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Diffstat (limited to 'usr.bin/tr/cmap.h')
| -rw-r--r-- | usr.bin/tr/cmap.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/usr.bin/tr/cmap.h b/usr.bin/tr/cmap.h new file mode 100644 index 000000000000..6bcae292c02c --- /dev/null +++ b/usr.bin/tr/cmap.h @@ -0,0 +1,83 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2004 Tim J. Robbins. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef CMAP_H +#define CMAP_H + +#include <limits.h> +#include <stdbool.h> +#include <wchar.h> + +struct cmapnode { + wint_t cmn_from; + wint_t cmn_to; + struct cmapnode *cmn_left; + struct cmapnode *cmn_right; +}; + +struct cmap { +#define CM_CACHE_SIZE 128 + wint_t cm_cache[CM_CACHE_SIZE]; + bool cm_havecache; + struct cmapnode *cm_root; +#define CM_DEF_SELF -2 + wint_t cm_def; + wint_t cm_min; + wint_t cm_max; +}; + +struct cmap * cmap_alloc(void); +bool cmap_add(struct cmap *, wint_t, wint_t); +wint_t cmap_lookup_hard(struct cmap *, wint_t); +void cmap_cache(struct cmap *); +wint_t cmap_default(struct cmap *, wint_t); + +static __inline wint_t +cmap_lookup(struct cmap *cm, wint_t from) +{ + + if (from < CM_CACHE_SIZE && cm->cm_havecache) + return (cm->cm_cache[from]); + return (cmap_lookup_hard(cm, from)); +} + +static __inline wint_t +cmap_min(struct cmap *cm) +{ + + return (cm->cm_min); +} + +static __inline wint_t +cmap_max(struct cmap *cm) +{ + + return (cm->cm_max); +} + +#endif |