stack.Pop( 2 );
break;
case Action_StringLess:
stack.B().SetBool( stack.B().ToString() < stack.A().ToString() );
stack.Pop( 1 );
break;
case Action_StringGreater:
stack.B().SetBool( stack.B().ToString() > stack.A().ToString() );
stack.Pop( 1 );
break;
case Action_ToInteger:
stack.A().SetInteger( stack.A().ToInteger() );
break;
case Action_CharToAscii:
stack.A().SetInteger( stack.A().ToString()[0] );
break;
case Action_AsciiToChar:
stack.A().SetString( va( "%c", stack.A().ToInteger() ) );
break;
case Action_Jump:
bitstream.Seek( bitstream.ReadS16() );
break;
case Action_If: {
int16 offset = bitstream.ReadS16();
if ( stack.A().ToBool() ) {
bitstream.Seek( offset );
}
stack.Pop( 1 );
break;
}
case Action_GetVariable: {
idStr variableName = stack.A().ToString();
for ( int i = scope.Num() - 1; i >= 0; i-- ) {
stack.A() = scope[i]->Get( variableName );
if ( !stack.A().IsUndefined() ) {
break;
}
}
if ( stack.A().IsUndefined() && swf_debug.GetInteger() > 1 ) {
idLib::Printf( "SWF: unknown variable %s\n", variableName.c_str() );
}
break;
}
case Action_SetVariable: {
idStr variableName = stack.B().ToString();
bool found = false;
for ( int i = scope.Num() - 1; i >= 0; i-- ) {
if ( scope[i]->HasProperty( variableName ) ) {
scope[i]->Set( variableName, stack.A() );
found = true;
break;
}
}
if ( !found ) {
thisObject->Set( variableName, stack.A() );
}
stack.Pop( 2 );
break;
}
case Action_GotoFrame2: {
uint32 frameNum = 0;
uint8 flags = bitstream.ReadU8();
if ( flags & 2 ) {
frameNum += bitstream.ReadU16();
}
if ( verify( thisSprite != NULL ) ) {
if ( stack.A().IsString() ) {
frameNum += thisSprite->FindFrame( stack.A().ToString() );
} else {
frameNum += (uint32)stack.A().ToInteger();
}
if ( ( flags & 1 ) != 0 ){
thisSprite->Play();
} else {
thisSprite->Stop();
}
thisSprite->RunTo( frameNum );
} else if ( swf_debug.GetInteger() > 0 ) {
if ( ( flags & 1 ) != 0 ){
idLib::Printf( "SWF: no target movie clip for gotoAndPlay\n" );
} else {
idLib::Printf( "SWF: no target movie clip for gotoAndStop\n" );
}
}
stack.Pop( 1 );
break;
}
case Action_GetProperty: {
if ( verify( thisSprite != NULL ) ) {
idSWFSpriteInstance * target = thisSprite->ResolveTarget( stack.B().ToString() );
stack.B() = target->scriptObject->Get( GetPropertyName( stack.A().ToInteger() ) );
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for getProperty\n" );
}
stack.Pop( 1 );
break;
}
case Action_SetProperty: {
if ( verify( thisSprite != NULL ) ) {
idSWFSpriteInstance * target = thisSprite->ResolveTarget( stack.C().ToString() );
target->scriptObject->Set( GetPropertyName( stack.B().ToInteger() ), stack.A() );
} else if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: no target movie clip for setProperty\n" );
}
stack.Pop( 3 );
break;
}
case Action_Trace:
idLib::PrintfIf( swf_debug.GetInteger() > 0, "SWF Trace: %s\n", stack.A().ToString().c_str() );
stack.Pop( 1 );
break;
case Action_GetTime:
stack.Alloc().SetInteger( Sys_Milliseconds() );
break;
case Action_RandomNumber:
assert( thisSprite && thisSprite->sprite && thisSprite->sprite->GetSWF() );
stack.A().SetInteger( thisSprite->sprite->GetSWF()->GetRandom().RandomInt( stack.A().ToInteger() ) );
break;
case Action_CallFunction: {
idStr functionName = stack.A().ToString();
idSWFScriptVar function;
idSWFScriptObject * object = NULL;
for ( int i = scope.Num() - 1; i >= 0; i-- ) {
