/// <summary>
/// Emit a native method
/// <summary>
public void emitNative()
{
// emit an empty method
this.code = null;
// emit code which calls the peer
PERWAPI.CILInstructions code = doEmit();
if (!emitter.stub)
{
if (isStatic)
{
string[] parTypes = new string[paramLen];
for (int i=0; i<paramLen; i++)
parTypes[i] = emit.nname(method.m_vars[i].type);
PERWAPI.Method peerMeth = emitter.findMethod(selfName + "Peer", name, parTypes, ret.nname());
pushArgs(code, false, paramLen);
code.MethInst(PERWAPI.MethodOp.call, peerMeth);
}
else
{
string[] parTypes = new string[paramLen+1];
parTypes[0] = selfName;
for (int i=0; i<paramLen; i++)
parTypes[i+1] = emit.nname(method.m_vars[i].type);
PERWAPI.Method peerMeth = emitter.findMethod(selfName + "Peer", name, parTypes, ret.nname());
peerMeth.AddCallConv(PERWAPI.CallConv.Instance);
code.Inst(PERWAPI.Op.ldarg_0);
code.FieldInst(PERWAPI.FieldOp.ldfld, emit.peerField);
pushArgs(code, true, paramLen);
code.MethInst(PERWAPI.MethodOp.call, peerMeth);
}
}
code.Inst(PERWAPI.Op.ret);
// emit default parameter wrappers
emitWrappers();
}
/// <summary>
/// Emit wrapper.
/// </summary>
private void emitWrapper(PERWAPI.MethodDef main, int paramLen)
{
// use explicit param count, and clear code
this.paramLen = paramLen;
this.code = null;
int numArgs = isStatic && !self ? paramLen : paramLen+1;
// TODO - this code probably isn't quite right, since it looks
// like we generate local variables even when they might not be
// used. Doesn't hurt anything, but is probably more efficient
// if we could determine that from the fcode.
// define our locals
int numLocals = method.m_paramCount - paramLen;
string[] localNames = new string[numLocals];
string[] localTypes = new string[numLocals];
for (int i=paramLen; i<method.m_paramCount; i++)
{
localNames[i-paramLen] = method.m_vars[i].name;
localTypes[i-paramLen] = emit.nname(method.m_vars[i].type);
}
// emit code
PERWAPI.CILInstructions code = doEmit(localNames, localTypes);
// push arguments passed thru
pushArgs(code, !(isStatic && !self), paramLen);
// emit default arguments
FCodeEmit.Reg[] regs = FCodeEmit.initRegs(emit.pod, isStatic, method.m_vars);
int maxLocals = method.maxLocals();
int maxStack = 16; // TODO - add additional default expr stack height
for (int i=paramLen; i<method.m_paramCount; i++)
{
FCodeEmit ce = new FCodeEmit(emit, method.m_vars[i].def, code, regs, emit.pod.typeRef(method.m_ret));
ce.paramCount = numArgs;
ce.vars = method.m_vars;
ce.isStatic = isStatic;
// TODO - is this correct?
ce.emit(false); // don't emit debug s cope for wrappers
maxStack = System.Math.Max(maxStack, 2+i+8);
}
// TODO
//code.maxLocals = maxLocals;
//code.maxStack = maxStack;
// call master implementation
if (isStatic)
code.MethInst(PERWAPI.MethodOp.call, main);
else
code.MethInst(PERWAPI.MethodOp.callvirt, main);
// return
code.Inst(PERWAPI.Op.ret);
}
/// <summary>
/// Emit a constructor - constructors get created as a static
/// factory methods, so that that CallNew can just push args
/// and invoke them
///
/// fan:
/// class Foo { new make(Long a) { ... } }
/// .net:
/// static Foo make(Long a) { return make_(new Foo(), a) }
/// static Foo make_(Foo self, Long a) { ... return self }
///
/// We call the first method "make" the "factory" and the
/// second method "make_" the "body". CallNew opcodes are
/// routed to the ctor factory, and CallCtor opcodes are routed
/// to the ctor body.
/// </summary>
public void emitCtor()
{
string ctorName = this.name;
// both factory and body are static from CLR's perspective
this.isStatic = true;
this.isHide = true;
// first emit the body with implicit self
this.name = ctorName + "_";
this.self = true;
doEmit();
PERWAPI.MethodDef make = emitter.methodDef;
// emit body default parameter wrappers
emitWrappers();
// then emit the factory
this.name = ctorName;
this.self = false;
this.ret = emit.pod.typeRef(emit.type.m_self);
this.code = null;
PERWAPI.CILInstructions code = doEmit();
PERWAPI.Method ctor = emitter.findMethod(selfName, ".ctor", new string[0], "System.Void");
code.MethInst(PERWAPI.MethodOp.newobj, ctor);
code.Inst(PERWAPI.Op.dup);
pushArgs(code, false, method.m_paramCount);
code.MethInst(PERWAPI.MethodOp.call, make);
code.Inst(PERWAPI.Op.ret);
// emit factory default parameter wrappers
emitWrappers();
}
