1 #include <sys/socket.h>
7 const char *inet_ntop(int af, const void *restrict a0, char *restrict s, socklen_t l)
9 const unsigned char *a = a0;
15 if (snprintf(s, l, "%d.%d.%d.%d", a[0],a[1],a[2],a[3]) < l)
19 if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\377\377", 12))
20 snprintf(buf, sizeof buf,
21 "%x:%x:%x:%x:%x:%x:%x:%x",
22 256*a[0]+a[1],256*a[2]+a[3],
23 256*a[4]+a[5],256*a[6]+a[7],
24 256*a[8]+a[9],256*a[10]+a[11],
25 256*a[12]+a[13],256*a[14]+a[15]);
27 snprintf(buf, sizeof buf,
28 "%x:%x:%x:%x:%x:%x:%d.%d.%d.%d",
29 256*a[0]+a[1],256*a[2]+a[3],
30 256*a[4]+a[5],256*a[6]+a[7],
31 256*a[8]+a[9],256*a[10]+a[11],
32 a[12],a[13],a[14],a[15]);
33 /* Replace longest /(^0|:)[:0]{2,}/ with "::" */
34 for (i=best=0, max=2; buf[i]; i++) {
35 if (i && buf[i] != ':') continue;
36 j = strspn(buf+i, ":0");
37 if (j>max) best=i, max=j;
40 buf[best] = buf[best+1] = ':';
41 memmove(buf+best+2, buf+best+max, i-best-max+1);
43 if (strlen(buf) < l) {