begin load_save.c

src/load_save.c

@@ -0,0 +1,104 @@
+#include "global.h"
+#include "gba/flash_internal.h"
+#include "load_save.h"
+#include "main.h"
+#include "pokemon.h"
+#include "rng.h"
+#include "malloc.h"
+
+extern u8 gPlayerPartyCount;
+extern struct PokemonStorage* gPokemonStoragePtr;
+extern void* gUnknown_0203CF5C;
+extern u8 gHeap[0x1C000];
+
+extern bool16 IdentifyFlash(void);
+extern void SetBagItemsPointers(void);
+extern void SetDecorationInventoriesPointers(void);
+extern void InitHeap(void *heapStart, u32 heapSize);
+
+void ApplyNewEncyprtionKeyToAllEncryptedData(u32 encryptionKey);
+
+#define SAVEBLOCK_MOVE_RANGE    128
+
+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};
+
+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(u16 offset)
+{
+    struct SaveBlock1** sav1_LocalVar = &gSaveBlock1Ptr;
+
+    offset = (offset + Random()) & (SAVEBLOCK_MOVE_RANGE - 4);
+
+    gSaveBlock2Ptr = (void*)(&gSaveblock2) + offset;
+    *sav1_LocalVar = (void*)(&gSaveblock1) + offset;
+    gPokemonStoragePtr = (void*)(&gPokemonStorage) + offset;
+
+    SetBagItemsPointers();
+    SetDecorationInventoriesPointers();
+}
+/*
+void MoveSaveBlocks_ResetHeap(void)
+{
+    void *vblankCB, *hblankCB;
+    u32 encryptionKey;
+
+    // save interrupt functions and turn them off
+    vblankCB = gMain.vblankCallback;
+    hblankCB = gMain.hblankCallback;
+    gMain.vblankCallback = NULL;
+    gMain.hblankCallback = NULL;
+    gUnknown_0203CF5C = NULL;
+
+    // copy saveblocks' content
+    memcpy(gHeap, gSaveBlock2Ptr, sizeof(struct SaveBlock2));
+    memcpy(gHeap + sizeof(struct SaveBlock2), gSaveBlock1Ptr, sizeof(struct SaveBlock1));
+    memcpy(gHeap + sizeof(struct SaveBlock2) + sizeof(struct SaveBlock1), gPokemonStoragePtr, sizeof(struct PokemonStorage));
+
+    // change saveblocks' pointers
+    // argument is a sum of the individual trainerId bytes
+    SetSaveBlocksPointers(gHeap[10] + gHeap[11] + gHeap[12] + gHeap[13]);
+
+    // restore saveblock data since the pointers changed
+    memcpy(gSaveBlock2Ptr, gHeap, sizeof(struct SaveBlock2));
+    memcpy(gSaveBlock1Ptr, gHeap + sizeof(struct SaveBlock2), sizeof(struct SaveBlock1));
+    memcpy(gPokemonStoragePtr, gHeap + sizeof(struct SaveBlock2) + sizeof(struct SaveBlock1), sizeof(struct PokemonStorage));
+
+    // heap was destroyed in the copying process, so reset it
+    InitHeap(gHeap, sizeof(gHeap));
+
+    // restore interrupt functions
+    gMain.hblankCallback = hblankCB;
+    gMain.vblankCallback = vblankCB;
+
+    // create a new encryption key
+    encryptionKey = (Random() << 0x10) + (Random());
+    ApplyNewEncyprtionKeyToAllEncryptedData(encryptionKey);
+    gSaveBlock2Ptr->encryptionKey = encryptionKey;
+}*/