/*      $NetBSD: str2val.c,v 1.5 2025/03/07 15:55:30 christos Exp $     */

/*      $KAME: str2val.c,v 1.11 2001/08/16 14:37:29 itojun Exp $        */

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * 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 project 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 PROJECT 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 PROJECT 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 "config.h"

#include <sys/types.h>
#include <sys/param.h>
#include <ctype.h>

#include <stdlib.h>
#include <stdio.h>

#include "str2val.h"
#include "gcmalloc.h"

/*
 * exchange a value to a hex string.
 * must free buffer allocated later.
 */
caddr_t
val2str(const char *buf, size_t mlen)
{
        caddr_t new;
        size_t len = (mlen * 2) + mlen / 8 + 10;
        size_t i, j;

        if ((new = racoon_malloc(len)) == 0) return(0);

        for (i = 0, j = 0; i < mlen; i++) {
                snprintf(&new[j], len - j, "%02x", (u_char)buf[i]);
                j += 2;
                if (i % 8 == 7) {
                        new[j++] = ' ';
                        new[j] = '\0';
                }
        }
        new[j] = '\0';

        return(new);
}

/*
 * exchange a string based "base" to a value.
 */
char *
str2val(const char *str, int base, size_t *len)
{
        int f;
        size_t i;
        char *dst;
        char *rp;
        const char *p;
        char b[3];

        i = 0;
        for (p = str; *p != '\0'; p++) {
                if (isxdigit((unsigned char)*p))
                        i++;
                else if (isspace((unsigned char)*p))
                        ;
                else
                        return NULL;
        }
        if (i == 0 || (i % 2) != 0)
                return NULL;
        i /= 2;

        if ((dst = racoon_malloc(i)) == NULL)
                return NULL;

        i = 0;
        f = 0;
        for (rp = dst, p = str; *p != '\0'; p++) {
                if (isxdigit((unsigned char)*p)) {
                        if (!f) {
                                b[0] = *p;
                                f = 1;
                        } else {
                                b[1] = *p;
                                b[2] = '\0';
                                *rp++ = (char)strtol(b, NULL, base);
                                i++;
                                f = 0;
                        }
                }
        }

        *len = i;

        return(dst);
}