void read(DataInput in) throws IOException {
setStartPc(in.readUnsignedShort());
setLength(in.readUnsignedShort());
setNameIndex(in.readUnsignedShort());
setTypeIndex(in.readUnsignedShort());
setLocal(in.readUnsignedShort());
}
static Attribute define(ConstantPool cp, String name, int length, DataInput din)
throws IOException {
LineNumberTableAttr lineNumbers = new LineNumberTableAttr(cp);
int size = din.readUnsignedShort();
for (int i = 0; i < size; i++) {
int start_pc = din.readUnsignedShort();
int line_number = din.readUnsignedShort();
lineNumbers.addEntry(new FixedLocation(start_pc), line_number);
}
return lineNumbers;
}
static Attribute define(ConstantPool cp, String name, int length, DataInput din)
throws IOException {
InnerClassesAttr innerClasses = new InnerClassesAttr(cp);
int size = din.readUnsignedShort();
for (int i = 0; i < size; i++) {
int inner_index = din.readUnsignedShort();
int outer_index = din.readUnsignedShort();
int name_index = din.readUnsignedShort();
int af = din.readUnsignedShort();
ConstantClassInfo inner;
if (inner_index == 0) {
inner = null;
} else {
inner = (ConstantClassInfo) cp.getConstant(inner_index);
}
ConstantClassInfo outer;
if (outer_index == 0) {
outer = null;
} else {
outer = (ConstantClassInfo) cp.getConstant(outer_index);
}
ConstantUTFInfo innerName;
if (name_index == 0) {
innerName = null;
} else {
innerName = (ConstantUTFInfo) cp.getConstant(name_index);
}
Info info = new Info(inner, outer, innerName, af);
innerClasses.mInnerClasses.add(info);
}
return innerClasses;
}
public LocalVariableTable_attribute(ConstantPool constantPool, Visitable owner, DataInput in)
throws IOException {
super(constantPool, owner);
int byteCount = in.readInt();
Logger.getLogger(getClass()).debug("Attribute length: " + byteCount);
int localVariableTableLength = in.readUnsignedShort();
Logger.getLogger(getClass())
.debug("Reading " + localVariableTableLength + " local variable(s) ...");
for (int i = 0; i < localVariableTableLength; i++) {
Logger.getLogger(getClass()).debug("Local variable " + i + ":");
localVariables.add(new LocalVariable(this, in));
}
}
private static int readPropertySize(int sizeType, DataInput dataInput) throws IOException {
switch (sizeType) {
case 0:
return 1;
case 1:
return 2;
case 2:
return 4;
case 3:
return 12;
case 4:
return 16;
case 5:
return dataInput.readUnsignedByte();
case 6:
return dataInput.readUnsignedShort();
case 7:
return dataInput.readInt();
default:
throw new IllegalArgumentException();
}
}
protected void readInfo(DataInput din) throws IOException {
u2nameIndex = din.readUnsignedShort();
u2descriptorIndex = din.readUnsignedShort();
}
/**
* Reads from the stream <code>in</code> a representation of a Unicode character string encoded in
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a> format; this string of characters is
* then returned as a <code>String</code>. The details of the modified UTF-8 representation are
* exactly the same as for the <code>readUTF</code> method of <code>DataInput</code>.
*
* @param in a data input stream.
* @return a Unicode string.
* @exception EOFException if the input stream reaches the end before all the bytes.
* @exception IOException if an I/O error occurs.
* @exception UTFDataFormatException if the bytes do not represent a valid modified UTF-8 encoding
* of a Unicode string.
