Annotation of mandoc/man_hash.c, Revision 1.10
1.10 ! kristaps 1: /* $Id: man_hash.c,v 1.9 2009/06/16 19:55:28 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>
1.1 kristaps 18: #include <stdlib.h>
19: #include <string.h>
20:
21: #include "libman.h"
22:
1.5 kristaps 23:
1.1 kristaps 24: /* ARGUSED */
25: void
26: man_hash_free(void *htab)
27: {
28:
1.5 kristaps 29: free(htab);
1.1 kristaps 30: }
31:
32:
33: /* ARGUSED */
34: void *
35: man_hash_alloc(void)
36: {
1.5 kristaps 37: int *htab;
38: int i, j, x;
39:
1.10 ! kristaps 40: /* Initialised to -1. */
! 41:
! 42: htab = malloc(26 * 5 * sizeof(int));
1.5 kristaps 43: if (NULL == htab)
44: return(NULL);
1.10 ! kristaps 45: for (i = 0; i < 26 * 5; i++)
! 46: htab[i] = -1;
1.5 kristaps 47:
1.9 kristaps 48: for (i = 0; i < MAN_MAX; i++) {
1.5 kristaps 49: x = man_macronames[i][0];
50:
51: assert((x >= 65 && x <= 90) ||
52: (x >= 97 && x <= 122));
53:
54: x -= (x <= 90) ? 65 : 97;
1.6 kristaps 55: x *= 5;
1.5 kristaps 56:
1.6 kristaps 57: for (j = 0; j < 5; j++)
1.10 ! kristaps 58: if (-1 == htab[x + j]) {
1.5 kristaps 59: htab[x + j] = i;
60: break;
61: }
62:
1.6 kristaps 63: assert(j < 5);
1.5 kristaps 64: }
1.1 kristaps 65:
1.5 kristaps 66: return((void *)htab);
1.1 kristaps 67: }
68:
69:
70: int
71: man_hash_find(const void *arg, const char *tmp)
72: {
1.5 kristaps 73: int x, i, tok;
74: const int *htab;
1.1 kristaps 75:
1.5 kristaps 76: htab = (const int *)arg;
1.2 kristaps 77:
1.5 kristaps 78: if (0 == (x = tmp[0]))
79: return(MAN_MAX);
80: if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122)))
81: return(MAN_MAX);
82:
83: x -= (x <= 90) ? 65 : 97;
1.6 kristaps 84: x *= 5;
1.5 kristaps 85:
1.6 kristaps 86: for (i = 0; i < 5; i++) {
1.10 ! kristaps 87: if (-1 == (tok = htab[x + i]))
1.5 kristaps 88: return(MAN_MAX);
89: if (0 == strcmp(tmp, man_macronames[tok]))
90: return(tok);
91: }
1.1 kristaps 92:
93: return(MAN_MAX);
94: }
95:
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