1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)strtouq.c 8.1 (Berkeley) 6/4/93 35 * $FreeBSD: head/lib/libc/locale/wcstoull.c 227753 2011-11-20 14:45:42Z theraven $ 36 */ 37 38 39 #include <errno.h> 40 #include <limits.h> 41 #include <stdlib.h> 42 #include <wchar.h> 43 #include <wctype.h> 44 #include "xlocale_private.h" 45 46 /* 47 * Convert a wide character string to an unsigned long long integer. 48 */ 49 unsigned long long 50 wcstoull_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 51 int base, locale_t locale) 52 { 53 const wchar_t *s; 54 unsigned long long acc; 55 wchar_t c; 56 unsigned long long cutoff; 57 int neg, any, cutlim; 58 FIX_LOCALE(locale); 59 60 /* 61 * See strtoull for comments as to the logic used. 62 */ 63 s = nptr; 64 do { 65 c = *s++; 66 } while (iswspace_l(c, locale)); 67 if (c == L'-') { 68 neg = 1; 69 c = *s++; 70 } else { 71 neg = 0; 72 if (c == L'+') 73 c = *s++; 74 } 75 if ((base == 0 || base == 16) && 76 c == L'0' && (*s == L'x' || *s == L'X')) { 77 c = s[1]; 78 s += 2; 79 base = 16; 80 } 81 if (base == 0) 82 base = c == L'0' ? 8 : 10; 83 acc = any = 0; 84 if (base < 2 || base > 36) 85 goto noconv; 86 87 cutoff = ULLONG_MAX / base; 88 cutlim = ULLONG_MAX % base; 89 for ( ; ; c = *s++) { 90 #ifdef notyet 91 if (iswdigit_l(c, locale)) 92 c = digittoint_l(c, locale); 93 else 94 #endif 95 if (c >= L'0' && c <= L'9') 96 c -= L'0'; 97 else if (c >= L'A' && c <= L'Z') 98 c -= L'A' - 10; 99 else if (c >= L'a' && c <= L'z') 100 c -= L'a' - 10; 101 else 102 break; 103 if (c >= base) 104 break; 105 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 106 any = -1; 107 else { 108 any = 1; 109 acc *= base; 110 acc += c; 111 } 112 } 113 if (any < 0) { 114 acc = ULLONG_MAX; 115 errno = ERANGE; 116 } else if (!any) { 117 noconv: 118 errno = EINVAL; 119 } else if (neg) 120 acc = -acc; 121 if (endptr != NULL) 122 *endptr = (wchar_t *)(any ? s - 1 : nptr); 123 return (acc); 124 } 125 unsigned long long 126 wcstoull(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 127 int base) 128 { 129 return wcstoull_l(nptr, endptr, base, __get_locale()); 130 } 131