Annotation of mandoc/man_hash.c, Revision 1.12
1.12 ! kristaps 1: /* $Id: man_hash.c,v 1.11 2009/08/19 09:14:50 kristaps Exp $ */
1.1 kristaps 2: /*
1.8 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
1.7 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: *
1.7 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: */
1.5 kristaps 17: #include <assert.h>
1.12 ! kristaps 18: #include <limits.h>
1.1 kristaps 19: #include <stdlib.h>
20: #include <string.h>
21:
22: #include "libman.h"
23:
1.5 kristaps 24:
1.12 ! kristaps 25: static unsigned char table[26 * 6];
1.1 kristaps 26:
27:
1.12 ! kristaps 28: void
! 29: man_hash_init(void)
1.1 kristaps 30: {
1.5 kristaps 31: int i, j, x;
32:
1.12 ! kristaps 33: memset(table, UCHAR_MAX, sizeof(table));
1.5 kristaps 34:
1.9 kristaps 35: for (i = 0; i < MAN_MAX; i++) {
1.5 kristaps 36: x = man_macronames[i][0];
37: assert((x >= 65 && x <= 90) ||
38: (x >= 97 && x <= 122));
39:
40: x -= (x <= 90) ? 65 : 97;
1.11 kristaps 41: x *= 6;
1.5 kristaps 42:
1.11 kristaps 43: for (j = 0; j < 6; j++)
1.12 ! kristaps 44: if (UCHAR_MAX == table[x + j]) {
! 45: table[x + j] = i;
1.5 kristaps 46: break;
47: }
1.11 kristaps 48: assert(j < 6);
1.5 kristaps 49: }
1.1 kristaps 50: }
51:
52:
53: int
1.12 ! kristaps 54: man_hash_find(const char *tmp)
1.1 kristaps 55: {
1.5 kristaps 56: int x, i, tok;
1.2 kristaps 57:
1.5 kristaps 58: if (0 == (x = tmp[0]))
59: return(MAN_MAX);
60: if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122)))
61: return(MAN_MAX);
62:
63: x -= (x <= 90) ? 65 : 97;
1.11 kristaps 64: x *= 6;
1.5 kristaps 65:
1.11 kristaps 66: for (i = 0; i < 6; i++) {
1.12 ! kristaps 67: if (UCHAR_MAX == (tok = table[x + i]))
1.5 kristaps 68: return(MAN_MAX);
69: if (0 == strcmp(tmp, man_macronames[tok]))
70: return(tok);
71: }
1.1 kristaps 72:
73: return(MAN_MAX);
74: }
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