Flash ActionScript > C# - BlitzCoder.net

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Socoder -> C/C++/C#/Other -> Flash ActionScript > C#
Tue, 02 Jun 2009, 09:52
Afr0	I need some help with converting code written in ActionScript for Adobe Flash to C#. Here's the class I'm trying to convert: package com.frankula.parsers { import flash.utils.Proxy; import flash.utils.flash_proxy; public final class IFFChunkID extends Proxy { private static var _instance:IFFChunkID; private static var _converted:Object; private static var _returnType:String; // rsmp : the resource map that tells where everything else is public static function get rsmp():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['rsmp']; } public static function get BCON():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['BCON']; } public static function get TRCN():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['TRCN']; } public static function get BHAV():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['BHAV']; } public static function get OBJf():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['OBJf']; } public static function get objt():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['objt']; } public static function get SLOT():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['SLOT']; } public static function get TREE():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['TREE']; } public static function get TRPR():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['TRPR']; } // OBJD : data about the object (cost, category, etc) public static function get OBJD():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['OBJD']; } // CTSS : Catalog text strings in one or more languages public static function get CTSS():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['CTSS']; } // DGRP : draw group resources that define where sprite images go public static function get DGRP():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['DGRP']; } // SPR2 : sprite image resources public static function get SPR2():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['SPR2']; } // SPRn : more sprite image resources public static function get SPRn():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['SPR#']; } // PALT : palettes used by the sprite image resources public static function get PALT():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['PALT']; } // BMP_ : Windows BMP format bitmaps; used in catalogs and thought balloons public static function get BMP():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['BMP_']; } // FBMP : Windows BMP format bitmaps; used in some .flr floor files public static function get FBMP():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['FBMP']; } // STRn : text strings (animation names, alerts. etc.) in one or more languages public static function get STRn():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['STR#']; } // TTAs : pie menutext strings in one or more languages public static function get TTAs():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['TTAs']; } // TTAB : binary menu data public static function get TTAB():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['TTAB']; } // uChr : text strings used in .FAM files public static function get uChr():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['uChr']; } // CARR : Carreer data (sim job info) public static function get CARR():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['CARR']; } public static function encode(str:String):* { return IFFChunkID._instance[str]; } public static function decode(val:uint):* { var hex:String = val.toString(16); return String.fromCharCode(((val & 0xff000000) >> 24), ((val & 0x00ff0000) >> 16), ((val & 0x0000ff00) >> 8), (val & 0x000000ff)); } public static function invert2(val:uint):uint { return ((val >> 8) & 0xff)+((val << 8) & 0xff00); } public static function invert4(val:uint):uint { return ((val & 0xff000000) >> 24) \| ((val & 0x00ff0000) >> 8) \| ((val & 0x0000ff00) << 8) \| ((val & 0x000000ff) << 24); } public static function set returnType(type:String):void { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; IFFChunkID._returnType = type; } public function IFFChunkID(singletonEnforcer:SingletonEnforcer) { } private static function getInstance():IFFChunkID { if (IFFChunkID._instance == null) { IFFChunkID._instance = new IFFChunkID(new SingletonEnforcer()); IFFChunkID._converted = new Object(); IFFChunkID._returnType = IFFChunkReturnType.UINT; } return IFFChunkID._instance; } flash_proxy override function getProperty(name:): { if (name != null) { if (name.toString().length == 4) { if (IFFChunkID._converted[name] == null) { IFFChunkID._converted[name] = toChunkID(name); } if (IFFChunkID._returnType == IFFChunkReturnType.UINT) { return IFFChunkID._converted[name]; } else if (IFFChunkID._returnType == IFFChunkReturnType.HEX) { return IFFChunkID._converted[name].toString(16); } } else { throw new Error(name+" is not a valid chunk ID"); } } } private function toChunkID(id:String):uint { var a:int = id.charCodeAt(0); var b:int = id.charCodeAt(1); var c:int = id.charCodeAt(2); var d:int = id.charCodeAt(3); return ((a << 24) \| (b << 