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 ATOL 38 39 #ifdef ATOI 40 typedef int TYPE; 41 #define NAME atoi 42 #else 43 typedef long TYPE; 44 #define NAME atol 45 #endif 46 47 TYPE 48 NAME(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