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 #include <ctype.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <wchar.h> 42 #include <wctype.h> 43 #include "xlocale_private.h" 44 45 /* 46 * Convert a wide character string to an unsigned long integer. 47 */ 48 unsigned long 49 wcstoul_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 50 int base, locale_t locale) 51 { 52 const wchar_t *s; 53 unsigned long acc; 54 wchar_t c; 55 unsigned long cutoff; 56 int neg, any, cutlim; 57 FIX_LOCALE(locale); 58 59 /* 60 * See strtol for comments as to the logic used. 61 */ 62 s = nptr; 63 do { 64 c = *s++; 65 } while (iswspace_l(c, locale)); 66 if (c == L'-') { 67 neg = 1; 68 c = *s++; 69 } else { 70 neg = 0; 71 if (c == L'+') 72 c = *s++; 73 } 74 if ((base == 0 || base == 16) && 75 c == L'0' && (*s == L'x' || *s == L'X') && 76 ((s[1] >= L'0' && s[1] <= L'9') || 77 (s[1] >= L'A' && s[1] <= L'F') || 78 (s[1] >= L'a' && s[1] <= L'f'))) { 79 c = s[1]; 80 s += 2; 81 base = 16; 82 } 83 if ((base == 0 || base == 2) && 84 c == L'0' && (*s == L'b' || *s == L'B') && 85 (s[1] >= L'0' && s[1] <= L'1')) { 86 c = s[1]; 87 s += 2; 88 base = 2; 89 } 90 if (base == 0) 91 base = c == L'0' ? 8 : 10; 92 acc = any = 0; 93 if (base < 2 || base > 36) 94 goto noconv; 95 96 cutoff = ULONG_MAX / base; 97 cutlim = ULONG_MAX % base; 98 for ( ; ; c = *s++) { 99 #ifdef notyet 100 if (iswdigit_l(c, locale)) 101 c = digittoint_l(c, locale); 102 else 103 #endif 104 if (c >= L'0' && c <= L'9') 105 c -= L'0'; 106 else if (c >= L'A' && c <= L'Z') 107 c -= L'A' - 10; 108 else if (c >= L'a' && c <= L'z') 109 c -= L'a' - 10; 110 else 111 break; 112 if (c >= base) 113 break; 114 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 115 any = -1; 116 else { 117 any = 1; 118 acc *= base; 119 acc += c; 120 } 121 } 122 if (any < 0) { 123 acc = ULONG_MAX; 124 errno = ERANGE; 125 } else if (!any) { 126 noconv: 127 errno = EINVAL; 128 } else if (neg) 129 acc = -acc; 130 if (endptr != NULL) 131 *endptr = (wchar_t *)(any ? s - 1 : nptr); 132 return (acc); 133 } 134 unsigned long 135 wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 136 { 137 return wcstoul_l(nptr, endptr, base, __get_locale()); 138 } 139