Annotation of mandoc/mdoc_hash.c, Revision 1.28
1.28 ! schwarze 1: /* $Id: mdoc_hash.c,v 1.27 2016/07/15 18:03:45 schwarze Exp $ */
1.1 kristaps 2: /*
1.16 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.28 ! schwarze 4: * Copyright (c) 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.3 kristaps 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: *
1.3 kristaps 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: */
1.12 kristaps 18: #include "config.h"
19:
1.8 kristaps 20: #include <sys/types.h>
21:
1.1 kristaps 22: #include <assert.h>
23: #include <ctype.h>
1.9 kristaps 24: #include <limits.h>
1.1 kristaps 25: #include <stdlib.h>
26: #include <stdio.h>
27: #include <string.h>
28:
1.27 schwarze 29: #include "mandoc.h"
1.22 schwarze 30: #include "roff.h"
1.17 kristaps 31: #include "mdoc.h"
1.27 schwarze 32: #include "libmandoc.h"
1.1 kristaps 33: #include "libmdoc.h"
34:
1.18 kristaps 35: static unsigned char table[27 * 12];
1.6 kristaps 36:
1.20 schwarze 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;
1.24 schwarze 43:
44: if (*table != '\0')
45: return;
1.1 kristaps 46:
1.9 kristaps 47: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 48:
1.28 ! schwarze 49: for (i = 0; i < (int)(MDOC_MAX - MDOC_Dd); i++) {
! 50: p = roff_name[MDOC_Dd + i];
1.1 kristaps 51:
1.18 kristaps 52: if (isalpha((unsigned char)p[1]))
53: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9 kristaps 54: else
55: major = 12 * 26;
56:
57: for (j = 0; j < 12; j++)
58: if (UCHAR_MAX == table[major + j]) {
1.18 kristaps 59: table[major + j] = (unsigned char)i;
1.9 kristaps 60: break;
61: }
1.1 kristaps 62:
1.9 kristaps 63: assert(j < 12);
1.1 kristaps 64: }
65: }
66:
1.28 ! schwarze 67: enum roff_tok
1.9 kristaps 68: mdoc_hash_find(const char *p)
1.1 kristaps 69: {
1.9 kristaps 70: int major, i, j;
1.1 kristaps 71:
1.9 kristaps 72: if (0 == p[0])
1.26 schwarze 73: return TOKEN_NONE;
1.18 kristaps 74: if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.26 schwarze 75: return TOKEN_NONE;
1.6 kristaps 76:
1.18 kristaps 77: if (isalpha((unsigned char)p[1]))
78: major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9 kristaps 79: else if ('1' == p[1])
80: major = 12 * 26;
1.20 schwarze 81: else
1.26 schwarze 82: return TOKEN_NONE;
1.1 kristaps 83:
1.9 kristaps 84: if (p[2] && p[3])
1.26 schwarze 85: return TOKEN_NONE;
1.1 kristaps 86:
1.9 kristaps 87: for (j = 0; j < 12; j++) {
88: if (UCHAR_MAX == (i = table[major + j]))
89: break;
1.28 ! schwarze 90: if (strcmp(p, roff_name[MDOC_Dd + i]) == 0)
! 91: return MDOC_Dd + i;
1.1 kristaps 92: }
93:
1.26 schwarze 94: return TOKEN_NONE;
1.1 kristaps 95: }
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