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/* $Id: */
/* Copyright 1998 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#include "setup.h"
#include <sys/types.h>
#if defined(WIN32) && !defined(WATT32)
#include "nameser.h"
#else
#include <netinet/in.h>
#include <arpa/nameser.h>
#endif
#include <string.h>
#include <stdlib.h>
#include "ares.h"
#include "ares_private.h" /* for the memdebug */
/* Simply decodes a length-encoded character string. The first byte of the
* input is the length of the string to be returned and the bytes thereafter
* are the characters of the string. The returned result will be NULL
* terminated.
*/
int ares_expand_string(const unsigned char *encoded,
const unsigned char *abuf,
int alen,
unsigned char **s,
long *enclen)
{
unsigned char *q;
long len;
if (encoded == abuf+alen)
return ARES_EBADSTR;
len = *encoded;
if (encoded+len+1 > abuf+alen)
return ARES_EBADSTR;
encoded++;
*s = malloc(len+1);
if (*s == NULL)
return ARES_ENOMEM;
q = *s;
strncpy((char *)q, (char *)encoded, len);
q[len] = '\0';
*s = q;
*enclen = len+1;
return ARES_SUCCESS;
}
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