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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /* Copyright (c) 1984 AT&T */
23 /* All Rights Reserved */
24
25 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 2.1 */
26
27 /*LINTLIBRARY*/
28 #include <ctype.h>
29
30 #define ATOI
31
32 #ifdef ATOI
33 typedef int TYPE;
34 #define NAME atoi
35 #else
36 typedef long TYPE;
37 #define NAME atol
38 #endif
39
40 TYPE
NAME(p)41 NAME(p)
42 register char *p;
43 {
44 register TYPE n;
45 register int c, neg = 0;
46
47 if (!isdigit(c = *p)) {
48 while (isspace(c))
49 c = *++p;
50 switch (c) {
51 case '-':
52 neg++;
53 case '+': /* fall-through */
54 c = *++p;
55 }
56 if (!isdigit(c))
57 return (0);
58 }
59 for (n = '0' - c; isdigit(c = *++p); ) {
60 n *= 10; /* two steps to avoid unnecessary overflow */
61 n += '0' - c; /* accum neg to avoid surprises at MAX */
62 }
63 return (neg ? n : -n);
64 }
65