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add filesystem/iso9660

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This commit is contained in:
Zack Buhman 2024-12-31 13:25:02 -06:00
parent ee27558408
commit b12ac0e017
5 changed files with 231 additions and 14 deletions
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43
filesystem/iso9660/ByteParser.java Normal file
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@ -0,0 +1,43 @@
package filesystem.iso9660;
public class ByteParser {
byte[] array;
int offset;
public ByteParser(byte[] array, int offset) {
this.array = array;
this.offset = offset;
}
public static int shortLE(int i0, int i1) {
return ((i1 << 8)
| (i0 << 0));
}
public static int intLE(int i0, int i1, int i2, int i3) {
return ((i3 << 24)
| (i2 << 16)
| (i1 << 8)
| (i0 << 0));
}
public int getByte(int pos) {
return array[offset + pos];
}
public int getShortLE(int pos) {
int i0 = array[offset + pos + 0];
int i1 = array[offset + pos + 1];
return shortLE(i0, i1);
}
public int getIntLE(int pos) {
int i0 = array[offset + pos + 0];
int i1 = array[offset + pos + 1];
int i2 = array[offset + pos + 2];
int i3 = array[offset + pos + 3];
return intLE(i0, i1, i2, i3);
}
}

50
filesystem/iso9660/DirectoryRecord.java Normal file
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@ -0,0 +1,50 @@
package filesystem.iso9660;
public class DirectoryRecord extends ByteParser {
public static final int LENGTH_OF_DIRECTORY_RECORD_START = 0;
public static final int LENGTH_OF_DIRECTORY_RECORD_END = 0;
public static final int EXTENDED_ATTRIBUTE_RECORD_LENGTH_START = 1;
public static final int EXTENDED_ATTRIBUTE_RECORD_LENGTH_END = 1;
public static final int LOCATION_OF_EXTENT_START = 2;
public static final int LOCATION_OF_EXTENT_END = 9;
public static final int DATA_LENGTH_START = 10;
public static final int DATA_LENGTH_END = 17;
public static final int RECORDING_DATE_AND_TIME_START = 18;
public static final int RECORDING_DATE_AND_TIME_END = 24;
public static final int FILE_FLAGS_START = 25;
public static final int FILE_FLAGS_END = 25;
public static final int FILE_UNIT_SIZE_START = 26;
public static final int FILE_UNIT_SIZE_END = 26;
public static final int INTERLEAVE_GAP_SIZE_START = 27;
public static final int INTERLEAVE_GAP_SIZE_END = 27;
public static final int VOLUME_SEQUENCE_NUMBER_START = 28;
public static final int VOLUME_SEQUENCE_NUMBER_END = 31;
public static final int LENGTH_OF_FILE_IDENTIFIER_START = 32;
public static final int LENGTH_OF_FILE_IDENTIFIER_END = 32;
public static final int FILE_IDENTIFIER_START = 33;
public static final int FILE_IDENTIFIER_END = 32;
public static final int lengthOfDirectoryRecord() {
return getByte(LENGTH_OF_DIRECTORY_RECORD_START);
}
public static final int extendedAttributeRecordLength() {
return getByte(EXTENDED_ATTRIBUTE_RECORD_LENGTH_START);
}
public static final int locationOfExtent() {
return getIntBE(LOCATION_OF_EXTENT_START);
}
public static final int dataLength() {
return getIntBE(DATA_LENGTH_START);
}
public static final int fileUnitSize() {
return getByte(FILE_UNIT_SIZE_START);
}
public static final int interleaveGapSize() {
return getByte(INTERLEAVE_GAP_SIZE_START);
}
public static final int volumeSequenceNumber() {
return getShortBE(VOLUME_SEQUENCE_NUMBER_START);
}
public static final int lengthOfFileIdentifier() {
return getByte(LENGTH_OF_FILE_IDENTIFIER_START);
}
}

