/*
* Copyright 2008-2013 UnboundID Corp.
* All Rights Reserved.
*/
/*
* Copyright (C) 2008-2013 UnboundID Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses>.
*/
package com.hwlcn.ldap.asn1;
import com.hwlcn.core.annotation.NotMutable;
import com.hwlcn.core.annotation.ThreadSafety;
import com.hwlcn.ldap.util.ThreadSafetyLevel;
import static com.hwlcn.ldap.asn1.ASN1Constants.*;
import static com.hwlcn.ldap.asn1.ASN1Messages.*;
import static com.hwlcn.ldap.util.Debug.*;
/**
* This class provides an ASN.1 long element. It is exactly the same as an
* ASN.1 integer, but it uses a 64-bit representation for the decoded value
* rather than a 32-bit representation.
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class ASN1Long
extends ASN1Element
{
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = -3445506299288414013L;
// The long value for this element.
private final long longValue;
/**
* Creates a new ASN.1 long element with the default BER type and the
* provided long value.
*
* @param longValue The long value to use for this element.
*/
public ASN1Long(final long longValue)
{
super(UNIVERSAL_INTEGER_TYPE, encodeLongValue(longValue));
this.longValue = longValue;
}
/**
* Creates a new ASN.1 long element with the specified BER type and the
* provided long value.
*
* @param type The BER type to use for this element.
* @param longValue The long value to use for this element.
*/
public ASN1Long(final byte type, final long longValue)
{
super(type, encodeLongValue(longValue));
this.longValue = longValue;
}
/**
* Creates a new ASN.1 long element with the specified BER type and the
* provided long and pre-encoded values.
*
* @param type The BER type to use for this element.
* @param longValue The long value to use for this element.
* @param value The pre-encoded value to use for this element.
*/
private ASN1Long(final byte type, final long longValue, final byte[] value)
{
super(type, value);
this.longValue = longValue;
}
/**
* Encodes the provided long value to a byte array suitable for use as the
* value of a long element.
*
* @param longValue The long value to be encoded.
*
* @return A byte array containing the encoded value.
*/
static byte[] encodeLongValue(final long longValue)
{
if (longValue < 0)
{
if ((longValue & 0xFFFFFFFFFFFFFF80L) == 0xFFFFFFFFFFFFFF80L)
{
return new byte[]
{
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFFFFFFFFFFFF8000L) == 0xFFFFFFFFFFFF8000L)
{
return new byte[]
{
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFFFFFFFFFF800000L) == 0xFFFFFFFFFF800000L)
{
return new byte[]
{
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFFFFFFFF80000000L) == 0xFFFFFFFF80000000L)
{
return new byte[]
{
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFFFFFF8000000000L) == 0xFFFFFF8000000000L)
{
return new byte[]
{
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFFFF800000000000L) == 0xFFFF800000000000L)
{
return new byte[]
{
(byte) ((longValue >> 40) & 0xFFL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0xFF80000000000000L) == 0xFF80000000000000L)
{
return new byte[]
{
(byte) ((longValue >> 48) & 0xFFL),
(byte) ((longValue >> 40) & 0xFFL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else
{
return new byte[]
{
(byte) ((longValue >> 56) & 0xFFL),
(byte) ((longValue >> 48) & 0xFFL),
(byte) ((longValue >> 40) & 0xFFL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
}
else
{
if ((longValue & 0x000000000000007FL) == longValue)
{
return new byte[]
{
(byte) (longValue & 0x7FL)
};
}
else if ((longValue & 0x0000000000007FFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 8) & 0x7FL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0x00000000007FFFFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 16) & 0x7FL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0x000000007FFFFFFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 24) & 0x7FL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0x0000007FFFFFFFFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 32) & 0x7FL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0x00007FFFFFFFFFFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 40) & 0x7FL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else if ((longValue & 0x007FFFFFFFFFFFFFL) == longValue)
{
return new byte[]
{
(byte) ((longValue >> 48) & 0x7FL),
(byte) ((longValue >> 40) & 0xFFL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
else
{
return new byte[]
{
(byte) ((longValue >> 56) & 0x7FL),
(byte) ((longValue >> 48) & 0xFFL),
(byte) ((longValue >> 40) & 0xFFL),
(byte) ((longValue >> 32) & 0xFFL),
(byte) ((longValue >> 24) & 0xFFL),
(byte) ((longValue >> 16) & 0xFFL),
(byte) ((longValue >> 8) & 0xFFL),
(byte) (longValue & 0xFFL)
};
}
}
}
/**
* Retrieves the long value for this element.
*
* @return The long value for this element.
*/
public long longValue()
{
return longValue;
}
/**
* Decodes the contents of the provided byte array as a long element.
*
* @param elementBytes The byte array to decode as an ASN.1 long element.
*
* @return The decoded ASN.1 long element.
*
* @throws ASN1Exception If the provided array cannot be decoded as a long
* element.
*/
public static ASN1Long decodeAsLong(final byte[] elementBytes)
throws ASN1Exception
{
try
{
int valueStartPos = 2;
int length = (elementBytes[1] & 0x7F);
if (length != elementBytes[1])
{
final int numLengthBytes = length;
length = 0;
for (int i=0; i < numLengthBytes; i++)
{
length <<= 8;
length |= (elementBytes[valueStartPos++] & 0xFF);
}
}
if ((elementBytes.length - valueStartPos) != length)
{
throw new ASN1Exception(ERR_ELEMENT_LENGTH_MISMATCH.get(length,
(elementBytes.length - valueStartPos)));
}
final byte[] value = new byte[length];
System.arraycopy(elementBytes, valueStartPos, value, 0, length);
long longValue;
switch (value.length)
{
case 1:
longValue = (value[0] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFFFFFF00L;
}
break;
case 2:
longValue = ((value[0] & 0xFFL) << 8) | (value[1] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFFFF0000L;
}
break;
case 3:
longValue = ((value[0] & 0xFFL) << 16) | ((value[1] & 0xFFL) << 8) |
(value[2] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFF000000L;
}
break;
case 4:
longValue = ((value[0] & 0xFFL) << 24) | ((value[1] & 0xFFL) << 16) |
((value[2] & 0xFFL) << 8) | (value[3] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFF00000000L;
}
break;
case 5:
longValue = ((value[0] & 0xFFL) << 32) | ((value[1] & 0xFFL) << 24) |
((value[2] & 0xFFL) << 16) | ((value[3] & 0xFFL) << 8) |
(value[4] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFF0000000000L;
}
break;
case 6:
longValue = ((value[0] & 0xFFL) << 40) | ((value[1] & 0xFFL) << 32) |
((value[2] & 0xFFL) << 24) | ((value[3] & 0xFFL) << 16) |
((value[4] & 0xFFL) << 8) | (value[5] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFF000000000000L;
}
break;
case 7:
longValue = ((value[0] & 0xFFL) << 48) | ((value[1] & 0xFFL) << 40) |
((value[2] & 0xFFL) << 32) | ((value[3] & 0xFFL) << 24) |
((value[4] & 0xFFL) << 16) | ((value[5] & 0xFFL) << 8) |
(value[6] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFF00000000000000L;
}
break;
case 8:
longValue = ((value[0] & 0xFFL) << 56) | ((value[1] & 0xFFL) << 48) |
((value[2] & 0xFFL) << 40) | ((value[3] & 0xFFL) << 32) |
((value[4] & 0xFFL) << 24) | ((value[5] & 0xFFL) << 16) |
((value[6] & 0xFFL) << 8) | (value[7] & 0xFFL);
break;
default:
throw new ASN1Exception(ERR_LONG_INVALID_LENGTH.get(value.length));
}
return new ASN1Long(elementBytes[0], longValue, value);
}
catch (final ASN1Exception ae)
{
debugException(ae);
throw ae;
}
catch (final Exception e)
{
debugException(e);
throw new ASN1Exception(ERR_ELEMENT_DECODE_EXCEPTION.get(e), e);
}
}
/**
* Decodes the provided ASN.1 element as a long element.
*
* @param element The ASN.1 element to be decoded.
*
* @return The decoded ASN.1 long element.
*
* @throws ASN1Exception If the provided element cannot be decoded as a long
* element.
*/
public static ASN1Long decodeAsLong(final ASN1Element element)
throws ASN1Exception
{
long longValue;
final byte[] value = element.getValue();
switch (value.length)
{
case 1:
longValue = (value[0] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFFFFFF00L;
}
break;
case 2:
longValue = ((value[0] & 0xFFL) << 8) | (value[1] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFFFF0000L;
}
break;
case 3:
longValue = ((value[0] & 0xFFL) << 16) | ((value[1] & 0xFFL) << 8) |
(value[2] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFFFF000000L;
}
break;
case 4:
longValue = ((value[0] & 0xFFL) << 24) | ((value[1] & 0xFFL) << 16) |
((value[2] & 0xFFL) << 8) | (value[3] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFFFF00000000L;
}
break;
case 5:
longValue = ((value[0] & 0xFFL) << 32) | ((value[1] & 0xFFL) << 24) |
((value[2] & 0xFFL) << 16) | ((value[3] & 0xFFL) << 8) |
(value[4] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFFFF0000000000L;
}
break;
case 6:
longValue = ((value[0] & 0xFFL) << 40) | ((value[1] & 0xFFL) << 32) |
((value[2] & 0xFFL) << 24) | ((value[3] & 0xFFL) << 16) |
((value[4] & 0xFFL) << 8) | (value[5] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFFFF000000000000L;
}
break;
case 7:
longValue = ((value[0] & 0xFFL) << 48) | ((value[1] & 0xFFL) << 40) |
((value[2] & 0xFFL) << 32) | ((value[3] & 0xFFL) << 24) |
((value[4] & 0xFFL) << 16) | ((value[5] & 0xFFL) << 8) |
(value[6] & 0xFFL);
if ((value[0] & 0x80L) != 0x00L)
{
longValue |= 0xFF00000000000000L;
}
break;
case 8:
longValue = ((value[0] & 0xFFL) << 56) | ((value[1] & 0xFFL) << 48) |
((value[2] & 0xFFL) << 40) | ((value[3] & 0xFFL) << 32) |
((value[4] & 0xFFL) << 24) | ((value[5] & 0xFFL) << 16) |
((value[6] & 0xFFL) << 8) | (value[7] & 0xFFL);
break;
default:
throw new ASN1Exception(ERR_LONG_INVALID_LENGTH.get(value.length));
}
return new ASN1Long(element.getType(), longValue, value);
}
/**
* Appends a string representation of this ASN.1 element to the provided
* buffer.
*
* @param buffer The buffer to which to append the information.
*/
@Override()
public void toString(final StringBuilder buffer)
{
buffer.append(longValue);
}
}