Java example source code file (TestEUC_TW.java)
The TestEUC_TW.java Java example source code
/*
* Copyright (c) 2009, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 6831794 6229811
* @summary Test EUC_TW charset
*/
import java.nio.charset.*;
import java.nio.*;
import java.util.*;
public class TestEUC_TW {
static class Time {
long t;
}
static int iteration = 100;
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;
if (t != null)
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;
}
static CoderResult decodeCR(byte[] bb, Charset cs, boolean testDirect)
throws Exception {
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).flip();
} else {
bbf = ByteBuffer.wrap(bb);
cbf = CharBuffer.allocate(bb.length);
}
return dec.decode(bbf, cbf, true);
}
static byte[] encode(char[] cc, Charset cs, boolean testDirect, Time t)
throws Exception {
ByteBuffer bbf;
CharBuffer cbf;
CharsetEncoder enc = cs.newEncoder();
String csn = cs.name();
if (testDirect) {
bbf = ByteBuffer.allocateDirect(cc.length * 4);
cbf = ByteBuffer.allocateDirect(cc.length * 2).asCharBuffer();
cbf.put(cc).flip();
} else {
bbf = ByteBuffer.allocate(cc.length * 4);
cbf = CharBuffer.wrap(cc);
}
CoderResult cr = null;
long t1 = System.nanoTime()/1000;
for (int i = 0; i < iteration; i++) {
cbf.rewind();
bbf.clear();
enc.reset();
cr = enc.encode(cbf, bbf, true);
}
long t2 = System.nanoTime()/1000;
if (t != null)
t.t = (t2 - t1)/iteration;
if (cr != CoderResult.UNDERFLOW) {
System.out.println("ENC-----------------");
int pos = cbf.position();
System.out.printf(" cr=%s, cbf.pos=%d, cc[pos]=%x%n",
cr.toString(), pos, cc[pos]&0xffff);
throw new RuntimeException("Encoding err: " + csn);
}
byte[] bb = new byte[bbf.position()];
bbf.flip(); bbf.get(bb);
return bb;
}
static CoderResult encodeCR(char[] cc, Charset cs, boolean testDirect)
throws Exception {
ByteBuffer bbf;
CharBuffer cbf;
CharsetEncoder enc = cs.newEncoder();
if (testDirect) {
bbf = ByteBuffer.allocateDirect(cc.length * 4);
cbf = ByteBuffer.allocateDirect(cc.length * 2).asCharBuffer();
cbf.put(cc).flip();
} else {
bbf = ByteBuffer.allocate(cc.length * 4);
cbf = CharBuffer.wrap(cc);
}
return enc.encode(cbf, bbf, true);
}
static char[] getEUC_TWChars(boolean skipNR) {
//CharsetEncoder encOLD = Charset.forName("EUC_TW_OLD").newEncoder();
CharsetEncoder encOLD = new EUC_TW_OLD().newEncoder();
CharsetEncoder enc = Charset.forName("EUC_TW").newEncoder();
char[] cc = new char[0x20000];
char[] c2 = new char[2];
int pos = 0;
int i = 0;
//bmp
for (i = 0; i < 0x10000; i++) {
//SKIP these 3 NR codepoints if compared to EUC_TW
if (skipNR && (i == 0x4ea0 || i == 0x51ab || i == 0x52f9))
continue;
if (encOLD.canEncode((char)i) != enc.canEncode((char)i)) {
System.out.printf(" Err i=%x: old=%b new=%b%n", i,
encOLD.canEncode((char)i),
enc.canEncode((char)i));
throw new RuntimeException("canEncode() err!");
}
if (enc.canEncode((char)i)) {
cc[pos++] = (char)i;
}
}
//supp
CharBuffer cb = CharBuffer.wrap(new char[2]);
for (i = 0x20000; i < 0x30000; i++) {
Character.toChars(i, c2, 0);
cb.clear();cb.put(c2[0]);cb.put(c2[1]);cb.flip();
if (encOLD.canEncode(cb) != enc.canEncode(cb)) {
throw new RuntimeException("canEncode() err!");
}
if (enc.canEncode(cb)) {
//System.out.printf("cp=%x, (%x, %x) %n", i, c2[0] & 0xffff, c2[1] & 0xffff);
cc[pos++] = c2[0];
cc[pos++] = c2[1];
}
}
return Arrays.copyOf(cc, pos);
}
static void checkRoundtrip(Charset cs) throws Exception {
char[] cc = getEUC_TWChars(false);
System.out.printf("Check roundtrip <%s>...", cs.name());
byte[] bb = encode(cc, cs, false, null);
char[] ccO = decode(bb, cs, false, null);
if (!Arrays.equals(cc, ccO)) {
