Convert this pseudocode please?

[Ran_TH]

Dines just give me this pseudocode http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Main=14347&Number=1020 03#Post102003 :

//Find out how many tables there are in the file.
  Set Pointer to '4' 
  "Number of tables" = Get Unsigned Short

//Move to the list of contents
  Set Pointer to '12'

//Scan each line in the list of contents
//trying to find the 'Names Table'
LOOP 'Number of tables' times
 {
   "Table ID" = Get ASCII String, 4 bytes long

   Advance Pointer by '8'
   "Table Location" = Get Unsigned Long

   Advance Pointer by '4'
   "Table Length" = Get Unsigned Long

   Advance Pointer by '4'

   IF ("Table ID" == "name")
   { Then: Stop loop } //Once the Name Table has been found, stop the search loop.
 }


//Read the Name Table
  Set Pointer to 'Table Location'
  Advance Pointer by '2'
  "Number of Strings" = Get Unsigned Short
  Advance Pointer by '2'
  "Offset to String Def" = Get Unisgned Short
  Advance Pointer by '4'

LOOP 'Number of Strings' times
 {
   Advance Pointer by '6'
   "String Type" = Get Unsigned Short
   Advance Pointer by '2'
   "String Length" = Get Unsigned Short
   Advance Pointer by '2'
   "String Offset" = Get Unsigned Short

   IF ("String Type" == '1')
   { Then: Stop loop } //Once the name string is found, stop the search loop.
 }

//Read the name
  Set Pointer to 'Offset to String Def'
  Advance Pointer by 'String Offset'
  "Font Name" = Get ASCII String, 'String Length' bytes long

RETURN "Font Name"

This is for building an extension that reads a font's name. Let's say for example I have a font file named comic.ttf and I want MMF2 to return the real font name, Comic Sans MS.
Could someone convert the pseudocode to an extension? Thanks in advance.

[SEELE]

This is pretty simple with the current extensions...

I would suggest using the binary array.

[Ran_TH]

Oh, so the binary object is the solution
So can you/someone give me an example?

[MechatheSlag]

An extension would be neat, though.

[Looki]

Hey, I tried to put this into a mfa, but failed:
Binary object can't get unsigned data. Signed only. (e.g. "get byte" returns something between -128 and 127, not 0 - 255)
Binary array supports this, but it crashes for me when i load a ttf file and get some data.

[TwiTerror]

Solution = add 128 to the signed byte.
To place unsigned data you would likewise subtract 128 before saving.

[Looki]

You're the second person who told me that.
Problem is: I use shorts and longs. If i add 2147483647(max of signed long), the values surprisingly are something like 1.04234+e0016... weird.

[Dines]

yeah, you have to express it with expressions, although it's a lifetime ago since I last made an app that could do it.

I'll see if I can come up with somert.

[Dines]

Right, it's nearly done, I'm just having to build my own de-unicoder (font names are stored internally in unicode).

To convert a signed value into unsigned, do this:


(value + 256 pow A) mod (256 pow A)

...where 'A' is the number of bytes used.

SO...

Signed Bytes
(value + 256) mod 256

Signed Shorts (2 bytes)
(value + 256 pow 2) mod (256 pow 2)

Signed Longs (4 bytes)
(value + 256 pow 4) mod (256 pow 4)


Hope that helps


EDIT:

DUN DUN DUN!!
http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=106181#Post1061 81