1/* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: src/lib/libc/locale/wcstoul.c,v 1.2 2007/01/09 00:28:01 imp Exp $"); 32 33#include "xlocale_private.h" 34 35#include <ctype.h> 36#include <errno.h> 37#include <limits.h> 38#include <wchar.h> 39#include <wctype.h> 40 41/* 42 * Convert a wide character string to an unsigned long integer. 43 */ 44unsigned long 45wcstoul_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 46 int base, locale_t loc) 47{ 48 const wchar_t *s; 49 unsigned long acc; 50 wchar_t c; 51 unsigned long cutoff; 52 int neg, any, cutlim; 53 54 NORMALIZE_LOCALE(loc); 55 /* 56 * See strtol for comments as to the logic used. 57 */ 58 s = nptr; 59 do { 60 c = *s++; 61 } while (iswspace_l(c, loc)); 62 if (c == L'-') { 63 neg = 1; 64 c = *s++; 65 } else { 66 neg = 0; 67 if (c == L'+') 68 c = *s++; 69 } 70 if ((base == 0 || base == 16) && 71 c == L'0' && (*s == L'x' || *s == L'X')) { 72 c = s[1]; 73 s += 2; 74 base = 16; 75 } 76 if (base == 0) 77 base = c == L'0' ? 8 : 10; 78 acc = any = 0; 79 if (base < 2 || base > 36) 80 goto noconv; 81 82 cutoff = ULONG_MAX / base; 83 cutlim = ULONG_MAX % base; 84 for ( ; ; c = *s++) { 85#ifdef notyet 86 if (iswdigit_l(c, loc)) 87 c = digittoint_l(c, loc); 88 else 89#endif 90 if (c >= L'0' && c <= L'9') 91 c -= L'0'; 92 else if (c >= L'A' && c <= L'Z') 93 c -= L'A' - 10; 94 else if (c >= L'a' && c <= L'z') 95 c -= L'a' - 10; 96 else 97 break; 98 if (c >= base) 99 break; 100 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 101 any = -1; 102 else { 103 any = 1; 104 acc *= base; 105 acc += c; 106 } 107 } 108 if (any < 0) { 109 acc = ULONG_MAX; 110 errno = ERANGE; 111 } else if (!any) { 112noconv: 113 errno = EINVAL; 114 } else if (neg) 115 acc = -acc; 116 if (endptr != NULL) 117 *endptr = (wchar_t *)(any ? s - 1 : nptr); 118 return (acc); 119} 120 121unsigned long 122wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 123{ 124 return wcstoul_l(nptr, endptr, base, __current_locale()); 125} 126