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package pt.tumba.parser.swf;
import com.anotherbigidea.flash.SWFActionCodes;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;
/**
* Parse action bytes and drive a SWFActions interface
*
*@author unknown
*@created 15 de Setembro de 2002
*/
public class ActionParser implements SWFActionCodes {
protected SWFActions actions;
protected int blockDepth = 0;
/**
* Constructor for the ActionParser object
*
*@param actions Description of the Parameter
*/
public ActionParser(SWFActions actions) {
this.actions = actions;
}
/**
* Description of the Method
*
*@param bytes Description of the Parameter
*@exception IOException Description of the Exception
*/
public synchronized void parse(byte[] bytes) throws IOException {
List records = createRecords(bytes);
processRecords(records);
}
/**
* Description of the Method
*
*@param in Description of the Parameter
*@exception IOException Description of the Exception
*/
public synchronized void parse(InStream in) throws IOException {
List records = createRecords(in);
processRecords(records);
}
/**
* Description of the Method
*
*@param records Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void processRecords(List records) throws IOException {
//--process action records
for (Iterator enumerator = records.iterator(); enumerator.hasNext(); ) {
ActionRecord rec = (ActionRecord) enumerator.next();
//actions.comment( "depth=" + rec.blockDepth );
//detect end of block
if (rec.blockDepth < blockDepth) {
blockDepth--;
actions.endBlock();
}
if (rec.label != null) {
actions.jumpLabel(rec.label);
}
int code = rec.code;
byte[] data = rec.data;
InStream in = (data != null && data.length > 0) ? new InStream(data) : null;
switch (code) {
case 0:
actions.end();
break;
//--Flash 3
case GOTO_FRAME:
actions.gotoFrame(in.readUI16());
break;
case GET_URL:
actions.getURL(in.readString(), in.readString());
break;
case NEXT_FRAME:
actions.nextFrame();
break;
case PREVIOUS_FRAME:
actions.prevFrame();
break;
case PLAY:
actions.play();
break;
case STOP:
actions.stop();
break;
case TOGGLE_QUALITY:
actions.toggleQuality();
break;
case STOP_SOUNDS:
actions.stopSounds();
break;
case WAIT_FOR_FRAME:
actions.waitForFrame(in.readUI16(), rec.jumpLabel);
break;
case SET_TARGET:
actions.setTarget(in.readString());
break;
case GOTO_LABEL:
actions.gotoFrame(in.readString());
break;
//--Flash 4
case IF:
actions.ifJump(rec.jumpLabel);
break;
case JUMP:
actions.jump(rec.jumpLabel);
break;
case WAIT_FOR_FRAME_2:
actions.waitForFrame(rec.jumpLabel);
break;
case POP:
actions.pop();
break;
case PUSH:
parsePush(data.length, in);
break;
case ADD:
actions.add();
break;
case SUBTRACT:
actions.substract();
break;
case MULTIPLY:
actions.multiply();
break;
case DIVIDE:
actions.divide();
break;
case EQUALS:
actions.equals();
break;
case LESS:
actions.lessThan();
break;
case AND:
actions.and();
break;
case OR:
actions.or();
break;
case NOT:
actions.not();
break;
case STRING_EQUALS:
actions.stringEquals();
break;
case STRING_LENGTH:
actions.stringLength();
break;
case STRING_ADD:
actions.concat();
break;
case STRING_EXTRACT:
actions.substring();
break;
case STRING_LESS:
actions.stringLessThan();
break;
case MB_STRING_EXTRACT:
actions.substringMB();
break;
case MB_STRING_LENGTH:
actions.stringLengthMB();
break;
case TO_INTEGER:
actions.toInteger();
break;
case CHAR_TO_ASCII:
actions.charToAscii();
break;
case ASCII_TO_CHAR:
actions.asciiToChar();
break;
case MB_CHAR_TO_ASCII:
actions.charMBToAscii();
break;
case MB_ASCII_TO_CHAR:
actions.asciiToCharMB();
break;
case CALL:
actions.call();
break;
case GET_VARIABLE:
actions.getVariable();
break;
case SET_VARIABLE:
actions.setVariable();
break;
case GET_URL_2:
parseGetURL2(in.readUI8());
break;
case GOTO_FRAME_2:
actions.gotoFrame(in.readUI8() != 0);
break;
case SET_TARGET_2:
actions.setTarget();
break;
case GET_PROPERTY:
actions.getProperty();
break;
case SET_PROPERTY:
actions.setProperty();
break;
case CLONE_SPRITE:
actions.cloneSprite();
break;
case REMOVE_SPRITE:
actions.removeSprite();
break;
case START_DRAG:
actions.startDrag();
break;
case END_DRAG:
actions.endDrag();
