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 #if 0 38 #if defined(LIBC_SCCS) && !defined(lint) 39 static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93"; 40 #endif /* LIBC_SCCS and not lint */ 41 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoull.c,v 1.18 2002/09/06 11:23:59 tjr Exp "); 42 #endif 43 #include <errno.h> 44 #include <limits.h> 45 #include <stdlib.h> 46 #include <wchar.h> 47 #include <wctype.h> 48 #include "xlocale_private.h" 49 50 /* 51 * Convert a wide character string to an unsigned long long integer. 52 */ 53 unsigned long long 54 wcstoull_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 55 int base, locale_t locale) 56 { 57 const wchar_t *s; 58 unsigned long long acc; 59 wchar_t c; 60 unsigned long long cutoff; 61 int neg, any, cutlim; 62 FIX_LOCALE(locale); 63 64 /* 65 * See strtoull for comments as to the logic used. 66 */ 67 s = nptr; 68 do { 69 c = *s++; 70 } while (iswspace_l(c, locale)); 71 if (c == L'-') { 72 neg = 1; 73 c = *s++; 74 } else { 75 neg = 0; 76 if (c == L'+') 77 c = *s++; 78 } 79 if ((base == 0 || base == 16) && 80 c == L'0' && (*s == L'x' || *s == L'X') && 81 ((s[1] >= L'0' && s[1] <= L'9') || 82 (s[1] >= L'A' && s[1] <= L'F') || 83 (s[1] >= L'a' && s[1] <= L'f'))) { 84 c = s[1]; 85 s += 2; 86 base = 16; 87 } 88 if ((base == 0 || base == 2) && 89 c == L'0' && (*s == L'b' || *s == L'B') && 90 (s[1] >= L'0' && s[1] <= L'1')) { 91 c = s[1]; 92 s += 2; 93 base = 2; 94 } 95 if (base == 0) 96 base = c == L'0' ? 8 : 10; 97 acc = any = 0; 98 if (base < 2 || base > 36) 99 goto noconv; 100 101 cutoff = ULLONG_MAX / base; 102 cutlim = ULLONG_MAX % base; 103 for ( ; ; c = *s++) { 104 #ifdef notyet 105 if (iswdigit_l(c, locale)) 106 c = digittoint_l(c, locale); 107 else 108 #endif 109 if (c >= L'0' && c <= L'9') 110 c -= L'0'; 111 else if (c >= L'A' && c <= L'Z') 112 c -= L'A' - 10; 113 else if (c >= L'a' && c <= L'z') 114 c -= L'a' - 10; 115 else 116 break; 117 if (c >= base) 118 break; 119 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 120 any = -1; 121 else { 122 any = 1; 123 acc *= base; 124 acc += c; 125 } 126 } 127 if (any < 0) { 128 acc = ULLONG_MAX; 129 errno = ERANGE; 130 } else if (!any) { 131 noconv: 132 errno = EINVAL; 133 } else if (neg) 134 acc = -acc; 135 if (endptr != NULL) 136 *endptr = (wchar_t *)(any ? s - 1 : nptr); 137 return (acc); 138 } 139 unsigned long long 140 wcstoull(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 141 int base) 142 { 143 return wcstoull_l(nptr, endptr, base, __get_locale()); 144 } 145