* @see java.io.DataInputStream#readUnsignedShort()
*/
public static final String readUTF(DataInput in) throws IOException {
int utflen = in.readUnsignedShort();
byte[] bytearr = null;
char[] chararr = null;
if (in instanceof DataInputStream) {
DataInputStream dis = (DataInputStream) in;
if (dis.bytearr.length < utflen) {
dis.bytearr = new byte[utflen * 2];
dis.chararr = new char[utflen * 2];
}
chararr = dis.chararr;
bytearr = dis.bytearr;
} else {
bytearr = new byte[utflen];
chararr = new char[utflen];
}
int c, char2, char3;
int count = 0;
int chararr_count = 0;
in.readFully(bytearr, 0, utflen);
while (count < utflen) {
c = (int) bytearr[count] & 0xff;
if (c > 127) break;
count++;
chararr[chararr_count++] = (char) c;
}
while (count < utflen) {
c = (int) bytearr[count] & 0xff;
switch (c >> 4) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
/* 0xxxxxxx*/
count++;
chararr[chararr_count++] = (char) c;
break;
case 12:
case 13:
/* 110x xxxx 10xx xxxx*/
count += 2;
if (count > utflen)
throw new UTFDataFormatException("malformed input: partial character at end");
char2 = (int) bytearr[count - 1];
if ((char2 & 0xC0) != 0x80)
throw new UTFDataFormatException("malformed input around byte " + count);
chararr[chararr_count++] = (char) (((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
/* 1110 xxxx 10xx xxxx 10xx xxxx */
count += 3;
if (count > utflen)
throw new UTFDataFormatException("malformed input: partial character at end");
char2 = (int) bytearr[count - 2];
char3 = (int) bytearr[count - 1];
if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80))
throw new UTFDataFormatException("malformed input around byte " + (count - 1));
chararr[chararr_count++] =
(char) (((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0));
break;
default:
/* 10xx xxxx, 1111 xxxx */
throw new UTFDataFormatException("malformed input around byte " + count);
}
}
// The number of chars produced may be less than utflen
return new String(chararr, 0, chararr_count);
}
void readData(DataInput in) throws IOException {
_classIndex = in.readUnsignedShort();
_nameAndTypeIndex = in.readUnsignedShort();
}
protected void readInfo(DataInput din, ClassFile classFile) throws IOException {
u2sourceFileIndex = din.readUnsignedShort();
}
@Test
public void testRead3SPP16BPSLittleEndian() throws IOException {
FastByteArrayOutputStream out = new FastByteArrayOutputStream(24);
DataOutput dataOut = new LittleEndianDataOutputStream(out);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(4660);
dataOut.writeShort(30292);
dataOut.writeShort(4660);
dataOut.writeShort(4660);
dataOut.writeShort(30292);
dataOut.writeShort(4660);
dataOut.writeShort(-9320);
dataOut.writeShort(-60584);
dataOut.writeShort(-9320);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(-60584);
dataOut.writeShort(-60584);
dataOut.writeShort(-60584);
InputStream in =
new HorizontalDeDifferencingStream(
out.createInputStream(), 4, 3, 16, ByteOrder.LITTLE_ENDIAN);
DataInput dataIn = new LittleEndianDataInputStream(in);
// Row 1
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(4660, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(4660, dataIn.readUnsignedShort());
assertEquals(9320, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(9320, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
// Row 2
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
// EOF
assertEquals(-1, in.read());
}
/**
* Factory method for creating <tt>AttributeInfo</tt> structures.
*
* <p>An <tt>AttributeInfo</tt> of the appropriate subtype from the <tt>attributes</tt> package is
* created unless the type of the attribute is unknown in which case an instance of
* <tt>AttributeInfo</tt> is returned.
*
* <p>
*
* <p>Attributes are skipped if the environment variable <tt>SYSTEM_PROPERTY_SKIP_ATTRIBUTES</tt>
* is set to true.
*
* @param in the <tt>DataInput</tt> from which to read the <tt>AttributeInfo</tt> structure
* @param classFile the parent class file of the structure to be created
* @return the new <tt>AttributeInfo</tt> structure
* @throws InvalidByteCodeException if the byte code is invalid
* @throws IOException if an exception occurs with the <tt>DataInput</tt>
*/
public static AttributeInfo createOrSkip(DataInput in, ClassFile classFile)
throws InvalidByteCodeException, IOException {
AttributeInfo attributeInfo = null;
if (Boolean.getBoolean(SYSTEM_PROPERTY_SKIP_ATTRIBUTES)) {
in.skipBytes(2);
in.skipBytes(in.readInt());
} else {
int attributeNameIndex = in.readUnsignedShort();
int attributeLength = in.readInt();
ConstantUtf8Info cpInfoName = classFile.getConstantPoolUtf8Entry(attributeNameIndex);
String attributeName = null;
if (cpInfoName == null) {
return null;
}
attributeName = cpInfoName.getString();
if (ConstantValueAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new ConstantValueAttribute();
} else if (CodeAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new CodeAttribute();
} else if (ExceptionsAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new ExceptionsAttribute();
} else if (InnerClassesAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new InnerClassesAttribute();
} else if (SyntheticAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new SyntheticAttribute();
} else if (SourceFileAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new SourceFileAttribute();
} else if (LineNumberTableAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new LineNumberTableAttribute();
} else if (LocalVariableTableAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new LocalVariableTableAttribute();
} else if (DeprecatedAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new DeprecatedAttribute();
} else if (EnclosingMethodAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new EnclosingMethodAttribute();
} else if (SignatureAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new SignatureAttribute();
} else if (LocalVariableTypeTableAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new LocalVariableTypeTableAttribute();
} else if (RuntimeVisibleAnnotationsAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new RuntimeVisibleAnnotationsAttribute();
} else if (RuntimeInvisibleAnnotationsAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new RuntimeInvisibleAnnotationsAttribute();
} else if (AnnotationDefaultAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new AnnotationDefaultAttribute();
} else if (BootstrapMethodsAttribute.ATTRIBUTE_NAME.equals(attributeName)) {
attributeInfo = new BootstrapMethodsAttribute(attributeLength);
} else {
attributeInfo = new AttributeInfo(attributeLength);
}
attributeInfo.setAttributeNameIndex(attributeNameIndex);
attributeInfo.setClassFile(classFile);
attributeInfo.read(in);
}
return attributeInfo;
}