break;
case TRACE:
actions.trace();
break;
case GET_TIME:
actions.getTime();
break;
case RANDOM_NUMBER:
actions.randomNumber();
break;
//--Flash 5
case INIT_ARRAY:
actions.initArray();
break;
case LOOKUP_TABLE:
parseLookupTable(in);
break;
case CALL_FUNCTION:
actions.callFunction();
break;
case CALL_METHOD:
actions.callMethod();
break;
case DEFINE_FUNCTION:
parseDefineFunction(in);
break;
case DEFINE_LOCAL_VAL:
actions.defineLocalValue();
break;
case DEFINE_LOCAL:
actions.defineLocal();
break;
case DEL_VAR:
actions.deleteProperty();
break;
case DEL_THREAD_VARS:
actions.deleteThreadVars();
break;
case ENUMERATE:
actions.enumerate();
break;
case TYPED_EQUALS:
actions.typedEquals();
break;
case GET_MEMBER:
actions.getMember();
break;
case INIT_OBJECT:
actions.initObject();
break;
case CALL_NEW_METHOD:
actions.newMethod();
break;
case NEW_OBJECT:
actions.newObject();
break;
case SET_MEMBER:
actions.setMember();
break;
case GET_TARGET_PATH:
actions.getTargetPath();
break;
case WITH:
parseWith(in);
break;
case DUPLICATE:
actions.duplicate();
break;
case RETURN:
actions.returnValue();
break;
case SWAP:
actions.swap();
break;
case REGISTER:
actions.storeInRegister(in.readUI8());
break;
case MODULO:
actions.modulo();
break;
case TYPEOF:
actions.typeOf();
break;
case TYPED_ADD:
actions.typedAdd();
break;
case TYPED_LESS_THAN:
actions.typedLessThan();
break;
case CONVERT_TO_NUMBER:
actions.convertToNumber();
break;
case CONVERT_TO_STRING:
actions.convertToString();
break;
case INCREMENT:
actions.increment();
break;
case DECREMENT:
actions.decrement();
break;
case BIT_AND:
actions.bitAnd();
break;
case BIT_OR:
actions.bitOr();
break;
case BIT_XOR:
actions.bitXor();
break;
case SHIFT_LEFT:
actions.shiftLeft();
break;
case SHIFT_RIGHT:
actions.shiftRight();
break;
case SHIFT_UNSIGNED:
actions.shiftRightUnsigned();
break;
default:
actions.unknown(code, data);
break;
}
}
}
/**
* Description of the Method
*
*@param in Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void parseDefineFunction(InStream in) throws IOException {
String name = in.readString();
int paramCount = in.readUI16();
String[] params = new String[paramCount];
for (int i = 0; i < params.length; i++) {
params[i] = in.readString();
}
//int codesize = in.readUI16();
//System.out.println( "codesize=" + codesize ); System.out.flush();
actions.startFunction(name, params);
blockDepth++;
}
/**
* Description of the Method
*
*@param in Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void parseWith(InStream in) throws IOException {
// int codesize = in.readUI16();
actions.startWith();
blockDepth++;
}
/**
* Description of the Method
*
*@param in Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void parseLookupTable(InStream in) throws IOException {
String[] strings = new String[in.readUI16()];
for (int i = 0; i < strings.length; i++) {
strings[i] = in.readString();
}
actions.lookupTable(strings);
}
/**
* Description of the Method
*
*@param flags Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void parseGetURL2(int flags) throws IOException {
int sendVars = flags & 0x03;
int mode = 0;
switch (flags & 0xF0) {
case 0x40:
mode = SWFActions.GET_URL_MODE_LOAD_MOVIE_INTO_SPRITE;
break;
case 0x80:
mode = SWFActions.GET_URL_MODE_LOAD_VARS_INTO_LEVEL;
break;
case 0xC0:
mode = SWFActions.GET_URL_MODE_LOAD_VARS_INTO_SPRITE;
break;
default:
mode = SWFActions.GET_URL_MODE_LOAD_MOVIE_INTO_LEVEL;
break;
}
actions.getURL(sendVars, mode);
}
/**
* Description of the Method
*
*@param length Description of the Parameter
*@param in Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void parsePush(int length, InStream in) throws IOException {
while (in.getBytesRead() < length) {
int pushType = in.readUI8();
switch (pushType) {
case PUSHTYPE_STRING:
actions.push(in.readString());
break;
case PUSHTYPE_FLOAT:
actions.push(in.readFloat());
break;
case PUSHTYPE_NULL:
actions.pushNull();
break;
case PUSHTYPE_03:
break;
case PUSHTYPE_REGISTER:
actions.pushRegister(in.readUI8());
break;
case PUSHTYPE_BOOLEAN:
actions.push((in.readUI8() != 0) ? true : false);
break;
case PUSHTYPE_DOUBLE:
actions.push(in.readDouble());
