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Inside Macintosh: Operating System Utilities /

Chapter 3 - Mathematical and Logical Utilities / Mathematical and Logical Utilities Reference

Routines / Multiplying and Dividing Fixed-Point Numbers

FracDiv

You can use the FracDiv function to divide two variables of the same type (Fract, Fixed, or LongInt) or to divide a LongInt or Fixed number by a Fract number.

FUNCTION FracDiv (a, b: Fract): Fract;

a

The first operand, which can be a variable of type Fract or a variable of type Fixed or LongInt.

b

The second operand, which can be a variable of type Fract or a variable of the same type as the variable in parameter a.

DESCRIPTION

The FracDiv function returns the quotient of the numbers specified in the a and b parameters. If the b parameter is in the format of a Fract number, then the a parameter can be in the format of a Fract, a Fixed, or a LongInt number. If the b parameter is in the format of a Fixed or a LongInt number, then the a parameter must be in the same format.

The returned value is in the format of a Fract number if a and b are both Fract numbers, both Fixed numbers, or both LongInt numbers. Otherwise, the returned value is in the same format as the number in the a parameter.

Division by zero results in $8000000 if a is negative, and $7FFFFFFF otherwise; thus the special case 0/0 yields $7FFFFFFF.