Slightly optimize advanceCursor() methods

Author: knutwannheden

rewrite-json/src/main/java/org/openrewrite/json/internal/JsonParserVisitor.java

@@ -275,9 +275,11 @@ private Space prefix(Token token) {
     }
 
     public int advanceCursor(int newCodePointIndex) {
-        for (; codePointCursor < newCodePointIndex; codePointCursor++) {
-            cursor = source.offsetByCodePoints(cursor, 1);
+        if (newCodePointIndex <= codePointCursor) {
+            return cursor;
         }
+        cursor = source.offsetByCodePoints(cursor, newCodePointIndex - codePointCursor);
+        codePointCursor = newCodePointIndex;
         return cursor;
     }
 

rewrite-toml/src/main/java/org/openrewrite/toml/internal/TomlParserVisitor.java

@@ -441,9 +441,11 @@ private Space prefix(Token token) {
     }
 
     public int advanceCursor(int newCodePointIndex) {
-        for (; codePointCursor < newCodePointIndex; codePointCursor++) {
-            cursor = source.offsetByCodePoints(cursor, 1);
+        if (newCodePointIndex <= codePointCursor) {
+            return cursor;
         }
+        cursor = source.offsetByCodePoints(cursor, newCodePointIndex - codePointCursor);
+        codePointCursor = newCodePointIndex;
         return cursor;
     }
 

rewrite-xml/src/main/java/org/openrewrite/xml/internal/XmlParserVisitor.java

@@ -467,9 +467,11 @@ private String prefix(Token token) {
      */
     @SuppressWarnings("UnusedReturnValue")
     private int advanceCursor(int newCodePointIndex) {
-        for (; codePointCursor < newCodePointIndex; codePointCursor++) {
-            cursor = source.offsetByCodePoints(cursor, 1);
+        if (newCodePointIndex <= codePointCursor) {
+            return cursor;
         }
+        cursor = source.offsetByCodePoints(cursor, newCodePointIndex - codePointCursor);
+        codePointCursor = newCodePointIndex;
         return cursor;
     }