Annotation of mandoc/mdoc_hash.c, Revision 1.12
1.12 ! kristaps 1: /* $Id: mdoc_hash.c,v 1.11 2009/09/17 07:41:28 kristaps Exp $ */
1.1 kristaps 2: /*
1.4 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
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:
30: #include "libmdoc.h"
31:
1.10 kristaps 32: static u_char table[27 * 12];
1.6 kristaps 33:
1.11 kristaps 34: /*
35: * XXX - this hash has global scope, so if intended for use as a library
36: * with multiple callers, it will need re-invocation protection.
37: */
1.1 kristaps 38: void
1.9 kristaps 39: mdoc_hash_init(void)
1.1 kristaps 40: {
1.9 kristaps 41: int i, j, major;
42: const char *p;
1.1 kristaps 43:
1.9 kristaps 44: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 45:
1.5 kristaps 46: for (i = 0; i < MDOC_MAX; i++) {
1.9 kristaps 47: p = mdoc_macronames[i];
1.1 kristaps 48:
1.9 kristaps 49: if (isalpha((u_char)p[1]))
50: major = 12 * (tolower((u_char)p[1]) - 97);
51: else
52: major = 12 * 26;
53:
54: for (j = 0; j < 12; j++)
55: if (UCHAR_MAX == table[major + j]) {
1.10 kristaps 56: table[major + j] = (u_char)i;
1.9 kristaps 57: break;
58: }
1.1 kristaps 59:
1.9 kristaps 60: assert(j < 12);
1.1 kristaps 61: }
62: }
63:
64: int
1.9 kristaps 65: mdoc_hash_find(const char *p)
1.1 kristaps 66: {
1.9 kristaps 67: int major, i, j;
1.1 kristaps 68:
1.9 kristaps 69: if (0 == p[0])
1.6 kristaps 70: return(MDOC_MAX);
1.9 kristaps 71: if ( ! isalpha((u_char)p[0]) && '%' != p[0])
1.1 kristaps 72: return(MDOC_MAX);
1.6 kristaps 73:
1.9 kristaps 74: if (isalpha((u_char)p[1]))
75: major = 12 * (tolower((u_char)p[1]) - 97);
76: else if ('1' == p[1])
77: major = 12 * 26;
78: else
1.1 kristaps 79: return(MDOC_MAX);
80:
1.9 kristaps 81: if (p[2] && p[3])
1.1 kristaps 82: return(MDOC_MAX);
83:
1.9 kristaps 84: for (j = 0; j < 12; j++) {
85: if (UCHAR_MAX == (i = table[major + j]))
86: break;
87: if (0 == strcmp(p, mdoc_macronames[i]))
88: return(i);
1.1 kristaps 89: }
90:
91: return(MDOC_MAX);
92: }
CVSweb