From e2244831a77723a1a565b8df24dda3ade00f584f Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 1 Dec 2017 21:51:06 -0500
Subject: [PATCH] through sub_800DB18

---
 asm/link_rfu.s     | 160 ---------------------------------------------
 include/link_rfu.h |  10 ++-
 src/link_rfu.c     |  69 +++++++++++++++++++
 3 files changed, 78 insertions(+), 161 deletions(-)

diff --git a/asm/link_rfu.s b/asm/link_rfu.s
index f8d6eddcd8..3667d39bc3 100644
--- a/asm/link_rfu.s
+++ b/asm/link_rfu.s
@@ -7,166 +7,6 @@
 
 @ file boundary?
 
-	thumb_func_start sub_800DA68
-sub_800DA68: @ 800DA68
-	push {r4,lr}
-	adds r2, r0, 0
-	adds r4, r1, 0
-	ldrb r0, [r4, 0x1]
-	cmp r0, 0
-	bne _0800DA7E
-	adds r0, r2, 0
-	movs r1, 0
-	bl sub_800DAC8
-	b _0800DAC0
-_0800DA7E:
-	movs r3, 0
-_0800DA80:
-	ldrb r1, [r2, 0x1C]
-	lsls r0, r1, 3
-	subs r0, r1
-	lsls r0, 1
-	adds r0, r3, r0
-	adds r0, r2, r0
-	adds r1, r4, r3
-	ldrb r1, [r1]
-	strb r1, [r0]
-	adds r3, 0x1
-	cmp r3, 0xD
-	ble _0800DA80
-	ldrb r0, [r2, 0x1C]
-	adds r0, 0x1
-	ldrb r1, [r2, 0x1C]
-	strb r0, [r2, 0x1C]
-	ldrb r1, [r2, 0x1C]
-	movs r0, 0x1
-	ands r0, r1
-	ldrb r1, [r2, 0x1C]
-	strb r0, [r2, 0x1C]
-	ldrb r0, [r2, 0x1E]
-	cmp r0, 0x1
-	bhi _0800DABA
-	ldrb r0, [r2, 0x1E]
-	adds r0, 0x1
-	ldrb r1, [r2, 0x1E]
-	strb r0, [r2, 0x1E]
-	b _0800DAC0
-_0800DABA:
-	ldrb r0, [r2, 0x1C]
-	ldrb r1, [r2, 0x1D]
-	strb r0, [r2, 0x1D]
-_0800DAC0:
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_800DA68
-
-	thumb_func_start sub_800DAC8
-sub_800DAC8: @ 800DAC8
-	push {r4,r5,lr}
-	adds r3, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r3, 0x1E]
-	cmp r0, 0
-	bne _0800DAD8
-	movs r0, 0
-	b _0800DB12
-_0800DAD8:
-	cmp r5, 0
-	beq _0800DAF6
-	movs r4, 0
-_0800DADE:
-	adds r2, r5, r4
-	ldrb r1, [r3, 0x1D]
-	lsls r0, r1, 3
-	subs r0, r1
-	lsls r0, 1
-	adds r0, r4, r0
-	adds r0, r3, r0
-	ldrb r0, [r0]
-	strb r0, [r2]
-	adds r4, 0x1
-	cmp r4, 0xD
-	ble _0800DADE
-_0800DAF6:
-	ldrb r0, [r3, 0x1D]
-	adds r0, 0x1
-	ldrb r1, [r3, 0x1D]
-	strb r0, [r3, 0x1D]
-	ldrb r1, [r3, 0x1D]
-	movs r0, 0x1
-	ands r0, r1
-	ldrb r1, [r3, 0x1D]
-	strb r0, [r3, 0x1D]
-	ldrb r0, [r3, 0x1E]
-	subs r0, 0x1
-	ldrb r1, [r3, 0x1E]
-	strb r0, [r3, 0x1E]
-	movs r0, 0x1
-_0800DB12:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_800DAC8
-
-	thumb_func_start sub_800DB18
-sub_800DB18: @ 800DB18
-	push {r4,r5,lr}
-	adds r3, r0, 0
-	adds r5, r1, 0
-	ldr r1, =0x00000202
-	adds r0, r3, r1
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bhi _0800DB70
-	movs r2, 0
-	movs r0, 0x80
-	lsls r0, 2
-	adds r4, r3, r0
-_0800DB30:
-	ldrb r0, [r4]
-	lsls r0, 8
-	adds r0, r2, r0
-	adds r0, r3, r0
-	adds r1, r5, r2
-	ldrb r1, [r1]
-	strb r1, [r0]
-	adds r2, 0x1
-	cmp r2, 0xFF
-	ble _0800DB30
-	movs r0, 0x80
-	lsls r0, 2
-	adds r1, r3, r0
-	ldrb r0, [r1]
-	adds r0, 0x1
-	ldrb r2, [r1]
-	strb r0, [r1]
-	ldrb r2, [r1]
-	movs r0, 0x1
-	ands r0, r2
-	ldrb r2, [r1]
-	strb r0, [r1]
-	ldr r0, =0x00000202
-	adds r1, r3, r0
-	ldrb r0, [r1]
-	adds r0, 0x1
-	ldrb r2, [r1]
-	strb r0, [r1]
-	b _0800DB7A
-	.pool
-_0800DB70:
-	ldr r1, =0x00000203
-	adds r0, r3, r1
-	ldrb r1, [r0]
-	movs r1, 0x1
-	strb r1, [r0]
-_0800DB7A:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_800DB18
-
 	thumb_func_start sub_800DB84
 sub_800DB84: @ 800DB84
 	push {r4,r5,lr}
diff --git a/include/link_rfu.h b/include/link_rfu.h
index ad313d5dad..28e244503d 100644
--- a/include/link_rfu.h
+++ b/include/link_rfu.h
@@ -94,6 +94,13 @@ struct UnkRfuStruct_2_Sub_9e8 {
     /* 0x233 */ vu8 unk_233;
 };
 
