1e92a3d83STim J. Robbins /*- 2e92a3d83STim J. Robbins * Copyright (c) 2002 Tim J. Robbins. 3e92a3d83STim J. Robbins * All rights reserved. 4e92a3d83STim J. Robbins * 5e92a3d83STim J. Robbins * Redistribution and use in source and binary forms, with or without 6e92a3d83STim J. Robbins * modification, are permitted provided that the following conditions 7e92a3d83STim J. Robbins * are met: 8e92a3d83STim J. Robbins * 1. Redistributions of source code must retain the above copyright 9e92a3d83STim J. Robbins * notice, this list of conditions and the following disclaimer. 10e92a3d83STim J. Robbins * 2. Redistributions in binary form must reproduce the above copyright 11e92a3d83STim J. Robbins * notice, this list of conditions and the following disclaimer in the 12e92a3d83STim J. Robbins * documentation and/or other materials provided with the distribution. 13e92a3d83STim J. Robbins * 14e92a3d83STim J. Robbins * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15e92a3d83STim J. Robbins * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16e92a3d83STim J. Robbins * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17e92a3d83STim J. Robbins * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18e92a3d83STim J. Robbins * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19e92a3d83STim J. Robbins * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20e92a3d83STim J. Robbins * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21e92a3d83STim J. Robbins * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22e92a3d83STim J. Robbins * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23e92a3d83STim J. Robbins * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24e92a3d83STim J. Robbins * SUCH DAMAGE. 25e92a3d83STim J. Robbins */ 26e92a3d83STim J. Robbins 27e92a3d83STim J. Robbins #include <sys/cdefs.h> 28e92a3d83STim J. Robbins __FBSDID("$FreeBSD$"); 29e92a3d83STim J. Robbins 30e92a3d83STim J. Robbins #include <errno.h> 31e92a3d83STim J. Robbins #include <limits.h> 32e92a3d83STim J. Robbins #include <stdlib.h> 33e92a3d83STim J. Robbins #include <wchar.h> 34e92a3d83STim J. Robbins 35e92a3d83STim J. Robbins size_t 36e92a3d83STim J. Robbins mbsrtowcs(wchar_t *__restrict dst, const char **__restrict src, size_t len, 37e92a3d83STim J. Robbins mbstate_t *__restrict ps __unused) 38e92a3d83STim J. Robbins { 39e92a3d83STim J. Robbins const char *s; 40e92a3d83STim J. Robbins size_t nchr; 41e92a3d83STim J. Robbins wchar_t wc; 42e92a3d83STim J. Robbins int nb; 43e92a3d83STim J. Robbins 44e92a3d83STim J. Robbins s = *src; 45e92a3d83STim J. Robbins nchr = 0; 46e92a3d83STim J. Robbins 47e92a3d83STim J. Robbins if (dst == NULL) { 48e92a3d83STim J. Robbins for (;;) { 49e92a3d83STim J. Robbins if ((nb = (int)mbrtowc(&wc, s, MB_CUR_MAX, NULL)) < 0) 50e92a3d83STim J. Robbins /* Invalid sequence - mbrtowc() sets errno. */ 51e92a3d83STim J. Robbins return ((size_t)-1); 52e92a3d83STim J. Robbins else if (nb == 0) 53e92a3d83STim J. Robbins return (nchr); 54e92a3d83STim J. Robbins s += nb; 55e92a3d83STim J. Robbins nchr++; 56e92a3d83STim J. Robbins } 57e92a3d83STim J. Robbins /*NOTREACHED*/ 58e92a3d83STim J. Robbins } 59e92a3d83STim J. Robbins 60e92a3d83STim J. Robbins while (len-- > 0) { 61e92a3d83STim J. Robbins if ((nb = (int)mbrtowc(dst, s, MB_CUR_MAX, NULL)) < 0) { 62e92a3d83STim J. Robbins *src = s; 63e92a3d83STim J. Robbins return ((size_t)-1); 64e92a3d83STim J. Robbins } else if (nb == 0) { 65e92a3d83STim J. Robbins *src = NULL; 66e92a3d83STim J. Robbins return (nchr); 67e92a3d83STim J. Robbins } 68e92a3d83STim J. Robbins s += nb; 69e92a3d83STim J. Robbins nchr++; 70e92a3d83STim J. Robbins dst++; 71e92a3d83STim J. Robbins } 72e92a3d83STim J. Robbins *src = s; 73e92a3d83STim J. Robbins return (nchr); 74e92a3d83STim J. Robbins } 75