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package sun.io;
Class for converting bytes to characters for the EUC-JP encoding in
linux. This converter supports the JIS0201 and the JIS0208 encoding and
omits support for the JIS212 encoding.
Author: Naveen Sanjeeva
/**
* Class for converting bytes to characters for the EUC-JP encoding in
* linux. This converter supports the JIS0201 and the JIS0208 encoding and
* omits support for the JIS212 encoding.
*
* @author Naveen Sanjeeva
*/
public class ByteToCharEUC_JP_LINUX extends ByteToCharJIS0208 {
private byte savedSecond = 0;
ByteToCharJIS0201 bcJIS0201 = new ByteToCharJIS0201();
public ByteToCharEUC_JP_LINUX() {
super();
start = 0xA1;
end = 0xFE;
savedSecond = 0;
}
public int flush(char[] output, int outStart, int outEnd)
throws MalformedInputException
{
if (savedSecond != 0) {
reset();
throw new MalformedInputException();
}
reset();
return 0;
}
Resets the converter.
Call this method to reset the converter to its initial state
/**
* Resets the converter.
* Call this method to reset the converter to its initial state
*/
public void reset() {
super.reset();
savedSecond = 0;
}
public String getCharacterEncoding() {
return "EUC_JP_LINUX";
}
protected char convSingleByte(int b) {
if (b < 0 || b > 0x7F)
return REPLACE_CHAR;
return bcJIS0201.getUnicode(b);
}
protected char getUnicode(int byte1, int byte2) {
if (byte1 == 0x8E) {
return bcJIS0201.getUnicode(byte2 - 256);
}
// Fix for bug 4121358 - similar fix for bug 4117820 put
// into ByteToCharDoubleByte.getUnicode()
if (((byte1 < 0) || (byte1 > index1.length))
|| ((byte2 < start) || (byte2 > end)))
return REPLACE_CHAR;
int n = (index1[byte1 - 0x80] & 0xf) * (end - start + 1)
+ (byte2 - start);
return index2[index1[byte1 - 0x80] >> 4].charAt(n);
}
Converts sequences of bytes to characters.
Conversions that result in Exceptions can be restarted by calling
convert again, with appropriately modified parameters.
Params: - input – byte array containing text in Double/single Byte
- inStart – offset in input array
- inEnd – offset of last byte to be converted
- output – character array to receive conversion result
- outStart – starting offset
- outEnd – offset of last byte to be written to
Returns: the characters written to output. @throw UnsupportedCharacterException for any bytes
that cannot be converted to the external character set.
/**
* Converts sequences of bytes to characters.
* Conversions that result in Exceptions can be restarted by calling
* convert again, with appropriately modified parameters.
* @return the characters written to output.
* @param input byte array containing text in Double/single Byte
* @param inStart offset in input array
* @param inEnd offset of last byte to be converted
* @param output character array to receive conversion result
* @param outStart starting offset
* @param outEnd offset of last byte to be written to
* @throw UnsupportedCharacterException for any bytes
* that cannot be converted to the external character set.
*/
public int convert(byte[] input, int inOff, int inEnd,
char[] output, int outOff, int outEnd)
throws UnknownCharacterException,
ConversionBufferFullException
{
char outputChar = REPLACE_CHAR;
int inputSize = 0; // Size of input
// Record beginning offsets
charOff = outOff;
byteOff = inOff;
// Loop until we hit the end of the input
while (byteOff < inEnd) {
int byte1, byte2;
if (savedByte == 0) {
byte1 = input[byteOff];
inputSize = 1;
} else {
byte1 = savedByte;
savedByte = 0;
inputSize = 0;
}
outputChar = convSingleByte(byte1);
if (outputChar == REPLACE_CHAR) { // Multibyte char
if ((byte1 & 0xff) != 0x8F) { // JIS0208
if (byteOff + inputSize >= inEnd) {
// split in the middle of a character
// save the first byte for next time around
savedByte = (byte) byte1;
byteOff += inputSize;
break;
}
byte1 &= 0xff;
byte2 = input[byteOff + inputSize] & 0xff;
inputSize++;
outputChar = getUnicode(byte1, byte2);
} else if ((byte1 & 0xff) == 0x8F) { // JIS0212
// Handling of 3-byte sequences for this converter involves
// just ignoring the relevant bytes and returning a
// suitable substitute char if one exists.
if (byteOff + inputSize + 1 >= inEnd) {
// split in the middle of a character
// save the first 2 bytes for next time around
savedByte = (byte) byte1;
byteOff += inputSize;
if (byteOff < inEnd) {
savedSecond = input[byteOff];
byteOff++;
}
break;
}
// Skip over the saved bytes if any
if (savedSecond != 0) {
savedSecond = 0;
} else {
inputSize++;
}
inputSize++;
}
}
if (outputChar == REPLACE_CHAR) {
if (subMode)
outputChar = subChars[0];
else {
badInputLength = inputSize;
throw new UnknownCharacterException();
}
}
if (charOff >= outEnd)
throw new ConversionBufferFullException();
output[charOff++] = outputChar;
byteOff += inputSize;
}
return charOff - outOff;
}
}