1 /* $Id: mdoc_hash.c,v 1.11 2009/09/17 07:41:28 kristaps Exp $ */
3 * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
28 static u_char table[27 * 12];
31 * XXX - this hash has global scope, so if intended for use as a library
32 * with multiple callers, it will need re-invocation protection.
40 memset(table, UCHAR_MAX, sizeof(table));
42 for (i = 0; i < MDOC_MAX; i++) {
43 p = mdoc_macronames[i];
45 if (isalpha((u_char)p[1]))
46 major = 12 * (tolower((u_char)p[1]) - 97);
50 for (j = 0; j < 12; j++)
51 if (UCHAR_MAX == table[major + j]) {
52 table[major + j] = (u_char)i;
61 mdoc_hash_find(const char *p)
67 if ( ! isalpha((u_char)p[0]) && '%' != p[0])
70 if (isalpha((u_char)p[1]))
71 major = 12 * (tolower((u_char)p[1]) - 97);
80 for (j = 0; j < 12; j++) {
81 if (UCHAR_MAX == (i = table[major + j]))
83 if (0 == strcmp(p, mdoc_macronames[i]))