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/*
Copyright 2019 Arisotura, Raphaël Zumer
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <string.h>
#include "GBACart.h"
#include "CRC32.h"
#include "Platform.h"
namespace GBACart_SRAM
{
u8* SRAM;
u32 SRAMLength;
char SRAMPath[1024];
bool Init()
{
SRAM = NULL;
return true;
}
void DeInit()
{
if (SRAM) delete[] SRAM;
}
void Reset()
{
if (SRAM) delete[] SRAM;
SRAM = NULL;
}
void DoSavestate(Savestate* file)
{
// TODO?
}
void LoadSave(const char* path)
{
if (SRAM) delete[] SRAM;
strncpy(SRAMPath, path, 1023);
SRAMPath[1023] = '\0';
FILE* f = Platform::OpenFile(path, "rb");
if (f)
{
fseek(f, 0, SEEK_END);
SRAMLength = (u32)ftell(f);
SRAM = new u8[SRAMLength];
fseek(f, 0, SEEK_SET);
fread(SRAM, SRAMLength, 1, f);
fclose(f);
}
else
{
int SRAMLength = 65536; // max GBA SRAM size
SRAM = new u8[SRAMLength];
memset(SRAM, 0xFF, SRAMLength);
}
}
void RelocateSave(const char* path, bool write)
{
if (!write)
{
LoadSave(path); // lazy
return;
}
strncpy(SRAMPath, path, 1023);
SRAMPath[1023] = '\0';
FILE* f = Platform::OpenFile(path, "wb");
if (!f)
{
printf("GBACart_SRAM::RelocateSave: failed to create new file. fuck\n");
return;
}
fwrite(SRAM, SRAMLength, 1, f);
fclose(f);
}
}
namespace GBACart
{
bool CartInserted;
u8* CartROM;
u32 CartROMSize;
u32 CartCRC;
u32 CartID;
bool Init()
{
if (!GBACart_SRAM::Init()) return false;
CartROM = NULL;
return true;
}
void DeInit()
{
if (CartROM) delete[] CartROM;
GBACart_SRAM::DeInit();
}
void Reset()
{
CartInserted = false;
if (CartROM) delete[] CartROM;
CartROM = NULL;
CartROMSize = 0;
GBACart_SRAM::Reset();
}
void DoSavestate(Savestate* file)
{
// TODO?
}
bool LoadROM(const char* path, const char* sram)
{
FILE* f = Platform::OpenFile(path, "rb");
if (!f)
{
return false;
}
if (CartInserted)
{
Reset();
}
fseek(f, 0, SEEK_END);
u32 len = (u32)ftell(f);
CartROMSize = 0x200;
while (CartROMSize < len)
CartROMSize <<= 1;
u32 gamecode;
fseek(f, 0xAC, SEEK_SET);
fread(&gamecode, 4, 1, f);
printf("Game code: %c%c%c%c\n", gamecode&0xFF, (gamecode>>8)&0xFF, (gamecode>>16)&0xFF, gamecode>>24);
CartROM = new u8[CartROMSize];
memset(CartROM, 0, CartROMSize);
fseek(f, 0, SEEK_SET);
fread(CartROM, 1, len, f);
fclose(f);
//CartROM = f;
CartCRC = CRC32(CartROM, CartROMSize);
printf("ROM CRC32: %08X\n", CartCRC);
CartInserted = true;
// save
printf("Save file: %s\n", sram);
GBACart_SRAM::LoadSave(sram);
return true;
}
void RelocateSave(const char* path, bool write)
{
// derp herp
GBACart_SRAM::RelocateSave(path, write);
}
}
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