From 3436961bb5c01d659d09be134368f4f69460cef9 Mon Sep 17 00:00:00 2001 From: MW Date: Sat, 26 May 2007 13:40:19 +0000 Subject: Start of rewrite 5279! --- .../OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs | 476 +++++++++++++++++++++ 1 file changed, 476 insertions(+) create mode 100644 OpenSim/OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs (limited to 'OpenSim/OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs') diff --git a/OpenSim/OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs b/OpenSim/OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs new file mode 100644 index 0000000..f2f0da5 --- /dev/null +++ b/OpenSim/OpenSim.Scripting/EmbeddedJVM/ClassRecord.cs @@ -0,0 +1,476 @@ +using System; +using System.IO; +using System.Collections.Generic; +using System.Text; +using OpenSim.Scripting.EmbeddedJVM.Types; + +namespace OpenSim.Scripting.EmbeddedJVM +{ + public class ClassRecord + { + private ushort _majorVersion; + private ushort _minorVersion; + private ushort _constantPoolCount; + private ushort _accessFlags; + private ushort _thisClass; + private ushort _supperClass; + private ushort _interfaceCount; + private ushort _fieldCount; + private ushort _methodCount; + //private ushort _attributeCount; + //private string _name; + public Dictionary StaticFields = new Dictionary(); + public PoolClass mClass; + + public List _constantsPool = new List(); + private List _methodsList = new List(); + private List _fieldList = new List(); + + public ClassRecord() + { + + } + + public ClassInstance CreateNewInstance() + { + return new ClassInstance(); + } + + public void LoadClassFromFile(string fileName) + { + Console.WriteLine("loading script " + fileName); + FileStream fs = File.OpenRead(fileName); + this.LoadClassFromBytes(ReadFully(fs)); + fs.Close(); + } + + public void LoadClassFromBytes(byte[] data) + { + int i = 0; + i += 4; + _minorVersion = (ushort)((data[i++] << 8) + data[i++] ); + _majorVersion = (ushort)((data[i++] << 8) + data[i++] ); + _constantPoolCount = (ushort)((data[i++] << 8) + data[i++] ); + // Console.WriteLine("there should be " + _constantPoolCount + " items in the pool"); + for (int count = 0; count < _constantPoolCount -1 ; count++) + { + //read in the constant pool + byte pooltype = data[i++]; + //Console.WriteLine("#" +count +": new constant type = " +pooltype); + //Console.WriteLine("start position is: " + i); + switch (pooltype) + { + case 1: //Utf8 + ushort uLength = (ushort)((data[i++] << 8) + data[i++] ); + + // Console.WriteLine("new utf8 type, length is " + uLength); + PoolUtf8 utf8 = new PoolUtf8(); + utf8.readValue(data, ref i, uLength); + this._constantsPool.Add(utf8); + break; + case 3: //Int + break; + case 7: //Class + PoolClass pClass = new PoolClass(this); + pClass.readValue(data, ref i); + this._constantsPool.Add(pClass); + break; + case 10: //Method + PoolMethodRef pMeth = new PoolMethodRef(this); + pMeth.readValue(data, ref i); + this._constantsPool.Add(pMeth); + break; + case 12: //NamedType + PoolNamedType pNamed = new PoolNamedType(this); + pNamed.readValue(data, ref i); + this._constantsPool.Add(pNamed); + break; + } + } + + _accessFlags = (ushort)((data[i++] << 8) + data[i++] ); + _thisClass = (ushort)((data[i++] << 8) + data[i++] ); + _supperClass = (ushort)((data[i++] << 8) + data[i++] ); + + if (this._constantsPool[this._thisClass - 1] is PoolClass) + { + this.mClass = ((PoolClass)this._constantsPool[this._thisClass - 1]); + } + + _interfaceCount = (ushort)((data[i++] << 8) + data[i++]); + //should now read in the info for each interface + _fieldCount = (ushort)((data[i++] << 8) + data[i++]); + //should now read in the info for each field + _methodCount = (ushort)((data[i++] << 8) + data[i++]); + for (int count = 0; count < _methodCount; count++) + { + MethodInfo methInf = new MethodInfo(this); + methInf.ReadData(data, ref i); + this._methodsList.Add(methInf); + } + } + + public void AddMethodsToMemory(MethodMemory memory) + { + for (int count = 0; count < _methodCount; count++) + { + this._methodsList[count].AddMethodCode(memory); + } + } + + public bool StartMethod(Thread thread, string methodName) + { + for (int count = 0; count < _methodCount; count++) + { + if (this._constantsPool[this._methodsList[count].NameIndex-1] is PoolUtf8) + { + if (((PoolUtf8)this._constantsPool[this._methodsList[count].NameIndex-1]).Value == methodName) + { + //Console.WriteLine("found method: " + ((PoolUtf8)this._constantsPool[this._methodsList[count].NameIndex - 1]).Value); + thread.SetPC(this._methodsList[count].CodePointer); + return true; + } + } + } + return false; + } + + public void PrintToConsole() + { + Console.WriteLine("Class File:"); + Console.WriteLine("Major version: " + _majorVersion); + Console.WriteLine("Minor version: " + _minorVersion); + Console.WriteLine("Pool size: " + _constantPoolCount); + + for (int i = 0; i < _constantsPool.Count; i++) + { + this._constantsPool[i].Print(); + } + + Console.WriteLine("Access flags: " + _accessFlags); + Console.WriteLine("This class: " + _thisClass ); + Console.WriteLine("Super class: " + _supperClass); + + for (int count = 0; count < _methodCount; count++) + { + Console.WriteLine(); + this._methodsList[count].Print(); + } + + Console.WriteLine("class name is " + this.mClass.Name.Value); + } + + public static byte[] ReadFully(Stream stream) + { + byte[] buffer = new byte[1024]; + using (MemoryStream ms = new MemoryStream()) + { + while (true) + { + int read = stream.Read(buffer, 0, buffer.Length); + if (read <= 0) + return ms.ToArray(); + ms.Write(buffer, 0, read); + } + } + } + + #region nested classes + public class PoolItem + { + public virtual void Print() + { + + } + } + + public class PoolUtf8 : PoolItem + { + public string Value = ""; + + public void readValue(byte[] data,ref int pointer , int length) + { + for (int i = 0; i < length; i++) + { + int a =(int) data[pointer++]; + if ((a & 0x80) == 0) + { + Value = Value + (char)a; + } + else if ((a & 0x20) == 0) + { + int b = (int) data[pointer++]; + Value = Value + (char)(((a & 0x1f) << 6) + (b & 0x3f)); + } + else + { + int b = (int)data[pointer++]; + int c = (int)data[pointer++]; + Value = Value + (char)(((a & 0xf) << 12) + ((b & 0x3f) << 6) + (c & 0x3f)); + } + } + } + + public override void Print() + { + Console.WriteLine("Utf8 type: " + Value); + } + } + + private class PoolInt : PoolItem + { + + } + + public class PoolClass : PoolItem + { + //public string name = ""; + public ushort namePointer = 0; + private ClassRecord parent; + public PoolUtf8 Name; + + public PoolClass(ClassRecord paren) + { + parent = paren; + } + + public void readValue(byte[] data, ref int pointer) + { + namePointer = (ushort)((data[pointer++] << 8) + data[pointer++] ); + } + + public override void Print() + { + this.Name = ((PoolUtf8)this.parent._constantsPool[namePointer - 1]); + Console.Write("Class type: " + namePointer); + Console.WriteLine(" // " + ((PoolUtf8)this.parent._constantsPool[namePointer - 1]).Value); + + } + } + + public class PoolMethodRef : PoolItem + { + public ushort classPointer = 0; + public ushort nameTypePointer = 0; + public PoolNamedType mNameType; + public PoolClass mClass; + private ClassRecord parent; + + public PoolMethodRef(ClassRecord paren) + { + parent = paren; + } + + public void readValue(byte[] data, ref int pointer) + { + classPointer = (ushort)((data[pointer++] << 8) + data[pointer++]); + nameTypePointer = (ushort)((data[pointer++] << 8) + data[pointer++]); + } + + public override void Print() + { + this.mNameType = ((PoolNamedType)this.parent._constantsPool[nameTypePointer - 1]); + this.mClass = ((PoolClass)this.parent._constantsPool[classPointer - 1]); + Console.WriteLine("MethodRef type: " + classPointer + " , " + nameTypePointer); + } + } + + public class PoolNamedType : PoolItem + { + public ushort namePointer = 0; + public ushort typePointer = 0; + private ClassRecord parent; + public PoolUtf8 Name; + public PoolUtf8 Type; + + public PoolNamedType(ClassRecord paren) + { + parent = paren; + } + + public void readValue(byte[] data, ref int pointer) + { + namePointer = (ushort)((data[pointer++] << 8) + data[pointer++] ); + typePointer = (ushort)((data[pointer++] << 8) + data[pointer++] ); + } + + public override void Print() + { + Name = ((PoolUtf8)this.parent._constantsPool[namePointer-1]); + Type = ((PoolUtf8)this.parent._constantsPool[typePointer-1]); + Console.Write("Named type: " + namePointer + " , " + typePointer ); + Console.WriteLine(" // "+ ((PoolUtf8)this.parent._constantsPool[namePointer-1]).Value); + } + } + + //*********************** + public class MethodInfo + { + public ushort AccessFlags = 0; + public ushort NameIndex = 0; + public string Name = ""; + public ushort DescriptorIndex = 0; + public ushort AttributeCount = 0; + public List Attributes = new List(); + private ClassRecord