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

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)atoi.c	5.2 (Berkeley) %G%";
#endif LIBC_SCCS and not lint

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
2ce81398 DS	1	#if defined(LIBC_SCCS) && !defined(lint)
	2	static char sccsid[] = "@(#)atoi.c 5.2 (Berkeley) %G%";
	3	#endif LIBC_SCCS and not lint
b8f253e8	4
b58afb27 BJ	5	atoi(p)
b58afb27 BJ	6	register char *p;
47eef4bc	7	{
b58afb27 BJ	8	register int n;
b58afb27 BJ	9	register int f;
47eef4bc	10
47eef4bc BJ	11	n = 0;
47eef4bc BJ	12	f = 0;
b58afb27 BJ	13	for(;;p++) {
	14	switch(*p) {
	15	case ' ':
	16	case '\t':
	17	continue;
	18	case '-':
	19	f++;
	20	case '+':
	21	p++;
	22	}
	23	break;
47eef4bc BJ	24	}
	25	while(p >= '0' && p <= '9')
	26	n = n10 + p++ - '0';
b58afb27	27	return(f? -n: n);
47eef4bc	28	}