96
filesystem/iso9660/PrimaryVolumeDescriptor.java Normal file
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@ -0,0 +1,96 @@
package filesystem.iso9660;
public class PrimaryVolumeDescriptor extends ByteParser {
public static final int VOLUME_DESCRIPTOR_TYPE_START = 0;
public static final int VOLUME_DESCRIPTOR_TYPE_END = 0;
public static final int STANDARD_IDENTIFIER_START = 1;
public static final int STANDARD_IDENTIFIER_END = 5;
public static final int VOLUME_DESCRIPTOR_VERSION_START = 6;
public static final int VOLUME_DESCRIPTOR_VERSION_END = 6;
public static final int SYSTEM_IDENTIFIER_START = 8;
public static final int SYSTEM_IDENTIFIER_END = 39;
public static final int VOLUME_IDENTIFIER_START = 40;
public static final int VOLUME_IDENTIFIER_END = 71;
public static final int VOLUME_SPACE_SIZE_START = 80;
public static final int VOLUME_SPACE_SIZE_END = 87;
public static final int VOLUME_SET_SIZE_START = 120;
public static final int VOLUME_SET_SIZE_END = 123;
public static final int VOLUME_SEQUENCE_NUMBER_START = 124;
public static final int VOLUME_SEQUENCE_NUMBER_END = 127;
public static final int LOGICAL_BLOCK_SIZE_START = 128;
public static final int LOGICAL_BLOCK_SIZE_END = 131;
public static final int PATH_TABLE_SIZE_START = 132;
public static final int PATH_TABLE_SIZE_END = 139;
public static final int LOCATION_OF_OCCURRENCE_OF_TYPE_L_PATH_TABLE_START = 140;
public static final int LOCATION_OF_OCCURRENCE_OF_TYPE_L_PATH_TABLE_END = 143;
public static final int LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_L_PATH_TABLE_START = 144;
public static final int LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_L_PATH_TABLE_END = 147;
public static final int LOCATION_OF_OCCURENCE_OF_TYPE_M_PATH_TABLE_START = 148;
public static final int LOCATION_OF_OCCURENCE_OF_TYPE_M_PATH_TABLE_END = 151;
public static final int LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_M_PATH_TABLE_START = 152;
public static final int LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_M_PATH_TABLE_END = 155;
public static final int DIRECTORY_RECORD_FOR_ROOT_DIRECTORY_START = 156;
public static final int DIRECTORY_RECORD_FOR_ROOT_DIRECTORY_END = 189;
public static final int VOLUME_SET_IDENTIFIER_START = 190;
public static final int VOLUME_SET_IDENTIFIER_END = 317;
public static final int PUBLISHER_IDENTIFIER_START = 318;
public static final int PUBLISHER_IDENTIFIER_END = 445;
public static final int DATA_PREPARER_IDENTIFIER_START = 446;
public static final int DATA_PREPARER_IDENTIFIER_END = 573;
public static final int APPLICATION_IDENTIFIER_START = 574;
public static final int APPLICATION_IDENTIFIER_END = 701;
public static final int COPYRIGHT_FILE_IDENTIFIER_START = 702;
public static final int COPYRIGHT_FILE_IDENTIFIER_END = 738;
public static final int ABSTRACT_FILE_IDENTIFIER_START = 739;
public static final int ABSTRACT_FILE_IDENTIFIER_END = 775;
public static final int BIBLIOGRAPHIC_FILE_IDENTIFIER_START = 776;
public static final int BIBLIOGRAPHIC_FILE_IDENTIFIER_END = 812;
public static final int VOLUME_CREATION_DATE_AND_TIME_START = 813;
public static final int VOLUME_CREATION_DATE_AND_TIME_END = 829;
public static final int VOLUME_MODIFICATION_DATE_AND_TIME_START = 830;
public static final int VOLUME_MODIFICATION_DATE_AND_TIME_END = 846;
public static final int VOLUME_EXPIRATION_DATE_AND_TIME_START = 847;
public static final int VOLUME_EXPIRATION_DATE_AND_TIME_END = 863;
public static final int VOLUME_EFFECTIVE_DATE_AND_TIME_START = 864;
public static final int VOLUME_EFFECTIVE_DATE_AND_TIME_END = 880;
public static final int FILE_STRUCTURE_VERSION_START = 881;
public static final int FILE_STRUCTURE_VERSION_END = 881;
public static final int APPLICATION_USE_START = 883;
public static final int APPLICATION_USE_END = 1394;
PrimaryVolumeDescriptor(byte[] array, int offset) {
super(array, offset);
}
public int volumeDescriptorType() {
return getByte(VOLUME_DESCRIPTOR_TYPE_START);
}
public int volumeDescriptorVersion() {
return getByte(VOLUME_DESCRIPTOR_VERSION_START);
}
public int volumeSpaceSize() {
return getIntLE(VOLUME_SPACE_SIZE_START);
}
public int volumeSetSize() {
return getShortLE(VOLUME_SET_SIZE_START);
}
public int volumeSequenceNumber() {
return getShortLE(VOLUME_SEQUENCE_NUMBER_START);
}
public int logicalBlockSize() {
return getShortLE(LOGICAL_BLOCK_SIZE_START);
}
public int pathTableSize() {
return getIntLE(PATH_TABLE_SIZE_START);
}
public int locationOfOccurrenceOfTypeLPathTable() {
return getShortLE(LOCATION_OF_OCCURRENCE_OF_TYPE_L_PATH_TABLE_START);
}
public int locationOfOptionalOccurenceOfTypeLPathTable() {
return getShortLE(LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_L_PATH_TABLE_START);
}
public int locationOfOccurenceOfTypeMPathTable() {
return getShortLE(LOCATION_OF_OCCURENCE_OF_TYPE_M_PATH_TABLE_START);
}
public int locationOfOptionalOccurenceOfTypeMPathTable() {
return getShortLE(LOCATION_OF_OPTIONAL_OCCURENCE_OF_TYPE_M_PATH_TABLE_START);
}
}

37
java/nio/ByteBuffer.java
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@ -31,6 +31,11 @@ public class ByteBuffer extends Buffer {
return this;
}
public ByteBuffer offset(int off) {
offset = off;
return this;
}
private static int intBE(int i0, int i1, int i2, int i3) {
return ((i0 << 24)
| (i1 << 16)
@ -55,20 +60,24 @@ public class ByteBuffer extends Buffer {
| (i1 << 8));
}
private int ix(int pos) {
return offset + pos;
}
public byte get() {
byte i0 = array[position];
byte i0 = array[ix(position)];
position += 1;
return i0;
}
public byte get(int pos) {
byte i0 = array[pos];
byte i0 = array[ix(pos)];
return i0;
}
public short getShort() {
int i0 = array[position + 0];
int i1 = array[position + 1];
int i0 = array[ix(position) + 0];
int i1 = array[ix(position) + 1];
position += 2;
@ -80,8 +89,8 @@ public class ByteBuffer extends Buffer {
}
public short getShort(int pos) {
int i0 = array[pos + 0];
int i1 = array[pos + 1];
int i0 = array[ix(pos) + 0];
int i1 = array[ix(pos) + 1];
if (bigEndian) {
return (short)shortBE(i0, i1);
@ -91,10 +100,10 @@ public class ByteBuffer extends Buffer {
}
public int getInt() {
int i0 = array[position + 0];
int i1 = array[position + 1];
int i2 = array[position + 2];
int i3 = array[position + 3];
int i0 = array[ix(position) + 0];
int i1 = array[ix(position) + 1];
int i2 = array[ix(position) + 2];
int i3 = array[ix(position) + 3];
position += 4;
@ -106,10 +115,10 @@ public class ByteBuffer extends Buffer {
}
public int getInt(int pos) {
int i0 = array[pos + 0];
int i1 = array[pos + 1];
int i2 = array[pos + 2];
int i3 = array[pos + 3];
int i0 = array[ix(pos) + 0];
int i1 = array[ix(pos) + 1];
int i2 = array[ix(pos) + 2];
int i3 = array[ix(pos) + 3];
if (bigEndian) {
return intBE(i0, i1, i2, i3);

19
p/ISOParser.java Normal file
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@ -0,0 +1,19 @@
package p;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.io.IOException;
import filesystem.iso9660.PrimaryVolumeDescriptor;
class ISOParser {
public static void main(String[] args) throws IOException {
byte[] buf = Files.readAllBytes(Paths.get("test.iso"));
for (int i = PrimaryVolumeDescriptor.STANDARD_IDENTIFIER_START; i <= PrimaryVolumeDescriptor.STANDARD_IDENTIFIER_END; i++) {
System.out.print(buf[i]);
}
System.out.println();
}
}