Annotation of mandoc/mdoc_hash.c, Revision 1.16
1.16 ! kristaps 1: /* $Id: mdoc_hash.c,v 1.15 2010/05/17 22:11:42 kristaps Exp $ */
1.1 kristaps 2: /*
1.16 ! kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.3 kristaps 6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: *
1.3 kristaps 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.
1.1 kristaps 16: */
1.12 kristaps 17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
1.8 kristaps 21: #include <sys/types.h>
22:
1.1 kristaps 23: #include <assert.h>
24: #include <ctype.h>
1.9 kristaps 25: #include <limits.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <stdio.h>
28: #include <string.h>
29:
1.15 kristaps 30: #include "mandoc.h"
1.1 kristaps 31: #include "libmdoc.h"
32:
1.10 kristaps 33: static u_char table[27 * 12];
1.6 kristaps 34:
1.11 kristaps 35: /*
36: * XXX - this hash has global scope, so if intended for use as a library
37: * with multiple callers, it will need re-invocation protection.
38: */
1.1 kristaps 39: void
1.9 kristaps 40: mdoc_hash_init(void)
1.1 kristaps 41: {
1.9 kristaps 42: int i, j, major;
43: const char *p;
1.1 kristaps 44:
1.9 kristaps 45: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 46:
1.14 kristaps 47: for (i = 0; i < (int)MDOC_MAX; i++) {
1.9 kristaps 48: p = mdoc_macronames[i];
1.1 kristaps 49:
1.9 kristaps 50: if (isalpha((u_char)p[1]))
51: major = 12 * (tolower((u_char)p[1]) - 97);
52: else
53: major = 12 * 26;
54:
55: for (j = 0; j < 12; j++)
56: if (UCHAR_MAX == table[major + j]) {
1.10 kristaps 57: table[major + j] = (u_char)i;
1.9 kristaps 58: break;
59: }
1.1 kristaps 60:
1.9 kristaps 61: assert(j < 12);
1.1 kristaps 62: }
63: }
64:
1.13 kristaps 65: enum mdoct
1.9 kristaps 66: mdoc_hash_find(const char *p)
1.1 kristaps 67: {
1.9 kristaps 68: int major, i, j;
1.1 kristaps 69:
1.9 kristaps 70: if (0 == p[0])
1.6 kristaps 71: return(MDOC_MAX);
1.9 kristaps 72: if ( ! isalpha((u_char)p[0]) && '%' != p[0])
1.1 kristaps 73: return(MDOC_MAX);
1.6 kristaps 74:
1.9 kristaps 75: if (isalpha((u_char)p[1]))
76: major = 12 * (tolower((u_char)p[1]) - 97);
77: else if ('1' == p[1])
78: major = 12 * 26;
79: else
1.1 kristaps 80: return(MDOC_MAX);
81:
1.9 kristaps 82: if (p[2] && p[3])
1.1 kristaps 83: return(MDOC_MAX);
84:
1.9 kristaps 85: for (j = 0; j < 12; j++) {
86: if (UCHAR_MAX == (i = table[major + j]))
87: break;
88: if (0 == strcmp(p, mdoc_macronames[i]))
1.13 kristaps 89: return((enum mdoct)i);
1.1 kristaps 90: }
91:
92: return(MDOC_MAX);
93: }
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