Annotation of src/usr.bin/mandoc/mdoc_hash.c, Revision 1.22
1.22 ! schwarze 1: /* $OpenBSD: mdoc_hash.c,v 1.21 2015/10/06 18:30:44 schwarze Exp $ */
1.1 kristaps 2: /*
1.11 schwarze 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.21 schwarze 4: * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.2 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.5 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
21: #include <ctype.h>
1.6 schwarze 22: #include <limits.h>
1.1 kristaps 23: #include <stdlib.h>
24: #include <stdio.h>
25: #include <string.h>
26:
1.22 ! schwarze 27: #include "mandoc.h"
1.17 schwarze 28: #include "roff.h"
1.12 schwarze 29: #include "mdoc.h"
1.22 ! schwarze 30: #include "libmandoc.h"
1.1 kristaps 31: #include "libmdoc.h"
32:
1.13 schwarze 33: static unsigned char table[27 * 12];
1.1 kristaps 34:
1.15 schwarze 35:
1.1 kristaps 36: void
1.6 schwarze 37: mdoc_hash_init(void)
1.1 kristaps 38: {
1.6 schwarze 39: int i, j, major;
40: const char *p;
1.19 schwarze 41:
42: if (*table != '\0')
43: return;
1.1 kristaps 44:
1.6 schwarze 45: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 46:
1.9 schwarze 47: for (i = 0; i < (int)MDOC_MAX; i++) {
1.6 schwarze 48: p = mdoc_macronames[i];
1.1 kristaps 49:
1.13 schwarze 50: if (isalpha((unsigned char)p[1]))
51: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6 schwarze 52: else
1.13 schwarze 53: major = 12 * 26;
1.6 schwarze 54:
1.13 schwarze 55: for (j = 0; j < 12; j++)
1.6 schwarze 56: if (UCHAR_MAX == table[major + j]) {
1.13 schwarze 57: table[major + j] = (unsigned char)i;
1.6 schwarze 58: break;
59: }
1.1 kristaps 60:
1.13 schwarze 61: assert(j < 12);
1.1 kristaps 62: }
63: }
64:
1.18 schwarze 65: int
1.6 schwarze 66: mdoc_hash_find(const char *p)
1.1 kristaps 67: {
1.6 schwarze 68: int major, i, j;
1.1 kristaps 69:
1.6 schwarze 70: if (0 == p[0])
1.21 schwarze 71: return TOKEN_NONE;
1.13 schwarze 72: if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.21 schwarze 73: return TOKEN_NONE;
1.4 schwarze 74:
1.13 schwarze 75: if (isalpha((unsigned char)p[1]))
76: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6 schwarze 77: else if ('1' == p[1])
1.13 schwarze 78: major = 12 * 26;
1.15 schwarze 79: else
1.21 schwarze 80: return TOKEN_NONE;
1.1 kristaps 81:
1.6 schwarze 82: if (p[2] && p[3])
1.21 schwarze 83: return TOKEN_NONE;
1.1 kristaps 84:
1.13 schwarze 85: for (j = 0; j < 12; j++) {
1.6 schwarze 86: if (UCHAR_MAX == (i = table[major + j]))
87: break;
88: if (0 == strcmp(p, mdoc_macronames[i]))
1.21 schwarze 89: return i;
1.1 kristaps 90: }
91:
1.21 schwarze 92: return TOKEN_NONE;
1.1 kristaps 93: }