/// <summary>
/// Emit a mixin router from a class to the mixin body methods.
/// </summary>
public void emitMixinRouter(Method m)
{
string parent = FanUtil.toDotnetTypeName(m.parent());
string name = FanUtil.toDotnetMethodName(m.name());
string ret = FanUtil.toDotnetTypeName(m.inheritedReturns());
string[] parTypes = new string[] { parent };
List pars = m.@params();
int paramCount = pars.sz();
// find first param with default value
int firstDefault = paramCount;
for (int i = 0; i < paramCount; i++)
{
if (((Param)pars.get(i)).hasDefault())
{
firstDefault = i; break;
}
}
// generate routers
for (int i = firstDefault; i <= paramCount; i++)
{
string[] myParams = new string[i];
string[] myParamNames = new string[i];
string[] implParams = new string[i + 1];
implParams[0] = parent;
for (int j = 0; j < i; j++)
{
Param param = (Param)m.@params().get(j);
Type pt = param.type();
string s = FanUtil.toDotnetTypeName(pt);
myParams[j] = s;
myParamNames[j] = param.name();
implParams[j + 1] = s;
}
// CLR requires public virtual
PERWAPI.MethAttr attr = PERWAPI.MethAttr.Public | PERWAPI.MethAttr.Virtual;
PERWAPI.CILInstructions code = emitter.emitMethod(name, ret, myParamNames, myParams,
attr, new string[0], new string[0]);
code.Inst(PERWAPI.Op.ldarg_0); // push this
for (int p = 0; p < i; p++)
{
// push args
Param param = (Param)m.@params().get(p);
FCodeEmit.loadVar(code, FanUtil.toDotnetStackType(param.type()), p + 1);
}
PERWAPI.Method meth = emitter.findMethod(parent + "_", name, implParams, ret);
code.MethInst(PERWAPI.MethodOp.call, meth);
code.Inst(PERWAPI.Op.ret);
}
}
//////////////////////////////////////////////////////////////////////////
// Code Utils
//////////////////////////////////////////////////////////////////////////
/// <summary>
/// Push the specified number of arguments onto the stack.
/// </summary>
private void pushArgs(PERWAPI.CILInstructions code, bool self, int count)
{
if (self)
{
code.Inst(PERWAPI.Op.ldarg_0);
}
for (int i = 0; i < count; i++)
{
FTypeRef var = emit.pod.typeRef(method.m_vars[i].type);
FCodeEmit.loadVar(code, var.stackType, self ? i + 1 : i);
}
}
/// <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 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);
}