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