1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Paul Borman at Krystal Technologies. 7 * 8 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <ctype.h> 42 #include <stdio.h> 43 #include <runetype.h> 44 #include <wchar.h> 45 #include "mblocal.h" 46 47 __ct_rune_t 48 ___tolower_l(__ct_rune_t c, locale_t l) 49 { 50 size_t lim; 51 FIX_LOCALE(l); 52 _RuneRange *rr = &XLOCALE_CTYPE(l)->runes->__maplower_ext; 53 _RuneEntry *base, *re; 54 55 if (c < 0 || c == EOF) 56 return(c); 57 58 /* Binary search -- see bsearch.c for explanation. */ 59 base = rr->__ranges; 60 for (lim = rr->__nranges; lim != 0; lim >>= 1) { 61 re = base + (lim >> 1); 62 if (re->__min <= c && c <= re->__max) 63 return (re->__map + c - re->__min); 64 else if (c > re->__max) { 65 base = re + 1; 66 lim--; 67 } 68 } 69 70 return(c); 71 } 72 __ct_rune_t 73 ___tolower(__ct_rune_t c) 74 { 75 return ___tolower_l(c, __get_locale()); 76 } 77