1/* $NetBSD: _wcstol.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 * @(#)strtol.c 8.1 (Berkeley) 6/4/93 33 * NetBSD: wcstol.c,v 1.1 2001/09/27 16:30:36 yamt Exp 34 * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstol.c,v 1.2 2001/09/21 16:11:41 yamt Exp 35 */ 36 37/* 38 * function template for wcstol, wcstoll and wcstoimax. 39 * 40 * parameters: 41 * _FUNCNAME : function name 42 * __INT : return type 43 * __INT_MIN : lower limit of the return type 44 * __INT_MAX : upper limit of the return type 45 */ 46 47#include <locale.h> 48#include "setlocale_local.h" 49#define INT_FUNCNAME_(pre, name, post) pre ## name ## post 50#define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post) 51 52static __INT 53INT_FUNCNAME(_int_, _FUNCNAME, _l)(const wchar_t *nptr, wchar_t **endptr, 54 int base, locale_t loc) 55{ 56 const wchar_t *s; 57 __INT acc, cutoff; 58 wint_t wc; 59 int i; 60 int neg, any, cutlim; 61 62 _DIAGASSERT(nptr != NULL); 63 /* endptr may be NULL */ 64 65#ifdef __GNUC__ 66 (void)&acc; (void)&cutoff; 67#endif 68 69 /* check base value */ 70 if (base && (base < 2 || base > 36)) { 71 errno = EINVAL; 72 return 0; 73 } 74 75 /* 76 * Skip white space and pick up leading +/- sign if any. 77 * If base is 0, allow 0x for hex and 0 for octal, else 78 * assume decimal; if base is already 16, allow 0x. 79 */ 80 s = nptr; 81 do { 82 wc = (wchar_t) *s++; 83 } while (iswspace_l(wc, loc)); 84 if (wc == L'-') { 85 neg = 1; 86 wc = *s++; 87 } else { 88 neg = 0; 89 if (wc == L'+') 90 wc = *s++; 91 } 92 if ((base == 0 || base == 16) && 93 wc == L'0' && (*s == L'x' || *s == L'X')) { 94 wc = s[1]; 95 s += 2; 96 base = 16; 97 } 98 if (base == 0) 99 base = wc == L'0' ? 8 : 10; 100 101 /* 102 * See strtol for comments as to the logic used. 103 */ 104 cutoff = neg ? __INT_MIN : __INT_MAX; 105 cutlim = (int)(cutoff % base); 106 cutoff /= base; 107 if (neg) { 108 if (cutlim > 0) { 109 cutlim -= base; 110 cutoff += 1; 111 } 112 cutlim = -cutlim; 113 } 114 for (acc = 0, any = 0;; wc = (wchar_t) *s++) { 115 i = __wctoint(wc); 116 if (i == -1) 117 break; 118 if (i >= base) 119 break; 120 if (any < 0) 121 continue; 122 if (neg) { 123 if (acc < cutoff || (acc == cutoff && i > cutlim)) { 124 any = -1; 125 acc = __INT_MIN; 126 errno = ERANGE; 127 } else { 128 any = 1; 129 acc *= base; 130 acc -= i; 131 } 132 } else { 133 if (acc > cutoff || (acc == cutoff && i > cutlim)) { 134 any = -1; 135 acc = __INT_MAX; 136 errno = ERANGE; 137 } else { 138 any = 1; 139 acc *= base; 140 acc += i; 141 } 142 } 143 } 144 if (endptr != 0) 145 *endptr = __UNCONST(any ? s - 1 : nptr); 146 return (acc); 147} 148 149__INT 150_FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base) 151{ 152 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, 153 _current_locale()); 154} 155 156__INT 157INT_FUNCNAME(, _FUNCNAME, _l)(const wchar_t *nptr, wchar_t **endptr, 158 int base, locale_t loc) 159{ 160 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc); 161} 162