[serializerclass-general] the correct way (I think), test case

[Jamie P <ja...@e-...>]

Hi,

I think I found the correct way to calculate string length for serialising
and deserialising, both the code in the CVS and the code I previously sent
you don't work properly.

In the PHP manual it says Unicode is converted to UTF-8 as follows :


bytes bits representation
1 7 0bbbbbbb
2 11 110bbbbb 10bbbbbb
3 16 1110bbbb 10bbbbbb 10bbbbbb
4 21 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb

It seems that Flash only supports Unicode characters up to 16 bits so we
will have to ignore 4 byte UTF-8. We should probably throw an error if
someone tries to send 4 byte but someone else can work on that one.

Here is the code that I have developed and tested with relevant test cases.

	private function getCStringLength ():Number {
		var colon:Number = this.buffer.indexOf (":", 3); // index of second colon
		var ss:Number = colon+2; // index of start of string
		var len:Number = parseInt (this.buffer.substr (2, colon - 2));
		var i:Number;
		var j:Number = len; //char length of string to be calculated
		var c:Number;
		var cstr = this.buffer;
		for (i = ss; i < (ss + j); i++)
		{
			c=cstr.charCodeAt(i);
			if (c<128) {
				//do nothing
			}else if (c<2048) {
				j = j-1;
			} else {
				j = j-2;
			}
		}
		return j;
	};	// getCStringLength



and used to serialize data :

	private function calcLength(struct:String)
	{
		var c;
		var result=0;
		var l = struct.length;
		for (var i=0; i < l; i++)
		{
			c = (struct.charCodeAt(i));
			if(c<128) {
				result += 1;
			} else if (c<2048) {
				result += 2;
			} else {
				result += 3;
			}
		}
		return result;
	}

This seems to be able to serialize and unserialise all unicode characters
supported by Flash properly and construct / reconstruct arrays and strings
which can be unserialised and serialised by php .

Check out the zip file for my test case here :

http://jamiep.org/mbcs/test.zip

and see it in action here :

http://jamiep.org/mbcs/serialtest.html

ALso you may be interested in the way I found to send data to the server :
override XML.toString(). It seems if you make XML.toString() return a
string and then use XML.sendAndLoad() or XML.send() that exactly the
string you return is sent. If you use the XML constructor then XML
converts & to &amp; but not if you override XML.toString(). Old news maybe?


Jamie