Changeset 5970

Timestamp:

01/31/08 23:28:32 (5 years ago)

Author:

nori090

Message:

lang/java/jimmy: Little Endian int(4byte)を柔軟に対応してみるテスト

Files:

• lang/java/jimmy/trunk/jimmy/src/main/java/jimmy/ConvertUtil.java (modified) (3 diffs)

lang/java/jimmy/trunk/jimmy/src/main/java/jimmy/ConvertUtil.java

@@ -15 +15 @@
  */
 package jimmy;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 
 import org.apache.commons.codec.binary.Hex;
@@ -59 +62 @@
 
     public static int littleEndianBytes2int( byte[] bs ) {
-        // uncheck byte length. maybe 4bytes!!
-        return ( ( bs[3] & 0xFF ) << 24 ) | ( ( bs[2] & 0xFF ) << 16 ) | ( ( bs[1] & 0xFF ) << 8 ) |
-            ( ( bs[0] & 0xFF ) );
+        /*
+         * 柔軟に対応してみるテスト
+         */
+        int i = ( bs.length > 3 ) ? ( ( bs[3] & 0xFF ) << 24 ) : ( ( 0 & 0xFF ) << 24 );
+        i = i | ( ( bs.length > 2 ) ? ( ( bs[2] & 0xFF ) << 16 ) : ( ( 0 & 0xFF ) << 16 ) );
+        i = i | ( ( bs.length > 1 ) ? ( ( bs[1] & 0xFF ) << 8 ) : ( ( 0 & 0xFF ) << 8 ) );
+        i = i | ( ( bs.length > 0 ) ? ( bs[0] & 0xFF ) : ( 0 & 0xFF ) );
+        return i;
     }
 
@@ -79 +87 @@
         System.out.println( Hex.encodeHex( toLittleEndianBytes( 123456789 ) ) );
         System.out.println( littleEndianBytes2int( new byte[] { 0x15, (byte) 0xCD, 0x5B, 0x07 } ) );
+        try {
+            System.out.println( InetAddress.getByAddress(
+                                                          new byte[] { (byte) 0xC0, (byte) 0xA8, (byte) 0x01,
+                                                              (byte) 0x0A } ).getHostAddress() );
+        }
+        catch ( UnknownHostException e ) {
+            e.printStackTrace();
+        }
+        System.out.println( littleEndianBytes2int( new byte[] { (byte) 0xC0, (byte) 0xA8 } ) );
+        System.out.println( littleEndianBytes2int( new byte[] { (byte) 0xC0, (byte) 0xA8, 0, 0 } ) );
     }
 }