1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#if defined(LIBC_SCCS) && !defined(lint) 38static char sccsid[] = "@(#)strtoul.c 8.1 (Berkeley) 6/4/93"; 39#endif /* LIBC_SCCS and not lint */ 40// #include <sys/cdefs.h> 41// __FBSDID("$FreeBSD$"); 42 43#include <limits.h> 44#include <ctype.h> 45#include <errno.h> 46#include <stdlib.h> 47// #include "xlocale_private.h" 48 49/* 50 * Convert a string to an unsigned long integer. 51 * 52 * Assumes that the upper and lower case 53 * alphabets and digits are each contiguous. 54 */ 55unsigned long 56strtoul_l(const char * __restrict nptr, char ** __restrict endptr, int base) 57{ 58 const char *s; 59 unsigned long acc; 60 char c; 61 unsigned long cutoff; 62 int neg, any, cutlim; 63 // FIX_LOCALE(locale); 64 65 /* 66 * See strtol for comments as to the logic used. 67 */ 68 s = nptr; 69 do { 70 c = *s++; 71 } while (isspace((unsigned char)c)); 72 if (c == '-') { 73 neg = 1; 74 c = *s++; 75 } else { 76 neg = 0; 77 if (c == '+') { 78 c = *s++; 79 } 80 } 81 if ((base == 0 || base == 16) && 82 c == '0' && (*s == 'x' || *s == 'X') && 83 ((s[1] >= '0' && s[1] <= '9') || 84 (s[1] >= 'A' && s[1] <= 'F') || 85 (s[1] >= 'a' && s[1] <= 'f'))) { 86 c = s[1]; 87 s += 2; 88 base = 16; 89 } 90 if (base == 0) { 91 base = c == '0' ? 8 : 10; 92 } 93 acc = any = 0; 94 if (base < 2 || base > 36) { 95 goto noconv; 96 } 97 98 cutoff = ULONG_MAX / base; 99 cutlim = ULONG_MAX % base; 100 for (;; c = *s++) { 101 if (c >= '0' && c <= '9') { 102 c -= '0'; 103 } else if (c >= 'A' && c <= 'Z') { 104 c -= 'A' - 10; 105 } else if (c >= 'a' && c <= 'z') { 106 c -= 'a' - 10; 107 } else { 108 break; 109 } 110 if (c >= base) { 111 break; 112 } 113 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) { 114 any = -1; 115 } else { 116 any = 1; 117 acc *= base; 118 acc += c; 119 } 120 } 121 if (any < 0) { 122 acc = ULONG_MAX; 123 errno = ERANGE; 124 } else if (!any) { 125noconv: 126 errno = EINVAL; 127 } else if (neg) { 128 acc = -acc; 129 } 130 if (endptr != NULL) { 131 *endptr = (char *)(any ? s - 1 : nptr); 132 } 133 return (acc); 134} 135unsigned long 136strtoul(const char * __restrict nptr, char ** __restrict endptr, int base) 137{ 138 return strtoul_l(nptr, endptr, base); 139} 140