Alhexx' Cy Girls NKP Format Analysis V1.00
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Hello and welcome to another of Alhexx' famous file format
descriptions! ^_^
Well, taking a quick look at my homepage, I recognize that
this is the first released description for around 2 years.
Doh, I've been very lazy the last few years...

Okay, enough of that.
The format we want to take a look at this time is
from the almost unknown PS2 game "Cy Girls" from Konami.
The format is quite simple, altough a bit unusual.

But okay, let's simply start with the structures we need:


Header
------
struct CG_NKP_HEADER
{
	unsigned long	ulMagic;	// 0x1A504B4E
	unsigned long	ulFileSize;
	unsigned long	ulReserved;	// 0
	unsigned long	ulNumFiles;
}; // 16 Bytes


File Entry
----------
struct CG_NKP_FILE
{
	unsigned long	ulFileNameOffset;
	unsigned long	ulFileOffset;
}; // 8 Bytes



I think there's nothing that needs to be explained in the
header.

But let's see the file entry. There is no filename stored in
here, there's just the offset to the filename within this 
archive.
So if you want to have the first file's filename, you will
have to read the first CG_NKP_FILE struct, then seek to
ulFileNameOffset in your archive and there you have your
filename, terminated by a NULL-Char.

Unfortunately, this format only saves offsets, no filesizes
and no filename lengths...


File Structure
--------------
This is the structure of a NKP archive:

 -> CG_NKP_HEADER
 -> CG_NKP_FILE[ CG_NKP_HEADER.ulNumFiles ]
 -> 8 empty Bytes (0x00)
 -> Filenames (seperated by NULL-char)
(-> Padding until address is a multiple of 16)
 -> File Entries

I think this is self-explaining...


Note:
I don't know if every single file has to begin at an offset
that is a multiple of 16, but I suppose yes...


That's enough for today.

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--------------------
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 - Alhexx
01:22 2006-02-22