// 
// Decompiled by Procyon v0.6.0
// 

package io.netty.handler.codec.http.websocketx;

import io.netty.buffer.ByteBuf;
import io.netty.util.ByteProcessor;

final class Utf8Validator implements ByteProcessor
{
    private static final int UTF8_ACCEPT = 0;
    private static final int UTF8_REJECT = 12;
    private static final byte[] TYPES;
    private static final byte[] STATES;
    private int state;
    private int codep;
    private boolean checking;
    
    Utf8Validator() {
        this.state = 0;
    }
    
    public void check(final ByteBuf buffer) {
        this.checking = true;
        buffer.forEachByte(this);
    }
    
    void check(final ByteBuf buffer, final int index, final int length) {
        this.checking = true;
        buffer.forEachByte(index, length, this);
    }
    
    public void finish() {
        this.checking = false;
        this.codep = 0;
        if (this.state != 0) {
            this.state = 0;
            throw new CorruptedWebSocketFrameException(WebSocketCloseStatus.INVALID_PAYLOAD_DATA, "bytes are not UTF-8");
        }
    }
    
    @Override
    public boolean process(final byte b) throws Exception {
        final byte type = Utf8Validator.TYPES[b & 0xFF];
        this.codep = ((this.state != 0) ? ((b & 0x3F) | this.codep << 6) : (255 >> type & b));
        this.state = Utf8Validator.STATES[this.state + type];
        if (this.state == 12) {
            this.checking = false;
            throw new CorruptedWebSocketFrameException(WebSocketCloseStatus.INVALID_PAYLOAD_DATA, "bytes are not UTF-8");
        }
        return true;
    }
    
    public boolean isChecking() {
        return this.checking;
    }
    
    static {
        TYPES = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 11, 6, 6, 6, 5, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 };
        STATES = new byte[] { 0, 12, 24, 36, 60, 96, 84, 12, 12, 12, 48, 72, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 0, 12, 12, 12, 12, 12, 0, 12, 0, 12, 12, 12, 24, 12, 12, 12, 12, 12, 24, 12, 24, 12, 12, 12, 12, 12, 12, 12, 12, 12, 24, 12, 12, 12, 12, 12, 24, 12, 12, 12, 12, 12, 12, 12, 24, 12, 12, 12, 12, 12, 12, 12, 12, 12, 36, 12, 36, 12, 12, 12, 36, 12, 12, 12, 12, 12, 36, 12, 36, 12, 12, 12, 36, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12 };
    }
}