ggidev-inc_33

Usage

#include <ggi/internal/triple-int.h>
unsigned *inc_3(unsigned x[3]);
unsigned *dec_3(unsigned x[3]);
unsigned *negate_3(unsigned x[3]);
unsigned *abs_3(unsigned x[3]);

Overview

inc_3 increments x by one. Equivalent to ++x.

dec_3 decrements x by one. Equivalent to --x.

negate_3 negates x. Equivalent to x=-x.

abs_3 takes the absolute value of x. Equivalent to x=x<0?-x:x.

Return value

inc_3, dec_3, negate_3 and abs_3 all return a pointer to x which has been updated in place.

Examples

Some unary arithmetic operations on triple-ints:

unsigned x[3];
assign_int_3(x, 44);
negate_3(x);  /* x is now -44 */
inc_3(x);     /* x is now -43 */
abs_3(x);     /* x is now 43 */
dec_3(x);     /* x is now 42 */