dmolony-DiskBrowser/src/com/bytezone/diskbrowser/utilities/Utility.java

595 lines
22 KiB
Java

package com.bytezone.diskbrowser.utilities;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.time.DateTimeException;
import java.time.LocalDateTime;
import java.util.Arrays;
import java.util.List;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
// -----------------------------------------------------------------------------------//
public final class Utility
// -----------------------------------------------------------------------------------//
{
public static final byte ASCII_BACKSPACE = 0x08;
public static final byte ASCII_LF = 0x0A;
public static final byte ASCII_CR = 0x0D;
public static final byte ASCII_QUOTE = 0x22;
public static final byte ASCII_DOLLAR = 0x24;
public static final byte ASCII_PERCENT = 0x25;
public static final byte ASCII_LEFT_BRACKET = 0x28;
public static final byte ASCII_RIGHT_BRACKET = 0x29;
public static final byte ASCII_COMMA = 0x2C;
public static final byte ASCII_MINUS = 0x2D;
public static final byte ASCII_DOT = 0x2E;
public static final byte ASCII_COLON = 0x3A;
public static final byte ASCII_SEMI_COLON = 0x3B;
public static final byte ASCII_EQUALS = 0x3D;
public static final byte ASCII_CARET = 0x5E;
private static final List<String> suffixes = Arrays.asList ("po", "dsk", "do", "hdv",
"2mg", "d13", "sdk", "shk", "bxy", "bny", "woz", "img", "dimg");
// ---------------------------------------------------------------------------------//
private Utility ()
// ---------------------------------------------------------------------------------//
{
}
// ---------------------------------------------------------------------------------//
public static int getTotalSuffixes ()
// ---------------------------------------------------------------------------------//
{
return suffixes.size ();
}
// ---------------------------------------------------------------------------------//
public static String getSuffix (int index)
// ---------------------------------------------------------------------------------//
{
return suffixes.get (index);
}
// ---------------------------------------------------------------------------------//
public static boolean test (Graphics2D g)
// ---------------------------------------------------------------------------------//
{
return g.getFontRenderContext ().getTransform ()
.equals (AffineTransform.getScaleInstance (2.0, 2.0));
}
// ---------------------------------------------------------------------------------//
public static void printStackTrace ()
// ---------------------------------------------------------------------------------//
{
for (StackTraceElement ste : java.lang.Thread.currentThread ().getStackTrace ())
System.out.println (ste);
}
// ---------------------------------------------------------------------------------//
public static String rtrim (StringBuilder text)
// ---------------------------------------------------------------------------------//
{
while (text.length () > 0 && text.charAt (text.length () - 1) == '\n')
text.deleteCharAt (text.length () - 1);
return text.toString ();
}
// ---------------------------------------------------------------------------------//
public static int getIndent (StringBuilder fullText)
// ---------------------------------------------------------------------------------//
{
int ptr = fullText.length () - 1;
int indent = 0;
while (ptr >= 0 && fullText.charAt (ptr) != '\n')
{
--ptr;
++indent;
}
return indent;
}
// ---------------------------------------------------------------------------------//
// public static int getLong (byte[] buffer, int ptr)
// // ---------------------------------------------------------------------------------//
// {
// return getWord (buffer, ptr) + getWord (buffer, ptr + 2) * 0x10000;
// }
// ---------------------------------------------------------------------------------//
// public static int getWord (byte[] buffer, int ptr)
// // ---------------------------------------------------------------------------------//
// {
// int a = (buffer[ptr + 1] & 0xFF) << 8;
// int b = buffer[ptr] & 0xFF;
// return a + b;
// }
// ---------------------------------------------------------------------------------//
public static int intValue (byte b1, byte b2)
// ---------------------------------------------------------------------------------//
{
return (b1 & 0xFF) | ((b2 & 0xFF) << 8);
}
// ---------------------------------------------------------------------------------//
public static int intValue (byte b1, byte b2, byte b3)
// ---------------------------------------------------------------------------------//
{
return (b1 & 0xFF) | ((b2 & 0xFF) << 8) | ((b3 & 0xFF) << 16);
}
// ---------------------------------------------------------------------------------//
public static int getLong (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
if (ptr >= buffer.length)
{
System.out.printf ("Index out of range (getLong): %08X%n", ptr);
return 0;
}
int val = 0;
for (int i = 3; i >= 0; i--)
{
val <<= 8;
val += buffer[ptr + i] & 0xFF;
}
return val;
}
// ---------------------------------------------------------------------------------//
public static int getLongBigEndian (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
int val = 0;
for (int i = 0; i < 4; i++)
{
val <<= 8;
val += buffer[ptr + i] & 0xFF;
}
return val;
}
// ---------------------------------------------------------------------------------//
// public static int getWordBigEndian (byte[] buffer, int ptr)
// // ---------------------------------------------------------------------------------//
// {
// int val = 0;
// for (int i = 0; i < 2; i++)
// {
// val <<= 8;
// val += buffer[ptr + i] & 0xFF;
// }
// return val;
