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 ATOL 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 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