MemorizedPositionWithLength SkipWithMemorizing(int activeBuffer, IILGen ilGenerator, Action <IILGen> pushReader, IFieldHandler handler, IILLocal tempPosition)
{
var memoPos = ilGenerator.DeclareLocal(typeof(IMemorizedPosition));
var memoLen = ilGenerator.DeclareLocal(typeof(int));
var position = new MemorizedPositionWithLength {
BufferIndex = activeBuffer, Pos = memoPos, Length = memoLen
};
MemorizeCurrentPosition(ilGenerator, pushReader, memoPos);
StoreCurrentPosition(ilGenerator, pushReader, tempPosition);
handler.Skip(ilGenerator, pushReader);
ilGenerator
.Do(pushReader) //[VR]
.Callvirt(() => default(ByteArrayReader).GetCurrentPosition()) //[posNew];
.Ldloc(tempPosition) //[posNew, posOld]
.Sub() //[readLen]
.ConvI4() //[readLen(i)]
.Stloc(memoLen); //[]
return(position);
}
void CopyFromMemorizedPosition(IILGen ilGenerator, Action <IILGen> pushReader, Action <IILGen> pushWriter, MemorizedPositionWithLength memo,
IILLocal memoPositionLoc)
{
MemorizeCurrentPosition(ilGenerator, pushReader, memoPositionLoc);
ilGenerator
.Do(pushWriter) //[W]
.Do(pushReader) //[W,VR]
.Ldloc(memo.Length) //[W, VR, readLen]
.Ldloc(memo.Pos) //[W, VR, readLen, Memorize]
.Callvirt(() => default(IMemorizedPosition).Restore()) //[W, VR]
.Call(() => default(ByteArrayReader).ReadByteArrayRaw(0)) //[W, byte[]]
.Call(() => default(AbstractBufferedWriter).WriteByteArrayRaw(null)) //[]
.Ldloc(memoPositionLoc) //[Memorize]
.Callvirt(() => default(IMemorizedPosition).Restore()); //[]
}
