Path: chuka.playstation.co.uk!news
From: James Russell <James_Russell@scee.sony.co.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: urgent help required
Date: Wed, 31 Mar 1999 10:09:20 +0100
Organization: Sony Computer Entertainment Europe
Lines: 49
Message-ID: <3701E640.CBC21474@scee.sony.co.uk>
References: <3702c554.12329198@news.playstation.co.uk> <3700A393.CDC973F6@scee.sony.co.uk> <37042895.8289675@news.playstation.co.uk>
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Righto:

Say you've got the binary file "Bananas.tmd". You want to reference this in your program as
"fruit_TMD".

Then run  "raw2src bananas.tmd bananas.c fruit_TMD". This converts it to a C file with a big char
array containing all the bytes of the file. Now the important phrase here is 'char array'. The array
is defined as:

char fruit_TMD[] = { 0x12, 0x34, ... };

This means fruit_TMD is actually a of type (char*). If you're using it in functions which want the
address of fruit_TMD, then they usually require it as a unsigned long* (u_long *). So you have to
cast it first.

EG:

void MyInitTMDs() {
	u_long *fruit = (u_long *)fruit_TMD;
	...
	GS_LinkObject4(fruit + 1, objectbase, somethingelse);
	...
}

That'll get rid of the "incompatible pointer type" errors.

Secondly, unless you "#include" the bananas.c file (bad idea), the above function isn't going to
know that fruit_TMD is a char* at all. So you have to tell it explicitly that there is an external
object file containing a reference called fruit_TMD, and that fruit_TMD is a char*. So somewhere
before the function defined above, you'd put the line:

extern char fruit_TMD[];

You should be running:

gcc -c bananas.c -o bananas.o

and NOT #includ'ing the bananas.c in multiple C files. If you were, that would explain the multiple
references thing, because you'd be defining the array in many different object files.

Cheers,

James

-- 
== James_Russell@scee.sony.co.uk        ph: +44 (171) 447-1626  -  fax: 390 4324
== Tools and Middleware Licensing Manager  -  Sony Computer Entertainment Europe

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