break;
case PUSHTYPE_INTEGER:
actions.push(in.readSI32());
break;
case PUSHTYPE_LOOKUP:
actions.lookup(in.readUI8());
break;
default:
}
}
}
/**
* Description of the Class
*
*@author unknown
*@created 15 de Setembro de 2002
*/
protected static class ActionRecord {
/**
* Description of the Field
*/
public int offset;
//byte offset from start of the action array
/**
* Description of the Field
*/
public int code;
public String label;
public String jumpLabel;
public byte[] data;
public int blockDepth = 0;
/**
* Constructor for the ActionRecord object
*
*@param offset Description of the Parameter
*@param code Description of the Parameter
*@param data Description of the Parameter
*/
protected ActionRecord(int offset, int code, byte[] data) {
this.offset = offset;
this.code = code;
this.data = data;
}
}
/**
* First Pass to determine action offsets and jumps
*
*@param bytes Description of the Parameter
*@return Description of the Return Value
*@exception IOException Description of the Exception
*/
protected List createRecords(byte[] bytes) throws IOException {
return createRecords(new InStream(bytes));
}
/**
* First Pass to determine action offsets and jumps
*
*@param in Description of the Parameter
*@return Description of the Return Value
*@exception IOException Description of the Exception
*/
protected List createRecords(InStream in) throws IOException {
List records = new ArrayList();
List<ActionRecord> jumpers = new ArrayList();
List<Integer> skippers = new ArrayList();
HashMap offsetTable = new HashMap();
Stack blockSizes = new Stack();
int labelIndex = 0;
while (true) {
int offset = (int) in.getBytesRead();
//System.out.println( "read=" + offset ); System.out.flush();
int code = in.readUI8();
int dataLength = (code >= 0x80) ? in.readUI16() : 0;
byte[] data = (dataLength > 0) ? in.read(dataLength) : null;
//System.out.println( "size=" + dataLength ); System.out.flush();
ActionRecord rec = new ActionRecord(offset, code, data);
records.add(rec);
offsetTable.put(new Integer(offset), rec);
if (!blockSizes.isEmpty()) {
int depth = blockSizes.size();
rec.blockDepth = depth;
int blockDecrement = (dataLength > 0) ? (dataLength + 3) : 1;
//--subtract the size of this action from all the block sizes
// in the block stack
for (int i = depth - 1; i >= 0; i--) {
int[] blockSize = (int[]) blockSizes.elementAt(i);
int size = blockSize[0];
size -= blockDecrement;
//--reached end of block ?
if (size <= 0) {
blockSizes.pop();
} else {
blockSize[0] = size;
}
}
}
if (code == 0) {
break;
}
//end of actions
else if (code == DEFINE_FUNCTION) {
InStream in2 = new InStream(rec.data);
in2.readString();
int params = in2.readUI16();
for (int i = 0; i < params; i++) {
in2.readString();
}
int blockSize = in2.readUI16();
blockSizes.push(new int[]{blockSize});
} else if (code == WITH) {
InStream in2 = new InStream(rec.data);
int blockSize = in2.readUI16();
blockSizes.push(new int[]{blockSize});
} else if (code == WAIT_FOR_FRAME || code == WAIT_FOR_FRAME_2) {
skippers.add(new Integer(records.size() - 1));
} else if (code == IF || code == JUMP) {
jumpers.add(rec);
}
}
//--Tie up the jumpers with the offsets
for (ActionRecord rec : jumpers) {
InStream in2 = new InStream(rec.data);
int jumpOffset = in2.readSI16();
int offset = rec.offset + 5;
int absoluteOffset = offset + jumpOffset;
ActionRecord target =
(ActionRecord) offsetTable.get(new Integer(absoluteOffset));
if (target != null) {
if (target.label == null) {
target.label = rec.jumpLabel = "label" + (labelIndex++);
} else {
rec.jumpLabel = target.label;
}
}
}
//--Tie up the skippers with labels
for (Integer idx : skippers) {
ActionRecord rec = (ActionRecord) records.get(idx);
InStream in2 = new InStream(rec.data);
if (rec.code == WAIT_FOR_FRAME) {
in2.readUI16();
}
//skip frame number
int skip = in2.readUI8();
int skipIndex = idx + skip + 1;
if (skipIndex < records.size()) {
ActionRecord target = (ActionRecord) records.get(skipIndex);
if (target.label == null) {
target.label = rec.jumpLabel = "label" + (labelIndex++);
} else {
rec.jumpLabel = target.label;
}
}
}
return records;
}
}
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