/*
 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "der_locl.h"
#include <com_err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getarg.h>
#include <err.h>

RCSID("$Id$");


static const char *class_names[] = {
    "UNIV",                     /* 0 */
    "APPL",                     /* 1 */
    "CONTEXT",                  /* 2 */
    "PRIVATE"                   /* 3 */
};

static const char *type_names[] = {
    "PRIM",                     /* 0 */
    "CONS"                      /* 1 */
};

static const char *tag_names[] = {
    "EndOfContent",             /* 0 */
    "Boolean",                  /* 1 */
    "Integer",                  /* 2 */
    "BitString",                /* 3 */
    "OctetString",              /* 4 */
    "Null",                     /* 5 */
    "ObjectID",                 /* 6 */
    NULL,                       /* 7 */
    NULL,                       /* 8 */
    NULL,                       /* 9 */
    "Enumerated",               /* 10 */
    NULL,                       /* 11 */
    NULL,                       /* 12 */
    NULL,                       /* 13 */
    NULL,                       /* 14 */
    NULL,                       /* 15 */
    "Sequence",                 /* 16 */
    "Set",                      /* 17 */
    NULL,                       /* 18 */
    "PrintableString",          /* 19 */
    NULL,                       /* 20 */
    NULL,                       /* 21 */
    "IA5String",                /* 22 */
    "UTCTime",                  /* 23 */
    "GeneralizedTime",          /* 24 */
    NULL,                       /* 25 */
    "VisibleString",            /* 26 */
    "GeneralString",            /* 27 */
    NULL,                       /* 28 */
    NULL,                       /* 29 */
    "BMPString"                 /* 30 */
};

static int
get_type(const char *name, const char *list[], unsigned len)
{
    unsigned i;
    for (i = 0; i < len; i++)
        if (list[i] && strcasecmp(list[i], name) == 0)
            return i;
    return -1;
}

#define SIZEOF_ARRAY(a) (sizeof((a))/sizeof((a)[0]))

const char *
der_get_class_name(unsigned num)
{
    if (num >= SIZEOF_ARRAY(class_names))
        return NULL;
    return class_names[num];
}

int
der_get_class_num(const char *name)
{
    return get_type(name, class_names, SIZEOF_ARRAY(class_names));
}

const char *
der_get_type_name(unsigned num)
{
    if (num >= SIZEOF_ARRAY(type_names))
        return NULL;
    return type_names[num];
}

int
der_get_type_num(const char *name)
{
    return get_type(name, type_names, SIZEOF_ARRAY(type_names));
}

const char *
der_get_tag_name(unsigned num)
{
    if (num >= SIZEOF_ARRAY(tag_names))
        return NULL;
    return tag_names[num];
}

int
der_get_tag_num(const char *name)
{
    return get_type(name, tag_names, SIZEOF_ARRAY(tag_names));
}