1 /*- 2 * Copyright (c) 2002, 2003 Tim J. Robbins 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <stdlib.h> 31 #include <wchar.h> 32 #include <wctype.h> 33 34 /* 35 * See wcstod() for comments as to the logic used. 36 */ 37 long double 38 wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr) 39 { 40 static const mbstate_t initial; 41 mbstate_t mbs; 42 long double val; 43 char *buf, *end; 44 const wchar_t *wcp; 45 size_t len; 46 47 while (iswspace(*nptr)) 48 nptr++; 49 50 wcp = nptr; 51 mbs = initial; 52 if ((len = wcsrtombs(NULL, &wcp, 0, &mbs)) == (size_t)-1) { 53 if (endptr != NULL) 54 *endptr = (wchar_t *)nptr; 55 return (0.0); 56 } 57 if ((buf = malloc(len + 1)) == NULL) 58 return (0.0); 59 mbs = initial; 60 wcsrtombs(buf, &wcp, len + 1, &mbs); 61 62 val = strtold(buf, &end); 63 64 if (endptr != NULL) 65 *endptr = (wchar_t *)nptr + (end - buf); 66 67 free(buf); 68 69 return (val); 70 } 71