Make LZ4 Decompressor return a state value

include/PSX/Auxiliary/lz4_decompressor.hpp

@@ -6,10 +6,21 @@
 namespace JabyEngine {
     class LZ4Decompressor {
     public:
-        enum struct Result {
-            InProgress = 0,
-            Done,
-            Error
+        struct Result {
+            Progress progress;
+            size_t   bytes_ready;
+
+            static constexpr Result new_error() {
+                return {Progress::Error, 0};
+            }
+
+            static constexpr Result new_done(size_t bytes_ready) {
+                return {Progress::Done, bytes_ready};
+            }
+
+            static constexpr Result new_in_progress(size_t bytes_ready) {
+                return {Progress::InProgress, bytes_ready};
+            }
         };
 
     private:
@@ -28,7 +39,7 @@ namespace JabyEngine {
         void setup(uint8_t* dst_adr);
         void reset();
 
-        Progress process(const uint8_t* data, size_t size);
+        Result process(const uint8_t* data, size_t size);
     };
 }