decompile load_save.c

1 files changed, 297 insertions, 0 deletions

diff --git a/src/load_save.c b/src/load_save.c
new file mode 100644
index 000000000..eba01642c
--- /dev/null
+++ b/src/load_save.c
@@ -0,0 +1,297 @@
+#include "global.h"
+#include "gba/flash_internal.h"
+#include "load_save.h"
+#include "main.h"
+#include "pokemon.h"
+#include "random.h"
+#include "malloc.h"
+#include "item.h"
+
+extern void sub_8099E44(void);
+extern void sub_8110840(void *oldSave);
+extern void sub_8055778(int);
+extern void sub_8054F38(u32 newKey);
+extern void ApplyNewEncryptionKeyToBagItems_(u32 newKey);
+extern void sub_815EE6C(u32 newKey);
+
+#define SAVEBLOCK_MOVE_RANGE    128
+
+struct LoadedSaveData
+{
+ /*0x0000*/ struct ItemSlot items[BAG_ITEMS_COUNT];
+ /*0x0078*/ struct ItemSlot keyItems[BAG_KEYITEMS_COUNT];
+ /*0x00F0*/ struct ItemSlot pokeBalls[BAG_POKEBALLS_COUNT];
+ /*0x0130*/ struct ItemSlot TMsHMs[BAG_TMHM_COUNT];
+ /*0x0230*/ struct ItemSlot berries[BAG_BERRIES_COUNT];
+ /*0x02E8*/ struct MailStruct mail[MAIL_COUNT];
+};
+
+// EWRAM DATA
+EWRAM_DATA struct SaveBlock2 gSaveBlock2 = {0};
+EWRAM_DATA u8 gSaveBlock2_DMA[SAVEBLOCK_MOVE_RANGE] = {0};
+
+EWRAM_DATA struct SaveBlock1 gSaveBlock1 = {0};
+EWRAM_DATA u8 gSaveBlock1_DMA[SAVEBLOCK_MOVE_RANGE] = {0};
+
+EWRAM_DATA struct PokemonStorage gPokemonStorage = {0};
+EWRAM_DATA u8 gSaveBlock3_DMA[SAVEBLOCK_MOVE_RANGE] = {0};
+
+EWRAM_DATA struct LoadedSaveData gLoadedSaveData = {0};
+EWRAM_DATA u32 gLastEncryptionKey = 0;
+
+// IWRAM common
+IWRAM_DATA bool32 gFlashMemoryPresent;
+IWRAM_DATA struct SaveBlock1 *gSaveBlock1Ptr;
+IWRAM_DATA struct SaveBlock2 *gSaveBlock2Ptr;
+IWRAM_DATA struct PokemonStorage *gPokemonStoragePtr;
+
+void CheckForFlashMemory(void)
+{
+    if (!IdentifyFlash())
+    {
+        gFlashMemoryPresent = TRUE;
+        InitFlashTimer();
+    }
+    else
+    {
+        gFlashMemoryPresent = FALSE;
+    }
+}
+
+void ClearSav2(void)
+{
+    CpuFill16(0, &gSaveBlock2, sizeof(struct SaveBlock2) + sizeof(gSaveBlock2_DMA));
+}
+
+void ClearSav1(void)
+{
+    CpuFill16(0, &gSaveBlock1, sizeof(struct SaveBlock1) + sizeof(gSaveBlock1_DMA));
+}
+
+void SetSaveBlocksPointers(void)
+{
+    u32 offset;
+    struct SaveBlock1** sav1_LocalVar = &gSaveBlock1Ptr;
+    void *oldSave = (void *)gSaveBlock1Ptr;
+
+    offset = (Random()) & (SAVEBLOCK_MOVE_RANGE - 4);
+
+    gSaveBlock2Ptr = (void*)(&gSaveBlock2) + offset;
+    *sav1_LocalVar = (void*)(&gSaveBlock1) + offset;
+    gPokemonStoragePtr = (void*)(&gPokemonStorage) + offset;
+
+    sub_8099E44();
+    sub_8110840(oldSave);
+}
+
+void MoveSaveBlocks_ResetHeap(void)
+{
+    void *vblankCB, *hblankCB;
+    u32 encryptionKey;
+    struct SaveBlock2 *saveBlock2Copy;
+    struct SaveBlock1 *saveBlock1Copy;
+    struct PokemonStorage *pokemonStorageCopy;
+
+    // save interrupt functions and turn them off
+    vblankCB = gMain.vblankCallback;
+    hblankCB = gMain.hblankCallback;
+    gMain.vblankCallback = NULL;
+    gMain.hblankCallback = NULL;
+    gMain.vblankCounter1 = NULL;
+    
+    saveBlock2Copy = (struct SaveBlock2 *)(gHeap);
+    saveBlock1Copy = (struct SaveBlock1 *)(gHeap + sizeof(struct SaveBlock2));
+    pokemonStorageCopy = (struct PokemonStorage *)(gHeap + sizeof(struct SaveBlock2) + sizeof(struct SaveBlock1));
+
+    // backup the saves.
