82 lines
2.9 KiB
Java
82 lines
2.9 KiB
Java
package com.bytezone.diskbrowser.cpm;
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import com.bytezone.diskbrowser.disk.AbstractSector;
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import com.bytezone.diskbrowser.disk.Disk;
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import com.bytezone.diskbrowser.disk.DiskAddress;
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// -----------------------------------------------------------------------------------//
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class CPMCatalogSector extends AbstractSector
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// -----------------------------------------------------------------------------------//
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{
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private static int CATALOG_ENTRY_SIZE = 32;
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// ---------------------------------------------------------------------------------//
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CPMCatalogSector (Disk disk, byte[] buffer, DiskAddress diskAddress)
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// ---------------------------------------------------------------------------------//
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{
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super (disk, buffer, diskAddress);
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public String createText ()
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// ---------------------------------------------------------------------------------//
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{
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StringBuilder text = getHeader ("Catalog Sector");
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for (int i = 0; i <= 255; i += CATALOG_ENTRY_SIZE)
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{
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if (buffer[i] == (byte) 0xE5 && buffer[i + 1] == (byte) 0xE5)
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break;
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int userNumber = buffer[i] & 0xFF;
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if (userNumber > 31 && userNumber != (byte) 0xE5)
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break;
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boolean readOnly = (buffer[i + 9] & 0x80) != 0;
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boolean systemFile = (buffer[i + 10] & 0x80) != 0;
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boolean unknown = (buffer[i + 11] & 0x80) != 0;
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String type;
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String extra;
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if (readOnly || systemFile || unknown)
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{
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byte[] typeBuffer = new byte[3];
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typeBuffer[0] = (byte) (buffer[i + 9] & 0x7F);
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typeBuffer[1] = (byte) (buffer[i + 10] & 0x7F);
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typeBuffer[2] = (byte) (buffer[i + 11] & 0x7F);
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type = new String (typeBuffer).trim ();
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extra = String.format (" (%s%s%s)", readOnly ? "read only" : "",
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systemFile ? "system file" : "", unknown ? "unknown" : "");
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}
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else
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{
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type = new String (buffer, i + 9, 3).trim ();
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extra = "";
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}
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if (buffer[i] == (byte) 0xE5)
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addText (text, buffer, i, 1, "Deleted file?");
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else
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addText (text, buffer, i, 1, "User number");
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if (buffer[i + 1] == 0)
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addText (text, buffer, i + 1, 4, "File name : ");
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else
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addText (text, buffer, i + 1, 4, "File name : " + new String (buffer, i + 1, 8));
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addText (text, buffer, i + 5, 4, "");
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addText (text, buffer, i + 9, 3, "File type : " + type + extra);
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addText (text, buffer, i + 12, 1, "Extent counter LO");
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addText (text, buffer, i + 13, 1, "Reserved");
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addText (text, buffer, i + 14, 1, "Extent counter HI");
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addText (text, buffer, i + 15, 1, "Record count");
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for (int j = 0; j < 4; j++)
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addText (text, buffer, i + 16 + j * 4, 4, "");
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text.append ("\n");
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}
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text.deleteCharAt (text.length () - 1);
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return text.toString ();
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}
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} |