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package jdeserialize;
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import java.io.*;
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/**
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* Represents a serialized string object. This is primarily used in serialized streams;
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* however, it is also used internally by other objects, since string objects have
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* handles as well.
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*/
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public class stringobj extends contentbase {
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public String value;
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private int readorthrow(ByteArrayInputStream bais) throws EOFException {
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int x = bais.read();
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if(x == -1) {
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throw new EOFException("unexpected eof in modified utf-8 string");
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}
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return x;
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}
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public String toString() {
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return "[String " + jdeserialize.hex(handle) + ": \"" + value + "\"]";
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}
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/**
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* Constructor.
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*
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* @param handle the string object's handle
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* @param data the bytes corresponding to the string
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* @throws IOException if an I/O or validity error occurs
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*/
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public stringobj(int handle, byte[] data) throws IOException {
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super(contenttype.STRING);
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this.handle = handle;
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ByteArrayInputStream bais = new ByteArrayInputStream(data);
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StringBuffer sb = new StringBuffer();
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while(true) {
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int ba = bais.read();
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if(ba == -1) {
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break;
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}
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if((ba & 0x80) == 0) { /* U+0001..U+007F */
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if(ba == 0) {
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throw new IOException("improperly-encoded null in modified UTF8 string!");
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}
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sb.append((char)ba);
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} else if((ba & 0xf0) == 0xe0) { /* U+0800..U+FFFF */
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int bb = readorthrow(bais);
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if((bb & 0xc0) != 0x80) {
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throw new IOException("byte b in 0800-FFFF seq doesn't begin with correct prefix");
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}
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int bc = readorthrow(bais);
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if((bc & 0xc0) != 0x80) {
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throw new IOException("byte c in 0800-FFFF seq doesn't begin with correct prefix");
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}
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int cp =
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((ba & 0xf) << 12)
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| ((bb & 0x3f) << 6)
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| (bc & 0x3f);
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sb.append((char)cp);
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} else if((ba & 0xe0) == 0xc0) { /* U+0080..U+07FF */
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int bb = readorthrow(bais);
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if((bb & 0xc0) != 0x80) {
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throw new IOException("byte b in 0080-07FF seq doesn't begin with correct prefix");
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}
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int cp = ((ba & 0x1f) << 6) | (bb & 0x3f);
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sb.append((char)cp);
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} else {
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throw new IOException("invalid byte in modified utf-8 string: " + jdeserialize.hex(ba));
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}
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}
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this.value = sb.toString();
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}
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}
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