public static void main(String[] arguments) {
   try {
     // read byte data into a byte buffer
     String data = "friends.dat";
     FileInputStream inData = new FileInputStream(data);
     FileChannel inChannel = inData.getChannel();
     long inSize = inChannel.size();
     ByteBuffer source = ByteBuffer.allocate((int) inSize);
     inChannel.read(source, 0);
     source.position(0);
     System.out.println("Original byte data:");
     for (int i = 0; source.remaining() > 0; i++) {
       System.out.print(source.get() + " ");
     }
     // convert byte data into character data
     source.position(0);
     Charset ascii = Charset.forName("US-ASCII");
     CharsetDecoder toAscii = ascii.newDecoder();
     CharBuffer destination = toAscii.decode(source);
     destination.position(0);
     System.out.println("\n\nNew character data:");
     for (int i = 0; destination.remaining() > 0; i++) {
       System.out.print(destination.get());
     }
     System.out.println();
   } catch (FileNotFoundException fne) {
     System.out.println(fne.getMessage());
   } catch (IOException ioe) {
     System.out.println(ioe.getMessage());
   }
 }
示例#2
0
  protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {
    int mark = src.position();

    if (needsMark) {
      if (dst.remaining() < 2) return CoderResult.OVERFLOW;
      put(BYTE_ORDER_MARK, dst);
      needsMark = false;
    }

    try {
      while (src.hasRemaining()) {
        char c = src.get();
        if (!Surrogate.is(c)) {
          if (dst.remaining() < 2) return CoderResult.OVERFLOW;
          mark++;
          put(c, dst);
          continue;
        }
        int d = sgp.parse(c, src);
        if (d < 0) return sgp.error();
        if (dst.remaining() < 4) return CoderResult.OVERFLOW;
        mark += 2;
        put(Surrogate.high(d), dst);
        put(Surrogate.low(d), dst);
      }
      return CoderResult.UNDERFLOW;
    } finally {
      src.position(mark);
    }
  }
示例#3
0
 static char[] decode(byte[] bb, Charset cs, boolean testDirect, Time t) throws Exception {
   String csn = cs.name();
   CharsetDecoder dec = cs.newDecoder();
   ByteBuffer bbf;
   CharBuffer cbf;
   if (testDirect) {
     bbf = ByteBuffer.allocateDirect(bb.length);
     cbf = ByteBuffer.allocateDirect(bb.length * 2).asCharBuffer();
     bbf.put(bb);
   } else {
     bbf = ByteBuffer.wrap(bb);
     cbf = CharBuffer.allocate(bb.length);
   }
   CoderResult cr = null;
   long t1 = System.nanoTime() / 1000;
   for (int i = 0; i < iteration; i++) {
     bbf.rewind();
     cbf.clear();
     dec.reset();
     cr = dec.decode(bbf, cbf, true);
   }
   long t2 = System.nanoTime() / 1000;
   t.t = (t2 - t1) / iteration;
   if (cr != CoderResult.UNDERFLOW) {
     System.out.println("DEC-----------------");
     int pos = bbf.position();
     System.out.printf(
         "  cr=%s, bbf.pos=%d, bb[pos]=%x,%x,%x,%x%n",
         cr.toString(),
         pos,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff,
         bb[pos++] & 0xff);
     throw new RuntimeException("Decoding err: " + csn);
   }
   char[] cc = new char[cbf.position()];
   cbf.flip();
   cbf.get(cc);
   return cc;
 }
示例#4
0
 @Override
 int read(final TextInput ti) throws IOException {
   int c = -1;
   while (++c < 4) {
     final int ch = ti.readByte();
     if (ch < 0) break;
     cache[c] = (byte) ch;
     outc.position(0);
     inc.position(0);
     inc.limit(c + 1);
     csd.reset();
     final CoderResult cr = csd.decode(inc, outc, true);
     if (cr.isMalformed()) continue;
     // return character
     int i = 0;
     final int os = outc.position();
     for (int o = 0; o < os; ++o) i |= outc.get(o) << (o << 3);
     return i;
   }
   return c == 0 ? -1 : invalid();
 }