package androidx.multidex;

import android.support.v4.media.session.PlaybackStateCompat;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.zip.CRC32;
import java.util.zip.ZipException;

/* loaded from: classes.dex */
final class ZipUtil {

    static class CentralDirectory {
        long a;
        long b;

        CentralDirectory() {
        }
    }

    static long a(File file) throws IOException {
        RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
        try {
            return a(randomAccessFile, a(randomAccessFile));
        } finally {
            randomAccessFile.close();
        }
    }

    static CentralDirectory a(RandomAccessFile randomAccessFile) throws IOException, ZipException {
        long length = randomAccessFile.length() - 22;
        if (length >= 0) {
            long j = length - PlaybackStateCompat.ACTION_PREPARE_FROM_SEARCH;
            long j2 = j >= 0 ? j : 0L;
            int reverseBytes = Integer.reverseBytes(101010256);
            do {
                randomAccessFile.seek(length);
                if (randomAccessFile.readInt() == reverseBytes) {
                    randomAccessFile.skipBytes(2);
                    randomAccessFile.skipBytes(2);
                    randomAccessFile.skipBytes(2);
                    randomAccessFile.skipBytes(2);
                    CentralDirectory centralDirectory = new CentralDirectory();
                    centralDirectory.b = Integer.reverseBytes(randomAccessFile.readInt()) & 4294967295L;
                    centralDirectory.a = Integer.reverseBytes(randomAccessFile.readInt()) & 4294967295L;
                    return centralDirectory;
                }
                length--;
            } while (length >= j2);
            throw new ZipException("End Of Central Directory signature not found");
        }
        throw new ZipException("File too short to be a zip file: " + randomAccessFile.length());
    }

    static long a(RandomAccessFile randomAccessFile, CentralDirectory centralDirectory) throws IOException {
        CRC32 crc32 = new CRC32();
        long j = centralDirectory.b;
        randomAccessFile.seek(centralDirectory.a);
        byte[] bArr = new byte[16384];
        int read = randomAccessFile.read(bArr, 0, (int) Math.min(PlaybackStateCompat.ACTION_PREPARE, j));
        while (read != -1) {
            crc32.update(bArr, 0, read);
            j -= read;
            if (j == 0) {
                break;
            }
            read = randomAccessFile.read(bArr, 0, (int) Math.min(PlaybackStateCompat.ACTION_PREPARE, j));
        }
        return crc32.getValue();
    }
}