1 /* 2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * (c) UNIX System Laboratories, Inc. 6 * All or some portions of this file are derived from material licensed 7 * to the University of California by American Telephone and Telegraph 8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 9 * the permission of UNIX System Laboratories, Inc. 10 * 11 * This code is derived from software contributed to Berkeley by 12 * Paul Borman at Krystal Technologies. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include "lint.h" 40 #include <wctype.h> 41 #include <stdio.h> 42 #include "runetype.h" 43 44 static wint_t 45 __change_case_ext(wint_t c, int lower) 46 { 47 size_t lim; 48 _RuneRange *rr; 49 _RuneEntry *base, *re; 50 51 if (c < 0 || c == EOF) 52 return (c); 53 54 rr = lower ? 55 &_CurrentRuneLocale->__maplower_ext : 56 &_CurrentRuneLocale->__mapupper_ext; 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 72 #undef towlower 73 wint_t 74 towlower(wint_t wc) 75 { 76 return ((wc < 0 || wc >= _CACHED_RUNES) ? 77 __change_case_ext(wc, 1) : 78 _CurrentRuneLocale->__maplower[wc]); 79 } 80 81 #undef towupper 82 wint_t 83 towupper(wint_t wc) 84 { 85 return ((wc < 0 || wc >= _CACHED_RUNES) ? 86 __change_case_ext(wc, 0) : 87 _CurrentRuneLocale->__mapupper[wc]); 88 } 89