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Exact match question

 
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Old 10-12-2014
I have looked at this thread (as you requested in PM) and I can't figure out what it is that you're trying to do. It appears that other people reading the thread are having the same problem.

You say you want an exact match, but when code is given to you that performs exact matches, you sometimes want partial matches. And if there are several partial matches we are supposed to magically guess which partial matches are supposed to be added in and which are to be ignored.

Until you can provide a clear explanation of what the code you want is supposed to do, there is little chance that you can write code that does what you want.
 
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LEARN ABOUT MOJAVE

fixadd

fixadd(3alleg4) 						  Allegro manual						   fixadd(3alleg4)

NAME

       fixadd - Safe function to add fixed point numbers clamping overflow. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       fixed fixadd(fixed x, fixed y);

DESCRIPTION

       Although  fixed	point  numbers can be added with the normal '+' integer operator, that doesn't provide any protection against overflow. If
       overflow is a problem, you should use this function instead. It is slower than using integer operators, but if an overflow occurs  it  will
       set `errno' and clamp the result, rather than just letting it wrap. Example:

	  fixed result;
	  /* This will put 5035 into `result'. */
	  result = fixadd(itofix(5000), itofix(35));
	  /* Sets `errno' and puts -32768 into `result'. */
	  result = fixadd(itofix(-31000), itofix(-3000));
	  ASSERT(!errno); /* This will fail. */

RETURN VALUE

       Returns the clamped result of adding `x' to `y', setting `errno' to ERANGE if there was an overflow.

SEE ALSO

       fixsub(3alleg4), fixmul(3alleg4), fixdiv(3alleg4)

Allegro 							   version 4.4.2						   fixadd(3alleg4)