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Annotation of src/usr.bin/mandoc/man_hash.c, Revision 1.2

1.2     ! schwarze    1: /*     $Id: man_hash.c,v 1.8 2009/06/10 20:18:43 kristaps 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:
                     40:        htab = calloc(26 * 5, sizeof(int));
                     41:        if (NULL == htab)
                     42:                return(NULL);
                     43:
                     44:        for (i = 1; i < MAN_MAX; i++) {
                     45:                x = man_macronames[i][0];
                     46:
                     47:                assert((x >= 65 && x <= 90) ||
                     48:                                (x >= 97 && x <= 122));
                     49:
                     50:                x -= (x <= 90) ? 65 : 97;
                     51:                x *= 5;
                     52:
                     53:                for (j = 0; j < 5; j++)
                     54:                        if (0 == htab[x + j]) {
                     55:                                htab[x + j] = i;
                     56:                                break;
                     57:                        }
                     58:
                     59:                assert(j < 5);
                     60:        }
                     61:
                     62:        return((void *)htab);
                     63: }
                     64:
                     65:
                     66: int
                     67: man_hash_find(const void *arg, const char *tmp)
                     68: {
                     69:        int              x, i, tok;
                     70:        const int       *htab;
                     71:
                     72:        htab = (const int *)arg;
                     73:
                     74:        if (0 == (x = tmp[0]))
                     75:                return(MAN_MAX);
                     76:        if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122)))
                     77:                return(MAN_MAX);
                     78:
                     79:        x -= (x <= 90) ? 65 : 97;
                     80:        x *= 5;
                     81:
                     82:        for (i = 0; i < 5; i++) {
                     83:                if (0 == (tok = htab[x + i]))
                     84:                        return(MAN_MAX);
                     85:                if (0 == strcmp(tmp, man_macronames[tok]))
                     86:                        return(tok);
                     87:        }
                     88:
                     89:        return(MAN_MAX);
                     90: }
                     91: