uclibc-ng/libc/inet/addr.c

/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
 * This file is part of the Linux-8086 C library and is distributed
 * under the GNU Library General Public License.
 */

#include <string.h>
#include <ctype.h>
#include <netinet/in.h>

int inet_aton(const char *cp, struct in_addr *inp);

#ifdef L_inet_aton
int
inet_aton(cp, inp)
const char *cp;
struct in_addr *inp;
{
  unsigned long addr;
  int value;
  int part;

  if (!inp)
    return 0;
  
  addr = 0;
  for (part=1;part<=4;part++) {

    if (!isdigit(*cp))
      return 0;
        
    value = 0;
    while (isdigit(*cp)) {
      value *= 10;
      value += *cp++ - '0';
      if (value > 255)
        return 0;
    }
    
    if (*cp++ != ((part == 4) ? '\0' : '.'))
      return 0;
    
    addr <<= 8;
    addr |= value;
  }
  
  inp->s_addr = htonl(addr);

  return 1;
}
#endif

#ifdef L_inet_addr
unsigned long
inet_addr(cp)
const char *cp;
{
  struct in_addr a;
  if (!inet_aton(cp, &a))
    return -1;
  else
    return a.s_addr;
}
#endif

#ifdef L_inet_ntoa

extern char * itoa(int);  

char *
inet_ntoa(in)
struct in_addr in;
{
  static char buf[18];
  unsigned long addr = ntohl(in.s_addr);
  
  strcpy(buf, itoa((addr >> 24) & 0xff));
  strcat(buf, ".");
  strcat(buf, itoa((addr >> 16) & 0xff));
  strcat(buf, ".");
  strcat(buf, itoa((addr >> 8) & 0xff));
  strcat(buf, ".");
  strcat(buf, itoa(addr & 0xff));
  
  return buf;
}
#endif