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 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <ctype.h> 41 #include <errno.h> 42 #include <limits.h> 43 #include <wchar.h> 44 #include <wctype.h> 45 #include "xlocale_private.h" 46 47 /* 48 * Convert a wide character string to an unsigned long integer. 49 */ 50 unsigned long 51 wcstoul_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 52 int base, locale_t locale) 53 { 54 const wchar_t *s; 55 unsigned long acc; 56 wchar_t c; 57 unsigned long cutoff; 58 int neg, any, cutlim; 59 FIX_LOCALE(locale); 60 61 /* 62 * See strtol for comments as to the logic used. 63 */ 64 s = nptr; 65 do { 66 c = *s++; 67 } while (iswspace_l(c, locale)); 68 if (c == L'-') { 69 neg = 1; 70 c = *s++; 71 } else { 72 neg = 0; 73 if (c == L'+') 74 c = *s++; 75 } 76 if ((base == 0 || base == 16) && 77 c == L'0' && (*s == L'x' || *s == L'X')) { 78 c = s[1]; 79 s += 2; 80 base = 16; 81 } 82 if (base == 0) 83 base = c == L'0' ? 8 : 10; 84 acc = any = 0; 85 if (base < 2 || base > 36) 86 goto noconv; 87 88 cutoff = ULONG_MAX / base; 89 cutlim = ULONG_MAX % base; 90 for ( ; ; c = *s++) { 91 #ifdef notyet 92 if (iswdigit_l(c, locale)) 93 c = digittoint_l(c, locale); 94 else 95 #endif 96 if (c >= L'0' && c <= L'9') 97 c -= L'0'; 98 else if (c >= L'A' && c <= L'Z') 99 c -= L'A' - 10; 100 else if (c >= L'a' && c <= L'z') 101 c -= L'a' - 10; 102 else 103 break; 104 if (c >= base) 105 break; 106 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 107 any = -1; 108 else { 109 any = 1; 110 acc *= base; 111 acc += c; 112 } 113 } 114 if (any < 0) { 115 acc = ULONG_MAX; 116 errno = ERANGE; 117 } else if (!any) { 118 noconv: 119 errno = EINVAL; 120 } else if (neg) 121 acc = -acc; 122 if (endptr != NULL) 123 *endptr = (wchar_t *)(any ? s - 1 : nptr); 124 return (acc); 125 } 126 unsigned long 127 wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 128 { 129 return wcstoul_l(nptr, endptr, base, __get_locale()); 130 } 131