old-autovect-branch/libjava/gnu/gcj/convert/Input_UnicodeLittle.java

   1 /* Copyright (C) 2004  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 package gnu.gcj.convert;
  10
  11 public class Input_UnicodeLittle extends BytesToUnicode
  12 {
  13   /** 0, 8, or 16 bits of a partially constructed character. */
  14   char partial;
  15   /** How many bytes of partial are valid. */
  16   int partial_count;
  17
  18   public String getName() { return "UnicodeLittle"; }
  19
  20   public int read (char[] outbuffer, int outpos, int count)
  21   {
  22     int origcount = count;
  23     for (;;)
  24       {
  25         if (partial_count == 2)
  26           {
  27             if (count == 0)
  28               break;
  29             if (partial == 0xFEFF)
  30               ; // drop byte order mark
  31             // else if (partial >= 0xFFFe)  ERROR;
  32             else
  33               outbuffer[outpos++] = partial;
  34             count--;
  35             partial_count = 0;
  36             partial = 0;
  37           }
  38         else if (inpos >= inlength)
  39           break;
  40         else
  41           {
  42             int b = inbuffer[inpos++] & 0xFF;
  43             partial = (char) (partial | (b << (8 * partial_count)));
  44             partial_count++;
  45           }
  46       }
  47     return origcount - count;
  48   }
  49 }