More work on AnimQueueDecoder

Source/Integration/AnimQueue.h

@@ -0,0 +1,121 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "StringDecoder.h"
+
+////////////////////////////////////////////////
+//
+// This is copied over from Luprex source.  Not ideal.
+//
+////////////////////////////////////////////////
+
+enum EAnimValueType {
+	T_STRING,
+	T_NUMBER,
+	T_BOOLEAN,
+	T_XYZ,
+	T_UNINITIALIZED
+};
+
+////////////////////////////////////////////////
+//
+// An single animation step.
+// 
+// The body consists of a sequence of FAnimField
+// records.  The body is encoded, to read the
+// FAnimField records you need an FAnimStepDecoder.
+//
+////////////////////////////////////////////////
+
+struct FAnimStep {
+	uint32 Hash;
+	std::string_view Body;
+};
+
+////////////////////////////////////////////////
+//
+// A single animation field.
+// 
+// A field consists of a variable name,
+// a persistent flag, a type, and some fields
+// to hold the values.
+//
+// If the value is boolean, it is stored in
+// X, as either 1 or 0.   If the value is double,
+// it is stored in X.
+// 
+////////////////////////////////////////////////
+
+struct FAnimField {
+	std::string_view Name;
+	bool Persistent;
+	EAnimValueType Type;
+	double X, Y, Z;
+	std::string_view S;
+};
+
+////////////////////////////////////////////////
+//
+// An Animation Queue Decoder.
+//
+// This acts a lot like a stream reader,
+// it reads one AnimEntry at a time from
+// the animation queue until you reach
+// 'end-of-file'.
+//
+////////////////////////////////////////////////
+
+class FAnimQueueDecoder {
+private:
+	FStringDecoder Decoder;
+
+public:
+	// Initialize the FAnimQueueDecoder with the encoded animation queue.
+	//
+	FAnimQueueDecoder(std::string_view s) : Decoder(s) {}
+
+	// Return true if the parser has reached the end of the string.
+	//
+	bool AtEOF() { return Decoder.at_eof(); }
+
+	// Read one animation step.
+	// 
+	FAnimStep ReadStep();
+
+	// Convert an AnimQueue to an FString.
+	//
+	static FString DebugString(std::string_view s);
+};
+
+////////////////////////////////////////////////
+//
+// An Animation Step Decoder.
+//
+// This acts a lot like a stream reader,
+// it reads one FAnimField at a time from
+// the animation queue until you reach
+// 'end-of-file'.
+//
+////////////////////////////////////////////////
+
+class FAnimStepDecoder {
+private:
+	FStringDecoder Decoder;
+
+public:
+	// Initialize the FAnimStepDecoder from the FAnimStep.
+	// 
+	FAnimStepDecoder(const FAnimStep &step) : Decoder(step.Body) {}
+
+	// Return true if the parser has reached the end of the string.
+	//
+	bool AtEOF() { return Decoder.at_eof(); }
+
+	// Read one field.
+	// 
+	FAnimField ReadField();
+
+	// Convert an AnimStep to an FString.
+	//
+	static FString DebugString(const FAnimStep &step);
+};