/*
* JavaFieldReader
*/
public JavaField(JavaReader rdr)
{
Class = rdr.Class;
Flags = (JavaAccessFlags)rdr.Read16();
Name = rdr.ConstUtf8(rdr.Read16());
rdr.Where.Push($"field '{Name}'");
Type = new JavaType(rdr.ConstUtf8(rdr.Read16()), rdr.Where);
var attributes = new JavaAttributeSet(rdr);
if ((Flags & JavaAccessFlags.ACC_STATIC) != 0)
{
var constAttr = attributes.GetAttr <JavaAttribute.ConstantValue>();
if (constAttr != null)
{
InitConstant(constAttr.value, rdr.Where);
}
}
rdr.Where.Pop();
}
void WriteInnerClasses(JavaAttributeSet attributes)
{
if (OuterAndInnerClasses != null)
{
int n = 0;
for (int i = 0; i < OuterAndInnerClasses.Length; i++)
{
if (OuterAndInnerClasses[i] != null)
{
n++;
}
}
if (n != 0)
{
var innerClasses = new JavaClass.InnerClass[n];
n = 0;
for (int i = 0; i < OuterAndInnerClasses.Length; i++)
{
if (OuterAndInnerClasses[i] != null)
{
innerClasses[n++] = OuterAndInnerClasses[i];
}
}
attributes.Put(new JavaAttribute.InnerClasses(innerClasses));
}
}
}
/*
* JavaFieldWriter
*/
public void Write(JavaWriter wtr)
{
wtr.Where.Push($"field '{Name}'");
wtr.Write16((ushort)Flags);
wtr.Write16(wtr.ConstUtf8(Name));
wtr.Write16(wtr.ConstUtf8(Type.ToDescriptor()));
if (Constant != null)
{
var attributes = new JavaAttributeSet();
attributes.Put(new JavaAttribute.ConstantValue(Constant));
attributes.Write(wtr);
}
else
{
wtr.Write16(0); // attributes
}
wtr.Where.Pop();
}
public JavaMethod(JavaReader rdr, bool withCode = true)
{
Class = rdr.Class;
Flags = (JavaAccessFlags)rdr.Read16();
Name = rdr.ConstUtf8(rdr.Read16());
rdr.Where.Push($"method '{Name}'");
var tmpMethod = new JavaMethodRef(rdr.ConstUtf8(rdr.Read16()), rdr.Where);
ReturnType = tmpMethod.ReturnType;
Parameters = tmpMethod.Parameters;
var attributes = new JavaAttributeSet(rdr, withCode);
Exceptions = attributes.GetAttr <JavaAttribute.Exceptions>()?.classes;
var codeAttr = attributes.GetAttr <JavaAttribute.Code>();
if (withCode && codeAttr != null)
{
#if !DEBUG
try
{
#endif
Code = new JavaCode(rdr, this, codeAttr);
#if !DEBUG
}
catch (IndexOutOfRangeException)
{
throw rdr.Where.Exception("unexpected end of code");
}
#endif
}
InitParameterNames(attributes, codeAttr);
rdr.Where.Pop();
}
public void Write(JavaWriter wtr)
{
wtr.Where.Push($"method '{Name}'");
wtr.Write16((ushort)Flags);
wtr.Write16(wtr.ConstUtf8(Name));
wtr.Write16(wtr.ConstUtf8(ToDescriptor()));
var attributes = new JavaAttributeSet();
if (Code != null)
{
var codeAttr = new JavaAttribute.Code();
Code.Write(wtr, codeAttr);
attributes.Put(codeAttr);
}
attributes.Write(wtr);
wtr.Where.Pop();
}
public Code(JavaReader rdr)
{
rdr.Where.Push(tag);
(maxStack, maxLocals) = (rdr.Read16(), rdr.Read16());
var codeLength = ReadLength(rdr, "code");
code = rdr.ReadBlock(codeLength);
exceptions = new Exception[rdr.Read16()];
for (int i = 0; i < exceptions.Length; i++)
{
exceptions[i].start = rdr.Read16();
exceptions[i].endPlus1 = rdr.Read16();
exceptions[i].handler = rdr.Read16();
ushort catchType = rdr.Read16();
exceptions[i].catchType =
(catchType == 0 ? null : rdr.ConstClass(catchType).ClassName);
}
attributes = new JavaAttributeSet(rdr);
rdr.Where.Pop();
}
void ReadCallSites(JavaReader rdr, JavaAttributeSet attributes)
{
if (rdr.callSites != null)
{
var attr = attributes.GetAttr <JavaAttribute.BootstrapMethods>();
if (attr == null)
{
throw rdr.Where.Exception($"missing bootstrap methods attribute");
}
var methods = attr.methods;
foreach (var callSite in rdr.callSites)
{
int i = callSite.BootstrapMethodIndex;
if (i >= methods.Length)
{
throw rdr.Where.Exception($"invalid bootstrap method index");
}
callSite.BootstrapMethod = methods[i].mh;
callSite.BootstrapArgs = methods[i].args;
}
}
}
public void Write(JavaWriter wtr)
{
wtr.Where.Push($"writing class '{Name}'");
if (Name == null)
{
throw wtr.Where.Exception("missing class name");
}
wtr.Write16((ushort)Flags);
wtr.Write16(wtr.ConstClass(Name));
wtr.Write16(wtr.ConstClass(Super));
if (Interfaces == null)
