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#include <stdio.h>
/* Convert an amount of bytes into a human readable string in the form
* of 100B, 2G, 100M, 4K, and so forth. */
void bytesToHuman(char *s, long long n) {
double d;
if (n < 0) {
*s = '-';
s++;
n = -n;
}
if (n < 1024) {
/* Bytes */
sprintf(s,"%lluB",n);
return;
} else if (n < (1024*1024)) {
d = (double)n/(1024);
sprintf(s,"%.2fK",d);
} else if (n < (1024LL*1024*1024)) {
d = (double)n/(1024*1024);
sprintf(s,"%.2fM",d);
} else if (n < (1024LL*1024*1024*1024)) {
d = (double)n/(1024LL*1024*1024);
sprintf(s,"%.2fG",d);
}
}