Author: akarasulu
Date: Sun Jul 11 22:22:58 2004
New Revision: 22829
Modified:
incubator/directory/snickers/trunk/ber-codec/src/java/org/apache/snickers/ber/primitives/PrimitiveUtils.java
Log:
implemented a java primitive encode operation
Modified:
incubator/directory/snickers/trunk/ber-codec/src/java/org/apache/snickers/ber/primitives/PrimitiveUtils.java
==============================================================================
---
incubator/directory/snickers/trunk/ber-codec/src/java/org/apache/snickers/ber/primitives/PrimitiveUtils.java
(original)
+++
incubator/directory/snickers/trunk/ber-codec/src/java/org/apache/snickers/ber/primitives/PrimitiveUtils.java
Sun Jul 11 22:22:58 2004
@@ -17,9 +17,6 @@
package org.apache.snickers.ber.primitives ;
-import org.apache.commons.lang.NotImplementedException;
-
-
/**
* Utilities for decoding and encoding primitive constructs.
*
@@ -28,6 +25,16 @@
*/
public class PrimitiveUtils
{
+ private static final int ONE_BYTE_MAX = (1<<7)-1;
+ private static final int ONE_BYTE_MIN = -(1<<7);
+ private static final int TWO_BYTE_MAX = (1<<15)-1;
+ private static final int TWO_BYTE_MIN = -(1<<15);
+ private static final int THREE_BYTE_MAX = (1<<23)-1;
+ private static final int THREE_BYTE_MIN = -(1<<23);
+ private static final int FOUR_BYTE_MAX = Integer.MAX_VALUE;
+ private static final int FOUR_BYTE_MIN = Integer.MIN_VALUE;
+
+
public static boolean berDecodeBoolean( byte value )
{
if ( value == 0 )
@@ -61,14 +68,36 @@
public static byte[] encodeInt( int source )
{
- throw new NotImplementedException( "STUB" ) ;
-// byte[] encoded = null;
-// s
-// if ( source > -129 && source < 128 )
-// {
-// }
-//
-// return encoded;
+ byte[] encoded = null;
+
+ if ( source >= ONE_BYTE_MIN && source <= ONE_BYTE_MAX )
+ {
+ encoded = new byte[1];
+ encoded[0] = ( byte ) source;
+ }
+ else if ( source >= TWO_BYTE_MIN && source <= TWO_BYTE_MAX )
+ {
+ encoded = new byte[2];
+ encoded[1] = ( byte ) source;
+ encoded[0] = ( byte ) ( source >> 8 );
+ }
+ else if ( source >= THREE_BYTE_MIN && source <= THREE_BYTE_MAX )
+ {
+ encoded = new byte[3];
+ encoded[2] = ( byte ) source;
+ encoded[1] = ( byte ) ( source >> 8 );
+ encoded[0] = ( byte ) ( source >> 16 );
+ }
+ else if ( source >= FOUR_BYTE_MIN && source <= FOUR_BYTE_MAX )
+ {
+ encoded = new byte[4];
+ encoded[3] = ( byte ) source;
+ encoded[2] = ( byte ) ( source >> 8 );
+ encoded[1] = ( byte ) ( source >> 16 );
+ encoded[0] = ( byte ) ( source >> 24 );
+ }
+
+ return encoded;
}
@@ -102,7 +131,7 @@
}
else
{
- value |= bites[offset+0] ;
+ value |= bites[offset+0] & 0x000000ff ;
}
break ;
@@ -116,7 +145,7 @@
value |= ( bites[offset+0] << 8 ) ;
}
- value |= bites[offset+1] ;
+ value |= ( bites[offset+1] & 0x000000ff );
break ;
case( 3 ):
if ( ( bites[offset+0] & 0x80 ) == 0x80 )
@@ -128,14 +157,14 @@
value |= ( bites[offset+0] << 16 ) ;
}
- value |= ( bites[offset+1] << 8 ) ;
- value |= bites[offset+2] ;
+ value |= ( bites[offset+1] << 8 ) & 0x0000ff00;
+ value |= bites[offset+2] & 0x000000ff;
break ;
case( 4 ):
- value |= ( bites[offset+0] << 24 ) ;
- value |= ( bites[offset+1] << 16 ) ;
- value |= ( bites[offset+2] << 8 ) ;
- value |= bites[offset+3] ;
+ value |= ( bites[offset+0] << 24 ) & 0xff000000;
+ value |= ( bites[offset+1] << 16 ) & 0x00ff0000;
+ value |= ( bites[offset+2] << 8 ) & 0x0000ff00;
+ value |= bites[offset+3] & 0x000000ff;
break ;
default:
throw new IllegalArgumentException(
