CrackMe.apk

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    package androidx.emoji2.text.flatbuffer;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.nio.charset.StandardCharsets;

public class Utf8Old extends Utf8 {
    private static final ThreadLocal<Cache> CACHE = ThreadLocal.withInitial(Utf8Old$$ExternalSyntheticLambda0.INSTANCE);

    private static class Cache {
        final CharsetDecoder decoder = StandardCharsets.UTF_8.newDecoder();
        final CharsetEncoder encoder = StandardCharsets.UTF_8.newEncoder();
        CharSequence lastInput = null;
        ByteBuffer lastOutput = null;

        Cache() {
        }
    }

    static /* synthetic */ Cache lambda$static$0() {
        return new Cache();
    }

    public int encodedLength(CharSequence charSequence) {
        CharBuffer charBuffer;
        Cache cache = CACHE.get();
        int length = (int) (((float) charSequence.length()) * cache.encoder.maxBytesPerChar());
        if (cache.lastOutput == null || cache.lastOutput.capacity() < length) {
            cache.lastOutput = ByteBuffer.allocate(Math.max(128, length));
        }
        cache.lastOutput.clear();
        cache.lastInput = charSequence;
        if (charSequence instanceof CharBuffer) {
            charBuffer = (CharBuffer) charSequence;
        } else {
            charBuffer = CharBuffer.wrap(charSequence);
        }
        CoderResult encode = cache.encoder.encode(charBuffer, cache.lastOutput, true);
        if (encode.isError()) {
            try {
                encode.throwException();
            } catch (CharacterCodingException e) {
                throw new IllegalArgumentException("bad character encoding", e);
            }
        }
        cache.lastOutput.flip();
        return cache.lastOutput.remaining();
    }

    public void encodeUtf8(CharSequence charSequence, ByteBuffer byteBuffer) {
        Cache cache = CACHE.get();
        if (cache.lastInput != charSequence) {
            encodedLength(charSequence);
        }
        byteBuffer.put(cache.lastOutput);
    }

    public String decodeUtf8(ByteBuffer byteBuffer, int i, int i2) {
        CharsetDecoder charsetDecoder = CACHE.get().decoder;
        charsetDecoder.reset();
        ByteBuffer duplicate = byteBuffer.duplicate();
        duplicate.position(i);
        duplicate.limit(i + i2);
        try {
            return charsetDecoder.decode(duplicate).toString();
        } catch (CharacterCodingException e) {
            throw new IllegalArgumentException("Bad encoding", e);
        }
    }
}
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