diff options
Diffstat (limited to 'lib/libc/locale/mbsrtowcs.c')
-rw-r--r-- | lib/libc/locale/mbsrtowcs.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/libc/locale/mbsrtowcs.c b/lib/libc/locale/mbsrtowcs.c new file mode 100644 index 0000000..25b6c17 --- /dev/null +++ b/lib/libc/locale/mbsrtowcs.c @@ -0,0 +1,74 @@ +/*- + * Copyright (c) 2002 Tim J. Robbins. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <errno.h> +#include <limits.h> +#include <stdlib.h> +#include <wchar.h> + +size_t +mbsrtowcs(wchar_t *__restrict dst, const char **__restrict src, size_t len, + mbstate_t *__restrict ps __unused) +{ + const char *s; + size_t nchr; + wchar_t wc; + int nb; + + s = *src; + nchr = 0; + + if (dst == NULL) { + for (;;) { + if ((nb = (int)mbrtowc(&wc, s, MB_CUR_MAX, NULL)) < 0) + /* Invalid sequence - mbrtowc() sets errno. */ + return ((size_t)-1); + else if (nb == 0) + return (nchr); + s += nb; + nchr++; + } + /*NOTREACHED*/ + } + + while (len-- > 0) { + if ((nb = (int)mbrtowc(dst, s, MB_CUR_MAX, NULL)) < 0) { + *src = s; + return ((size_t)-1); + } else if (nb == 0) { + *src = NULL; + return (nchr); + } + s += nb; + nchr++; + dst++; + } + *src = s; + return (nchr); +} |