// }
// ---------------------------------------------------------------------------------//
public static int getShort (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
if (ptr >= buffer.length)
{
System.out.printf ("Index out of range (getShort): %04X%n", ptr);
return 0;
}
return (buffer[ptr] & 0xFF) | ((buffer[ptr + 1] & 0xFF) << 8);
}
// ---------------------------------------------------------------------------------//
public static int signedShort (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
if (ptr >= buffer.length)
{
System.out.println ("Index out of range (signed short): " + ptr);
return 0;
}
return (short) ((buffer[ptr] & 0xFF) | ((buffer[ptr + 1] & 0xFF) << 8));
}
// ---------------------------------------------------------------------------------//
public static int getShortBigEndian (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
int val = 0;
for (int i = 0; i < 2; i++)
{
val <<= 8;
val |= buffer[ptr + i] & 0xFF;
}
return val;
}
// ---------------------------------------------------------------------------------//
public static LocalDateTime getAppleDate (byte[] buffer, int offset)
// ---------------------------------------------------------------------------------//
{
// int yymmdd = readShort (buffer, offset);
int yymmdd = getShort (buffer, offset);
if (yymmdd != 0)
{
int year = (yymmdd & 0xFE00) >> 9;
int month = (yymmdd & 0x01E0) >> 5;
int day = yymmdd & 0x001F;
int minute = buffer[offset + 2] & 0x3F;
int hour = buffer[offset + 3] & 0x1F;
if (year < 70)
year += 2000;
else
year += 1900;
try
{
return LocalDateTime.of (year, month, day, hour, minute);
}
catch (DateTimeException e)
{
System.out.printf ("Bad date/time: %d %d %d %d %d %n", year, month, day, hour,
minute);
}
}
return null;
}
// ---------------------------------------------------------------------------------//
public static void putAppleDate (byte[] buffer, int offset, LocalDateTime date)
// ---------------------------------------------------------------------------------//
{
if (date != null)
{
int year = date.getYear ();
int month = date.getMonthValue ();
int day = date.getDayOfMonth ();
int hour = date.getHour ();
int minute = date.getMinute ();
if (year < 2000)
year -= 1900;
else
year -= 2000;
int val1 = year << 9 | month << 5 | day;
writeShort (buffer, offset, val1);
buffer[offset + 2] = (byte) minute;
buffer[offset + 3] = (byte) hour;
}
}
// ---------------------------------------------------------------------------------//
public static void writeShort (byte[] buffer, int ptr, int value)
// ---------------------------------------------------------------------------------//
{
buffer[ptr] = (byte) (value & 0xFF);
buffer[ptr + 1] = (byte) ((value & 0xFF00) >>> 8);
}
// ---------------------------------------------------------------------------------//
public static void writeTriple (byte[] buffer, int ptr, int value)
// ---------------------------------------------------------------------------------//
{
buffer[ptr] = (byte) (value & 0xFF);
buffer[ptr + 1] = (byte) ((value & 0xFF00) >>> 8);
buffer[ptr + 2] = (byte) ((value & 0xFF0000) >>> 16);
}
// ---------------------------------------------------------------------------------//
// public static int readShort (byte[] buffer, int ptr)
// // ---------------------------------------------------------------------------------//
// {
// return (buffer[ptr] & 0xFF) | (buffer[ptr + 1] & 0xFF) << 8;
// }
// ---------------------------------------------------------------------------------//
public static int readTriple (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
return (buffer[ptr] & 0xFF) | (buffer[ptr + 1] & 0xFF) << 8
| (buffer[ptr + 2] & 0xFF) << 16;
}
// ---------------------------------------------------------------------------------//
public static String matchFlags (int flag, String[] chars)
// ---------------------------------------------------------------------------------//
{
int weight = (int) Math.pow (2, chars.length - 1);
StringBuilder text = new StringBuilder ();
for (int i = 0; i < chars.length; i++)
{
if ((flag & weight) != 0)
text.append (chars[i]);
else
text.append (".");
weight >>>= 1;
}
return text.toString ();
}
// ---------------------------------------------------------------------------------//
public static double getSANEDouble (byte[] buffer, int offset)
// ---------------------------------------------------------------------------------//
{
long bits = 0;
for (int i = 7; i >= 0; i--)
{
bits <<= 8;
bits |= buffer[offset + i] & 0xFF;
}
return Double.longBitsToDouble (bits);
}
// ---------------------------------------------------------------------------------//
public static int dimension (int chars, int border, int size, int gap)
// ---------------------------------------------------------------------------------//
{
return border * 2 + chars * (size + gap) - gap;
}
// ---------------------------------------------------------------------------------//
public static boolean find (byte[] buffer, byte[] key)
// ---------------------------------------------------------------------------------//
{
for (int i = 0; i < buffer.length; i++)
if (matches (buffer, i, key))
{
System.out.printf ("Matches at %04X%n", i);
return true;
}
return false;
}
// ---------------------------------------------------------------------------------//
public static boolean matches (byte[] buffer, int offset, byte[] key)
// ---------------------------------------------------------------------------------//
{
int ptr = 0;
while (offset < buffer.length && ptr < key.length)
if (buffer[offset++] != key[ptr++])
return false;
return true;
}
// ---------------------------------------------------------------------------------//
