utils.h File Reference

Various helper macros. More...

Detailed Description

Various helper macros.

Author

Marian Buschsieweke maria.nosp@m.n.bu.nosp@m.schsi.nosp@m.ewek.nosp@m.e@ovg.nosp@m.u.de

Definition in file utils.h.

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#define	CONCAT(a, b)   a ## b
	Concatenate the tokens a and b.
#define	CONCAT3(a, b, c)   a ## b ## c
	Concatenate the tokens a , b , and c.
#define	CONCAT4(a, b, c, d)   a ## b ## c ## d
	Concatenate the tokens a , b , c , and d.
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))
	Get the maximum of the two parameters.
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
	Get the minimum of the two parameters.
#define	ABS(x)   ((x) > 0 ? (x) : -(x))
	Returns the absolute value of x.
#define	LIMIT(val, low, high)   ((val < low) ? low : (val > high) ? high : val)
	Limit a value to an inclusive range.

Macro Definition Documentation

ABS

#define ABS

(

x

)

((x) > 0 ? (x) : -(x))

Returns the absolute value of x.

Note

This is the trivial implementation that does evaluate the arguments more than once

Definition at line 73 of file utils.h.

CONCAT

#define CONCAT	(		a,
			b
	)		a ## b

Concatenate the tokens a and b.

Definition at line 29 of file utils.h.

CONCAT3

#define CONCAT3	(		a,
			b,
			c
	)		a ## b ## c

Concatenate the tokens a , b , and c.

Definition at line 34 of file utils.h.

CONCAT4

#define CONCAT4	(		a,
			b,
			c,
			d
	)		a ## b ## c ## d

Concatenate the tokens a , b , c , and d.

Definition at line 39 of file utils.h.

LIMIT

#define LIMIT	(		val,
			low,
			high
	)		((val < low) ? low : (val > high) ? high : val)

Limit a value to an inclusive range.

If val is > high, high is returned. If val is < low, low is returned. Otherwise, val is returned.

Note

This macro evaluate its arguments more than once.

Parameters

[in]	val	value to limit
[in]	low	minimum limit
[in]	high	maximum limit

Returns

range limited value

Definition at line 90 of file utils.h.

MAX

#define MAX	(		a,
			b
	)		((a) > (b) ? (a) : (b))

Get the maximum of the two parameters.

Note

This is the trivial implementation that does evaluate the arguments more than once

Definition at line 53 of file utils.h.

MIN

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

Get the minimum of the two parameters.

Note

This is the trivial implementation that does evaluate the arguments more than once

Definition at line 63 of file utils.h.