1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2004 Tim J. Robbins. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef CMAP_H 30 #define CMAP_H 31 32 #include <limits.h> 33 #include <stdbool.h> 34 #include <wchar.h> 35 36 struct cmapnode { 37 wint_t cmn_from; 38 wint_t cmn_to; 39 struct cmapnode *cmn_left; 40 struct cmapnode *cmn_right; 41 }; 42 43 struct cmap { 44 #define CM_CACHE_SIZE 128 45 wint_t cm_cache[CM_CACHE_SIZE]; 46 bool cm_havecache; 47 struct cmapnode *cm_root; 48 #define CM_DEF_SELF -2 49 wint_t cm_def; 50 wint_t cm_min; 51 wint_t cm_max; 52 }; 53 54 struct cmap * cmap_alloc(void); 55 bool cmap_add(struct cmap *, wint_t, wint_t); 56 wint_t cmap_lookup_hard(struct cmap *, wint_t); 57 void cmap_cache(struct cmap *); 58 wint_t cmap_default(struct cmap *, wint_t); 59 60 static __inline wint_t 61 cmap_lookup(struct cmap *cm, wint_t from) 62 { 63 64 if (from < CM_CACHE_SIZE && cm->cm_havecache) 65 return (cm->cm_cache[from]); 66 return (cmap_lookup_hard(cm, from)); 67 } 68 69 static __inline wint_t 70 cmap_min(struct cmap *cm) 71 { 72 73 return (cm->cm_min); 74 } 75 76 static __inline wint_t 77 cmap_max(struct cmap *cm) 78 { 79 80 return (cm->cm_max); 81 } 82 83 #endif 84