fmt_ip4 - write a formatted ASCII representation of an IPv4 number

       fmt_ip4  formats an IPv4 number in dotted-decimal ASCII representation from ip and writes the result into
       dest. It returns the number of bytes written.

       If dest equals FMT_LEN (i.e. is zero), fmt_ip4 returns the number of bytes it would have written.

       fmt_ip4 does not append \0.

       For convenience, ip4.h defines the integer IP4_FMT to be big enough to  contain  every  possible  fmt_ip4
       output plus \0.

       #include <libowfat/ip4.h>

         char buf[IP4_FMT];
         char ip[4];
         buf[fmt_ip4(buf,ip)]=0;

       fmt_ip4 - write a formatted ASCII representation of an IPv4 number

scan_ip4(3), fmt_ip6(3), inet_ntop(3)

                                                                                                      fmt_ip4(3)

#include<libowfat/ip4.h>

       unsigned int fmt_ip4(char *dest,const char ip[4]);