1 /* 2 * Copyright (c) 1990, 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 * 3. 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 * $FreeBSD: head/lib/libc/locale/wcstoul.c 227753 2011-11-20 14:45:42Z theraven $ 35 */ 36 37 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 c = s[1]; 77 s += 2; 78 base = 16; 79 } 80 if (base == 0) 81 base = c == L'0' ? 8 : 10; 82 acc = any = 0; 83 if (base < 2 || base > 36) 84 goto noconv; 85 86 cutoff = ULONG_MAX / base; 87 cutlim = ULONG_MAX % base; 88 for ( ; ; c = *s++) { 89 #ifdef notyet 90 if (iswdigit_l(c, locale)) 91 c = digittoint_l(c, locale); 92 else 93 #endif 94 if (c >= L'0' && c <= L'9') 95 c -= L'0'; 96 else if (c >= L'A' && c <= L'Z') 97 c -= L'A' - 10; 98 else if (c >= L'a' && c <= L'z') 99 c -= L'a' - 10; 100 else 101 break; 102 if (c >= base) 103 break; 104 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 105 any = -1; 106 else { 107 any = 1; 108 acc *= base; 109 acc += c; 110 } 111 } 112 if (any < 0) { 113 acc = ULONG_MAX; 114 errno = ERANGE; 115 } else if (!any) { 116 noconv: 117 errno = EINVAL; 118 } else if (neg) 119 acc = -acc; 120 if (endptr != NULL) 121 *endptr = (wchar_t *)(any ? s - 1 : nptr); 122 return (acc); 123 } 124 unsigned long 125 wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 126 { 127 return wcstoul_l(nptr, endptr, base, __get_locale()); 128 } 129