1 /* $NetBSD: _wcstoul.h,v 1.1 2003/03/11 09:21:23 tshiozak 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Original version ID: 36 * @(#)strtoul.c 8.1 (Berkeley) 6/4/93 37 * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstoul.c,v 1.2 2001/09/21 16:11:41 yamt Exp 38 * NetBSD: wcstoul.c,v 1.1 2001/09/27 16:30:37 yamt Exp 39 */ 40 41 /* 42 * function template for wcstoul, wcstoull and wcstoumax. 43 * 44 * parameters: 45 * _FUNCNAME : function name 46 * __UINT : return type 47 * __UINT_MAX : upper limit of the return type 48 */ 49 50 __UINT 51 _FUNCNAME(nptr, endptr, base) 52 const wchar_t *nptr; 53 wchar_t **endptr; 54 int base; 55 { 56 const wchar_t *s; 57 __UINT 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 if (base && (base < 2 || base > 36)) { 66 errno = EINVAL; 67 return 0; 68 } 69 70 /* 71 * Skip white space and pick up leading +/- sign if any. 72 * If base is 0, allow 0x for hex and 0 for octal, else 73 * assume decimal; if base is already 16, allow 0x. 74 */ 75 s = nptr; 76 do { 77 wc = (wchar_t) *s++; 78 } while (iswspace(wc)); 79 if (wc == L'-') { 80 neg = 1; 81 wc = *s++; 82 } else { 83 neg = 0; 84 if (wc == L'+') 85 wc = *s++; 86 } 87 if ((base == 0 || base == 16) && 88 wc == L'0' && (*s == L'x' || *s == L'X')) { 89 wc = s[1]; 90 s += 2; 91 base = 16; 92 } 93 if (base == 0) 94 base = wc == L'0' ? 8 : 10; 95 96 /* 97 * See strtoul for comments as to the logic used. 98 */ 99 cutoff = __UINT_MAX / (__UINT)base; 100 cutlim = (int)(__UINT_MAX % (__UINT)base); 101 for (acc = 0, any = 0;; wc = (wchar_t) *s++) { 102 i = __wctoint(wc); 103 if (i == (wint_t)-1) 104 break; 105 if (i >= base) 106 break; 107 if (any < 0) 108 continue; 109 if (acc > cutoff || (acc == cutoff && i > cutlim)) { 110 any = -1; 111 acc = __UINT_MAX; 112 errno = ERANGE; 113 } else { 114 any = 1; 115 acc *= (__UINT)base; 116 acc += i; 117 } 118 } 119 if (neg && any > 0) 120 acc = -acc; 121 if (endptr != 0) 122 /* LINTED interface specification */ 123 *endptr = (wchar_t *)(any ? s - 1 : nptr); 124 return (acc); 125 } 126