com.packenius.datadivider.raw_content.RawContentDescription Maven / Gradle / Ivy

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package com.packenius.datadivider.raw_content;

import com.packenius.dumpapi.CrossPointer;
import com.packenius.dumpapi.DumpBlock;
import com.packenius.dumpapi.DumpReader;
import com.packenius.dumpapi.MainDumpBlock;

/**
 * Creates a dump of any byte array or file content.
 * @author Christian Packenius, 2019.
 */
public class RawContentDescription extends MainDumpBlock {
    protected static final int RAW_EXPONENT = 5; // Factor 32

    public RawContentDescription(DumpReader reader) {
        super(reader);

        // Get max block size for main dump block.
        int length = reader.length;
        int blockSize = 0x10000000;
        while (blockSize > length && blockSize > 256) {
            blockSize >>= RAW_EXPONENT;
        }

        // Create dump blocks.
        while (reader.getCurrentIndex() < reader.length) {
            partIt(reader, blockSize);
        }

        // Prüfen, ob das Ende der Klasse erreicht wurde.
        setEndAddress(reader);
    }

    protected static String partIt(DumpReader reader, int block) {
        int _start = reader.getCurrentIndex();
        for (int i = 0; i < (2 ^ RAW_EXPONENT) && reader.getCurrentIndex() < reader.length; i++) {
            if (block == 256) {
                int start = reader.getCurrentIndex();
                int len = Math.min(256, reader.length - start);
                int end = start + len - 1;
                String range = start + " .. " + end;
                reader.readBytes(len, range);
            } else {
                new RawBytesDumpBlock(reader, block);
            }
        }
        int _end = reader.getCurrentIndex();
        return _start + " .. " + _end;
    }

    @Override
    public String toString() {
        return "Raw byte array";
    }

    @Override
    public String getDescription() {
        return "Raw bytes without semantic translation.";
    }

    @Override
    public DumpBlock getCrossPointerDumpBlocks(CrossPointer crossPointer) {
        // There are no cross pointer within raw bytes.
        return null;
    }
}