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305 B

#include "fmt.h"
#include "ip4.h"
unsigned int fmt_ip4(char *s,const char ip[4])
unsigned int len;
int i;
len = 0;
for (i=0; i<4; ++i) {
register unsigned int j;
len+=(j=fmt_ulong(s,(unsigned long) (unsigned char) ip[i]))+1;
if (s && i<3) { s+=j; *s++='.'; }
return len-1;