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Annotation of src/usr.bin/mandoc/man_hash.c, Revision 1.5

1.5     ! schwarze    1: /*     $Id: man_hash.c,v 1.4 2009/06/23 22:43:30 schwarze Exp $ */
1.1       kristaps    2: /*
1.2       schwarze    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
1.2       schwarze    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:  *
1.2       schwarze    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:  */
                     17: #include <assert.h>
                     18: #include <stdlib.h>
                     19: #include <string.h>
                     20:
                     21: #include "libman.h"
                     22:
                     23:
                     24: /* ARGUSED */
                     25: void
                     26: man_hash_free(void *htab)
                     27: {
                     28:
                     29:        free(htab);
                     30: }
                     31:
                     32:
                     33: /* ARGUSED */
                     34: void *
                     35: man_hash_alloc(void)
                     36: {
                     37:        int             *htab;
                     38:        int              i, j, x;
                     39:
1.4       schwarze   40:        /* Initialised to -1. */
                     41:
1.5     ! schwarze   42:        htab = malloc(26 * 6 * sizeof(int));
1.1       kristaps   43:        if (NULL == htab)
                     44:                return(NULL);
1.5     ! schwarze   45:        for (i = 0; i < 26 * 6; i++)
1.4       schwarze   46:                htab[i] = -1;
1.1       kristaps   47:
1.3       schwarze   48:        for (i = 0; i < MAN_MAX; i++) {
1.1       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;
1.5     ! schwarze   55:                x *= 6;
1.1       kristaps   56:
1.5     ! schwarze   57:                for (j = 0; j < 6; j++)
1.4       schwarze   58:                        if (-1 == htab[x + j]) {
1.1       kristaps   59:                                htab[x + j] = i;
                     60:                                break;
                     61:                        }
                     62:
1.5     ! schwarze   63:                assert(j < 6);
1.1       kristaps   64:        }
                     65:
                     66:        return((void *)htab);
                     67: }
                     68:
                     69:
                     70: int
                     71: man_hash_find(const void *arg, const char *tmp)
                     72: {
                     73:        int              x, i, tok;
                     74:        const int       *htab;
                     75:
                     76:        htab = (const int *)arg;
                     77:
                     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;
1.5     ! schwarze   84:        x *= 6;
1.1       kristaps   85:
1.5     ! schwarze   86:        for (i = 0; i < 6; i++) {
1.4       schwarze   87:                if (-1 == (tok = htab[x + i]))
1.1       kristaps   88:                        return(MAN_MAX);
                     89:                if (0 == strcmp(tmp, man_macronames[tok]))
                     90:                        return(tok);
                     91:        }
                     92:
                     93:        return(MAN_MAX);
                     94: }
                     95: