start decompiling rom3 (#198)

* start decompiling rom3

* newline

* decompile sub_800BA78

2 files changed, 258 insertions, 1 deletions

diff --git a/src/battle_anim.c b/src/battle_anim.c
index 90a53a412..264a1dd9e 100644
--- a/src/battle_anim.c
+++ b/src/battle_anim.c
@@ -232,7 +232,7 @@ static void (*const sScriptCmdTable[])(void) = {
     ScriptCmd_stopsound,
 };
 
-void sub_8075624(void)
+void battle_anim_clear_some_data(void)
 {
     s32 i;
 
diff --git a/src/rom3.c b/src/rom3.c
new file mode 100644
index 000000000..9bd2674c5
--- /dev/null
+++ b/src/rom3.c
@@ -0,0 +1,257 @@
+#include "global.h"
+#include "asm.h"
+#include "battle.h"
+#include "items.h"
+#include "link.h"
+#include "pokemon.h"
+#include "species.h"
+#include "task.h"
+
+extern u16 gBattleTypeFlags;
+
+extern u32 gUnknown_020239FC;
+extern u32 gUnknown_02024A64;
+extern u8 gUnknown_02024A68;
+extern u16 gUnknown_02024A6A[];
+extern u8 gUnknown_02024A72[];
+extern u8 gUnknown_02024C78;
+extern u8 gUnknown_02024E60[];
+extern u8 gUnknown_02024E64[];
+extern void (*gUnknown_030042D4)(void);
+extern void (*gUnknown_03004330[])(void);
+
+extern void sub_800BF28(void);
+extern void sub_8083C50(u8);
+extern void nullsub_41(void);
+extern void nullsub_91(void);
+extern void battle_anim_clear_some_data(void);
+extern void sub_8040710(void);
+extern void BattleAI_HandleItemUseBeforeAISetup(void);
+extern void sub_8094978(u8, int);
+extern void sub_800BA78(void);
+extern void sub_800B9A8(void);
+extern void sub_800BD54(void);
+extern void sub_8010800(void);
+extern void sub_812B468(void);
+extern void sub_8137224(void);
+extern void sub_802BF74(void);
+extern void sub_8032AE0(void);
+extern void sub_8037510(void);
+extern void sub_811DA78(void);
+
+void sub_800B858(void)
+{
+    if (gBattleTypeFlags & 2)
+    {
+        OpenLink();
+        CreateTask(sub_8083C50, 0);
+        sub_800BF28();
+    }
+}
+
+void setup_poochyena_battle(void)
+{
+    s32 i;
+    
+    gUnknown_030042D4 = nullsub_41;
+    for (i = 0; i < 4; i++)
+    {
+        gUnknown_03004330[i] = nullsub_91;
+        gUnknown_02024A72[i] = 0xFF;
+        gUnknown_02024E60[i] = 0;
+        gUnknown_02024E64[i] = 0;
+    }
+    sub_800B858();
+    gUnknown_02024A64 = 0;
+    battle_anim_clear_some_data();
+    sub_8040710();
+    BattleAI_HandleItemUseBeforeAISetup();
+    if (gBattleTypeFlags & 0x10)
+    {
+        ZeroEnemyPartyMons();
+        CreateMon(&gEnemyParty[0], SPECIES_POOCHYENA, 2, 32, 0, 0, 0, 0);
+        i = ITEM_NONE;
+        SetMonData(&gEnemyParty[0], MON_DATA_HELD_ITEM, (u8 *)&i);
+    }
+    gUnknown_020239FC = 0;
+    gUnknown_02024C78 = 0;
+}
+
+void sub_800B950(void)
+{
+    s32 i;
+    
+    if (gBattleTypeFlags & 2)
+        sub_800BA78();
+    else
+        sub_800B9A8();
+    sub_800BD54();
+    if (!(gBattleTypeFlags & 0x40))
+    {
+        for (i = 0; i < gUnknown_02024A68; i++)
+            sub_8094978(i, 0);
+    }
+}
+
+void sub_800B9A8(void)
+{
+    if (!(gBattleTypeFlags & 1))
+    {
+        gUnknown_030042D4 = sub_8010800;
+        if (gBattleTypeFlags & 0x80)
+            gUnknown_03004330[0] = sub_812B468;
+        else if (gBattleTypeFlags & 0x200)
+            gUnknown_03004330[0] = sub_8137224;
+        else
+            gUnknown_03004330[0] = sub_802BF74;
+        gUnknown_02024A72[0] = 0;
+        gUnknown_03004330[1] = sub_8032AE0;
+        gUnknown_02024A72[1] = 1;
+        gUnknown_02024A68 = 2;
+    }
+    else
+    {
+        gUnknown_030042D4 = sub_8010800;
+        gUnknown_03004330[0] = sub_802BF74;
+        gUnknown_02024A72[0] = 0;
+        gUnknown_03004330[1] = sub_8032AE0;
+        gUnknown_02024A72[1] = 1;
+        gUnknown_03004330[2] = sub_802BF74;
+        gUnknown_02024A72[2] = 2;
+        gUnknown_03004330[3] = sub_8032AE0;
+        gUnknown_02024A72[3] = 3;
+        gUnknown_02024A68 = 4;
+    }
+}
+
+void sub_800BA78(void)
+{
+    u8 multiplayerId;
+    int i;
+    
+    if (!(gBattleTypeFlags & BATTLE_TYPE_DOUBLE))
+    {
+        if (gBattleTypeFlags & BATTLE_TYPE_WILD)
+        {
+            gUnknown_030042D4 = sub_8010800;
+            gUnknown_03004330[0] = sub_802BF74;
+            gUnknown_02024A72[0] = 0;