+    *saveBlock2Copy = *gSaveBlock2Ptr;
+    *saveBlock1Copy = *gSaveBlock1Ptr;
+    *pokemonStorageCopy = *gPokemonStoragePtr;
+
+    // change saveblocks' pointers
+    SetSaveBlocksPointers(); // unlike Emerald, this does not use
+                             // the trainer ID sum for an offset.
+
+    // restore saveblock data since the pointers changed
+    *gSaveBlock2Ptr = *saveBlock2Copy;
+    *gSaveBlock1Ptr = *saveBlock1Copy;
+    *gPokemonStoragePtr = *pokemonStorageCopy;
+
+    // heap was destroyed in the copying process, so reset it
+    InitHeap(gHeap, HEAP_SIZE);
+
+    // restore interrupt functions
+    gMain.hblankCallback = hblankCB;
+    gMain.vblankCallback = vblankCB;
+
+    // create a new encryption key
+    encryptionKey = (Random() << 0x10) + (Random());
+    ApplyNewEncryptionKeyToAllEncryptedData(encryptionKey);
+    gSaveBlock2Ptr->encryptionKey = encryptionKey;
+}
+
+u32 sav2_x1_query_bit1(void)
+{
+    return gSaveBlock2Ptr->specialSaveWarp & 1;
+}
+
+void sav2_x9_clear_bit1(void)
+{
+    gSaveBlock2Ptr->specialSaveWarp &= ~1;
+}
+
+void sub_804C1AC(void)
+{
+    gSaveBlock2Ptr->specialSaveWarp |= 1;
+}
+
+void sub_804C1C0(void)
+{
+    sub_8055778(0);
+    gSaveBlock2Ptr->specialSaveWarp |= 1;
+}
+
+void sav2_gender2_inplace_and_xFE(void)
+{
+    gSaveBlock2Ptr->specialSaveWarp &= ~1;
+}
+
+void SavePlayerParty(void)
+{
+    int i;
+
+    gSaveBlock1Ptr->playerPartyCount = gPlayerPartyCount;
+
+    for (i = 0; i < PARTY_SIZE; i++)
+        gSaveBlock1Ptr->playerParty[i] = gPlayerParty[i];
+}
+
+void LoadPlayerParty(void)
+{
+    int i;
+
+    gPlayerPartyCount = gSaveBlock1Ptr->playerPartyCount;
+
+    for (i = 0; i < PARTY_SIZE; i++)
+        gPlayerParty[i] = gSaveBlock1Ptr->playerParty[i];
+}
+
+void SaveMapObjects(void)
+{
+    int i;
+
+    for (i = 0; i < NUM_FIELD_OBJECTS; i++)
+        gSaveBlock1Ptr->mapObjects[i] = gMapObjects[i];
+}
+
+void LoadMapObjects(void)
+{
+    int i;
+
+    for (i = 0; i < NUM_FIELD_OBJECTS; i++)
+        gMapObjects[i] = gSaveBlock1Ptr->mapObjects[i];
+}
+
+void SaveSerializedGame(void)
+{
+    SavePlayerParty();
+    SaveMapObjects();
+}
+
+void LoadSerializedGame(void)
+{
+    LoadPlayerParty();
+    LoadMapObjects();
+}
+
+void LoadPlayerBag(void)
+{
+    int i;
+
+    // load player items.
