1 files changed, 226 insertions, 1 deletions

diff --git a/src/event_data.c b/src/event_data.c
index 1545ab6e7..fb2edb063 100644
--- a/src/event_data.c
+++ b/src/event_data.c
@@ -1,7 +1,33 @@
 #include "global.h"
 #include "event_data.h"
 
-extern u8 gUnknown_020375FC[16];
+#define TEMP_FLAGS_SIZE 0x4
+#define TEMP_UPPER_FLAGS_SIZE 0x8
+#define TEMP_VARS_SIZE 0x20
+
+EWRAM_DATA u16 gSpecialVar_0x8000 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8001 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8002 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8003 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8004 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8005 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8006 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8007 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8008 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8009 = 0;
+EWRAM_DATA u16 gSpecialVar_0x800A = 0;
+EWRAM_DATA u16 gSpecialVar_0x800B = 0;
+EWRAM_DATA u16 gScriptResult = 0;
+EWRAM_DATA u16 gScriptLastTalked = 0;
+EWRAM_DATA u16 gScriptFacing = 0;
+EWRAM_DATA u16 gSpecialVar_0x8012 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8013 = 0;
+EWRAM_DATA u16 gSpecialVar_0x8014 = 0;
+EWRAM_DATA static u8 gUnknown_020375FC[16] = {0};
+
+extern u16 * const gSpecialVars[];
+
+extern void sub_80BB358(void);
 
