Adding modding folder with a hacked build.

modding/hacked/ss1/serial/PositioningDecoder.go

@@ -0,0 +1,27 @@
+package serial
+
+import "io"
+
+// PositioningDecoder is a Decoder with positioning capabilities.
+type PositioningDecoder struct {
+	Decoder
+
+	seeker io.Seeker
+}
+
+// NewPositioningDecoder creates a new PositioningDecoder from given reader.
+func NewPositioningDecoder(source io.ReadSeeker) *PositioningDecoder {
+	return &PositioningDecoder{Decoder: Decoder{source: source, offset: 0}, seeker: source}
+}
+
+// SetCurPos changes the encoding position to the specified absolute offset.
+func (coder *PositioningDecoder) SetCurPos(offset uint32) {
+	if coder.firstError != nil {
+		return
+	}
+	_, coder.firstError = coder.seeker.Seek(int64(offset), io.SeekStart)
+	if coder.firstError != nil {
+		return
+	}
+	coder.offset = offset
+}