parent; + public int CodePointer = 0; + + public MethodInfo(ClassRecord paren) + { + parent = paren; + } + + public void AddMethodCode(MethodMemory memory) + { + Array.Copy(this.Attributes[0].Code, 0, memory.MethodBuffer, memory.NextMethodPC, this.Attributes[0].Code.Length); + memory.Methodcount++; + this.CodePointer = memory.NextMethodPC; + memory.NextMethodPC += this.Attributes[0].Code.Length; + } + + public void ReadData(byte[] data, ref int pointer) + { + AccessFlags = (ushort)((data[pointer++] << 8) + data[pointer++]); + NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]); + DescriptorIndex = (ushort)((data[pointer++] << 8) + data[pointer++]); + AttributeCount = (ushort)((data[pointer++] << 8) + data[pointer++]); + for(int i =0; i< AttributeCount; i++) + { + MethodAttribute attri = new MethodAttribute(this.parent); + attri.ReadData(data, ref pointer); + this.Attributes.Add(attri); + } + } + + public void Print() + { + Console.WriteLine("Method Info Struct: "); + Console.WriteLine("AccessFlags: " + AccessFlags); + Console.WriteLine("NameIndex: " + NameIndex +" // "+ ((PoolUtf8)this.parent._constantsPool[NameIndex-1]).Value); + Console.WriteLine("DescriptorIndex: " + DescriptorIndex + " // "+ ((PoolUtf8)this.parent._constantsPool[DescriptorIndex-1]).Value); + Console.WriteLine("Attribute Count:" + AttributeCount); + for (int i = 0; i < AttributeCount; i++) + { + this.Attributes[i].Print(); + } + } + + public class MethodAttribute + { + public ushort NameIndex = 0; + public string Name = ""; + public Int32 Length = 0; + //for now only support code attribute + public ushort MaxStack = 0; + public ushort MaxLocals = 0; + public Int32 CodeLength = 0; + public byte[] Code; + public ushort ExceptionTableLength = 0; + public ushort SubAttributeCount = 0; + public List SubAttributes = new List(); + private ClassRecord parent; + + public MethodAttribute(ClassRecord paren) + { + parent = paren; + } + + public void ReadData(byte[] data, ref int pointer) + { + NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]); + Length = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]); + MaxStack = (ushort)((data[pointer++] << 8) + data[pointer++]); + MaxLocals = (ushort)((data[pointer++] << 8) + data[pointer++]); + CodeLength = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]); + Code = new byte[CodeLength]; + for (int i = 0; i < CodeLength; i++) + { + Code[i] = data[pointer++]; + } + ExceptionTableLength = (ushort)((data[pointer++] << 8) + data[pointer++]); + SubAttributeCount = (ushort)((data[pointer++] << 8) + data[pointer++]); + for (int i = 0; i < SubAttributeCount; i++) + { + SubAttribute subAttri = new SubAttribute(this.parent); + subAttri.ReadData(data, ref pointer); + this.SubAttributes.Add(subAttri); + } + } + + public void Print() + { + Console.WriteLine("Method Attribute: "); + Console.WriteLine("Name Index: " + NameIndex + " // "+ ((PoolUtf8)this.parent._constantsPool[NameIndex-1]).Value); + Console.WriteLine("Length: " + Length); + Console.WriteLine("MaxStack: " + MaxStack); + Console.WriteLine("MaxLocals: " + MaxLocals); + Console.WriteLine("CodeLength: " + CodeLength); + for (int i = 0; i < Code.Length; i++) + { + Console.WriteLine("OpCode #" + i + " is: " + Code[i]); + } + Console.WriteLine("SubAttributes: " + SubAttributeCount); + for (int i = 0; i < SubAttributeCount; i++) + { + this.SubAttributes[i].Print(); + } + } + + public class SubAttribute + { + public ushort NameIndex = 0; + public string Name = ""; + public Int32 Length = 0; + public byte[] Data; + private ClassRecord parent; + + public SubAttribute(ClassRecord paren) + { + parent = paren; + } + + public void ReadData(byte[] data, ref int pointer) + { + NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]); + Length = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]); + Data = new byte[Length]; + for (int i = 0; i < Length; i++) + { + Data[i] = data[pointer++]; + } + } + + public void Print() + { + Console.WriteLine("SubAttribute: NameIndex: " + NameIndex + " // " + ((PoolUtf8)this.parent._constantsPool[NameIndex - 1]).Value); + } + + } + } + + } + private class InterfaceInfo + { + public void ReadData(byte[] data, ref int i) + { + + } + } + private class FieldInfo + { + public void ReadData(byte[] data, ref int i) + { + + } + } + private class AttributeInfo + { + public void ReadData(byte[] data, ref int i) + { + + } + } + #endregion + + } +} -- cgit v1.1