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/*
 * Copyright (C) 2018 Julien Viet
 *
 * 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 io.vertx.pgclient.impl.util;

import io.netty.util.ByteProcessor;

/**
 * A processor that detects the end of a well formed UTF8 string, starting and ending with a {@code "} char.
 * 

* It process all bytes until it finds the ending {@code "}. */ public class UTF8StringEndDetector implements ByteProcessor { private boolean inString; private boolean escaped; @Override public boolean process(byte value) { boolean wasEscaped = escaped; escaped = false; // In UTF-8 low ASCII have their 8th bit == 0 if ((value & 0b10000000) == 0) { switch (value) { case '"': if (!wasEscaped) { if (inString) { return false; } else { inString = true; } } break; case '\\': if (inString && !wasEscaped) { escaped = true; } break; } } return true; } }





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