1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 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 <errno.h> 38 #include <limits.h> 39 #include <stdlib.h> 40 #include <wchar.h> 41 #include <wctype.h> 42 #include "xlocale_private.h" 43 44 /* 45 * Convert a wide character string to a long long integer. 46 */ 47 long long 48 wcstoll_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 49 int base, locale_t locale) 50 { 51 const wchar_t *s; 52 unsigned long long acc; 53 wchar_t c; 54 unsigned long long cutoff; 55 int neg, any, cutlim; 56 FIX_LOCALE(locale); 57 58 /* 59 * See strtoll for comments as to the logic used. 60 */ 61 s = nptr; 62 do { 63 c = *s++; 64 } while (iswspace_l(c, locale)); 65 if (c == L'-') { 66 neg = 1; 67 c = *s++; 68 } else { 69 neg = 0; 70 if (c == L'+') 71 c = *s++; 72 } 73 if ((base == 0 || base == 16) && 74 c == L'0' && (*s == L'x' || *s == L'X') && 75 ((s[1] >= L'0' && s[1] <= L'9') || 76 (s[1] >= L'A' && s[1] <= L'F') || 77 (s[1] >= L'a' && s[1] <= L'f'))) { 78 c = s[1]; 79 s += 2; 80 base = 16; 81 } 82 if ((base == 0 || base == 2) && 83 c == L'0' && (*s == L'b' || *s == L'B') && 84 (s[1] >= L'0' && s[1] <= L'1')) { 85 c = s[1]; 86 s += 2; 87 base = 2; 88 } 89 if (base == 0) 90 base = c == L'0' ? 8 : 10; 91 acc = any = 0; 92 if (base < 2 || base > 36) 93 goto noconv; 94 95 cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX 96 : LLONG_MAX; 97 cutlim = cutoff % base; 98 cutoff /= base; 99 for ( ; ; c = *s++) { 100 #ifdef notyet 101 if (iswdigit_l(c, locale)) 102 c = digittoint_l(c, locale); 103 else 104 #endif 105 if (c >= L'0' && c <= L'9') 106 c -= L'0'; 107 else if (c >= L'A' && c <= L'Z') 108 c -= L'A' - 10; 109 else if (c >= L'a' && c <= L'z') 110 c -= L'a' - 10; 111 else 112 break; 113 if (c >= base) 114 break; 115 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 116 any = -1; 117 else { 118 any = 1; 119 acc *= base; 120 acc += c; 121 } 122 } 123 if (any < 0) { 124 acc = neg ? LLONG_MIN : LLONG_MAX; 125 errno = ERANGE; 126 } else if (!any) { 127 noconv: 128 errno = EINVAL; 129 } else if (neg) 130 acc = -acc; 131 if (endptr != NULL) 132 *endptr = (wchar_t *)(any ? s - 1 : nptr); 133 return (acc); 134 } 135 long long 136 wcstoll(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 137 { 138 return wcstoll_l(nptr, endptr, base, __get_locale()); 139 } 140