-static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
-static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" };
+static const struct {
+ double bin_val;
+ double dec_val;
+ const char *bin_str;
+ const char *dec_str;
+} si_prefixes[] = {
+ { 1.0, 1.0, "", "" },
+ { 1.024e3, 1e3, "Ki", "K" },
+ { 1.048576e6, 1e6, "Mi", "M" },
+ { 1.073741824e9, 1e9, "Gi", "G" },
+ { 1.099511627776e12, 1e12, "Ti", "T" },
+ { 1.125899906842624e15, 1e15, "Pi", "P" },
+};