function = scope[i]->Get( functionName );
if ( !function.IsUndefined() ) {
object = scope[i];
break;
}
}
stack.Pop( 1 );
idSWFParmList parms;
parms.SetNum( stack.A().ToInteger() );
stack.Pop( 1 );
for ( int i = 0; i < parms.Num(); i++ ) {
parms[i] = stack.A();
stack.Pop( 1 );
}
if ( function.IsFunction() && verify( object ) ) {
stack.Alloc() = function.GetFunction()->Call( object, parms );
} else {
idLib::PrintfIf( swf_debug.GetInteger() > 0, "SWF: unknown function %s\n", functionName.c_str() );
stack.Alloc().SetUndefined();
}
break;
}
case Action_CallMethod: {
idStr functionName = stack.A().ToString();
// If the top stack is undefined but there is an object, it's calling the constructor
if ( functionName.IsEmpty() || stack.A().IsUndefined() || stack.A().IsNULL() ) {
functionName = "__constructor__";
}
idSWFScriptObject * object = NULL;
idSWFScriptVar function;
if ( stack.B().IsObject() ) {
object = stack.B().GetObject();
function = object->Get( functionName );
if ( !function.IsFunction() ) {
idLib::PrintfIf( swf_debug.GetInteger() > 1, "SWF: unknown method %s on %s\n", functionName.c_str(), object->DefaultValue( true ).ToString().c_str() );
}
} else {
idLib::PrintfIf( swf_debug.GetInteger() > 1, "SWF: NULL object for method %s\n", functionName.c_str() );
}
stack.Pop( 2 );
idSWFParmList parms;
parms.SetNum( stack.A().ToInteger() );
stack.Pop( 1 );
for ( int i = 0; i < parms.Num(); i++ ) {
parms[i] = stack.A();
stack.Pop( 1 );
}
if ( function.IsFunction() ) {
stack.Alloc() = function.GetFunction()->Call( object, parms );
} else {
stack.Alloc().SetUndefined();
}
break;
}
case Action_ConstantPool: {
constants.Clear();
uint16 numConstants = bitstream.ReadU16();
for ( int i = 0; i < numConstants; i++ ) {
constants.Append( idSWFScriptString::Alloc( bitstream.ReadString() ) );
}
break;
}
case Action_DefineFunction: {
idStr functionName = bitstream.ReadString();
idSWFScriptFunction_Script * newFunction = idSWFScriptFunction_Script::Alloc();
newFunction->SetScope( scope );
newFunction->SetConstants( constants );
newFunction->SetDefaultSprite( defaultSprite );
uint16 numParms = bitstream.ReadU16();
newFunction->AllocParameters( numParms );
for ( int i = 0; i < numParms; i++ ) {
newFunction->SetParameter( i, 0, bitstream.ReadString() );
}
uint16 codeSize = bitstream.ReadU16();
newFunction->SetData( bitstream.ReadData( codeSize ), codeSize );
if ( functionName.IsEmpty() ) {
stack.Alloc().SetFunction( newFunction );
} else {
thisObject->Set( functionName, idSWFScriptVar( newFunction ) );
}
newFunction->Release();
break;
}
case Action_DefineFunction2: {
idStr functionName = bitstream.ReadString();
idSWFScriptFunction_Script * newFunction = idSWFScriptFunction_Script::Alloc();
newFunction->SetScope( scope );
newFunction->SetConstants( constants );
newFunction->SetDefaultSprite( defaultSprite );
uint16 numParms = bitstream.ReadU16();
// The number of registers is from 0 to 255, although valid values are 1 to 256.
// There must always be at least one register for DefineFunction2, to hold "this" or "super" when required.
uint8 numRegs = bitstream.ReadU8() + 1;
// Note that SWF byte-ordering causes the flag bits to be reversed per-byte
// from how the swf_file_format_spec_v10.pdf document describes the ordering in ActionDefineFunction2.
// PreloadThisFlag is byte 0, not 7, PreloadGlobalFlag is 8, not 15.
