1 files changed, 163 insertions, 0 deletions
diff --git a/src/event_data.c b/src/event_data.c
new file mode 100644
index 000000000..b1c0632ec
--- /dev/null
+++ b/src/event_data.c
@@ -0,0 +1,163 @@
+#include "global.h"
+#include "event_data.h"
+#include "pokedex.h"
+
+extern u8 gUnknown_0202E8E2[];
+extern u16 *gSpecialVars[];
+
+void InitEventData(void)
+{
+    memset(gSaveBlock1.flags, 0, sizeof(gSaveBlock1.flags));
+    memset(gSaveBlock1.vars, 0, sizeof(gSaveBlock1.vars));
+    memset(gUnknown_0202E8E2, 0, 16);
+}
+
+void ClearTempFieldEventData(void)
+{
+    memset(gSaveBlock1.flags, 0, 4);
+    memset(gSaveBlock1.vars, 0, 32);
+    FlagReset(SYS_ENC_UP_ITEM);
+    FlagReset(SYS_ENC_DOWN_ITEM);
+    FlagReset(SYS_USE_STRENGTH);
+    FlagReset(SYS_CTRL_OBJ_DELETE);
+}
+
+void ClearUpperFlags(void)
+{
+    memset(gSaveBlock1.flags + 0x118, 0, 8);
+}
+
+void DisableNationalPokedex(void)
+{
+    u16 *nationalDexVar = GetVarPointer(VAR_NATIONAL_DEX);
+    gSaveBlock2.pokedex.nationalMagic = 0;
+    *nationalDexVar = 0;
+    FlagReset(SYS_NATIONAL_DEX);
+}
+
+void EnableNationalPokedex(void)
+{
+    u16 *nationalDexVar = GetVarPointer(VAR_NATIONAL_DEX);
+    gSaveBlock2.pokedex.nationalMagic = 0xDA;
+    *nationalDexVar = 0x302;
+    FlagSet(SYS_NATIONAL_DEX);
+    gSaveBlock2.pokedex.unknown1 = 1;
+    gSaveBlock2.pokedex.order = 0;
+    sub_808C0A0();
+}
+
+bool32 IsNationalPokedexEnabled(void)
+{
+    if (gSaveBlock2.pokedex.nationalMagic == 0xDA && VarGet(VAR_NATIONAL_DEX) == 0x302 && FlagGet(SYS_NATIONAL_DEX))
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void DisableMysteryGift(void)
+{
+    FlagReset(SYS_EXDATA_ENABLE);
+}
+
+void EnableMysteryGift(void)
+{
+    FlagSet(SYS_EXDATA_ENABLE);
+}
+
+bool32 IsMysteryGiftEnabled(void)
+{
+    return FlagGet(SYS_EXDATA_ENABLE);
+}
+
+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 &gSaveBlock1.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 &gSaveBlock1.flags[id / 8];
+
+    return &gUnknown_0202E8E2[(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;
+}