diff options
Diffstat (limited to 'lib/libc/locale/tolower.c')
-rw-r--r-- | lib/libc/locale/tolower.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/libc/locale/tolower.c b/lib/libc/locale/tolower.c new file mode 100644 index 0000000..f2eb483 --- /dev/null +++ b/lib/libc/locale/tolower.c @@ -0,0 +1,79 @@ +/*- + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Paul Borman at Krystal Technologies. + * + * 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. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <ctype.h> +#include <stdio.h> +#include <runetype.h> +#include <wchar.h> +#include "mblocal.h" + +__ct_rune_t +___tolower_l(c, l) + __ct_rune_t c; + locale_t l; +{ + size_t lim; + FIX_LOCALE(l); + _RuneRange *rr = &XLOCALE_CTYPE(l)->runes->__maplower_ext; + _RuneEntry *base, *re; + + if (c < 0 || c == EOF) + return(c); + + /* Binary search -- see bsearch.c for explanation. */ + base = rr->__ranges; + for (lim = rr->__nranges; lim != 0; lim >>= 1) { + re = base + (lim >> 1); + if (re->__min <= c && c <= re->__max) + return (re->__map + c - re->__min); + else if (c > re->__max) { + base = re + 1; + lim--; + } + } + + return(c); +} +__ct_rune_t +___tolower(c) + __ct_rune_t c; +{ + return ___tolower_l(c, __get_locale()); +} |