1 /* $OpenBSD: wcstod.c,v 1.1 2005/07/01 08:59:27 espie Exp $ */ 2 /* $NetBSD: wcstod.c,v 1.4 2001/10/28 12:08:43 yamt Exp $ */ 3 4 /*- 5 * Copyright (c)1999, 2000, 2001 Citrus Project, 6 * 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstod.c,v 1.2 2001/09/27 16:23:57 yamt Exp $ 30 */ 31 32 #include <sys/cdefs.h> 33 #include <errno.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <wchar.h> 37 #include <wctype.h> 38 39 double 40 wcstod(const wchar_t *nptr, wchar_t **endptr) 41 { 42 const wchar_t *src; 43 size_t size; 44 const wchar_t *start; 45 46 /* 47 * check length of string and call strtod 48 */ 49 src = nptr; 50 51 /* skip space first */ 52 while (iswspace(*src)) { 53 src++; 54 } 55 56 /* get length of string */ 57 start = src; 58 if (wcschr(L"+-", *src)) 59 src++; 60 size = wcsspn(src, L"0123456789"); 61 src += size; 62 if (*src == L'.') {/* XXX use localeconv */ 63 src++; 64 size = wcsspn(src, L"0123456789"); 65 src += size; 66 } 67 if (wcschr(L"Ee", *src)) { 68 src++; 69 if (wcschr(L"+-", *src)) 70 src++; 71 size = wcsspn(src, L"0123456789"); 72 src += size; 73 } 74 size = src - start; 75 76 /* 77 * convert to a char-string and pass it to strtod. 78 * 79 * since all mb chars used to represent a double-constant 80 * are in the portable character set, we can assume 81 * that they are 1-byte chars. 82 */ 83 if (size) 84 { 85 mbstate_t st; 86 char *buf; 87 char *end; 88 const wchar_t *s; 89 size_t size_converted; 90 double result; 91 92 buf = malloc(size + 1); 93 if (!buf) { 94 /* error */ 95 errno = ENOMEM; /* XXX */ 96 return 0; 97 } 98 99 s = start; 100 memset(&st, 0, sizeof(st)); 101 size_converted = wcsrtombs(buf, &s, size, &st); 102 if (size != size_converted) { 103 /* XXX should not happen */ 104 free(buf); 105 errno = EILSEQ; 106 return 0; 107 } 108 109 buf[size] = 0; 110 result = strtod(buf, &end); 111 112 free(buf); 113 114 if (endptr) 115 /* LINTED bad interface */ 116 *endptr = (wchar_t*)start + (end - buf); 117 118 return result; 119 } 120 121 if (endptr) 122 /* LINTED bad interface */ 123 *endptr = (wchar_t*)start; 124 125 return 0; 126 } 127