16) \| (c << 8) \| d); } } } internal final class SingletonEnforcer {} --v Can someone please help me figure out exactly how this class works? I know it's a singleton, but I don't really know much more than that. Here is an example of how this class is used: private function parseData(byteArray:ByteArray = null):void { var len:int = Math.floor(byteArray.bytesAvailable)-4; IFFChunkID["returnType"] = IFFChunkReturnType.UINT; byteArray.position = 0; for (var i:int=0; i<len; i++) { byteArray.position = i; var nVal:uint = byteArray.readUnsignedInt(); if ( (nVal == IFFChunkID.rsmp) \|\| (nVal == IFFChunkID.BCON) \|\| (nVal == IFFChunkID.BHAV) \|\| (nVal == IFFChunkID.BMP) \|\| (nVal == IFFChunkID.CTSS) \|\| (nVal == IFFChunkID.DGRP) \|\| (nVal == IFFChunkID.FBMP) \|\| (nVal == IFFChunkID.OBJD) \|\| (nVal == IFFChunkID.OBJf) \|\| (nVal == IFFChunkID.objt) \|\| (nVal == IFFChunkID.PALT) \|\| (nVal == IFFChunkID.SLOT) \|\| (nVal == IFFChunkID.SPR2) \|\| (nVal == IFFChunkID.SPRn) \|\| (nVal == IFFChunkID.TRCN) \|\| (nVal == IFFChunkID.TREE) \|\| (nVal == IFFChunkID.TRPR) \|\| (nVal == IFFChunkID.TTAB) \|\| (nVal == IFFChunkID.TTAs) \|\| (nVal == IFFChunkID.uChr) \|\| (nVal == IFFChunkID.CARR) ) { var chunk:IFFChunk = toChunk(nVal, byteArray); i += chunk.length; _mainChunks.push(chunk); } } //trace("rscs : "+_mainChunks.length); parseObjects(); } --v Here's what I've converted so far: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace IffLib.Parsers { public class IffChunkID { private static readonly IffChunkID m_Instance = new IffChunkID(); private static string m_ReturnType; public string ReturnType { set { IffChunkID.m_ReturnType = value; } } // Explicit static constructor to tell C# compiler // not to mark type as beforefieldinit static IffChunkID() { } IffChunkID() { } public static IffChunkID Instance { get { m_ReturnType = IffChunkReturnType.UINT; return m_Instance; } } public static string Decode (uint Value) { string Hex = Value.ToString("X"); return new string(new char[] { (char)((Value & 0xff000000) >> 24), (char)((Value & 0x00ff0000) >> 16), (char)((Value & 0x0000ff00) >> 8), (char)(Value & 0x000000ff) }); } public static uint Invert2(uint Value) { return ((Value >> 8) & 0xff) + ((Value << 8) & 0xff00); } public static uint Invert4(uint Value) { return ((Value & 0xff000000) >> 24) \| ((Value & 0x00ff0000) >> 8) \| ((Value & 0x0000ff00) << 8) \| ((Value & 0x000000ff) << 24); } private static uint ToChunkID(string ID) { int A = ID[0]; int B = ID[1]; int C = ID[2]; int D = ID[3]; return (uint)((A << 24) \| (B << 16) \| (C << 8) \| D); } } } --v One theory I have is that _converted is some kind of array containing elenents of... some kind of type. What kind of type, I'm not sure. :\| If this theory is correct, the above example would be the ActionScript way of implementing [Array]Indexers like in C#. Bah... I'm confused!! Someone please help!! IffChunkReturnType simply looks like this: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace IffLib.Parsers { internal class IffChunkReturnType { public static string UINT = "uint"; public static string HEX = "hex"; } } --v -=-=- Afr0 Games Project Dollhouse on Github - Please fork!
Wed, 03 Jun 2009, 14:40
Scherererer	I think you're right about it converting data formats. I'm guessing all of these things are some kinds of commands passed in as a byte array, and then it converts that array into a single unsigned integer, and then compares that to all of the IFFChunkID's possible, and if it is one of those it converts it. I think that the IFFChunkID is acting kind of like an enum? It really looks like a poor implementation to me. It looks to me like the functions like this: // PALT : palettes used by the sprite image resources public static function get PALT():* { (IFFChunkID._instance == null) ? IFFChunkID.getInstance() : null; return IFFChunkID._instance['PALT']; } --v are just supposed to return the fields of _instance from a static context. I think they're some kind of settings that you can make, maybe they're trying to map values to those constants (like PALT) and couldn't do it with actionscript enums, and so they did this bastard practice. Having never used action script before, and not knowing what this api is for exactly, I can't tell much more than that, but this is all my best guess. -=-=- YouTube Twitter Computer Science Series: Logic (pt1) (part 2) (part 3) 2's Complement Mathematics: Basic Differential Calculus
Wed, 10 Jun 2009, 02:20
Afr0	Thanks for your input! I've found alot of sourcecode after doing conciderable research that seems to work alot better than this Flash code. In fact as of today I managed to extract most of the chunks inside an iff file. I'm actually concidering putting up a Wiki on my site (https://www.afr0games.com) where I'll document all the information I have on the various formats from The Sims so other developers can gain from it. -=-=- Afr0 Games Project Dollhouse on Github - Please fork!
Wed, 10 Jun 2009, 15:41
Afr0	And I just did put up a Wiki! Iff format, documented once and for all If anyone has anything at all to contribute to this Wiki, please do so! -=-=- Afr0 Games Project Dollhouse on Github - Please fork!