+    for (i = 0; i < BAG_ITEMS_COUNT; i++)
+        gLoadedSaveData.items[i] = gSaveBlock1Ptr->bagPocket_Items[i];
+
+    // load player key items.
+    for (i = 0; i < BAG_KEYITEMS_COUNT; i++)
+        gLoadedSaveData.keyItems[i] = gSaveBlock1Ptr->bagPocket_KeyItems[i];
+
+    // load player pokeballs.
+    for (i = 0; i < BAG_POKEBALLS_COUNT; i++)
+        gLoadedSaveData.pokeBalls[i] = gSaveBlock1Ptr->bagPocket_PokeBalls[i];
+
+    // load player TMs and HMs.
+    for (i = 0; i < BAG_TMHM_COUNT; i++)
+        gLoadedSaveData.TMsHMs[i] = gSaveBlock1Ptr->bagPocket_TMHM[i];
+
+    // load player berries.
+    for (i = 0; i < BAG_BERRIES_COUNT; i++)
+        gLoadedSaveData.berries[i] = gSaveBlock1Ptr->bagPocket_Berries[i];
+
+    // load mail.
+    for (i = 0; i < MAIL_COUNT; i++)
+        gLoadedSaveData.mail[i] = gSaveBlock1Ptr->mail[i];
+
+    gLastEncryptionKey = gSaveBlock2Ptr->encryptionKey;
+}
+
+void SavePlayerBag(void)
+{
+    int i;
+    u32 encryptionKeyBackup;
+
+    // save player items.
+    for (i = 0; i < BAG_ITEMS_COUNT; i++)
+        gSaveBlock1Ptr->bagPocket_Items[i] = gLoadedSaveData.items[i];
+
+    // save player key items.
+    for (i = 0; i < BAG_KEYITEMS_COUNT; i++)
+        gSaveBlock1Ptr->bagPocket_KeyItems[i] = gLoadedSaveData.keyItems[i];
+
+    // save player pokeballs.
+    for (i = 0; i < BAG_POKEBALLS_COUNT; i++)
+        gSaveBlock1Ptr->bagPocket_PokeBalls[i] = gLoadedSaveData.pokeBalls[i];
+
+    // save player TMs and HMs.
+    for (i = 0; i < BAG_TMHM_COUNT; i++)
+        gSaveBlock1Ptr->bagPocket_TMHM[i] = gLoadedSaveData.TMsHMs[i];
+
+    // save player berries.
+    for (i = 0; i < BAG_BERRIES_COUNT; i++)
+        gSaveBlock1Ptr->bagPocket_Berries[i] = gLoadedSaveData.berries[i];
+
+    // save mail.
+    for (i = 0; i < MAIL_COUNT; i++)
+        gSaveBlock1Ptr->mail[i] = gLoadedSaveData.mail[i];
+
+    encryptionKeyBackup = gSaveBlock2Ptr->encryptionKey;
+    gSaveBlock2Ptr->encryptionKey = gLastEncryptionKey;
+    ApplyNewEncryptionKeyToBagItems(encryptionKeyBackup);
+    gSaveBlock2Ptr->encryptionKey = encryptionKeyBackup;
+}
+
+void ApplyNewEncryptionKeyToHword(u16 *hWord, u32 newKey)
+{
+    *hWord ^= gSaveBlock2Ptr->encryptionKey;
+    *hWord ^= newKey;
+}
+
+void ApplyNewEncryptionKeyToWord(u32 *word, u32 newKey)
+{
+    *word ^= gSaveBlock2Ptr->encryptionKey;
+    *word ^= newKey;
+}
+
+void ApplyNewEncryptionKeyToAllEncryptedData(u32 encryptionKey)
+{
+    int i;
+
+    for(i = 0; i < 4; i++)
+        ApplyNewEncryptionKeyToWord(&gSaveBlock1Ptr->unkArray[i][1], encryptionKey);
+
+    sub_8054F38(encryptionKey);
+    ApplyNewEncryptionKeyToBagItems_(encryptionKey);
+    sub_815EE6C(encryptionKey);
+    ApplyNewEncryptionKeyToWord(&gSaveBlock1Ptr->money, encryptionKey);
+    ApplyNewEncryptionKeyToHword(&gSaveBlock1Ptr->coins, encryptionKey);
+}