| /* $OpenBSD: _wcstoul.h,v 1.1 2005/07/01 08:59:27 espie Exp $ */ |
| /* $NetBSD: _wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp $ */ |
| |
| /* |
| * Copyright (c) 1990, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * Original version ID: |
| * @(#)strtoul.c 8.1 (Berkeley) 6/4/93 |
| * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstoul.c,v 1.2 2001/09/21 16:11:41 yamt Exp |
| * NetBSD: wcstoul.c,v 1.1 2001/09/27 16:30:37 yamt Exp |
| */ |
| |
| /* |
| * function template for wcstoul, wcstoull and wcstoumax. |
| * |
| * parameters: |
| * FUNCNAME : function name |
| * uint_type : return type |
| * MAX_VALUE : upper limit of the return type |
| */ |
| |
| uint_type |
| FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base) |
| { |
| const wchar_t *s; |
| uint_type acc, cutoff; |
| wint_t wc; |
| int i; |
| int neg, any, cutlim; |
| |
| if (base && (base < 2 || base > 36)) { |
| errno = EINVAL; |
| return 0; |
| } |
| |
| /* |
| * Skip white space and pick up leading +/- sign if any. |
| * If base is 0, allow 0x for hex and 0 for octal, else |
| * assume decimal; if base is already 16, allow 0x. |
| */ |
| s = nptr; |
| do { |
| wc = (wchar_t) *s++; |
| } while (iswspace(wc)); |
| if (wc == L'-') { |
| neg = 1; |
| wc = *s++; |
| } else { |
| neg = 0; |
| if (wc == L'+') |
| wc = *s++; |
| } |
| if ((base == 0 || base == 16) && |
| wc == L'0' && (*s == L'x' || *s == L'X')) { |
| wc = s[1]; |
| s += 2; |
| base = 16; |
| } |
| if (base == 0) |
| base = wc == L'0' ? 8 : 10; |
| |
| /* |
| * See strtoul for comments as to the logic used. |
| */ |
| cutoff = MAX_VALUE / (uint_type)base; |
| cutlim = (int)(MAX_VALUE % (uint_type)base); |
| for (acc = 0, any = 0;; wc = (wchar_t) *s++) { |
| i = wctoint(wc); |
| if (i == (wint_t)-1) |
| break; |
| if (i >= base) |
| break; |
| if (any < 0) |
| continue; |
| if (acc > cutoff || (acc == cutoff && i > cutlim)) { |
| any = -1; |
| acc = MAX_VALUE; |
| errno = ERANGE; |
| } else { |
| any = 1; |
| acc *= (uint_type)base; |
| acc += i; |
| } |
| } |
| if (neg && any > 0) |
| acc = -acc; |
| if (endptr != 0) |
| /* LINTED interface specification */ |
| *endptr = (wchar_t *)(any ? s - 1 : nptr); |
| return (acc); |
| } |