From bca3719ab2dfa872bd647e43fef1db5274923072 Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Thu, 14 Apr 2016 10:04:43 +0200
Subject: [PATCH] proper equals and hashCode

---
 .../openapi/util/io/ByteSequence.java         | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/platform/util/src/com/intellij/openapi/util/io/ByteSequence.java b/platform/util/src/com/intellij/openapi/util/io/ByteSequence.java
index 9f4416075566..120a1cbdf4b1 100644
--- a/platform/util/src/com/intellij/openapi/util/io/ByteSequence.java
+++ b/platform/util/src/com/intellij/openapi/util/io/ByteSequence.java
@@ -48,4 +48,36 @@ public class ByteSequence {
   public int getLength() {
     return myLen;
   }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+
+    ByteSequence sequence = (ByteSequence)o;
+    int len = myLen;
+    if (len != sequence.myLen) return false;
+
+    final byte[] thisBytes = myBytes;
+    final byte[] thatBytes = sequence.myBytes;
+    for (int i = 0, j = myOffset, k = sequence.myOffset; i < len; i++) {
+      if (thisBytes[j] != thatBytes[k]) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    final int len = myLen;
+    final byte[] thisBytes = myBytes;
+
+    int result = 1;
+    for (int i = 0, j = myOffset; i < len; i++) {
+      result = result * 31 + thisBytes[j];
+    }
+    return result;
+  }
 }