varnish-cache/bin/varnishd/hash/mgt_hash.c
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/*-
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 * Copyright (c) 2006 Verdens Gang AS
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 * Copyright (c) 2006-2011 Varnish Software AS
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 * All rights reserved.
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 *
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 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 */
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "mgt/mgt.h"
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#include "common/heritage.h"
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#include "hash/hash_slinger.h"
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#include "vav.h"
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static const struct choice hsh_choice[] = {
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        { "classic",            &hcl_slinger },
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        { "simple",             &hsl_slinger },
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        { "simple_list",        &hsl_slinger }, /* backwards compat */
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        { "critbit",            &hcb_slinger },
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        { NULL,                 NULL }
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};
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/*--------------------------------------------------------------------*/
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void
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HSH_config(const char *h_arg)
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{
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        char **av;
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        int ac;
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        const struct hash_slinger *hp;
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        ASSERT_MGT();
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        av = VAV_Parse(h_arg, NULL, ARGV_COMMA);
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        AN(av);
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        if (av[0] != NULL)
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                ARGV_ERR("%s\n", av[0]);
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        if (av[1] == NULL)
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                ARGV_ERR("-h argument is empty\n");
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        for (ac = 0; av[ac + 2] != NULL; ac++)
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                continue;
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        hp = MGT_Pick(hsh_choice, av[1], "hash");
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        CHECK_OBJ_NOTNULL(hp, SLINGER_MAGIC);
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        VSB_printf(vident, ",-h%s", av[1]);
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        heritage.hash = hp;
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        if (hp->init != NULL)
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                hp->init(ac, av + 2);
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        else if (ac > 0)
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                ARGV_ERR("Hash method \"%s\" takes no arguments\n",
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                    hp->name);
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        /* NB: Don't free av, the hasher is allowed to keep it. */
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}