1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include "lint.h"
33#include <ctype.h>
34#include <sys/types.h>
35#include <stdlib.h>
36
37#define	ATOI
38
39#ifdef	ATOI
40typedef int TYPE;
41#define	NAME	atoi
42#else
43typedef long TYPE;
44#define	NAME	atol
45#endif
46
47TYPE
48NAME(const char *p)
49{
50	TYPE n;
51	int c, neg = 0;
52	unsigned char	*up = (unsigned char *)p;
53
54	if (!isdigit(c = *up)) {
55		while (isspace(c))
56			c = *++up;
57		switch (c) {
58		case '-':
59			neg++;
60			/* FALLTHROUGH */
61		case '+':
62			c = *++up;
63		}
64		if (!isdigit(c))
65			return (0);
66	}
67	for (n = '0' - c; isdigit(c = *++up); ) {
68		n *= 10; /* two steps to avoid unnecessary overflow */
69		n += '0' - c; /* accum neg to avoid surprises at MAX */
70	}
71	return (neg ? n : -n);
72}
73