+            gUnknown_03004330[1] = sub_8037510;
+            gUnknown_02024A72[1] = 1;
+            gUnknown_02024A68 = 2;
+        }
+        else
+        {
+            gUnknown_03004330[1] = sub_802BF74;
+            gUnknown_02024A72[1] = 0;
+            gUnknown_03004330[0] = sub_8037510;
+            gUnknown_02024A72[0] = 1;
+            gUnknown_02024A68 = 2;
+        }
+        return;
+    }
+    if ((gBattleTypeFlags & (BATTLE_TYPE_40 | BATTLE_TYPE_DOUBLE)) == BATTLE_TYPE_DOUBLE)
+    {
+        if (gBattleTypeFlags & BATTLE_TYPE_WILD)
+        {
+            gUnknown_030042D4 = sub_8010800;
+            gUnknown_03004330[0] = sub_802BF74;
+            gUnknown_02024A72[0] = 0;
+            gUnknown_03004330[1] = sub_8037510;
+            gUnknown_02024A72[1] = 1;
+            gUnknown_03004330[2] = sub_802BF74;
+            gUnknown_02024A72[2] = 2;
+            gUnknown_03004330[3] = sub_8037510;
+            gUnknown_02024A72[3] = 3;
+            gUnknown_02024A68 = 4;
+        }
+        else
+        {
+            gUnknown_03004330[1] = sub_802BF74;
+            gUnknown_02024A72[1] = 0;
+            gUnknown_03004330[0] = sub_8037510;
+            gUnknown_02024A72[0] = 1;
+            gUnknown_03004330[3] = sub_802BF74;
+            gUnknown_02024A72[3] = 2;
+            gUnknown_03004330[2] = sub_8037510;
+            gUnknown_02024A72[2] = 3;
+            gUnknown_02024A68 = 4;
+            
+        }
+        return;
+    }
+    multiplayerId = GetMultiplayerId();
+    if (gBattleTypeFlags & BATTLE_TYPE_WILD)
+        gUnknown_030042D4 = sub_8010800;
+    for (i = 0; i < 4; i++)
+    {
+        switch (gLinkPlayers[i].lp_field_18)
+        {
+        case 0:
+        case 3:
+            sub_8094978(gLinkPlayers[i].lp_field_18, 0);
+            break;
+        case 1:
+        case 2:
+            sub_8094978(gLinkPlayers[i].lp_field_18, 1);
+            break;
+        }
+        
+        if (i == multiplayerId)
+        {
+            gUnknown_03004330[gLinkPlayers[i].lp_field_18] = sub_802BF74;
+            switch (gLinkPlayers[i].lp_field_18)
+            {
+            case 0:
+            case 3:
+                gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 0;
+                gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 0;
+                break;
+            case 1:
+            case 2:
+                gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 2;
+                gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 3;
+                break;
+            }
+        }
+        else
+        {
+            if ((!(gLinkPlayers[i].lp_field_18 & 1) && !(gLinkPlayers[multiplayerId].lp_field_18 & 1))
+             || ((gLinkPlayers[i].lp_field_18 & 1) && (gLinkPlayers[multiplayerId].lp_field_18 & 1)))
+            {
+                gUnknown_03004330[gLinkPlayers[i].lp_field_18] = sub_811DA78;
+                switch (gLinkPlayers[i].lp_field_18)
+                {
+                case 0:
+                case 3:
+                    gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 0;
+                    gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 0;
+                    break;
+                case 1:
+                case 2:
+                    gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 2;
+                    gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 3;
+                    break;
+                }
+            }
+            else
+            {
+                gUnknown_03004330[gLinkPlayers[i].lp_field_18] = sub_8037510;
+                switch (gLinkPlayers[i].lp_field_18)
+                {
+                case 0:
+                case 3:
+                    gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 1;
+                    gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 0;
+                    break;
+                case 1:
+                case 2:
+                    gUnknown_02024A72[gLinkPlayers[i].lp_field_18] = 3;
+                    gUnknown_02024A6A[gLinkPlayers[i].lp_field_18] = 3;
+                    break;
+                }
+            }
+        }
+    }
+    gUnknown_02024A68 = 4;
+}