From 2023adf209156d9c461197eefac93b5216fbc2f3 Mon Sep 17 00:00:00 2001
From: Max <mparisi@stevens.edu>
Date: Wed, 25 Nov 2020 23:46:42 -0500
Subject: rename file to gUnkClass20.cpp, condense code, and add comments

---
 src/gUnkClass20.cpp | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 src/gUnkClass20.cpp

(limited to 'src/gUnkClass20.cpp')

diff --git a/src/gUnkClass20.cpp b/src/gUnkClass20.cpp
new file mode 100644
index 0000000..960e593
--- /dev/null
+++ b/src/gUnkClass20.cpp
@@ -0,0 +1,84 @@
+#include "ctorStruct.h"
+#include <string.h>
+#include <SDK/os.h>
+#include "GSfilterModule.h"
+#include "gUnkClass20.h"
+
+static ctorStruct gUnk8063F370(1, 4, 0);
+
+extern "C"
+{
+// TODO: move to proper header
+void* func_8023B058(u8);
+void func_8023B3B8(void*, u32);
+void func_8023B420(void*, u32);
+}
+
+// "constructor" ?
+gUnkClass20* gUnkClass20::func_801E0810(u32 p2, u8 p3, u8 p4)
+{
+    u32 r30;
+    
+    if (!lbl_8063F410)
+        return NULL;
+    gUnkClass20* r29 = func_801FB80C(lbl_8063F410);
+    if (!r29)
+        return NULL;
+    r29->unk1 = 1;
+    r29->unk2 = p3;
+    r29->unk3 = p4;
+    r29->unk4 = p2;
+    if (r29->unk3) {
+        r30 = lbl_8063F410->unk10;
+        void* r3 = func_8023B058(static_cast<u8>(r30 >> 16));
+        if (r3)
+            func_8023B3B8(r3, r30);
+    }
+    
+    const GSfilterModule* r3 = lbl_8063F410;
+    gUnkClass21* r4 = (r29->unk1) ? &r3->unk3F0[r29->unk0] : NULL;
+    
+    r4->unk0 = unk0;
+    r4->unk1 = unk1;
+    r4->unk2 = unk2;
+    r4->unk3 = unk3;
+    return r29;
+}
+
+// "destructor" ?
+void gUnkClass20::func_801E0904()
+{
+    if (unk1) {
+        if (unk3) {
+            u32 r31 = lbl_8063F410->unk10;
+            void* r3 = func_8023B058(static_cast<u8>(r31 >> 16));
+            if (r3)
+                func_8023B420(r3, r31);
+        }
+        unk1 = 0;
+        unk4 = NULL;
+    }
+}
+
+// read into p2
+void gUnkClass20::func_801E0978(gUnkClass21* p2) const
+{
+    if (unk1) {
+        const GSfilterModule* r5 = lbl_8063F410;
+        const gUnkClass21* r3 = (unk1) ? &r5->unk3F0[unk0] : NULL;
+        *p2 = *r3;
+        return;
+    }
+    memset(p2, 0, sizeof(gUnkClass21));
+}
+
+// write from p2
+void gUnkClass20::func_801E09DC(gUnkClass21* p2) const
+{
+    if (!unk1)
+        return;
+    const GSfilterModule* r5 = lbl_8063F410;
+    gUnkClass21* r3 = (unk1) ? &r5->unk3F0[unk0] : NULL;
+    *r3 = *p2;
+    DCFlushRange(r3, sizeof(gUnkClass21));
+}
-- 
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