1 files changed, 13 insertions, 0 deletions
diff --git a/Util.cs b/Util.cs
index 9cbccdf..31a2e84 100644
--- a/Util.cs
+++ b/Util.cs
@@ -1,8 +1,21 @@
 namespace HyperBooru.Util;
 
 public static class Extensions {
+    public static readonly string[] MagnitudeOrders = new[] {
+        "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"
+    };
+
     public static DateTime? TryParseDateTimeUtc(this string s) {
         bool success = DateTime.TryParse(s, out var dateTime);
         return success ? DateTime.SpecifyKind(dateTime, DateTimeKind.Utc) : null;
     }
+
+    public static string ToBytesSI(this long x) {
+        var exp = (int) Math.Log10(x);
+        var suffix = MagnitudeOrders.ElementAtOrDefault(exp / 3 - 1);
+        if(suffix is null)
+            return x.ToString();
+        double n = x / Math.Pow(10, exp / 3 * 3);
+        return $"{Math.Round(n, 2 - (exp % 3))} {suffix}B";
+    }
 }