/// <summary>
/// Read the header
/// </summary>
internal void ReadHeader(ClassFile cf)
{
var magic = stream.ReadU4();
if (magic != ClassFile.Magic)
throw new Dot42Exception("Invalid magic");
cf.MinorVersion = stream.ReadU2();
cf.MajorVersion = stream.ReadU2();
var cpCount = stream.ReadU2();
var cp = new ConstantPool(cpCount, cf.Loader);
for (var i = 1; i < cpCount; i++)
{
var tag = (ConstantPoolTags) stream.ReadU1();
ConstantPoolEntry entry;
int tmp;
switch (tag)
{
case ConstantPoolTags.Class:
entry = new ConstantPoolClass(cp, stream.ReadU2());
break;
case ConstantPoolTags.Fieldref:
tmp = stream.ReadU2();
entry = new ConstantPoolFieldRef(cp, tmp, stream.ReadU2());
break;
case ConstantPoolTags.Methodref:
tmp = stream.ReadU2();
entry = new ConstantPoolMethodRef(cp, tmp, stream.ReadU2());
break;
case ConstantPoolTags.InterfaceMethodref:
tmp = stream.ReadU2();
entry = new ConstantPoolInterfaceMethodRef(cp, tmp, stream.ReadU2());
break;
case ConstantPoolTags.String:
entry = new ConstantPoolString(cp, stream.ReadU2());
break;
case ConstantPoolTags.Integer:
entry = new ConstantPoolInteger(cp, stream.ReadS4());
break;
case ConstantPoolTags.Float:
entry = new ConstantPoolFloat(cp, stream.ReadF4());
break;
case ConstantPoolTags.Long:
entry = new ConstantPoolLong(cp, stream.ReadS8());
break;
case ConstantPoolTags.Double:
entry = new ConstantPoolDouble(cp, stream.ReadF8());
break;
case ConstantPoolTags.NameAndType:
tmp = stream.ReadU2();
entry = new ConstantPoolNameAndType(cp, tmp, stream.ReadU2());
break;
case ConstantPoolTags.Utf8:
tmp = stream.ReadU2();
entry = new ConstantPoolUtf8(cp, stream.ReadUTF8(tmp));
break;
default:
throw new Dot42Exception("Unknown constant pool tag: " + (int)tag);
}
cp[i] = entry;
if ((tag == ConstantPoolTags.Double) || (tag == ConstantPoolTags.Long))
i++;
}
cf.ClassAccessFlags = (ClassAccessFlags) stream.ReadU2();
var index = stream.ReadU2();
cf.ClassName = cp.GetEntry<ConstantPoolClass>(index).Name;
index = stream.ReadU2();
cf.SuperClass = (index == 0) ? null : new ObjectTypeReference(cp.GetEntry<ConstantPoolClass>(index).Name, null);
// Interfaces
var icount = stream.ReadU2();
var interfaces = new string[icount];
for (var i = 0; i < icount; i++)
{
index = stream.ReadU2();
interfaces[i] = cp.GetEntry<ConstantPoolClass>(index).Name;
}
cf.Interfaces = interfaces.Select(x => new ObjectTypeReference(x, null)).ToArray();
// Fields
var fcount = stream.ReadU2();
for (var i = 0; i < fcount; i++)
{
var accessFlags = (FieldAccessFlags) stream.ReadU2();
var nameIndex = stream.ReadU2();
var descriptorIndex = stream.ReadU2();
var name = cp.GetEntry<ConstantPoolUtf8>(nameIndex).Value;
var descriptor = cp.GetEntry<ConstantPoolUtf8>(descriptorIndex).Value;
var field = new FieldDefinition(cf, accessFlags, name, descriptor, null);
ReadAttributes(cp, field);
cf.Fields.Add(field);
}
// Methods
var mcount = stream.ReadU2();
for (var i = 0; i < mcount; i++)
{
var accessFlags = (MethodAccessFlags)stream.ReadU2();
var nameIndex = stream.ReadU2();
var descriptorIndex = stream.ReadU2();
var name = cp.GetEntry<ConstantPoolUtf8>(nameIndex).Value;
var descriptor = cp.GetEntry<ConstantPoolUtf8>(descriptorIndex).Value;
var method = new MethodDefinition(cf, accessFlags, name, descriptor, null);
ReadAttributes(cp, method);
cf.Methods.Add(method);
}
// Attributes
ReadAttributes(cp, cf);
}
/// <summary>
/// Make a .NET method reference from a java constant pool method reference.
/// </summary>
private XMethodReference AsMethodReference(ConstantPoolMethodRef cpMethod, bool hasThis)
{
return XBuilder.AsMethodReference(module, cpMethod, hasThis);
}
/// <summary>
/// Convert an Java method reference to an XMethodReference.
/// </summary>
public static XMethodReference AsMethodReference(XModule module, ConstantPoolMethodRef method, bool hasThis)
{
return AsMethodReference(module, method.Name, method.Descriptor, method.DeclaringType, method.ClassName, hasThis);
}
