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29 lines
571 B
C

#include "fmt.h"
unsigned int fmt_human(char* dest,unsigned long long l) {
char unit;
int i;
if (l<1000) return fmt_ulong(dest,l);
if (l>1000000000000ull) {
/* dang! overflow! */
l/=1000;
l=(l+50000000)/100000000;
unit='T';
} else if (l>1000000000) {
l=(l+50000000)/100000000;
unit='G';
} else if (l>1000000) {
l=(l+50000)/100000;
unit='M';
} else {
l=(l+50)/100;
unit='k';
}
if (!dest) return fmt_ulong(0,l)+2;
i=fmt_ulong(dest,l/10);
dest[i]='.';
dest[i+1]=(l%10)+'0';
dest[i+2]=unit;
return i+3;
}