**NAME**

**ggidev-inc_3**, **ggidev-dec_3**, **ggidev-negate_3**, **ggidev-abs_3** - Unary
arithmetic triple-int operations

**SYNOPSIS**

#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]);

**DESCRIPTION**

**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 */

**SEE ALSO**

ggidev-triple-int(7), ggidev-assign_int_3(3)