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/******************************************************************************
(c) 1999 Steve Whitehouse stevew@ACM.org
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdnet/dn.h>
#include <netdnet/dnetdb.h>
#include <ctype.h>
#include <string.h>
#include "dn_endian.h"
static __inline__ int do_digit(char *str, u_int16_t *addr, u_int16_t scale, size_t *pos, size_t len, int *started)
{
u_int16_t tmp = *addr / scale;
if (*pos == len)
return 1;
if (((tmp) > 0) || *started || (scale == 1)) {
*str = tmp + '0';
*started = 1;
(*pos)++;
*addr -= (tmp * scale);
}
return 0;
}
static const char *dnet_ntop1(const struct dn_naddr *dna, char *str, size_t len)
{
u_int16_t addr1;
u_int16_t addr;
u_int16_t area;
size_t pos = 0;
int started = 0;
memcpy(&addr1, dna->a_addr, sizeof(u_int16_t));
addr = dn_ntohs(addr1);
area = addr >> 10;
if (dna->a_len != 2)
return NULL;
addr &= 0x03ff;
if (len == 0)
return str;
if (do_digit(str + pos, &area, 10, &pos, len, &started))
return str;
if (do_digit(str + pos, &area, 1, &pos, len, &started))
return str;
if (pos == len)
return str;
*(str + pos) = '.';
pos++;
started = 0;
if (do_digit(str + pos, &addr, 1000, &pos, len, &started))
return str;
if (do_digit(str + pos, &addr, 100, &pos, len, &started))
return str;
if (do_digit(str + pos, &addr, 10, &pos, len, &started))
return str;
if (do_digit(str + pos, &addr, 1, &pos, len, &started))
return str;
if (pos == len)
return str;
*(str + pos) = 0;
return str;
}
const char *dnet_ntop(int af, const void *addr, char *str, size_t len)
{
switch(af) {
case AF_DECnet:
errno = 0;
return dnet_ntop1((struct dn_naddr *)addr, str, len);
default:
errno = EAFNOSUPPORT;
}
return NULL;
}
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