projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5b2abdfb A |
1 | /*- |
| 2 | * Copyright (c) 1993 | |
| e9ce8d39 A |
3 | * The Regents of the University of California. All rights reserved. |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 5b2abdfb | 6 | * Paul Borman at Krystal Technologies. |
| e9ce8d39 A |
7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| e9ce8d39 A |
16 | * 4. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software | |
| 18 | * without specific prior written permission. | |
| 19 | * | |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | */ | |
| 32 | ||
| 9385eb3d | 33 | #include <sys/cdefs.h> |
| 1f2f436a | 34 | __FBSDID("$FreeBSD: src/lib/libc/locale/tolower.c,v 1.13 2007/01/09 00:28:01 imp Exp $"); |
| ad3c9f2a A |
35 | |
| 36 | #include "xlocale_private.h" | |
| 9385eb3d | 37 | |
| 1f2f436a | 38 | #include <ctype.h> |
| e9ce8d39 | 39 | #include <stdio.h> |
| 3d9156a7 | 40 | #include <runetype.h> |
| e9ce8d39 | 41 | |
| 9385eb3d | 42 | __ct_rune_t |
| ad3c9f2a | 43 | ___tolower_l(c, loc) |
| 9385eb3d | 44 | __ct_rune_t c; |
| ad3c9f2a | 45 | locale_t loc; |
| e9ce8d39 | 46 | { |
| 3d9156a7 | 47 | size_t lim; |
| ad3c9f2a | 48 | _RuneRange *rr; |
| 3d9156a7 | 49 | _RuneEntry *base, *re; |
| 5b2abdfb A |
50 | |
| 51 | if (c < 0 || c == EOF) | |
| 52 | return(c); | |
| 53 | ||
| ad3c9f2a A |
54 | NORMALIZE_LOCALE(loc); |
| 55 | /* | |
| 56 | * the following is not used by tolower(), but can be used by | |
| 57 | * tolower_l(). This provides the oppurtunity to optimize tolower() | |
| 58 | * when compatibility for Panther and lower is no longer needed | |
| 59 | */ | |
| 60 | if (c < _CACHED_RUNES) | |
| 61 | return loc->__lc_ctype->_CurrentRuneLocale.__maplower[c]; | |
| 62 | rr = &loc->__lc_ctype->_CurrentRuneLocale.__maplower_ext; | |
| 3d9156a7 A |
63 | /* Binary search -- see bsearch.c for explanation. */ |
| 64 | base = rr->__ranges; | |
| 65 | for (lim = rr->__nranges; lim != 0; lim >>= 1) { | |
| 66 | re = base + (lim >> 1); | |
| 67 | if (re->__min <= c && c <= re->__max) | |
| 68 | return (re->__map + c - re->__min); | |
| 69 | else if (c > re->__max) { | |
| 70 | base = re + 1; | |
| 71 | lim--; | |
| 72 | } | |
| 5b2abdfb A |
73 | } |
| 74 | ||
| 75 | return(c); | |
| e9ce8d39 | 76 | } |
| ad3c9f2a A |
77 | |
| 78 | __ct_rune_t | |
| 79 | ___tolower(c) | |
| 80 | __ct_rune_t c; | |
| 81 | { | |
| 82 | return ___tolower_l(c, __current_locale()); | |
| 83 | } |