63 lines
1.5 KiB
C#
63 lines
1.5 KiB
C#
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using System;
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using System.IO;
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using System.Linq;
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using System.Text;
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using BizHawk.Emulation.Common;
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namespace BizHawk.Emulation.Cores.Nintendo.GBA
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{
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public partial class MGBAHawk : ISaveRam
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{
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public byte[] CloneSaveRam()
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{
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int len = LibmGBA.BizGetSaveRam(_core, _saveScratch, _saveScratch.Length);
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if (len == _saveScratch.Length)
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throw new InvalidOperationException("Save buffer not long enough");
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if (len == 0)
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return null;
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var ret = new byte[len];
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Array.Copy(_saveScratch, ret, len);
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return ret;
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}
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private static byte[] LegacyFix(byte[] saveram)
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{
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// at one point vbanext-hawk had a special saveram format which we want to load.
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var br = new BinaryReader(new MemoryStream(saveram, false));
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br.ReadBytes(8); // header;
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int flashSize = br.ReadInt32();
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int eepromsize = br.ReadInt32();
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byte[] flash = br.ReadBytes(flashSize);
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byte[] eeprom = br.ReadBytes(eepromsize);
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if (flash.Length == 0)
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return eeprom;
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else if (eeprom.Length == 0)
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return flash;
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else
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{
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// well, isn't this a sticky situation!
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return flash; // woops
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}
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}
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public void StoreSaveRam(byte[] data)
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{
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if (data.Take(8).SequenceEqual(Encoding.ASCII.GetBytes("GBABATT\0")))
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{
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data = LegacyFix(data);
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}
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LibmGBA.BizPutSaveRam(_core, data, data.Length);
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}
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public bool SaveRamModified
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{
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get
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{
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return LibmGBA.BizGetSaveRam(_core, _saveScratch, _saveScratch.Length) > 0;
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}
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}
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}
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}
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