Move codepointToString to Strings

1 files changed, 9 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/mammoth/internal/util/Strings.java b/src/main/java/org/zwobble/mammoth/internal/util/Strings.java
index f39f35e..fad42a6 100644
--- a/src/main/java/org/zwobble/mammoth/internal/util/Strings.java
+++ b/src/main/java/org/zwobble/mammoth/internal/util/Strings.java
@@ -16,4 +16,13 @@ public class Strings {
     public static boolean startsWithIgnoreCase(String value, String prefix) {
         return value.regionMatches(true, 0, prefix, 0, prefix.length());
     }
+
+    public static String codepointToString(int codePoint) {
+        if (Character.isBmpCodePoint(codePoint)) {
+            return String.valueOf((char) codePoint);
+        } else {
+            return String.valueOf(Character.highSurrogate(codePoint)) +
+                Character.lowSurrogate(codePoint);
+        }
+    }
 }