dmaZero.c

src/_dmaFill16.c

@@ -1,4 +1,4 @@
 #include "global.h"
-void sub_0801D5EC(u32 a1, u32 a2, u32 a3) {
+void _DmaFill16(u32 a1, u32 a2, u32 a3) {
     DmaFill16(3, a1, a2, a3);
 }

src/_dmaZero.c

@@ -0,0 +1,24 @@
+#include "global.h"
+
+void _DmaFill32(u32, void*, u32);
+void _DmaFill16(u32, void*, u32);
+
+void _DmaZero(u8 *src, u32 count)
+{
+    u32 zero = 0;
+
+    switch (((u32)src | count) & 3) {
+        case 0:
+            _DmaFill32(0,src, count);
+            break;
+        case 2:
+            _DmaFill16(0, src, count);
+            break;
+        default:
+            do {
+                *src = zero;
+                src++;
+                count--;
+        } while (count != 0);
+    }
+}

src/code_08077DF4.c

@@ -63,7 +63,7 @@ void sub_08077E78(void* arg0, u32 bits)
   not = ~not;
   gLinkState.field_0xa &= not;
   gLinkState.keepFacing &= not;
-  sub_0801D630(arg0, 0x1c);
+  _DmaZero(arg0, 0x1c);
 }
 
 u32 sub_08077EC8(Unk_struct* arg0)

src/introSetTransition.c

@@ -13,7 +13,7 @@ typedef struct {
 } TransitionStruct;
 
 extern u32 DoFade(u32, u32);
-extern void sub_0801D630(u32*, u32, u32);
+extern void _DmaZero(u32*, u32, u32);
 extern u32 gUnk_02000080;
 extern TransitionStruct gUnk_03001000;
 extern Menu gUnk_02032EC0;
@@ -23,6 +23,6 @@ u32 IntroSetTransition(u8 transition, u32 param_2, u32 param_3)
 {
     gUnk_02032EC0.transitionType = transition;
     gUnk_03001000.functionIndex = 2;
-    sub_0801D630(&gUnk_02000080, 48, param_3);
+    _DmaZero(&gUnk_02000080, 48, param_3);
     return DoFade(7, 8);
 }

src/mainLoop.c

@@ -30,7 +30,7 @@ extern void sub_0804FFE4(void);
 extern void sub_0804FF84(u32);
 extern void sub_08056418(void);
 extern void sub_080ADD30(void);
-extern void sub_0801D630(void*, u32);
+extern void _DmaZero(void*, u32);
 extern void sub_08056010(u32);
 extern void ReadKeyInput();
 extern u32 sub_08055FF4();
@@ -68,7 +68,7 @@ void MainLoop(void) {
     sub_080ADD30();
     gRand = 0x1234567;
     s = &gUnk_03001000;
-    sub_0801D630(s, 16);
+    _DmaZero(s, 16);
     sub_08056010(0);
     while (1) {
         ReadKeyInput();

src/sub_08050008.c

@@ -2,12 +2,12 @@
 
 extern u32 gUnk_020354C0;
 extern s32 gUnk_03000FD0;
-extern void sub_0801D630(u32, u32, u32);
+extern void _DmaZero(u32, u32, u32);
 
 void sub_08050008(u32 param_1, u32 param_2, u32 param_3) {
     s32* unk;
 
-    sub_0801D630((u32)&gUnk_020354C0, 128, param_3);
+    _DmaZero((u32)&gUnk_020354C0, 128, param_3);
 
     unk = &gUnk_03000FD0;
     *(unk + 1) = -1;

src/textbox.c

@@ -3,7 +3,7 @@
 #include "entity.h"
 #include "textbox.h"
 
-void sub_0801D630();
+void _DmaZero();
 void ShowTextbox();
 void TextboxAtPosition();
 
@@ -62,7 +62,7 @@ void TextboxAtPosition(u32 index, u32 x, u32 y) {
 }
 
 void ShowTextbox(u32 index, u32 param_2, u32* dest) {
-    sub_0801D630(&gTextBox, 32, dest);
+    _DmaZero(&gTextBox, 32, dest);
     gTextBox.textIndex = index;
     gTextBox.textSpeed = 99;
     gTextBox.textWindowWidth = 26;
@@ -75,10 +75,10 @@ void ShowTextbox(u32 index, u32 param_2, u32* dest) {
 
 void sub_08056418(void) {
 
-    sub_0801D630(&gTextBox, 32);
-    sub_0801D630(&gUnk_02022780, 168);
-    sub_0801D630(&gUnk_02036A40, 8);
-    sub_0801D630(&gUnk_02036A38, 8);
-    sub_0801D630(&gUnk_02000040, 4);
+    _DmaZero(&gTextBox, 32);
+    _DmaZero(&gUnk_02022780, 168);
+    _DmaZero(&gUnk_02036A40, 8);
+    _DmaZero(&gUnk_02036A38, 8);
+    _DmaZero(&gUnk_02000040, 4);
     return;
 }