7143629: JDK jar/zip code should use unsigned library support

Reviewed-by: sherman

src/share/classes/java/util/jar/JarOutputStream.java

 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -135,7 +135,7 @@ class JarOutputStream extends ZipOutputStream {
      * The bytes are assumed to be in Intel (little-endian) byte order.
      */
     private static int get16(byte[] b, int off) {
-        return (b[off] & 0xff) | ((b[off+1] & 0xff) << 8);
+        return Byte.toUnsignedInt(b[off]) | ( Byte.toUnsignedInt(b[off+1]) << 8);
     }
 
     /*

src/share/classes/java/util/jar/Manifest.java

 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -339,7 +339,7 @@ public class Manifest implements Cloneable {
                     return -1;
                 }
             }
-            return buf[pos++] & 0xff;
+            return Byte.toUnsignedInt(buf[pos++]);
         }
 
         public int read(byte[] b, int off, int len) throws IOException {

src/share/classes/java/util/zip/InflaterInputStream.java

 /*
- * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -119,7 +119,7 @@ class InflaterInputStream extends FilterInputStream {
      */
     public int read() throws IOException {
         ensureOpen();
-        return read(singleByteBuf, 0, 1) == -1 ? -1 : singleByteBuf[0] & 0xff;
+        return read(singleByteBuf, 0, 1) == -1 ? -1 : Byte.toUnsignedInt(singleByteBuf[0]);
     }
 
     /**

src/share/classes/java/util/zip/ZipInputStream.java

 /*
- * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -435,7 +435,7 @@ class ZipInputStream extends InflaterInputStream implements ZipConstants {
      * The bytes are assumed to be in Intel (little-endian) byte order.
      */
     private static final int get16(byte b[], int off) {
-        return (b[off] & 0xff) | ((b[off+1] & 0xff) << 8);
+        return Byte.toUnsignedInt(b[off]) | (Byte.toUnsignedInt(b[off+1]) << 8);
     }
 
     /*

src/share/demo/nio/zipfs/src/com/sun/nio/zipfs/ZipConstants.java

@@ -185,11 +185,11 @@ class ZipConstants {
      */
     ///////////////////////////////////////////////////////
     static final int CH(byte[] b, int n) {
-       return b[n] & 0xff;
+        return Byte.toUnsignedInt(b[n]);
     }
 
     static final int SH(byte[] b, int n) {
-        return (b[n] & 0xff) | ((b[n + 1] & 0xff) << 8);
+        return Byte.toUnsignedInt(b[n]) | (Byte.toUnsignedInt(b[n + 1]) << 8);
     }
 
     static final long LG(byte[] b, int n) {