Java ClsUtil.readU1方法代码示例

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private void initConstantPool() throws ClsFormatException {
  if (myConstantPoolOffsets == null){
    BytePointer ptr = new BytePointer(getData(), 0);
    ConstantPoolIterator iterator = new ConstantPoolIterator(ptr);
    myConstantPoolOffsets = new int[iterator.getEntryCount()];
    myConstantPoolOffsets[0] = iterator.getCurrentOffset();
    int index = 1;
    while (iterator.hasMoreEntries()) {
      int tag = ClsUtil.readU1(ptr);
      if (tag == ClsUtil.CONSTANT_Long || tag == ClsUtil.CONSTANT_Double) {
        myConstantPoolOffsets[index++] = ptr.offset + 8; // takes 2 entries!
      }
      iterator.next();
      myConstantPoolOffsets[index++] = iterator.getCurrentOffset();
    }
  }
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private ConstantValue readConstant(final BytePointer ptr) throws ClsFormatException {
  final int tag = ClsUtil.readU1(ptr);
  switch (tag) {
    case ClsUtil.CONSTANT_Integer :
      int value = ClsUtil.readU4(ptr);
      return new IntegerConstantValue(value);
    case ClsUtil.CONSTANT_Float:
      float floatValue = ClsUtil.readFloat(ptr);
      return new FloatConstantValue(floatValue);
    case ClsUtil.CONSTANT_Long :
      int high = ClsUtil.readU4(ptr);
      int low = ClsUtil.readU4(ptr);
      long v = ((long)high << 32) | (low & 0xFFFFFFFFL);
      return new LongConstantValue(v);
    case ClsUtil.CONSTANT_Double :
      double doubleValue = ClsUtil.readDouble(ptr);
      return new DoubleConstantValue(doubleValue);
    case ClsUtil.CONSTANT_String :
      int stringIndex = ClsUtil.readU2(ptr);
      ptr.offset = getOffsetInConstantPool(stringIndex);
      return new StringConstantValue(ClsUtil.readUtf8Info(ptr));
    default : throw new ClsFormatException();
  }
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
public String getQualifiedName() throws ClsFormatException {
  if (myQualifiedName == null) {
    BytePointer ptr = new BytePointer(getData(), getConstantPoolEnd() + 2);
    ptr.offset = getOffsetInConstantPool(ClsUtil.readU2(ptr));
    int tag = ClsUtil.readU1(ptr);
    if (tag != ClsUtil.CONSTANT_Class){
      throw new ClsFormatException();
    }
    ptr.offset = getOffsetInConstantPool(ClsUtil.readU2(ptr));
    myQualifiedName = ClsUtil.readUtf8Info(ptr, '/', '.'); // keep '$' in the names
  }
  return myQualifiedName;
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private void parseConstantPool() throws ClsFormatException {
  if (myReferences != null) {
    return;
  }
  myReferences = new ArrayList<ReferenceInfo>();
  initConstantPool();
  final BytePointer ptr = new BytePointer(getData(), 0);
  ConstantPoolIterator iterator = new ConstantPoolIterator(ptr);
  while (iterator.hasMoreEntries()) {
    final int tag = ClsUtil.readU1(ptr);
    if (tag == ClsUtil.CONSTANT_Fieldref || tag == ClsUtil.CONSTANT_Methodref || tag == ClsUtil.CONSTANT_InterfaceMethodref) {
      //ptr.offset -= 1; // position to the beginning of the structure
      MemberReferenceInfo refInfo = readRefStructure(tag, ptr);
      if (refInfo != null) {
        myReferences.add(refInfo);
      }
      /*
      String name = mySymbolTable.getSymbol(refInfo.getMemberInfo().getName());
      if (name.indexOf('$') < 0 && name.indexOf('<') < 0) { // skip refs to synthetic members
        myReferences.add(refInfo);
      }
      else if ("<init>".equals(name)) { // add instance initializers (constructors)
        myReferences.add(refInfo);
      }
      else {
        System.out.println("ReferenceInfo thrown out: " + mySymbolTable.getSymbol(refInfo.getClassName()) + "." + mySymbolTable.getSymbol(refInfo.getMemberInfo().getName()));
        ourWasteReferenceObjectsCounter += 1;
      }
      */
    }
    else if (tag == ClsUtil.CONSTANT_Class) {
      ptr.offset -= 1; // position to the beginning of the structure
      String className = readClassInfo(ptr);
      myReferences.add(new ReferenceInfo(getSymbolId(className)));
    }
    iterator.next();
  }
  //System.out.println("ourWasteReferenceObjectsCounter = " + ourWasteReferenceObjectsCounter);
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private MemberReferenceInfo readRefStructure(int tag, BytePointer ptr) throws ClsFormatException {
  /*
  if (tag != ClsUtil.CONSTANT_Fieldref && tag != ClsUtil.CONSTANT_Methodref && tag != ClsUtil.CONSTANT_InterfaceMethodref) {
    throw new ClsFormatException();
  }
  */
  int classInfoIndex = ClsUtil.readU2(ptr);
  int nameTypeInfoIndex = ClsUtil.readU2(ptr);

