Annotation of mandoc/mdoc_hash.c, Revision 1.9
1.9 ! kristaps 1: /* $Id: mdoc_hash.c,v 1.8 2009/07/20 20:49:22 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: */
1.8 kristaps 17: #include <sys/types.h>
18:
1.1 kristaps 19: #include <assert.h>
20: #include <ctype.h>
1.9 ! kristaps 21: #include <limits.h>
1.1 kristaps 22: #include <stdlib.h>
23: #include <stdio.h>
24: #include <string.h>
25:
26: #include "libmdoc.h"
27:
1.9 ! kristaps 28: static unsigned char table[27 * 12];
1.6 kristaps 29:
1.1 kristaps 30:
31: void
1.9 ! kristaps 32: mdoc_hash_init(void)
1.1 kristaps 33: {
1.9 ! kristaps 34: int i, j, major;
! 35: const char *p;
1.1 kristaps 36:
1.9 ! kristaps 37: memset(table, UCHAR_MAX, sizeof(table));
1.1 kristaps 38:
1.5 kristaps 39: for (i = 0; i < MDOC_MAX; i++) {
1.9 ! kristaps 40: p = mdoc_macronames[i];
1.1 kristaps 41:
1.9 ! kristaps 42: if (isalpha((u_char)p[1]))
! 43: major = 12 * (tolower((u_char)p[1]) - 97);
! 44: else
! 45: major = 12 * 26;
! 46:
! 47: for (j = 0; j < 12; j++)
! 48: if (UCHAR_MAX == table[major + j]) {
! 49: table[major + j] = i;
! 50: break;
! 51: }
1.1 kristaps 52:
1.9 ! kristaps 53: assert(j < 12);
1.1 kristaps 54: }
55: }
56:
57:
58: int
1.9 ! kristaps 59: mdoc_hash_find(const char *p)
1.1 kristaps 60: {
1.9 ! kristaps 61: int major, i, j;
1.1 kristaps 62:
1.9 ! kristaps 63: if (0 == p[0])
1.6 kristaps 64: return(MDOC_MAX);
1.9 ! kristaps 65: if ( ! isalpha((u_char)p[0]) && '%' != p[0])
1.1 kristaps 66: return(MDOC_MAX);
1.6 kristaps 67:
1.9 ! kristaps 68: if (isalpha((u_char)p[1]))
! 69: major = 12 * (tolower((u_char)p[1]) - 97);
! 70: else if ('1' == p[1])
! 71: major = 12 * 26;
! 72: else
1.1 kristaps 73: return(MDOC_MAX);
74:
1.9 ! kristaps 75: if (p[2] && p[3])
1.1 kristaps 76: return(MDOC_MAX);
77:
1.9 ! kristaps 78: for (j = 0; j < 12; j++) {
! 79: if (UCHAR_MAX == (i = table[major + j]))
! 80: break;
! 81: if (0 == strcmp(p, mdoc_macronames[i]))
! 82: return(i);
1.1 kristaps 83: }
84:
85: return(MDOC_MAX);
86: }
87:
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