public ILEmitter Emit(ILEmitter il, Type arrayType, LocalBuilder array, LocalBuilder hash)
{
il.Ldc_I4(0) // start loop
.Stloc(typeof(int), out var index)
.EmitArrayLength(arrayType, array, out var count)
.DefineLabel(out var loopStart)
.DefineLabel(out var loopEnd);
using (il.LocalsScope()) {
il.MarkLabel(loopStart)
.Bne_Un_S(Ldloc(index), Ldloc(count), out var next)
.Br(loopEnd)
.MarkLabel(next);
}
using (il.LocalsScope()) {
var arrays = new Dictionary <ushort, LocalBuilder>(1)
{
[Arg.Input] = array
};
var itemVariable = new ArrayItemVariable(arrayType, _variable.OwnerType, arrays, index);
_resolver
.GetHasherEmitter(itemVariable)
.EmitHashing(il, hash)
.Add(Ldloc(index), Ldc_I4(1))
.Stloc(index)
.Br(loopStart);
}
return(il.MarkLabel(loopEnd).Ldloc(hash));
}
public ILEmitter EmitCompareArrays(
ILEmitter il,
Type arrayType,
Type ownerType,
LocalBuilder xArray,
LocalBuilder yArray,
Label afterLoop)
{
// todo: 2. compare array lengths at the beginning
il.EmitArrayLength(arrayType, xArray, out var countX)
.EmitArrayLength(arrayType, yArray, out var countY)
.Ldc_I4(0)
.Stloc(typeof(int), out var index)
.DefineLabel(out var loopStart)
.DefineLabel(out var continueLoop)
.MarkLabel(loopStart);
using (il.LocalsScope()) {
il.Ceq(Ldloc(index), Ldloc(countX), out var isDoneX)
.Ceq(Ldloc(index), Ldloc(countY), out var isDoneY);
_emitCheckIfLoopsAreDone(il, isDoneX, isDoneY, afterLoop);
}
using (il.LocalsScope()) {
var arrays = new Dictionary <ushort, LocalBuilder>(2)
{
[Arg.X] = xArray,
[Arg.Y] = yArray
};
var itemVariable = new ArrayItemVariable(arrayType, ownerType, arrays, index);
var itemComparison = _resolver.GetComparisonEmitter(itemVariable);
return(il.Emit(
itemComparison.Emit(continueLoop),
itemComparison.EmitCheckForResult(continueLoop))
.MarkLabel(continueLoop)
.Add(Ldloc(index), Ldc_I4(1))
.Stloc(index)
.Br(loopStart));
}
}