  ptr.offset = getOffsetInConstantPool(classInfoIndex);
  if (ClsUtil.CONSTANT_Class != ClsUtil.readU1(ptr)) {
    throw new ClsFormatException();
  }
  ptr.offset = getOffsetInConstantPool(ClsUtil.readU2(ptr));
  String className = ClsUtil.readUtf8Info(ptr, '/', '.'); // keep '$' in names

  ptr.offset = getOffsetInConstantPool(nameTypeInfoIndex);
  if (ClsUtil.CONSTANT_NameAndType != ClsUtil.readU1(ptr)) {
    throw new ClsFormatException();
  }
  int memberNameIndex = ClsUtil.readU2(ptr);
  int descriptorIndex = ClsUtil.readU2(ptr);

  ptr.offset = getOffsetInConstantPool(memberNameIndex);
  String memberName = ClsUtil.readUtf8Info(ptr);

  if ((memberName.indexOf('$') >= 0 || memberName.indexOf('<') >= 0) && !CONSTRUCTOR_NAME.equals(memberName)) { // skip refs to synthetic members
    return null;
  }

  ptr.offset = getOffsetInConstantPool(descriptorIndex);
  String descriptor = ClsUtil.readUtf8Info(ptr);

  MemberInfo info = ClsUtil.CONSTANT_Fieldref == tag? new FieldInfo(getSymbolId(memberName), getSymbolId(descriptor)) : new MethodInfo(getSymbolId(memberName), getSymbolId(descriptor), CONSTRUCTOR_NAME.equals(memberName));
  return new MemberReferenceInfo(getSymbolId(className), info);
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private String readClassInfo(BytePointer ptr) throws ClsFormatException{
  final int tag = ClsUtil.readU1(ptr);
  if (tag != ClsUtil.CONSTANT_Class){
    throw new ClsFormatException(CompilerBundle.message("class.parsing.error.wrong.record.tag.expected.another", tag, ClsUtil.CONSTANT_Class));
  }
  int index = ClsUtil.readU2(ptr);
  return ClsUtil.readUtf8Info(new BytePointer(ptr.bytes, getOffsetInConstantPool(index)), '/', '.');
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private AnnotationConstantValue[][] readParameterAnnotations(BytePointer p) throws ClsFormatException {
  final BytePointer ptr = new BytePointer(p.bytes, p.offset + 6); // position to the number of parameters
  final int numberOfParams = ClsUtil.readU1(ptr);
  if (numberOfParams == 0) {
    return null;
  }
  final AnnotationConstantValue[][] annotations = new AnnotationConstantValue[numberOfParams][];
  for (int parameterIndex = 0; parameterIndex < numberOfParams; parameterIndex++) {
    annotations[parameterIndex] = readAnnotationsArray(ptr);
  }
  return annotations;
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
private String readAnnotationClassName(BytePointer ptr) throws ClsFormatException {
  // TODO: need this method because because of incomplete class format spec at the moment of writing
  // it is not clear what structure is expected: CONSTANT_Utf8 or CONSTANT_Class
  final int tag = ClsUtil.readU1(ptr);
  if (tag == ClsUtil.CONSTANT_Utf8) {
    return ClsUtil.getTypeText(ptr.bytes, ptr.offset + 2); //skip length
  }
  if (tag == ClsUtil.CONSTANT_Class){
    ptr.offset -= 1; // rollback
    return readClassInfo(ptr);
  }
  //noinspection HardCodedStringLiteral
  throw new ClsFormatException(CompilerBundle.message("class.parsing.error.wrong.record.tag.expected.another", tag, "CONSTANT_Utf8(" + ClsUtil.CONSTANT_Utf8 + ") / CONSTANT_Class(" + ClsUtil.CONSTANT_Class + ")"));
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
/**
 * Positions the pointer to the next entry
 */
public void next() throws ClsFormatException {
  myPtr.offset = myCurrentOffset;
  int tag = ClsUtil.readU1(myPtr);
  switch(tag){
    default:
      throw new ClsFormatException();

    case ClsUtil.CONSTANT_Class:
    case ClsUtil.CONSTANT_String:
      myPtr.offset += 2;
    break;

    case ClsUtil.CONSTANT_Fieldref:
    case ClsUtil.CONSTANT_Methodref:
    case ClsUtil.CONSTANT_InterfaceMethodref:
    case ClsUtil.CONSTANT_Integer:
    case ClsUtil.CONSTANT_Float:
    case ClsUtil.CONSTANT_NameAndType:
      myPtr.offset += 4;
    break;

    case ClsUtil.CONSTANT_Long:
    case ClsUtil.CONSTANT_Double:
      myPtr.offset += 8;
      myCurrentEntryIndex++; // takes 2 entries
    break;

    case ClsUtil.CONSTANT_Utf8:
      int length = ClsUtil.readU2(myPtr);
      myPtr.offset += length;
    break;

    case ClsUtil.CONSTANT_MethodHandle:
      myPtr.offset += 3;
      break;
    case ClsUtil.CONSTANT_MethodType:
      myPtr.offset += 2;
      break;
    case ClsUtil.CONSTANT_InvokeDynamic:
      myPtr.offset += 4;
      break;
  }
  myCurrentEntryIndex++;
  myCurrentOffset = myPtr.offset;
}
 

import com.intellij.util.cls.ClsUtil; //导入方法依赖的package包/类
/**
 * Positions the pointer to the next entry
 */
public void next() throws ClsFormatException {
  myPtr.offset = myCurrentOffset;
  int tag = ClsUtil.readU1(myPtr);
  switch(tag){
    default:
      throw new ClsFormatException();

    case ClsUtil.CONSTANT_Class:
    case ClsUtil.CONSTANT_String:
      myPtr.offset += 2;
      break;

    case ClsUtil.CONSTANT_Fieldref:
    case ClsUtil.CONSTANT_Methodref:
    case ClsUtil.CONSTANT_InterfaceMethodref:
    case ClsUtil.CONSTANT_Integer:
    case ClsUtil.CONSTANT_Float:
    case ClsUtil.CONSTANT_NameAndType:
      myPtr.offset += 4;
      break;

    case ClsUtil.CONSTANT_Long:
    case ClsUtil.CONSTANT_Double:
      myPtr.offset += 8;
      myCurrentEntryIndex++; // takes 2 entries
      break;

    case ClsUtil.CONSTANT_Utf8:
      int length = ClsUtil.readU2(myPtr);
      myPtr.offset += length;
      break;

    case ClsUtil.CONSTANT_MethodHandle:
      myPtr.offset += 3;
      break;
    case ClsUtil.CONSTANT_MethodType:
      myPtr.offset += 2;
      break;
    case ClsUtil.CONSTANT_InvokeDynamic:
      myPtr.offset += 4;
      break;
  }
  myCurrentEntryIndex++;
  myCurrentOffset = myPtr.offset;
}