#!/bin/awk -f

function trim1(s) {
	gsub(/^[\t ]*|[\t ]*$/, "", s);
	return s
}

function trim2(s) {
	gsub(/^[\t ]+|[\t ]+$/, "", s);
	return s
}

function trim(s) {
	printf("ORIGINAL: [%s]\n", s);
	printf("TRIM1: [%s]\n", trim1(s));
	printf("TRIM2: [%s]\n", trim2(s));
}

BEGIN {
	trim("pff");
	trim(" leading-space");
	trim("trailing-space ");
	trim("\tleading-tab");
	trim("traling-tab\t");
	exit(0);
}