 void InitEventData(void)
 {
@@ -9,3 +35,202 @@ void InitEventData(void)
     memset(gSaveBlock1Ptr->vars, 0, sizeof(gSaveBlock1Ptr->vars));
     memset(gUnknown_020375FC, 0, sizeof(gUnknown_020375FC));
 }
+
+void ClearTempFieldEventData(void)
+{
+    memset(gSaveBlock1Ptr->flags, 0, TEMP_FLAGS_SIZE);
+    memset(gSaveBlock1Ptr->vars, 0, TEMP_VARS_SIZE);
+    FlagReset(SYS_ENC_UP_ITEM);
+    FlagReset(SYS_ENC_DOWN_ITEM);
+    FlagReset(SYS_USE_STRENGTH);
+    FlagReset(SYS_CTRL_OBJ_DELETE);
+    FlagReset(SYS_UNKNOWN_880);
+}
+
+// probably had different flag splits at one point.
+void ClearUpperFlags(void)
+{
+    memset(gSaveBlock1Ptr->flags + 0x124, 0, TEMP_UPPER_FLAGS_SIZE);
+}
+
+void DisableNationalPokedex(void)
+{
+    u16 *nationalDexVar = GetVarPointer(VAR_NATIONAL_DEX);
+    gSaveBlock2Ptr->pokedex.nationalMagic = 0;
+    *nationalDexVar = 0;
+    FlagReset(SYS_NATIONAL_DEX);
+}
+
+void EnableNationalPokedex(void)
+{
+    u16 *nationalDexVar = GetVarPointer(VAR_NATIONAL_DEX);
+    gSaveBlock2Ptr->pokedex.nationalMagic = 0xDA;
+    *nationalDexVar = 0x302;
+    FlagSet(SYS_NATIONAL_DEX);
+    gSaveBlock2Ptr->pokedex.unknown1 = 1;
+    gSaveBlock2Ptr->pokedex.order = 0;
+    sub_80BB358();
+}
+
+bool32 IsNationalPokedexEnabled(void)
+{
+    if (gSaveBlock2Ptr->pokedex.nationalMagic == 0xDA && VarGet(VAR_NATIONAL_DEX) == 0x302 && FlagGet(SYS_NATIONAL_DEX))
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void DisableMysteryEvent(void)
+{
+    FlagReset(SYS_MYSTERY_EVENT_ENABLE);
+}
+
+void EnableMysteryEvent(void)
+{
+    FlagSet(SYS_MYSTERY_EVENT_ENABLE);
+}
+
+bool32 IsMysteryEventEnabled(void)
+{
+    return FlagGet(SYS_MYSTERY_EVENT_ENABLE);
+}
+
+void DisableMysteryGift(void)
+{
+    FlagReset(SYS_MYSTERY_GIFT_ENABLE);
+}
+
+void EnableMysteryGift(void)
+{
+    FlagSet(SYS_MYSTERY_GIFT_ENABLE);
+}
+
+bool32 IsMysteryGiftEnabled(void)
+{
+    return FlagGet(SYS_MYSTERY_GIFT_ENABLE);
+}
+
+void sub_809D4D8(void)
+{
+    FlagReset(0x1E4);
+    FlagReset(0x1E5);
+    FlagReset(0x1E6);
+    FlagReset(0x1E7);
+    FlagReset(0x1E8);
+    FlagReset(0x1E9);
+    FlagReset(0x1EA);
+    FlagReset(0x1EB);
+    FlagReset(0x1EC);
+    FlagReset(0x1ED);
+    FlagReset(0x1EE);
+    FlagReset(0x1EF);
+    FlagReset(0x1F0);
+    FlagReset(0x1F1);
+    FlagReset(0x1F2);
+    FlagReset(0x1F3);
+}
+
+void sub_809D570(void)
+{
+    VarSet(0x40DD, 0);
+    VarSet(0x40DE, 0);
+    VarSet(0x40DF, 0);
+    VarSet(0x40E0, 0);
+    VarSet(0x40E1, 0);
+    VarSet(0x40E2, 0);
+    VarSet(0x40E3, 0);
+    VarSet(0x40E4, 0);
+}
+
+void DisableResetRTC(void)
+{
+    VarSet(VAR_RESET_RTC_ENABLE, 0);
+    FlagReset(SYS_RESET_RTC_ENABLE);
+}
+
+void EnableResetRTC(void)
+{
+    VarSet(VAR_RESET_RTC_ENABLE, 0x920);
+    FlagSet(SYS_RESET_RTC_ENABLE);
+}
+
+bool32 CanResetRTC(void)
+{
+    if (FlagGet(SYS_RESET_RTC_ENABLE) && VarGet(VAR_RESET_RTC_ENABLE) == 0x920)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+u16 *GetVarPointer(u16 id)
+{
+    if (id < 0x4000)
+        return NULL;
+
+    if ((s16)id >= 0)
+        return &gSaveBlock1Ptr->vars[id - 0x4000];
+
+    return gSpecialVars[id - 0x8000];
+}
+
+u16 VarGet(u16 id)
+{
+    u16 *ptr = GetVarPointer(id);
+    if (!ptr)
+        return id;
+    return *ptr;
+}
+
+bool8 VarSet(u16 id, u16 value)
+{
+    u16 *ptr = GetVarPointer(id);
+    if (!ptr)
+        return FALSE;
+    *ptr = value;
+    return TRUE;
+}
+
+u8 VarGetFieldObjectGraphicsId(u8 id)
+{
+    return VarGet(0x4010 + id);
+}
+
+u8 *GetFlagPointer(u16 id)
+{
+    if (id == 0)
+        return 0;
+
+    if (id < 0x4000)
+        return &gSaveBlock1Ptr->flags[id / 8];
+
+    return &gUnknown_020375FC[(id - 0x4000) / 8];
+}
+
+u8 FlagSet(u16 id)
+{
+    u8 *ptr = GetFlagPointer(id);
+    if (ptr)
+        *ptr |= 1 << (id & 7);
+    return 0;
+}
+
+u8 FlagReset(u16 id)
+{
+    u8 *ptr = GetFlagPointer(id);
+    if (ptr)
+        *ptr &= ~(1 << (id & 7));
+    return 0;
+}
+
+bool8 FlagGet(u16 id)
+{
+    u8 *ptr = GetFlagPointer(id);
+
+    if (!ptr)
+        return FALSE;
+
+    if (!(((*ptr) >> (id & 7)) & 1))
+        return FALSE;
+
+    return TRUE;
+}