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