1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/helper/BufferUtil.java b/src/main/java/org/traccar/helper/BufferUtil.java
new file mode 100644
index 000000000..15c619ec5
--- /dev/null
+++ b/src/main/java/org/traccar/helper/BufferUtil.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.helper;
+
+import java.nio.charset.StandardCharsets;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+
+public final class BufferUtil {
+
+    private BufferUtil() {
+    }
+
+    public static int indexOf(String needle, ByteBuf haystack) {
+        ByteBuf needleBuffer = Unpooled.wrappedBuffer(needle.getBytes(StandardCharsets.US_ASCII));
+        try {
+            return ByteBufUtil.indexOf(needleBuffer, haystack);
+        } finally {
+            needleBuffer.release();
+        }
+    }
+
+    public static int indexOf(String needle, ByteBuf haystack, int startIndex, int endIndex) {
+        ByteBuf wrappedHaystack = Unpooled.wrappedBuffer(haystack);
+        wrappedHaystack.readerIndex(startIndex - haystack.readerIndex());
+        wrappedHaystack.writerIndex(endIndex - haystack.readerIndex());
+        int result = indexOf(needle, wrappedHaystack);
+        return result < 0 ? result : haystack.readerIndex() + result;
+    }
+
+}