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Annotation of src/usr.bin/mandoc/man_hash.c, Revision 1.1

1.1     ! kristaps    1: /* $Id: man_hash.c,v 1.6 2009/04/05 16:34:22 kristaps Exp $ */
        !             2: /*
        !             3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
        !             4:  *
        !             5:  * Permission to use, copy, modify, and distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the
        !             7:  * above copyright notice and this permission notice appear in all
        !             8:  * copies.
        !             9:  *
        !            10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
        !            11:  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
        !            12:  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
        !            13:  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
        !            14:  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
        !            15:  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
        !            16:  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
        !            17:  * PERFORMANCE OF THIS SOFTWARE.
        !            18:  */
        !            19: #include <assert.h>
        !            20: #include <stdlib.h>
        !            21: #include <string.h>
        !            22:
        !            23: #include "libman.h"
        !            24:
        !            25:
        !            26: /* ARGUSED */
        !            27: void
        !            28: man_hash_free(void *htab)
        !            29: {
        !            30:
        !            31:        free(htab);
        !            32: }
        !            33:
        !            34:
        !            35: /* ARGUSED */
        !            36: void *
        !            37: man_hash_alloc(void)
        !            38: {
        !            39:        int             *htab;
        !            40:        int              i, j, x;
        !            41:
        !            42:        htab = calloc(26 * 5, sizeof(int));
        !            43:        if (NULL == htab)
        !            44:                return(NULL);
        !            45:
        !            46:        for (i = 1; i < MAN_MAX; i++) {
        !            47:                x = man_macronames[i][0];
        !            48:
        !            49:                assert((x >= 65 && x <= 90) ||
        !            50:                                (x >= 97 && x <= 122));
        !            51:
        !            52:                x -= (x <= 90) ? 65 : 97;
        !            53:                x *= 5;
        !            54:
        !            55:                for (j = 0; j < 5; j++)
        !            56:                        if (0 == htab[x + j]) {
        !            57:                                htab[x + j] = i;
        !            58:                                break;
        !            59:                        }
        !            60:
        !            61:                assert(j < 5);
        !            62:        }
        !            63:
        !            64:        return((void *)htab);
        !            65: }
        !            66:
        !            67:
        !            68: int
        !            69: man_hash_find(const void *arg, const char *tmp)
        !            70: {
        !            71:        int              x, i, tok;
        !            72:        const int       *htab;
        !            73:
        !            74:        htab = (const int *)arg;
        !            75:
        !            76:        if (0 == (x = tmp[0]))
        !            77:                return(MAN_MAX);
        !            78:        if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122)))
        !            79:                return(MAN_MAX);
        !            80:
        !            81:        x -= (x <= 90) ? 65 : 97;
        !            82:        x *= 5;
        !            83:
        !            84:        for (i = 0; i < 5; i++) {
        !            85:                if (0 == (tok = htab[x + i]))
        !            86:                        return(MAN_MAX);
        !            87:                if (0 == strcmp(tmp, man_macronames[tok]))
        !            88:                        return(tok);
        !            89:        }
        !            90:
        !            91:        return(MAN_MAX);
        !            92: }
        !            93: