[unix-history] / usr / src / lib / libc / stdlib / atoi.c

/* @(#)atoi.c	4.2 (Berkeley) 1/11/81 */
atoi(p)
register char *p;
{
	register int n;
	register int f;

	n = 0;
	f = 0;
	for(;;p++) {
		switch(*p) {
		case ' ':
		case '\t':
			continue;
		case '-':
			f++;
		case '+':
			p++;
		}
		break;
	}
	while(*p >= '0' && *p <= '9')
		n = n*10 + *p++ - '0';
	return(f? -n: n);
}
Commit	Line	Data
b58afb27 BJ	1	/* @(#)atoi.c 4.2 (Berkeley) 1/11/81 */
	2	atoi(p)
	3	register char *p;
47eef4bc	4	{
b58afb27 BJ	5	register int n;
b58afb27 BJ	6	register int f;
47eef4bc	7
47eef4bc BJ	8	n = 0;
47eef4bc BJ	9	f = 0;
b58afb27 BJ	10	for(;;p++) {
	11	switch(*p) {
	12	case ' ':
	13	case '\t':
	14	continue;
	15	case '-':
	16	f++;
	17	case '+':
	18	p++;
	19	}
	20	break;
47eef4bc BJ	21	}
	22	while(p >= '0' && p <= '9')
	23	n = n10 + p++ - '0';
b58afb27	24	return(f? -n: n);
47eef4bc	25	}