eaytest.tproj/str2val.c

   1 /*      $KAME: str2val.c,v 1.10 2001/04/03 15:51:57 thorpej Exp $       */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <ctype.h>
  35
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38
  39 #include "str2val.h"
  40 #include "gcmalloc.h"
  41
  42 /*
  43  * exchange a value to a hex string.
  44  * must free buffer allocated later.
  45  */
  46 caddr_t
  47 val2str(buf, mlen)
  48         const char *buf;
  49         size_t mlen;
  50 {
  51         caddr_t new;
  52         size_t len = (mlen * 2) + mlen / 8 + 10;
  53         size_t i, j;
  54
  55         if ((new = racoon_malloc(len)) == 0) return(0);
  56
  57         for (i = 0, j = 0; i < mlen; i++) {
  58                 snprintf(&new[j], len - j, "%02x", (u_char)buf[i]);
  59                 j += 2;
  60                 if (i % 8 == 7) {
  61                         new[j++] = ' ';
  62                         new[j] = '\0';
  63                 }
  64         }
  65         new[j] = '\0';
  66
  67         return(new);
  68 }
  69
  70 /*
  71  * exchange a string based "base" to a value.
  72  */
  73 char *
  74 str2val(str, base, len)
  75         const char *str;
  76         int base;
  77         size_t *len;
  78 {
  79         int f;
  80         size_t i;
  81         char *dst;
  82         char *rp;
  83         const char *p;
  84         char b[3];
  85
  86         i = 0;
  87         for (p = str; *p != '\0'; p++) {
  88                 if (isxdigit(*p))
  89                         i++;
  90                 else if (isspace(*p))
  91                         ;
  92                 else
  93                         return NULL;
  94         }
  95         if (i == 0 || (i % 2) != 0)
  96                 return NULL;
  97         i /= 2;
  98
  99         if ((dst = racoon_malloc(i)) == NULL)
 100                 return NULL;
 101
 102         i = 0;
 103         f = 0;
 104         for (rp = dst, p = str; *p != '\0'; p++) {
 105                 if (isxdigit(*p)) {
 106                         if (!f) {
 107                                 b[0] = *p;
 108                                 f = 1;
 109                         } else {
 110                                 b[1] = *p;
 111                                 b[2] = '\0';
 112                                 *rp++ = (char)strtol(b, NULL, base);
 113                                 i++;
 114                                 f = 0;
 115                         }
 116                 }
 117         }
 118
 119         *len = i;
 120
 121         return(dst);
 122 }