trade through sub_804D814

asm/trade.s

@@ -5,123 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_804D764
-sub_804D764: @ 804D764
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	movs r3, 0
-	ldr r5, _0804D7B4 @ =gUnknown_2031DA8
-	mov r8, r5
-	ldr r0, _0804D7B8 @ =gSprites
-	mov r12, r0
-	movs r1, 0x5
-	negs r1, r1
-	mov r9, r1
-	movs r4, 0x6
-	movs r7, 0x1
-	movs r6, 0
-_0804D782:
-	mov r1, r8
-	ldr r0, [r1]
-	adds r1, r0, 0
-	adds r1, 0x36
-	ldrb r1, [r1]
-	cmp r3, r1
-	bge _0804D7BC
-	adds r0, 0x28
-	adds r0, r3
-	ldrb r0, [r0]
-	lsls r1, r0, 4
-	adds r1, r0
-	lsls r1, 2
-	add r1, r12
-	adds r1, 0x3E
-	ldrb r2, [r1]
-	mov r0, r9
-	ands r0, r2
-	strb r0, [r1]
-	ldr r0, [r5]
-	adds r0, 0x38
-	adds r0, r3
-	strb r7, [r0]
-	b _0804D7C2
-	.align 2, 0
-_0804D7B4: .4byte gUnknown_2031DA8
-_0804D7B8: .4byte gSprites
-_0804D7BC:
-	adds r0, 0x38
-	adds r0, r3
-	strb r6, [r0]
-_0804D7C2:
-	mov r1, r8
-	ldr r0, [r1]
-	adds r1, r0, 0
-	adds r1, 0x37
-	ldrb r1, [r1]
-	cmp r3, r1
-	bge _0804D7F2
-	adds r0, 0x2E
-	adds r0, r3
-	ldrb r0, [r0]
-	lsls r1, r0, 4
-	adds r1, r0
-	lsls r1, 2
-	add r1, r12
-	adds r1, 0x3E
-	ldrb r2, [r1]
-	mov r0, r9
-	ands r0, r2
-	strb r0, [r1]
-	ldr r0, [r5]
-	adds r0, 0x38
-	adds r0, r4
-	strb r7, [r0]
-	b _0804D7F8
-_0804D7F2:
-	adds r0, 0x38
-	adds r0, r4
-	strb r6, [r0]
-_0804D7F8:
-	adds r4, 0x1
-	adds r3, 0x1
-	cmp r3, 0x5
-	ble _0804D782
-	ldr r0, [r5]
-	adds r0, 0x44
-	movs r1, 0x1
-	strb r1, [r0]
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_804D764
-
-	thumb_func_start sub_804D814
-sub_804D814: @ 804D814
-	push {r4,r5,lr}
-	adds r5, r0, 0
-	adds r4, r1, 0
-	movs r3, 0
-	cmp r3, r2
-	bcs _0804D82E
-_0804D820:
-	adds r0, r5, r3
-	adds r1, r4, r3
-	ldrb r1, [r1]
-	strb r1, [r0]
-	adds r3, 0x1
-	cmp r3, r2
-	bcc _0804D820
-_0804D82E:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_804D814
-
 	thumb_func_start shedinja_maker_maybe
 shedinja_maker_maybe: @ 804D834
 	push {r4-r6,lr}

src/trade.c

@@ -32,8 +32,7 @@ struct TradeResources
     /*0x0034*/ u8 tradeMenuCursorSpriteIdx;
     /*0x0035*/ u8 tradeMenuCursorPosition;
     /*0x0036*/ u8 partyCounts[2];
-    /*0x0038*/ bool8 tradeMenuOptionsActive[12];
-    /*0x0044*/ u8 unk_44;
+    /*0x0038*/ bool8 tradeMenuOptionsActive[13];
     /*0x0045*/ u8 unk_45[2][PARTY_SIZE];
     /*0x0051*/ u8 unk_51[2][PARTY_SIZE];
     /*0x005D*/ u8 unk_5D[2][PARTY_SIZE];
@@ -2319,3 +2318,37 @@ void sub_804D694(u8 state)
         break;
     }
 }
+
+void sub_804D764(void)
+{
+    int i;
+    for (i = 0; i < PARTY_SIZE; i++)
+    {
+        if (i < gUnknown_2031DA8->partyCounts[0])
+        {
+            gSprites[gUnknown_2031DA8->partyIcons[0][i]].invisible = FALSE;
+            gUnknown_2031DA8->tradeMenuOptionsActive[i] = TRUE;
+        }
+        else
+        {
+            gUnknown_2031DA8->tradeMenuOptionsActive[i] = FALSE;
+        }
+        if (i < gUnknown_2031DA8->partyCounts[1])
+        {
+            gSprites[gUnknown_2031DA8->partyIcons[1][i]].invisible = FALSE;
+            gUnknown_2031DA8->tradeMenuOptionsActive[i + 6] = TRUE;
+        }
+        else
+        {
+            gUnknown_2031DA8->tradeMenuOptionsActive[i + 6] = FALSE;
+        }
+    }
+    gUnknown_2031DA8->tradeMenuOptionsActive[12] = TRUE;
+}
+
+void sub_804D814(char *dest, const char *src, size_t size)
+{
+    int i;
+    for (i = 0; i < size; i++)
+        dest[i] = src[i];
+}