1 #include <sys/socket.h>
2 #include <netinet/in.h>
9 const char *inet_ntop(int af, const void *a0, char *s, socklen_t l)
11 const unsigned char *a = a0;
17 if (snprintf(s, l, "%d.%d.%d.%d", a[0],a[1],a[2],a[3]) < l)
21 memset(buf, 'x', sizeof buf);
23 snprintf(buf, sizeof buf,
24 "%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x:%.0x%x",
25 a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],
26 a[8],a[9],a[10],a[11],a[12],a[13],a[14],a[15]);
27 /* Replace longest /(^0|:)[:0]{2,}/ with "::" */
28 for (i=best=0, max=2; buf[i]; i++) {
29 if (i && buf[i] != ':') continue;
30 j = strspn(buf+i, ":0");
31 if (j>max) best=i, max=j;
34 buf[best] = buf[best+1] = ':';
35 strcpy(buf+best+2, buf+best+max);
37 if (strlen(buf) < l) {