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 #include "lint.h" 31 #include <ctype.h> 32 #include <sys/types.h> 33 #include <stdlib.h> 34 35 #define ATOLL 36 37 #if defined ATOI 38 typedef int TYPE; 39 #define NAME atoi 40 #elif defined ATOL 41 typedef long TYPE; 42 #define NAME atol 43 #else 44 typedef longlong_t TYPE; 45 #define NAME atoll 46 #endif 47 48 TYPE 49 NAME(const char *p) 50 { 51 TYPE n; 52 int c, neg = 0; 53 unsigned char *up = (unsigned char *)p; 54 55 if (!isdigit(c = *up)) { 56 while (isspace(c)) 57 c = *++up; 58 switch (c) { 59 case '-': 60 neg++; 61 /* FALLTHROUGH */ 62 case '+': 63 c = *++up; 64 } 65 if (!isdigit(c)) 66 return (0); 67 } 68 for (n = '0' - c; isdigit(c = *++up); ) { 69 n *= 10; /* two steps to avoid unnecessary overflow */ 70 n += '0' - c; /* accum neg to avoid surprises at MAX */ 71 } 72 return (neg ? n : -n); 73 } 74