Function str2sint

ut.h:767–796

* Convert a str into signed integer */

 * Convert a str into signed integer
 */
static inline int str2sint(const str* _s, int* _r)
{
	int i;
	int s;

	if (_s==0 || _s->s == 0 || _s->len == 0 || _r == 0)
		return -1;

	*_r = 0;
	s = 1;
	i=0;
	if(_s->s[i]=='-') {
		s=-1;
		i++;
	} else if (_s->s[i]=='+') {
		i++;
	}
	for(; i < _s->len; i++) {
		if ((_s->s[i] >= '0') && (_s->s[i] <= '9')) {
			*_r *= 10;
			*_r += _s->s[i] - '0';
		} else {
			//Preserve sign for partially converted strings
			*_r *= s;
			return -1;
		}
	}
	*_r *= s;
	return 0;
}


/*