System.out.printf(" non-direct failed");
}
bb = encode(cc, cs, true, null);
ccO = decode(bb, cs, true, null);
if (!Arrays.equals(cc, ccO)) {
System.out.printf(" (direct) failed");
}
System.out.println();
}
static void checkInit(String csn) throws Exception {
System.out.printf("Check init <%s>...%n", csn);
Charset.forName("Big5"); // load in the ExtendedCharsets
long t1 = System.nanoTime()/1000;
Charset cs = Charset.forName(csn);
long t2 = System.nanoTime()/1000;
System.out.printf(" charset :%d%n", t2 - t1);
t1 = System.nanoTime()/1000;
cs.newDecoder();
t2 = System.nanoTime()/1000;
System.out.printf(" new Decoder :%d%n", t2 - t1);
t1 = System.nanoTime()/1000;
cs.newEncoder();
t2 = System.nanoTime()/1000;
System.out.printf(" new Encoder :%d%n", t2 - t1);
}
static void compare(Charset cs1, Charset cs2) throws Exception {
char[] cc = getEUC_TWChars(true);
String csn1 = cs1.name();
String csn2 = cs2.name();
System.out.printf("Diff <%s> <%s>...%n", csn1, csn2);
Time t1 = new Time();
Time t2 = new Time();
byte[] bb1 = encode(cc, cs1, false, t1);
byte[] bb2 = encode(cc, cs2, false, t2);
System.out.printf(" Encoding TimeRatio %s/%s: %d,%d :%f%n",
csn2, csn1,
t2.t, t1.t,
(double)(t2.t)/(t1.t));
if (!Arrays.equals(bb1, bb2)) {
System.out.printf(" encoding failed%n");
}
char[] cc2 = decode(bb1, cs2, false, t2);
char[] cc1 = decode(bb1, cs1, false, t1);
System.out.printf(" Decoding TimeRatio %s/%s: %d,%d :%f%n",
csn2, csn1,
t2.t, t1.t,
(double)(t2.t)/(t1.t));
if (!Arrays.equals(cc1, cc2)) {
System.out.printf(" decoding failed%n");
}
bb1 = encode(cc, cs1, true, t1);
bb2 = encode(cc, cs2, true, t2);
System.out.printf(" Encoding(dir) TimeRatio %s/%s: %d,%d :%f%n",
csn2, csn1,
t2.t, t1.t,
(double)(t2.t)/(t1.t));
if (!Arrays.equals(bb1, bb2))
System.out.printf(" encoding (direct) failed%n");
cc1 = decode(bb1, cs1, true, t1);
cc2 = decode(bb1, cs2, true, t2);
System.out.printf(" Decoding(dir) TimeRatio %s/%s: %d,%d :%f%n",
csn2, csn1,
t2.t, t1.t,
(double)(t2.t)/(t1.t));
if (!Arrays.equals(cc1, cc2)) {
System.out.printf(" decoding (direct) failed%n");
}
}
// The first byte is the length of malformed bytes
static byte[][] malformed = {
//{5, (byte)0xF8, (byte)0x80, (byte)0x80, (byte)0x9F, (byte)0x80, (byte)0xC0 },
};
static void checkMalformed(Charset cs) throws Exception {
boolean failed = false;
String csn = cs.name();
System.out.printf("Check malformed <%s>...%n", csn);
for (boolean direct: new boolean[] {false, true}) {
for (byte[] bins : malformed) {
int mlen = bins[0];
byte[] bin = Arrays.copyOfRange(bins, 1, bins.length);
CoderResult cr = decodeCR(bin, cs, direct);
String ashex = "";
for (int i = 0; i < bin.length; i++) {
if (i > 0) ashex += " ";
ashex += Integer.toBinaryString((int)bin[i] & 0xff);
}
if (!cr.isMalformed()) {
System.out.printf(" FAIL(direct=%b): [%s] not malformed.\n", direct, ashex);
failed = true;
} else if (cr.length() != mlen) {
System.out.printf(" FAIL(direct=%b): [%s] malformed[len=%d].\n", direct, ashex, cr.length());
failed = true;
}
}
}
if (failed)
throw new RuntimeException("Check malformed failed " + csn);
}
static boolean check(CharsetDecoder dec, byte[] bytes, boolean direct, int[] flow) {
int inPos = flow[0];
int inLen = flow[1];
int outPos = flow[2];
int outLen = flow[3];
int expedInPos = flow[4];
int expedOutPos = flow[5];
CoderResult expedCR = (flow[6]==0)?CoderResult.UNDERFLOW
:CoderResult.OVERFLOW;
ByteBuffer bbf;
CharBuffer cbf;
if (direct) {
bbf = ByteBuffer.allocateDirect(inPos + bytes.length);
cbf = ByteBuffer.allocateDirect((outPos + outLen)*2).asCharBuffer();
} else {
bbf = ByteBuffer.allocate(inPos + bytes.length);
