public static void main(String[] arg) throws Exception {
String string = "Now \u0690xxxxxxxx";
System.err.println(string);
byte[] bytes = string.getBytes(StandardCharsets.UTF_8);
System.err.println(new String(bytes));
System.err.println(bytes.length);
long calc = 0;
Utf8StringBuffer strbuf = new Utf8StringBuffer(bytes.length);
for (int i = 0; i < 10; i++) {
long s1 = System.currentTimeMillis();
for (int j = 1000000; j-- > 0; ) {
calc += new String(bytes, 0, bytes.length, StandardCharsets.UTF_8).hashCode();
}
long s2 = System.currentTimeMillis();
for (int j = 1000000; j-- > 0; ) {
calc += StringUtil.toUTF8String(bytes, 0, bytes.length).hashCode();
}
long s3 = System.currentTimeMillis();
for (int j = 1000000; j-- > 0; ) {
Utf8StringBuffer buffer = new Utf8StringBuffer(bytes.length);
buffer.append(bytes, 0, bytes.length);
calc += buffer.toString().hashCode();
}
long s4 = System.currentTimeMillis();
for (int j = 1000000; j-- > 0; ) {
strbuf.reset();
strbuf.append(bytes, 0, bytes.length);
calc += strbuf.toString().hashCode();
}
long s5 = System.currentTimeMillis();
System.err.println((s2 - s1) + ", " + (s3 - s2) + ", " + (s4 - s3) + ", " + (s5 - s4));
}
System.err.println(calc);
}
@Test
public void testUtfStringBuffer() throws Exception {
String source = "abcd012345\n\r\u0000\u00a4\u10fb\ufffdjetty";
byte[] bytes = source.getBytes(StringUtil.__UTF8);
Utf8StringBuffer buffer = new Utf8StringBuffer();
for (byte aByte : bytes) buffer.append(aByte);
assertEquals(source, buffer.toString());
assertTrue(buffer.toString().endsWith("jetty"));
}
@Test(expected = IllegalArgumentException.class)
public void testUtf8WithMissingByte() throws Exception {
String source = "abc\u10fb";
byte[] bytes = source.getBytes(StringUtil.__UTF8);
Utf8StringBuffer buffer = new Utf8StringBuffer();
for (int i = 0; i < bytes.length - 1; i++) buffer.append(bytes[i]);
buffer.toString();
}
@Test
public void testUTF32codes() throws Exception {
String source = "\uD842\uDF9F";
byte[] bytes = source.getBytes("UTF-8");
String jvmcheck = new String(bytes, 0, bytes.length, "UTF-8");
assertEquals(source, jvmcheck);
Utf8StringBuffer buffer = new Utf8StringBuffer();
buffer.append(bytes, 0, bytes.length);
String result = buffer.toString();
assertEquals(source, result);
}
@Test
public void testGermanUmlauts() throws Exception {
byte[] bytes = new byte[6];
bytes[0] = (byte) 0xC3;
bytes[1] = (byte) 0xBC;
bytes[2] = (byte) 0xC3;
bytes[3] = (byte) 0xB6;
bytes[4] = (byte) 0xC3;
bytes[5] = (byte) 0xA4;
Utf8StringBuffer buffer = new Utf8StringBuffer();
for (int i = 0; i < bytes.length; i++) buffer.append(bytes[i]);
assertEquals("\u00FC\u00F6\u00E4", buffer.toString());
}
/**
* Decode String with % encoding. This method makes the assumption that the majority of calls will
* need no decoding.
*/
public static String decodeString(String encoded, int offset, int length, String charset) {
if (charset == null || StringUtil.isUTF8(charset)) {
Utf8StringBuffer buffer = null;
for (int i = 0; i < length; i++) {
char c = encoded.charAt(offset + i);
if (c < 0 || c > 0xff) {
if (buffer == null) {
buffer = new Utf8StringBuffer(length);
buffer.getStringBuffer().append(encoded, offset, offset + i + 1);
} else buffer.getStringBuffer().append(c);
} else if (c == '+') {
if (buffer == null) {
buffer = new Utf8StringBuffer(length);
buffer.getStringBuffer().append(encoded, offset, offset + i);
}
buffer.getStringBuffer().append(' ');
} else if (c == '%' && (i + 2) < length) {
if (buffer == null) {
buffer = new Utf8StringBuffer(length);
buffer.getStringBuffer().append(encoded, offset, offset + i);
}
try {
byte b = (byte) TypeUtil.parseInt(encoded, offset + i + 1, 2, 16);
buffer.append(b);
i += 2;
} catch (NumberFormatException nfe) {
buffer.getStringBuffer().append('%');
}
} else if (buffer != null) buffer.getStringBuffer().append(c);
}
if (buffer == null) {
if (offset == 0 && encoded.length() == length) return encoded;
return encoded.substring(offset, offset + length);
}
return buffer.toString();
} else {
StringBuffer buffer = null;
try {
for (int i = 0; i < length; i++) {
char c = encoded.charAt(offset + i);
if (c < 0 || c > 0xff) {
if (buffer == null) {
buffer = new StringBuffer(length);
buffer.append(encoded, offset, offset + i + 1);
} else buffer.append(c);
} else if (c == '+') {
if (buffer == null) {
buffer = new StringBuffer(length);
buffer.append(encoded, offset, offset + i);
}
buffer.append(' ');
} else if (c == '%' && (i + 2) < length) {
if (buffer == null) {
buffer = new StringBuffer(length);
buffer.append(encoded, offset, offset + i);
}
byte[] ba = new byte[length];
int n = 0;
while (c >= 0 && c <= 0xff) {
if (c == '%') {
if (i + 2 < length) {
try {
ba[n++] = (byte) TypeUtil.parseInt(encoded, offset + i + 1, 2, 16);
i += 3;
} catch (NumberFormatException nfe) {
ba[n - 1] = (byte) '%';
for (char next; ((next = encoded.charAt(++i + offset)) != '%'); )
ba[n++] = (byte) (next == '+' ? ' ' : next);
}
} else {
ba[n++] = (byte) '%';
i++;
}
} else if (c == '+') {
ba[n++] = (byte) ' ';
i++;
} else {
ba[n++] = (byte) c;
i++;
}
if (i >= length) break;
c = encoded.charAt(offset + i);
}
i--;
buffer.append(new String(ba, 0, n, charset));
} else if (buffer != null) buffer.append(c);
}
if (buffer == null) {
if (offset == 0 && encoded.length() == length) return encoded;
return encoded.substring(offset, offset + length);
}
return buffer.toString();
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}