| Elliott Hughes | 3d7a0d9 | 2014-04-29 14:46:56 -0700 | [diff] [blame] | 1 | /* $OpenBSD: _wcstoul.h,v 1.1 2005/07/01 08:59:27 espie Exp $ */ |
| 2 | /* $NetBSD: _wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1990, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | * |
| 32 | * Original version ID: |
| 33 | * @(#)strtoul.c 8.1 (Berkeley) 6/4/93 |
| 34 | * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstoul.c,v 1.2 2001/09/21 16:11:41 yamt Exp |
| 35 | * NetBSD: wcstoul.c,v 1.1 2001/09/27 16:30:37 yamt Exp |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * function template for wcstoul, wcstoull and wcstoumax. |
| 40 | * |
| 41 | * parameters: |
| 42 | * FUNCNAME : function name |
| 43 | * uint_type : return type |
| 44 | * MAX_VALUE : upper limit of the return type |
| 45 | */ |
| 46 | |
| 47 | uint_type |
| 48 | FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base) |
| 49 | { |
| 50 | const wchar_t *s; |
| 51 | uint_type acc, cutoff; |
| 52 | wint_t wc; |
| 53 | int i; |
| 54 | int neg, any, cutlim; |
| 55 | |
| 56 | if (base && (base < 2 || base > 36)) { |
| 57 | errno = EINVAL; |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | * Skip white space and pick up leading +/- sign if any. |
| 63 | * If base is 0, allow 0x for hex and 0 for octal, else |
| 64 | * assume decimal; if base is already 16, allow 0x. |
| 65 | */ |
| 66 | s = nptr; |
| 67 | do { |
| 68 | wc = (wchar_t) *s++; |
| 69 | } while (iswspace(wc)); |
| 70 | if (wc == L'-') { |
| 71 | neg = 1; |
| 72 | wc = *s++; |
| 73 | } else { |
| 74 | neg = 0; |
| 75 | if (wc == L'+') |
| 76 | wc = *s++; |
| 77 | } |
| 78 | if ((base == 0 || base == 16) && |
| 79 | wc == L'0' && (*s == L'x' || *s == L'X')) { |
| 80 | wc = s[1]; |
| 81 | s += 2; |
| 82 | base = 16; |
| 83 | } |
| 84 | if (base == 0) |
| 85 | base = wc == L'0' ? 8 : 10; |
| 86 | |
| 87 | /* |
| 88 | * See strtoul for comments as to the logic used. |
| 89 | */ |
| 90 | cutoff = MAX_VALUE / (uint_type)base; |
| 91 | cutlim = (int)(MAX_VALUE % (uint_type)base); |
| 92 | for (acc = 0, any = 0;; wc = (wchar_t) *s++) { |
| 93 | i = wctoint(wc); |
| 94 | if (i == (wint_t)-1) |
| 95 | break; |
| 96 | if (i >= base) |
| 97 | break; |
| 98 | if (any < 0) |
| 99 | continue; |
| 100 | if (acc > cutoff || (acc == cutoff && i > cutlim)) { |
| 101 | any = -1; |
| 102 | acc = MAX_VALUE; |
| 103 | errno = ERANGE; |
| 104 | } else { |
| 105 | any = 1; |
| 106 | acc *= (uint_type)base; |
| 107 | acc += i; |
| 108 | } |
| 109 | } |
| 110 | if (neg && any > 0) |
| 111 | acc = -acc; |
| 112 | if (endptr != 0) |
| 113 | /* LINTED interface specification */ |
| 114 | *endptr = (wchar_t *)(any ? s - 1 : nptr); |
| 115 | return (acc); |
| 116 | } |