Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!bbn.com!rmitchel
From: rmitchel@bbn.com (Rob Mitchell)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Huh? What's wrong here... (A Simple Think C question)
Message-ID: <63903@bbn.BBN.COM>
Date: 26 Apr 91 20:03:34 GMT
References: <1991Apr14.021934.8840@watdragon.waterloo.edu> <1991Apr14.104649.20585@ida.liu.se>
Sender: news@bbn.com
Lines: 33

>jpmah@dahlia.uwaterloo.ca (John Mah) writes:

>long _get_new_hash_val(some parameters) 
>{
>	long value;
>	...some statements...
>	return value;
>}

>*my_pointer_to_a_long = _get_new_hash_val(some parameters);

	Use prototyping and declare the function in the file/module that its
	being called from.  Problem is the 68000 masks off hiword (look at
	some disassembled code) upon return from function calls defaulting
	to "int" (which is only 16-bits on Mac, not 32-bits like many Unix
	machines).

	IMHO, never use "int" when programming Mac.  Use either "short" or
	"long" (or better, declare typedefs for Int8, UInt8, etc.) which
	helps when porting to other computer systems.

	Good luck!!


	
Rob Mitchell                            Advanced Simulation Division
Unix & Macintosh Engineer               BBN Systems & Technologies
Internet: rmitchel@vax.bbn.com          33 Moulton Street   MS: 8/C
Primary Dwelling:   617-873-4041        Cambridge, MA  02138
Secondary Dwelling: 617-873-4071
FAX:                617-873-4315

These opinions are mine and mine only.  They do not represent BBNs' opinions.