Input_UnicodeBig.java: New class..

* gnu/gcj/convert/Input_UnicodeBig.java:  New class..
	* gnu/gcj/convert/Input_UnicodeLittle.java:  New class.
	* Makefile.am:  Update accordingly.
	* gnu/gcj/convert/IOConverter.java:  Define "utf-16le" and "utf16be"
	as aliases for UnicodeLittle and UnicodeBig.

From-SVN: r79723

libjava/gnu/gcj/convert/Input_UnicodeLittle.java

@@ -0,0 +1,49 @@
+/* Copyright (C) 2004  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.convert;
+
+public class Input_UnicodeLittle extends BytesToUnicode
+{
+  /** 0, 8, or 16 bits of a partially constructed character. */
+  char partial;
+  /** How many bytes of partial are valid. */
+  int partial_count;
+
+  public String getName() { return "UnicodeLittle"; }
+
+  public int read (char[] outbuffer, int outpos, int count)
+  {
+    int origcount = count;
+    for (;;)
+      {
+	if (partial_count == 2)
+	  {
+	    if (count == 0)
+	      break;
+	    if (partial == 0xFEFF)
+	      ; // drop byte order mark
+	    // else if (partial >= 0xFFFe)  ERROR;
+	    else
+	      outbuffer[outpos++] = partial;
+	    count--;
+	    partial_count = 0;
+	    partial = 0;
+	  }
+	else if (inpos >= inlength)
+	  break;
+	else
+	  {
+	    int b = inbuffer[inpos++] & 0xFF;
+	    partial = (char) (partial | (b << (8 * partial_count)));
+	    partial_count++;
+	  }
+      }
+    return origcount - count;
+  }
+}