uint16 flags = bitstream.ReadU16();
newFunction->AllocParameters( numParms );
newFunction->AllocRegisters( numRegs );
newFunction->SetFlags( flags );
for ( int i = 0; i < numParms; i++ ) {
uint8 reg = bitstream.ReadU8();
const char * name = bitstream.ReadString();
if ( reg >= numRegs ) {
idLib::Warning( "SWF: Parameter %s in function %s bound to out of range register %d", name, functionName.c_str(), reg );
reg = 0;
}
newFunction->SetParameter( i, reg, name );
}
uint16 codeSize = bitstream.ReadU16();
newFunction->SetData( bitstream.ReadData( codeSize ), codeSize );
if ( functionName.IsEmpty() ) {
stack.Alloc().SetFunction( newFunction );
} else {
thisObject->Set( functionName, idSWFScriptVar( newFunction ) );
}
newFunction->Release();
break;
}
case Action_Enumerate: {
idStr variableName = stack.A().ToString();
for ( int i = scope.Num() - 1; i >= 0; i-- ) {
stack.A() = scope[i]->Get( variableName );
if ( !stack.A().IsUndefined() ) {
break;
}
}
if ( !stack.A().IsObject() ) {
stack.A().SetNULL();
} else {
idSWFScriptObject * object = stack.A().GetObject();
object->AddRef();
stack.A().SetNULL();
for ( int i = 0; i < object->NumVariables(); i++ ) {
stack.Alloc().SetString( object->EnumVariable( i ) );
}
object->Release();
}
break;
}
case Action_Enumerate2: {
if ( !stack.A().IsObject() ) {
stack.A().SetNULL();
} else {
idSWFScriptObject * object = stack.A().GetObject();
object->AddRef();
stack.A().SetNULL();
for ( int i = 0; i < object->NumVariables(); i++ ) {
stack.Alloc().SetString( object->EnumVariable( i ) );
}
object->Release();
}
break;
}
case Action_Equals2: {
stack.B().SetBool( stack.A().AbstractEquals( stack.B() ) );
stack.Pop( 1 );
break;
}
case Action_StrictEquals: {
stack.B().SetBool( stack.A().StrictEquals( stack.B() ) );
stack.Pop( 1 );
break;
}
case Action_GetMember: {
if ( ( stack.B().IsUndefined() || stack.B().IsNULL() ) && swf_debug.GetInteger() > 1 ) {
idLib::Printf( "SWF: tried to get member %s on an invalid object in sprite '%s'\n", stack.A().ToString().c_str(), thisSprite != NULL ? thisSprite->GetName() : "" );
}
if ( stack.B().IsObject() ) {
idSWFScriptObject * object = stack.B().GetObject();
if ( stack.A().IsNumeric() ) {
stack.B() = object->Get( stack.A().ToInteger() );
} else {
stack.B() = object->Get( stack.A().ToString() );
}
if ( stack.B().IsUndefined() && swf_debug.GetInteger() > 1 ) {
idLib::Printf( "SWF: unknown member %s\n", stack.A().ToString().c_str() );
}
} else if ( stack.B().IsString() ) {
idStr propertyName = stack.A().ToString();
if ( propertyName.Cmp( "length" ) == 0 ) {
stack.B().SetInteger( stack.B().ToString().Length() );
} else if ( propertyName.Cmp( "value" ) == 0 ) {
// Do nothing
} else {
stack.B().SetUndefined();
}
} else if ( stack.B().IsFunction() ) {
idStr propertyName = stack.A().ToString();
if ( propertyName.Cmp( "prototype" ) == 0 ) {
// if this is a function, it's a class definition function, and it just wants the prototype object
// create it if it hasn't been already, and return it
idSWFScriptFunction * sfs = stack.B().GetFunction();
idSWFScriptObject * object = sfs->GetPrototype();
if ( object == NULL ) {
object = idSWFScriptObject::Alloc();
// Set the __proto__ to the main Object prototype
idSWFScriptVar baseObjConstructor = scope[0]->Get( "Object" );
idSWFScriptFunction *baseObj = baseObjConstructor.GetFunction();
object->Set( "__proto__", baseObj->GetPrototype() );
sfs->SetPrototype( object );
}
stack.B() = idSWFScriptVar( object );
} else {
stack.B().SetUndefined();
}
} else {
stack.B().SetUndefined();
}
stack.Pop( 1 );
break;
}
case Action_SetMember: {
if ( stack.C().IsObject() ) {
idSWFScriptObject * object = stack.C().GetObject();
if ( stack.B().IsNumeric() ) {
object->Set( stack.B().ToInteger(), stack.A() );
} else {
object->Set( stack.B().ToString(), stack.A() );
}
}
stack.Pop( 3 );
break;
}
case Action_InitArray: {
idSWFScriptObject * object = idSWFScriptObject::Alloc();
object->MakeArray();
int numElements = stack.A().ToInteger();
stack.Pop( 1 );
for ( int i = 0; i < numElements; i++ ) {
object->Set( i, stack.A() );
stack.Pop( 1 );
}
stack.Alloc().SetObject( object );
