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Diffstat (limited to 'lib/libc/locale/wcsnrtombs.c')
-rw-r--r-- | lib/libc/locale/wcsnrtombs.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/lib/libc/locale/wcsnrtombs.c b/lib/libc/locale/wcsnrtombs.c new file mode 100644 index 0000000..2f3bf1e --- /dev/null +++ b/lib/libc/locale/wcsnrtombs.c @@ -0,0 +1,123 @@ +/*- + * Copyright (c) 2002-2004 Tim J. Robbins. + * All rights reserved. + * + * Copyright (c) 2011 The FreeBSD Foundation + * All rights reserved. + * Portions of this software were developed by David Chisnall + * under sponsorship from the FreeBSD Foundation. + * + * 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 <limits.h> +#include <stdlib.h> +#include <string.h> +#include <wchar.h> +#include "mblocal.h" + +size_t +wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, + size_t len, mbstate_t * __restrict ps, locale_t locale) +{ + FIX_LOCALE(locale); + if (ps == NULL) + ps = &locale->wcsnrtombs; + return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps)); +} +size_t +wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, + size_t len, mbstate_t * __restrict ps) +{ + return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale()); +} + + +size_t +__wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, + size_t nwc, size_t len, mbstate_t * __restrict ps) +{ + mbstate_t mbsbak; + char buf[MB_LEN_MAX]; + const wchar_t *s; + size_t nbytes; + size_t nb; + struct xlocale_ctype *l = XLOCALE_CTYPE(__get_locale()); + + s = *src; + nbytes = 0; + + if (dst == NULL) { + while (nwc-- > 0) { + if ((nb = l->__wcrtomb(buf, *s, ps)) == (size_t)-1) + /* Invalid character - wcrtomb() sets errno. */ + return ((size_t)-1); + else if (*s == L'\0') + return (nbytes + nb - 1); + s++; + nbytes += nb; + } + return (nbytes); + } + + while (len > 0 && nwc-- > 0) { + if (len > (size_t)MB_CUR_MAX) { + /* Enough space to translate in-place. */ + if ((nb = l->__wcrtomb(dst, *s, ps)) == (size_t)-1) { + *src = s; + return ((size_t)-1); + } + } else { + /* + * May not be enough space; use temp. buffer. + * + * We need to save a copy of the conversion state + * here so we can restore it if the multibyte + * character is too long for the buffer. + */ + mbsbak = *ps; + if ((nb = l->__wcrtomb(buf, *s, ps)) == (size_t)-1) { + *src = s; + return ((size_t)-1); + } + if (nb > (int)len) { + /* MB sequence for character won't fit. */ + *ps = mbsbak; + break; + } + memcpy(dst, buf, nb); + } + if (*s == L'\0') { + *src = NULL; + return (nbytes + nb - 1); + } + s++; + dst += nb; + len -= nb; + nbytes += nb; + } + *src = s; + return (nbytes); +} |