cbf = CharBuffer.allocate(outPos + outLen);
}
bbf.position(inPos);
bbf.put(bytes).flip().position(inPos).limit(inPos + inLen);
cbf.position(outPos);
dec.reset();
CoderResult cr = dec.decode(bbf, cbf, false);
if (cr != expedCR ||
bbf.position() != expedInPos ||
cbf.position() != expedOutPos) {
System.out.printf("Expected(direct=%5b): [", direct);
for (int i:flow) System.out.print(" " + i);
System.out.println("] CR=" + cr +
", inPos=" + bbf.position() +
", outPos=" + cbf.position());
return false;
}
return true;
}
static void checkUnderOverflow(Charset cs) throws Exception {
String csn = cs.name();
System.out.printf("Check under/overflow <%s>...%n", csn);
CharsetDecoder dec = cs.newDecoder();
boolean failed = false;
//7f, a1a1, 8ea2a1a1, 8ea3a1a1, 8ea7a1a1
//0 1 2 3 7 11
byte[] bytes = new String("\u007f\u3000\u4e42\u4e28\ud840\udc55").getBytes("EUC_TW");
int inlen = bytes.length;
int MAXOFF = 20;
for (int inoff = 0; inoff < MAXOFF; inoff++) {
for (int outoff = 0; outoff < MAXOFF; outoff++) {
int[][] Flows = {
//inpos, inLen, outPos, outLen, inPosEP, outposEP, under(0)/over(1)
//overflow
{inoff, inlen, outoff, 1, inoff + 1, outoff + 1, 1},
{inoff, inlen, outoff, 2, inoff + 3, outoff + 2, 1},
{inoff, inlen, outoff, 3, inoff + 7, outoff + 3, 1},
{inoff, inlen, outoff, 4, inoff + 11, outoff + 4, 1},
{inoff, inlen, outoff, 5, inoff + 11, outoff + 4, 1},
{inoff, inlen, outoff, 6, inoff + 15, outoff + 6, 0},
//underflow
{inoff, 1, outoff, 6, inoff + 1, outoff + 1, 0},
{inoff, 2, outoff, 6, inoff + 1, outoff + 1, 0},
{inoff, 3, outoff, 6, inoff + 3, outoff + 2, 0},
{inoff, 4, outoff, 6, inoff + 3, outoff + 2, 0},
{inoff, 5, outoff, 6, inoff + 3, outoff + 2, 0},
{inoff, 8, outoff, 6, inoff + 7, outoff + 3, 0},
{inoff, 9, outoff, 6, inoff + 7, outoff + 3, 0},
{inoff, 10, outoff, 6, inoff + 7, outoff + 3, 0},
{inoff, 11, outoff, 6, inoff +11, outoff + 4, 0},
{inoff, 12, outoff, 6, inoff +11, outoff + 4, 0},
{inoff, 15, outoff, 6, inoff +15, outoff + 6, 0},
// 2-byte under/overflow
{inoff, 2, outoff, 1, inoff + 1, outoff + 1, 0},
{inoff, 3, outoff, 1, inoff + 1, outoff + 1, 1},
{inoff, 3, outoff, 2, inoff + 3, outoff + 2, 0},
// 4-byte under/overflow
{inoff, 4, outoff, 2, inoff + 3, outoff + 2, 0},
{inoff, 5, outoff, 2, inoff + 3, outoff + 2, 0},
{inoff, 6, outoff, 2, inoff + 3, outoff + 2, 0},
{inoff, 7, outoff, 2, inoff + 3, outoff + 2, 1},
{inoff, 7, outoff, 3, inoff + 7, outoff + 3, 0},
// 4-byte under/overflow
{inoff, 8, outoff, 3, inoff + 7, outoff + 3, 0},
{inoff, 9, outoff, 3, inoff + 7, outoff + 3, 0},
{inoff, 10, outoff, 3, inoff + 7, outoff + 3, 0},
{inoff, 11, outoff, 3, inoff + 7, outoff + 3, 1},
{inoff, 11, outoff, 4, inoff +11, outoff + 4, 0},
// 4-byte/supp under/overflow
{inoff, 11, outoff, 4, inoff +11, outoff + 4, 0},
{inoff, 12, outoff, 4, inoff +11, outoff + 4, 0},
{inoff, 13, outoff, 4, inoff +11, outoff + 4, 0},
{inoff, 14, outoff, 4, inoff +11, outoff + 4, 0},
{inoff, 15, outoff, 4, inoff +11, outoff + 4, 1},
{inoff, 15, outoff, 5, inoff +11, outoff + 4, 1},
{inoff, 15, outoff, 6, inoff +15, outoff + 6, 0},
};
for (boolean direct: new boolean[] {false, true}) {
for (int[] flow: Flows) {
if (!check(dec, bytes, direct, flow))
failed = true;
}
}}}
if (failed)
throw new RuntimeException("Check under/overflow failed " + csn);
}
public static void main(String[] args) throws Exception {
// be the first one
//checkInit("EUC_TW_OLD");
checkInit("EUC_TW");
Charset euctw = Charset.forName("EUC_TW");
checkRoundtrip(euctw);
compare(euctw, new EUC_TW_OLD());
checkMalformed(euctw);
checkUnderOverflow(euctw);
}
}
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