object->Release();
break;
}
case Action_InitObject: {
idSWFScriptObject * object = idSWFScriptObject::Alloc();
int numElements = stack.A().ToInteger();
stack.Pop( 1 );
for ( int i = 0; i < numElements; i++ ) {
object->Set( stack.B().ToString(), stack.A() );
stack.Pop( 2 );
}
stack.Alloc().SetObject( object );
object->Release();
break;
}
case Action_NewObject: {
idSWFScriptObject * object = idSWFScriptObject::Alloc();
idStr functionName = stack.A().ToString();
stack.Pop( 1 );
if ( functionName.Cmp( "Array" ) == 0 ) {
object->MakeArray();
int numElements = stack.A().ToInteger();
stack.Pop( 1 );
for ( int i = 0; i < numElements; i++ ) {
object->Set( i, stack.A() );
stack.Pop( 1 );
}
idSWFScriptVar baseObjConstructor = scope[0]->Get( "Object" );
idSWFScriptFunction *baseObj = baseObjConstructor.GetFunction();
object->Set( "__proto__", baseObj->GetPrototype() );
// object prototype is not set here because it will be auto created from Object later
} else {
idSWFParmList parms;
parms.SetNum( stack.A().ToInteger() );
stack.Pop( 1 );
for ( int i = 0; i < parms.Num(); i++ ) {
parms[i] = stack.A();
stack.Pop( 1 );
}
idSWFScriptVar objdef = scope[0]->Get( functionName );
if ( objdef.IsFunction() ) {
idSWFScriptFunction * constructorFunction = objdef.GetFunction();
object->Set( "__proto__", constructorFunction->GetPrototype() );
object->SetPrototype( constructorFunction->GetPrototype() );
constructorFunction->Call( object, parms );
} else {
idLib::Warning( "SWF: Unknown class definition %s", functionName.c_str() );
}
}
stack.Alloc().SetObject( object );
object->Release();
break;
}
case Action_Extends: {
idSWFScriptFunction * superclassConstructorFunction = stack.A().GetFunction();
idSWFScriptFunction *subclassConstructorFunction = stack.B().GetFunction();
stack.Pop( 2 );
idSWFScriptObject * scriptObject = idSWFScriptObject::Alloc();
scriptObject->SetPrototype( superclassConstructorFunction->GetPrototype() );
scriptObject->Set( "__proto__", idSWFScriptVar( superclassConstructorFunction->GetPrototype() ) );
scriptObject->Set( "__constructor__", idSWFScriptVar( superclassConstructorFunction ) );
subclassConstructorFunction->SetPrototype( scriptObject );
scriptObject->Release();
break;
}
case Action_TargetPath: {
if ( !stack.A().IsObject() ) {
stack.A().SetUndefined();
} else {
idSWFScriptObject * object = stack.A().GetObject();
if ( object->GetSprite() == NULL ) {
stack.A().SetUndefined();
} else {
idStr dotName = object->GetSprite()->name.c_str();
for ( idSWFSpriteInstance * target = object->GetSprite()->parent; target != NULL; target = target->parent ) {
dotName = target->name + "." + dotName;
}
stack.A().SetString( dotName );
}
}
break;
}
case Action_With: {
int withSize = bitstream.ReadU16();
idSWFBitStream bitstream2( bitstream.ReadData( withSize ), withSize, false );
if ( stack.A().IsObject() ) {
idSWFScriptObject * withObject = stack.A().GetObject();
withObject->AddRef();
stack.Pop( 1 );
scope.Append( withObject );
Run( thisObject, stack, bitstream2 );
scope.SetNum( scope.Num() - 1 );
withObject->Release();
} else {
if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: with() invalid object specified\n" );
}
stack.Pop( 1 );
}
break;
}
case Action_ToNumber:
stack.A().SetFloat( stack.A().ToFloat() );
break;
case Action_ToString:
stack.A().SetString( stack.A().ToString() );
break;
case Action_TypeOf:
stack.A().SetString( stack.A().TypeOf() );
break;
case Action_Add2: {
if ( stack.A().IsString() || stack.B().IsString() ) {
stack.B().SetString( stack.B().ToString() + stack.A().ToString() );
} else {
stack.B().SetFloat( stack.B().ToFloat() + stack.A().ToFloat() );
}
stack.Pop( 1 );
break;
}
case Action_Less2: {
if ( stack.A().IsString() && stack.B().IsString() ) {
stack.B().SetBool( stack.B().ToString() < stack.A().ToString() );
} else {
stack.B().SetBool( stack.B().ToFloat() < stack.A().ToFloat() );
}
stack.Pop( 1 );
break;
}
case Action_Greater: {
if ( stack.A().IsString() && stack.B().IsString() ) {
stack.B().SetBool( stack.B().ToString() > stack.A().ToString() );
} else {
stack.B().SetBool( stack.B().ToFloat() > stack.A().ToFloat() );
}
stack.Pop( 1 );