public static LocalDateTime getDateTime (byte[] buffer, int ptr)
// ---------------------------------------------------------------------------------//
{
try
{
int[] val = new int[6];
for (int i = 0; i < 6; i++)
val[i] = Integer.parseInt (String.format ("%02X", buffer[ptr + i] & 0xFF));
LocalDateTime date =
LocalDateTime.of (val[3] + 2000, val[5], val[4], val[2], val[1], val[0]);
return date;
}
catch (DateTimeException | NumberFormatException e)
{
return null;
}
}
// ---------------------------------------------------------------------------------//
public static int getSuffixNo (String filename)
// ---------------------------------------------------------------------------------//
{
return suffixes.indexOf (getSuffix (filename));
}
// ---------------------------------------------------------------------------------//
public static String getSuffix (String filename)
// ---------------------------------------------------------------------------------//
{
String lcFilename = filename.toLowerCase ();
if (lcFilename.endsWith (".gz"))
lcFilename = lcFilename.substring (0, lcFilename.length () - 3);
else if (lcFilename.endsWith (".zip"))
lcFilename = lcFilename.substring (0, lcFilename.length () - 4);
int dotPos = lcFilename.lastIndexOf ('.');
if (dotPos < 0)
return "";
return lcFilename.substring (dotPos + 1);
}
// ---------------------------------------------------------------------------------//
public static boolean validFileType (String filename)
// ---------------------------------------------------------------------------------//
{
if (filename.startsWith (".")) // ignore invisible files
return false;
return suffixes.contains (getSuffix (filename));
}
// ---------------------------------------------------------------------------------//
public static void reverse (byte[] buffer)
// ---------------------------------------------------------------------------------//
{
int lo = 0;
int hi = buffer.length - 1;
while (lo < hi)
{
byte temp = buffer[lo];
buffer[lo++] = buffer[hi];
buffer[hi--] = temp;
}
}
// ---------------------------------------------------------------------------------//
public static boolean isHighBitSet (byte value)
// ---------------------------------------------------------------------------------//
{
return (value & 0x80) != 0;
}
// ---------------------------------------------------------------------------------//
public static boolean isControlCharacter (byte value)
// ---------------------------------------------------------------------------------//
{
int val = value & 0xFF;
return val > 0 && val < 32;
}
// ---------------------------------------------------------------------------------//
public static boolean isDigit (byte value)
// ---------------------------------------------------------------------------------//
{
return value >= 0x30 && value <= 0x39;
}
// ---------------------------------------------------------------------------------//
public static boolean isLetter (byte value)
// ---------------------------------------------------------------------------------//
{
return value >= 0x41 && value <= 0x5A;
}
// ---------------------------------------------------------------------------------//
public static boolean isPossibleVariable (byte value)
// ---------------------------------------------------------------------------------//
{
return isDigit (value) || isLetter (value) || value == ASCII_DOLLAR
|| value == ASCII_PERCENT;
}
// ---------------------------------------------------------------------------------//
public static boolean isPossibleNumber (byte value)
// ---------------------------------------------------------------------------------//
{
return isDigit (value) || value == ASCII_DOT;
}
// ---------------------------------------------------------------------------------//
public static boolean isMagic (byte[] buffer, int ptr, byte[] magic)
// ---------------------------------------------------------------------------------//
{
if (ptr + magic.length >= buffer.length)
return false;
for (int i = 0; i < magic.length; i++)
if (buffer[ptr + i] != magic[i])
return false;
return true;
}
// ---------------------------------------------------------------------------------//
public static long getChecksumValue (File file)
// ---------------------------------------------------------------------------------//
{
Checksum checksum = new CRC32 ();
try
{
BufferedInputStream is =
new BufferedInputStream (new FileInputStream (file.getAbsolutePath ()));
byte[] bytes = new byte[1024];
int len = 0;
while ((len = is.read (bytes)) >= 0)
checksum.update (bytes, 0, len);
is.close ();
}
catch (IOException e)
{
e.printStackTrace ();
}
return checksum.getValue ();
}
// ---------------------------------------------------------------------------------//
public static int getCRC (final byte[] buffer, int length, int initialValue)
// ---------------------------------------------------------------------------------//
{
int crc = initialValue;
for (int j = 0; j < length; j++)
{
crc = ((crc >>> 8) | (crc << 8)) & 0xFFFF;
crc ^= (buffer[j] & 0xFF);
crc ^= ((crc & 0xFF) >>> 4);
crc ^= (crc << 12) & 0xFFFF;
crc ^= ((crc & 0xFF) << 5) & 0xFFFF;
}
crc &= 0xFFFF;
return crc;
}
// ---------------------------------------------------------------------------------//
public static int crc32 (byte[] buffer, int offset, int length)
// ---------------------------------------------------------------------------------//
{
int crc = 0xFFFFFFFF; // one's complement of zero
int eof = offset + length;
for (int i = offset; i < eof; i++)
crc = crc32_tab[(crc ^ buffer[i]) & 0xFF] ^ (crc >>> 8);
return ~crc; // one's complement
}
static int[] crc32_tab =
{ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d };
}