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());
}
}
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);
}
}
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;
}
@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();
}