break;
}
case Action_Modulo: {
int32 a = stack.A().ToInteger();
int32 b = stack.B().ToInteger();
if ( a == 0 ) {
stack.B().SetUndefined();
} else {
stack.B().SetInteger( b % a );
}
stack.Pop( 1 );
break;
}
case Action_BitAnd:
stack.B().SetInteger( stack.B().ToInteger() & stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_BitLShift:
stack.B().SetInteger( stack.B().ToInteger() << stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_BitOr:
stack.B().SetInteger( stack.B().ToInteger() | stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_BitRShift:
stack.B().SetInteger( stack.B().ToInteger() >> stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_BitURShift:
stack.B().SetInteger( (uint32)stack.B().ToInteger() >> stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_BitXor:
stack.B().SetInteger( stack.B().ToInteger() ^ stack.A().ToInteger() );
stack.Pop( 1 );
break;
case Action_Decrement:
stack.A().SetFloat( stack.A().ToFloat() - 1.0f );
break;
case Action_Increment:
stack.A().SetFloat( stack.A().ToFloat() + 1.0f );
break;
case Action_PushDuplicate: {
idSWFScriptVar dup = stack.A();
stack.Alloc() = dup;
break;
}
case Action_StackSwap: {
idSWFScriptVar temp = stack.A();
stack.A() = stack.B();
stack.A() = temp;
break;
}
case Action_StoreRegister: {
uint8 registerNumber = bitstream.ReadU8();
registers[ registerNumber ] = stack.A();
break;
}
case Action_DefineLocal: {
scope[scope.Num()-1]->Set( stack.B().ToString(), stack.A() );
stack.Pop( 2 );
break;
}
case Action_DefineLocal2: {
scope[scope.Num()-1]->Set( stack.A().ToString(), idSWFScriptVar() );
stack.Pop( 1 );
break;
}
case Action_Delete: {
if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: Delete ignored\n" );
}
// We no longer support deleting variables because the performance cost of updating the hash tables is not worth it
stack.Pop( 2 );
break;
}
case Action_Delete2: {
if ( swf_debug.GetInteger() > 0 ) {
idLib::Printf( "SWF: Delete2 ignored\n" );
}
// We no longer support deleting variables because the performance cost of updating the hash tables is not worth it
stack.Pop( 1 );
break;
}
// These are functions we just don't support because we never really needed to
case Action_CloneSprite:
case Action_RemoveSprite:
case Action_Call:
case Action_SetTarget2:
case Action_NewMethod:
default:
idLib::Warning( "SWF: Unhandled Action %s", idSWF::GetActionName( code ) );
// We have to abort here because the rest of the script is basically meaningless now
assert( false );
callstackLevel--;
return idSWFScriptVar();
}
}
callstackLevel--;
return idSWFScriptVar();
}
/*
========================
idSWF::Invoke
========================
*/
void idSWF::Invoke( const char * functionName, const idSWFParmList & parms ) {
idSWFScriptObject * obj = mainspriteInstance->GetScriptObject();
idSWFScriptVar scriptVar = obj->Get( functionName );
if ( swf_debugInvoke.GetBool() ) {
idLib::Printf( "SWF: Invoke %s with %d parms (%s)\n", functionName, parms.Num(), GetName() );
}
if ( scriptVar.IsFunction() ) {
scriptVar.GetFunction()->Call( NULL, parms );
}
}
/*
========================
idSWF::Invoke
========================
*/
void idSWF::Invoke( const char * functionName, const idSWFParmList & parms, idSWFScriptVar & scriptVar ) {
if ( scriptVar.IsFunction() ) {
scriptVar.GetFunction()->Call( NULL, parms );
} else {
idSWFScriptObject * obj = mainspriteInstance->GetScriptObject();
scriptVar = obj->Get( functionName );
if ( scriptVar.IsFunction() ) {
scriptVar.GetFunction()->Call( NULL, parms );
}
}
}
/*
========================
idSWF::Invoke
========================
*/
void idSWF::Invoke( const char * functionName, const idSWFParmList & parms, bool & functionExists ) {
idSWFScriptObject * obj = mainspriteInstance->GetScriptObject();
idSWFScriptVar scriptVar = obj->Get( functionName );
if ( swf_debugInvoke.GetBool() ) {
idLib::Printf( "SWF: Invoke %s with %d parms (%s)\n", functionName, parms.Num(), GetName() );
}
if ( scriptVar.IsFunction() ) {
scriptVar.GetFunction()->Call( NULL, parms );
functionExists = true;
} else {
functionExists = false;
}
}
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