63 lines
2.5 KiB
Java
63 lines
2.5 KiB
Java
package com.bytezone.diskbrowser.disk;
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import com.bytezone.diskbrowser.utilities.HexFormatter;
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import com.bytezone.diskbrowser.utilities.Utility;
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// https://www.discferret.com/wiki/Apple_DiskCopy_4.2
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// Apple II File Type Notes $E0/0005 (macintosh)
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// -----------------------------------------------------------------------------------//
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public class PrefixDiskCopy
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// -----------------------------------------------------------------------------------//
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{
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private String name;
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private int dataSize;
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private int tagSize;
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private int dataChecksum;
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private int tagChecksum;
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private int diskFormat;
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private int format;
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private int id; // should be 0x0100
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// ---------------------------------------------------------------------------------//
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public PrefixDiskCopy (byte[] buffer)
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// ---------------------------------------------------------------------------------//
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{
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int nameLength = buffer[0] * 0xFF;
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if (nameLength < 1 || nameLength > 0x3F)
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name = HexFormatter.getPascalString (buffer, 0);
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dataSize = Utility.getLongBigEndian (buffer, 0x40);
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tagSize = Utility.getLongBigEndian (buffer, 0x44);
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dataChecksum = Utility.getLongBigEndian (buffer, 0x48);
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tagChecksum = Utility.getLongBigEndian (buffer, 0x4C);
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diskFormat = buffer[0x50] & 0xFF;
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format = buffer[0x51] & 0xFF;
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id = Utility.getShortBigEndian (buffer, 0x52);
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}
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// ---------------------------------------------------------------------------------//
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int getBlocks ()
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// ---------------------------------------------------------------------------------//
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{
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return dataSize / 512;
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public String toString ()
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// ---------------------------------------------------------------------------------//
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{
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StringBuilder text = new StringBuilder ();
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text.append (String.format ("Name : %s%n", name));
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text.append (String.format ("Data size : %08X (%<,d)%n", dataSize));
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text.append (String.format ("Tag size : %08X (%<,d)%n", tagSize));
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text.append (String.format ("Data checksum : %08X (%<,d)%n", dataChecksum));
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text.append (String.format ("Tag checksum : %08X (%<,d)%n", tagChecksum));
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text.append (String.format ("Disk format : %02X%n", diskFormat));
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text.append (String.format ("Format byte : %02X%n", format));
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text.append (String.format ("ID : %04X%n", id));
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return text.toString ();
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}
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}
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