+struct UnkRfuStruct_2_Sub_c1c {
+    /* 0x00 */ u8 unk_00[2][14];
+    /* 0x1c */ vu8 unk_1c;
+    /* 0x1d */ vu8 unk_1d;
+    /* 0x1e */ vu8 unk_1e;
+};
+
 struct UnkRfuStruct_Sub_Unused {
     /* 0x000 */ u8 unk_00[2][256];
     /* 0x200 */ vu8 unk_200;
@@ -109,7 +116,8 @@ struct UnkRfuStruct_2 {
     /* 0x06c */ u8 filler_6c[0xb8];
     /* 0x124 */ struct UnkRfuStruct_2_Sub_124 unk_124;
     /* 0x9e8 */ struct UnkRfuStruct_2_Sub_9e8 unk_9e8;
-    /* 0xc1c */ u8 filler_c1c[0x23];
+    /* 0xc1c */ struct UnkRfuStruct_2_Sub_c1c unk_c1c;
+    /* 0xc3c */ u8 filler_c3c[3];
     /* 0xc3f */ u8 filler_c3f[0xb9];
 }; // size = 0xcf8
 
diff --git a/src/link_rfu.c b/src/link_rfu.c
index e3ed186042..63776a298b 100644
--- a/src/link_rfu.c
+++ b/src/link_rfu.c
@@ -38,6 +38,7 @@ static void sub_800D358(u8 a0);
 static void sub_800D434(void);
 static void sub_800D610(void);
 void sub_800D630(void);
+bool8 sub_800DAC8(struct UnkRfuStruct_2_Sub_c1c *q1, u8 *q2);
 
 // .rodata
 
@@ -1596,3 +1597,71 @@ bool8 sub_800D9DC(struct UnkRfuStruct_2_Sub_9e8 *q1, u8 *q2)
     REG_IME = imeBak;
     return TRUE;
 }
+
+void sub_800DA68(struct UnkRfuStruct_2_Sub_c1c *q1, const u8 *q2)
+{
+    int i;
+
+    if (q2[1] == 0)
+    {
+        sub_800DAC8(q1, NULL);
+    }
+    else
+    {
+        for (i = 0; i < 14; i++)
+        {
+            q1->unk_00[q1->unk_1c][i] = q2[i];
+        }
+        q1->unk_1c++;
+        q1->unk_1c %= 2;
+        if (q1->unk_1e < 2)
+        {
+            q1->unk_1e++;
+        }
+        else
+        {
+            q1->unk_1d = q1->unk_1c;
+        }
+    }
+}
+
+bool8 sub_800DAC8(struct UnkRfuStruct_2_Sub_c1c *q1, u8 *q2)
+{
+    int i;
+
+    if (q1->unk_1e == 0)
+    {
+        return FALSE;
+    }
+    if (q2 != NULL)
+    {
+        for (i = 0; i < 14; i++)
+        {
+            q2[i] = q1->unk_00[q1->unk_1d][i];
+        }
+    }
+    q1->unk_1d++;
+    q1->unk_1d %= 2;
+    q1->unk_1e--;
+    return TRUE;
+}
+
+void sub_800DB18(struct UnkRfuStruct_Sub_Unused *q1, u8 *q2)
+{
+    int i;
+
+    if (q1->unk_202 < 2)
+    {
+        for (i = 0; i < 256; i++)
+        {
+            q1->unk_00[q1->unk_200][i] = q2[i];
+        }
+        q1->unk_200++;
+        q1->unk_200 %= 2;
+        q1->unk_202++;
+    }
+    else
+    {
+        q1->unk_203 = 1;
+    }
+}