1 files changed, 34 insertions, 0 deletions
diff --git a/src/portmod.rs b/src/portmod.rs
new file mode 100644
index 0000000..52c27ee
--- /dev/null
+++ b/src/portmod.rs
@@ -0,0 +1,34 @@
+pub enum Effect
+{
+    SetSpeed(u8),
+    PosJump(u8),
+    PattBreak(u8),
+    PattLoopStart,
+    PattLoop(u8),
+    PattDelay(u8),
+    SetTempo(u8),
+    TempoSlideDown(u8),
+    TempoSlideUp(u8),
+    NoEffect
+}
+
+impl Effect
+{
+    pub fn from_it_efx(f: (u8, u8)) -> Effect
+    {
+        let (efx, fxp) = f;
+        match (efx as char, fxp)
+        {
+            ('A', _) => Effect::SetSpeed(fxp),
+            ('B', _) => Effect::PosJump(fxp),
+            ('C', _) => Effect::PattBreak(fxp),
+            ('S', 0xb0) => Effect::PattLoopStart,
+            ('S', _) if fxp & 0xf0 == 0xb0 => Effect::PattLoop(fxp & 0x0f),
+            ('S', _) if fxp & 0xf0 == 0xe0 => Effect::PattDelay(fxp & 0x0f),
+            ('T', _) if fxp & 0xf0 == 0x00 => Effect::TempoSlideDown(fxp & 0x0f),
+            ('T', _) if fxp & 0xf0 == 0x10 => Effect::TempoSlideUp(fxp & 0x0f),
+            ('T', _) => Effect::SetTempo(fxp),
+            _ => Effect::NoEffect
+        }
+    }
+}