{
wtr.Write16(0);
}
else
{
wtr.Write16(Interfaces.Count);
for (int i = 0; i < Interfaces.Count; i++)
{
wtr.Write16(wtr.ConstClass(Interfaces[i]));
}
}
if (Fields == null)
{
wtr.Write16(0);
}
else
{
wtr.Write16(Fields.Count);
for (int i = 0; i < Fields.Count; i++)
{
Fields[i].Write(wtr);
}
}
if (Methods == null)
{
wtr.Write16(0);
}
else
{
wtr.Write16(Methods.Count);
for (int i = 0; i < Methods.Count; i++)
{
Methods[i].Write(wtr);
}
}
var attributes = new JavaAttributeSet();
if (SourceFile != null)
{
attributes.Put(new JavaAttribute.SourceFile(SourceFile));
}
if (Signature != null)
{
attributes.Put(new JavaAttribute.Signature(Signature));
}
WriteInnerClasses(attributes);
if (wtr.bootstrapMethods != null)
{
attributes.Put(wtr.bootstrapMethods);
}
attributes.Write(wtr);
wtr.Where.Pop();
}
public Code()
{
attributes = new JavaAttributeSet();
}
public JavaClass(JavaReader rdr, int majorVersion, int minorVersion, bool withCode = true)
{
rdr.Class = this;
Flags = (JavaAccessFlags)rdr.Read16();
Name = rdr.ConstClass(rdr.Read16()).ClassName;
rdr.Where.Push($"reading class '{Name}' version {majorVersion}.{minorVersion}");
ushort superConstIndex = rdr.Read16();
if (!(superConstIndex == 0 && Name == "java.lang.Object"))
{
Super = rdr.ConstClass(superConstIndex).ClassName;
}
var interfaceCount = rdr.Read16();
if (interfaceCount != 0)
{
Interfaces = new List <string>(interfaceCount);
for (int i = 0; i < interfaceCount; i++)
{
Interfaces.Add(rdr.ConstClass(rdr.Read16()).ClassName);
}
}
var fieldCount = rdr.Read16();
if (fieldCount != 0)
{
Fields = new List <JavaField>(fieldCount);
for (int i = 0; i < fieldCount; i++)
{
Fields.Add(new JavaField(rdr));
}
}
var methodCount = rdr.Read16();
if (methodCount != 0)
{
Methods = new List <JavaMethod>(methodCount);
for (int i = 0; i < methodCount; i++)
{
Methods.Add(new JavaMethod(rdr, withCode));
}
}
var attributes = new JavaAttributeSet(rdr, withCode);
var sourceAttr = attributes.GetAttr <JavaAttribute.SourceFile>();
SourceFile = sourceAttr?.fileName;
var signatureAttr = attributes.GetAttr <JavaAttribute.Signature>();
Signature = signatureAttr?.descriptor;
var innerAttr = attributes.GetAttr <JavaAttribute.InnerClasses>();
if (innerAttr != null)
{
var enclosingClass =
attributes.GetAttr <JavaAttribute.EnclosingMethod>()
?.className;
ParseInnerClasses(innerAttr.classes, enclosingClass);
}
ReadCallSites(rdr, attributes);
if ((Flags & JavaAccessFlags.ACC_ENUM) != 0)
{
bool superOk = (Super == "java.lang.Enum");
if (IsInnerClass() && Super == OuterAndInnerClasses[0].OuterLongName)
{
superOk = true;
}
if (!superOk)
{
throw rdr.Where.Exception($"bad super class '{Super}' for enum");
}
}
rdr.Where.Pop();
}
void InitParameterNames(JavaAttributeSet attributes, JavaAttribute.Code codeAttr)
{
int numArgs = Parameters.Count;
var parmsAttr = attributes.GetAttr <JavaAttribute.MethodParameters>();
if (parmsAttr != null)
{
//
// MethodParameters attributes lists parameter names one by one
//
int numParms = parmsAttr.parms.Length;
if (numParms > numArgs)
{
numParms = numArgs;
}
for (int i = 0; i < numParms; i++)
{
Parameters[i].Name = parmsAttr.parms[i].name;
}
}
else if (codeAttr != null)
{
var localsAttrs =
codeAttr.attributes.GetAttrs <JavaAttribute.LocalVariableTable>();
if (localsAttrs != null)
{
//
// LocalVariableTables specify local variables by index,
// so we also need to keep track of the index of each parameter
//
int index = 0;
if ((Flags & JavaAccessFlags.ACC_STATIC) == 0)
{
index++;
}
for (int i = 0; i < numArgs; i++)
{
foreach (var localsAttr in localsAttrs)
{
for (int j = 0; j < localsAttr.vars.Length; j++)
{
if (localsAttr.vars[j].index == index)
{
Parameters[i].Name = localsAttr.vars[j].nameAndType.Name;
}
}
}
index += Parameters[i].Type.Category;
}
}
}
int i0 = ((Flags & JavaAccessFlags.ACC_STATIC) != 0) ? 0 : 1;
for (int i = 0; i < numArgs; i++)
{
if (Parameters[i].Name == null)
{
Parameters[i].Name = "$arg" + (i + i0);
}
}
}
