1/* $NetBSD: _wcstoul.h,v 1.5 2013/04/16 16:52:13 joerg Exp $ */ 2 3/* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * Original version ID: 32 * @(#)strtoul.c 8.1 (Berkeley) 6/4/93 33 * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstoul.c,v 1.2 2001/09/21 16:11:41 yamt Exp 34 * NetBSD: wcstoul.c,v 1.1 2001/09/27 16:30:37 yamt Exp 35 */ 36 37/* 38 * function template for wcstoul, wcstoull and wcstoumax. 39 * 40 * parameters: 41 * _FUNCNAME : function name 42 * __UINT : return type 43 * __UINT_MAX : upper limit of the return type 44 */ 45 46#include <locale.h> 47#include "setlocale_local.h" 48#define INT_FUNCNAME_(pre, name, post) pre ## name ## post 49#define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post) 50 51static __UINT 52INT_FUNCNAME(_int_, _FUNCNAME, _l)(const wchar_t *nptr, wchar_t **endptr, 53 int base, locale_t loc) 54{ 55 const wchar_t *s; 56 __UINT acc, cutoff; 57 wint_t wc; 58 int i; 59 int neg, any, cutlim; 60 61 _DIAGASSERT(nptr != NULL); 62 /* endptr may be NULL */ 63 64 if (base && (base < 2 || base > 36)) { 65 errno = EINVAL; 66 return 0; 67 } 68 69 /* 70 * Skip white space and pick up leading +/- sign if any. 71 * If base is 0, allow 0x for hex and 0 for octal, else 72 * assume decimal; if base is already 16, allow 0x. 73 */ 74 s = nptr; 75 do { 76 wc = (wchar_t) *s++; 77 } while (iswspace_l(wc, loc)); 78 if (wc == L'-') { 79 neg = 1; 80 wc = *s++; 81 } else { 82 neg = 0; 83 if (wc == L'+') 84 wc = *s++; 85 } 86 if ((base == 0 || base == 16) && 87 wc == L'0' && (*s == L'x' || *s == L'X')) { 88 wc = s[1]; 89 s += 2; 90 base = 16; 91 } 92 if (base == 0) 93 base = wc == L'0' ? 8 : 10; 94 95 /* 96 * See strtoul for comments as to the logic used. 97 */ 98 cutoff = __UINT_MAX / (__UINT)base; 99 cutlim = (int)(__UINT_MAX % (__UINT)base); 100 for (acc = 0, any = 0;; wc = (wchar_t) *s++) { 101 i = __wctoint(wc); 102 if (i == (wint_t)-1) 103 break; 104 if (i >= base) 105 break; 106 if (any < 0) 107 continue; 108 if (acc > cutoff || (acc == cutoff && i > cutlim)) { 109 any = -1; 110 acc = __UINT_MAX; 111 errno = ERANGE; 112 } else { 113 any = 1; 114 acc *= (__UINT)base; 115 acc += i; 116 } 117 } 118 if (neg && any > 0) 119 acc = -acc; 120 if (endptr != 0) 121 *endptr = __UNCONST(any ? s - 1 : nptr); 122 return (acc); 123} 124 125__UINT 126_FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base) 127{ 128 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, 129 _current_locale()); 130} 131 132__UINT 133INT_FUNCNAME(, _FUNCNAME, _l)(const wchar_t *nptr, wchar_t **endptr, 134 int base, locale_t loc) 135{ 136 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc); 137} 138