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-rw-r--r--src/main/java/org/traccar/helper/BufferUtil.java47
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
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+++ b/src/main/java/org/traccar/helper/BufferUtil.java
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+/*
+ * 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;
+ }
+
+}