AngersZhuuuu commented on a change in pull request #34848:
URL: https://github.com/apache/spark/pull/34848#discussion_r782680699
##########
File path:
common/unsafe/src/main/java/org/apache/spark/unsafe/array/ByteArrayMethods.java
##########
@@ -91,4 +91,64 @@ public static boolean arrayEquals(
}
return true;
}
+
+ public static boolean contains(byte[] array, byte[] target) {
+ if (target.length == 0) {
+ return true;
+ } else if (array.length == 0) {
+ return false;
+ } else if (target.length > array.length) {
+ return false;
+ } else {
+ return indexOf(array, target) >= 0;
+ }
+ }
+
+ public static boolean startsWith(byte[] array, byte[] target) {
+ if (target.length == 0) {
+ return true;
+ } else if (array.length == 0) {
+ return false;
+ } else if (target.length > array.length) {
+ return false;
+ } else {
+ return indexOf(array, target) == 0;
+ }
+ }
+
+ public static boolean endsWith(byte[] array, byte[] target) {
+ if (target.length == 0) {
+ return true;
+ } else if (array.length == 0) {
+ return false;
+ } else if (target.length > array.length) {
+ return false;
+ } else {
+ int endPos = array.length - target.length;
+ for (int i = 0; i < target.length; ++i) {
+ if (array[endPos + i] != target[i]) {
+ return false;
+ }
+ }
+ return true;
+ }
+ }
Review comment:
Updated with same method like `UTF8String`, so performance is not a
concern?
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