Annotation of mandoc/mdoc_hash.c, Revision 1.18
1.18 ! kristaps 1: /* $Id: mdoc_hash.c,v 1.17 2011/03/22 14:33:05 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:
1.17 kristaps 30: #include "mdoc.h"
1.15 kristaps 31: #include "mandoc.h"
1.1 kristaps 32: #include "libmdoc.h"
33:
1.18 ! kristaps 34: static unsigned char table[27 * 12];
1.6 kristaps 35:
1.11 kristaps 36: /*
37: * XXX - this hash has global scope, so if intended for use as a library
38: * with multiple callers, it will need re-invocation protection.
39: */
1.1 kristaps 40: void
1.9 kristaps 41: mdoc_hash_init(void)
1.1 kristaps 42: {
1.9 kristaps 43: int i, j, major;
44: const char *p;
1.1 kristaps 45:
1.9 kristaps 46: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 47:
1.14 kristaps 48: for (i = 0; i < (int)MDOC_MAX; i++) {
1.9 kristaps 49: p = mdoc_macronames[i];
1.1 kristaps 50:
1.18 ! kristaps 51: if (isalpha((unsigned char)p[1]))
! 52: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9 kristaps 53: else
54: major = 12 * 26;
55:
56: for (j = 0; j < 12; j++)
57: if (UCHAR_MAX == table[major + j]) {
1.18 ! kristaps 58: table[major + j] = (unsigned char)i;
1.9 kristaps 59: break;
60: }
1.1 kristaps 61:
1.9 kristaps 62: assert(j < 12);
1.1 kristaps 63: }
64: }
65:
1.13 kristaps 66: enum mdoct
1.9 kristaps 67: mdoc_hash_find(const char *p)
1.1 kristaps 68: {
1.9 kristaps 69: int major, i, j;
1.1 kristaps 70:
1.9 kristaps 71: if (0 == p[0])
1.6 kristaps 72: return(MDOC_MAX);
1.18 ! kristaps 73: if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.1 kristaps 74: return(MDOC_MAX);
1.6 kristaps 75:
1.18 ! kristaps 76: if (isalpha((unsigned char)p[1]))
! 77: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9 kristaps 78: else if ('1' == p[1])
79: major = 12 * 26;
80: else
1.1 kristaps 81: return(MDOC_MAX);
82:
1.9 kristaps 83: if (p[2] && p[3])
1.1 kristaps 84: return(MDOC_MAX);
85:
1.9 kristaps 86: for (j = 0; j < 12; j++) {
87: if (UCHAR_MAX == (i = table[major + j]))
88: break;
89: if (0 == strcmp(p, mdoc_macronames[i]))
1.13 kristaps 90: return((enum mdoct)i);
1.1 kristaps 91: }
92:
93: return(MDOC_MAX);
94: }
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