Annotation of src/usr.bin/mandoc/mdoc_hash.c, Revision 1.18
1.18 ! schwarze 1: /* $OpenBSD: mdoc_hash.c,v 1.17 2015/04/02 21:03:18 schwarze Exp $ */
1.1 kristaps 2: /*
1.11 schwarze 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
1.2 schwarze 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: *
1.2 schwarze 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: */
1.5 schwarze 17: #include <sys/types.h>
18:
1.1 kristaps 19: #include <assert.h>
20: #include <ctype.h>
1.6 schwarze 21: #include <limits.h>
1.1 kristaps 22: #include <stdlib.h>
23: #include <stdio.h>
24: #include <string.h>
25:
1.17 schwarze 26: #include "roff.h"
1.12 schwarze 27: #include "mdoc.h"
1.1 kristaps 28: #include "libmdoc.h"
29:
1.13 schwarze 30: static unsigned char table[27 * 12];
1.1 kristaps 31:
1.15 schwarze 32:
1.6 schwarze 33: /*
34: * XXX - this hash has global scope, so if intended for use as a library
35: * with multiple callers, it will need re-invocation protection.
36: */
1.1 kristaps 37: void
1.6 schwarze 38: mdoc_hash_init(void)
1.1 kristaps 39: {
1.6 schwarze 40: int i, j, major;
41: const char *p;
1.1 kristaps 42:
1.6 schwarze 43: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 44:
1.9 schwarze 45: for (i = 0; i < (int)MDOC_MAX; i++) {
1.6 schwarze 46: p = mdoc_macronames[i];
1.1 kristaps 47:
1.13 schwarze 48: if (isalpha((unsigned char)p[1]))
49: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6 schwarze 50: else
1.13 schwarze 51: major = 12 * 26;
1.6 schwarze 52:
1.13 schwarze 53: for (j = 0; j < 12; j++)
1.6 schwarze 54: if (UCHAR_MAX == table[major + j]) {
1.13 schwarze 55: table[major + j] = (unsigned char)i;
1.6 schwarze 56: break;
57: }
1.1 kristaps 58:
1.13 schwarze 59: assert(j < 12);
1.1 kristaps 60: }
61: }
62:
1.18 ! schwarze 63: int
1.6 schwarze 64: mdoc_hash_find(const char *p)
1.1 kristaps 65: {
1.6 schwarze 66: int major, i, j;
1.1 kristaps 67:
1.6 schwarze 68: if (0 == p[0])
1.1 kristaps 69: return(MDOC_MAX);
1.13 schwarze 70: if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.4 schwarze 71: return(MDOC_MAX);
72:
1.13 schwarze 73: if (isalpha((unsigned char)p[1]))
74: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6 schwarze 75: else if ('1' == p[1])
1.13 schwarze 76: major = 12 * 26;
1.15 schwarze 77: else
1.1 kristaps 78: return(MDOC_MAX);
79:
1.6 schwarze 80: if (p[2] && p[3])
1.1 kristaps 81: return(MDOC_MAX);
82:
1.13 schwarze 83: for (j = 0; j < 12; j++) {
1.6 schwarze 84: if (UCHAR_MAX == (i = table[major + j]))
85: break;
86: if (0 == strcmp(p, mdoc_macronames[i]))
1.18 ! schwarze 87: return(i);
1.1 kristaps 88: }
89:
90: return(MDOC_MAX);
91: }