/// <summary>
/// 给ROM打IPS补丁
/// </summary>
/// <param name="IPSFileName">IPS补丁文件名</param>
/// <param name="ROMFileName">ROM文件名</param>
public static void ApplyPatchToROM(string IPSFileName, string ROMFileName)
{
IPSInfo info = LoadIPS(IPSFileName);
if (info == null)
{
return;
}
FileStream fs = new FileStream(ROMFileName, FileMode.Open);
if (fs != null)
{
BinaryWriter bw = new BinaryWriter(fs);
if (bw != null)
{
foreach (RecordInfo ri in info.records)
{
bw.Seek(ri.offset, SeekOrigin.Begin);
if (ri.isRLE)
{
for (int i = 0; i < ri.len; ++i)
{
bw.Write(ri.data);
}
}
else
{
bw.Write(ri.data);
}
}
bw.Flush();
bw.Close();
bw.Dispose();
bw = null;
}
fs.Close();
fs.Dispose();
fs = null;
}
}
/// <summary>
/// 载入IPS补丁，获得补丁信息
/// </summary>
/// <param name="IPSFileName">IPS补丁文件名</param>
/// <returns>补丁信息</returns>
public static IPSInfo LoadIPS(string IPSFileName)
{
IPSInfo info = null;
FileStream fs = new FileStream(IPSFileName, FileMode.Open);
if (fs != null)
{
BinaryReader br = new BinaryReader(fs);
if (br != null)
{
info = new IPSInfo();
// 先读5字节的patch
Byte[] patch = br.ReadBytes(5);
if (patch[0] != 'P' || patch[1] != 'A' || patch[1] != 'T' || patch[1] != 'C' || patch[1] != 'H')
{
info = null;
}
if (info != null)
{
info.records = new List <RecordInfo>();
// 循环读取记录，直到读到eof为止
while (true)
{
RecordInfo ri = new RecordInfo();
// 先读3字节
Byte[] data = br.ReadBytes(3);
// 检测是否读到了eof，是的话就跳出循环
if (data[0] == 'E' && data[1] == 'O' && data[2] == 'F')
{
break;
}
// 3字节的offset
ri.offset = ((int)data[0] << 16) | ((int)data[1] << 8) | ((int)data[2] << 0);
// 再读2字节
data = br.ReadBytes(2);
// 检测是否是00 00。如果是的话则证明是RLE记录
if (data[0] == 0 && data[1] == 0)
{
ri.isRLE = true;
// 再读2字节作为len
data = br.ReadBytes(2);
ri.len = (short)(((short)data[0] << 8) | ((short)data[1] << 0));
// 再读1字节作为RLE数据
ri.data = br.ReadBytes(1);
}
// 不是RLE记录
else
{
ri.isRLE = false;
// 2字节的len
ri.len = (short)(((short)data[0] << 8) | ((short)data[1] << 0));
// 再读len字节作为数据
ri.data = br.ReadBytes(ri.len);
}
info.records.Add(ri);
}
//// 如果此时已经读完了IPS文件，则无truncate，否则再读3字节作为truncateOffset
//if (br.BaseStream.Position >= br.BaseStream.Length)
//{
// info.truncateOffset = 0;
//}
//else
//{
// Byte[] data = br.ReadBytes(3);
// info.truncateOffset = ((int)data[0] << 16) | ((int)data[1] << 8) | ((int)data[2] << 0);
//}
}
br.Close();
br.Dispose();
br = null;
}
fs.Close();
fs.Dispose();
fs = null;
}
return(info);
}
/// <summary>
/// 给ROM打补丁，并生成IPS文件
/// </summary>
/// <param name="fileName">ROM文件名</param>
/// <param name="prgData">PRG补丁数据。如果为null的话则PRG无需打补丁</param>
/// <param name="chrData">CHR补丁数据。如果为null的话则CHR无需打补丁</param>
/// <param name="IPSFileName">IPS补丁文件名</param>
public static void CreateIPS(string fileName, Byte[] prgData, Byte[] chrData, string IPSFileName)
{
// 获得原始ROM数据
Byte[] romData = null;
FileStream fs = new FileStream(fileName, FileMode.Open);
if (fs != null)
{
BinaryReader br = new BinaryReader(fs);
if (br != null)
{
romData = br.ReadBytes((int)fs.Length);
br.Close();
br.Dispose();
br = null;
}
fs.Close();
fs.Dispose();
fs = null;
}
if (prgData == null)
{
prgData = GetPRGData(fileName);
}
if (chrData == null)
{
chrData = GetCHRData(fileName);
}
// 获得新ROM数据
Byte[] newROMData = new Byte[romData.Length];
for (int i = 0; i < 16; ++i)
{
newROMData[0 + i] = romData[i];
}
for (int i = 0; i < prgData.Length; ++i)
{
newROMData[16 + i] = prgData[i];
}
for (int i = 0; i < chrData.Length; ++i)
{
newROMData[16 + prgData.Length + i] = chrData[i];
}
// 差异对比
IPSInfo info = new IPSInfo();
info.patch = new char[] { 'P', 'A', 'T', 'C', 'H' };
info.records = new List <RecordInfo>();
int offset = 0;
while (offset < Math.Min(romData.Length, newROMData.Length))
{
if (romData[offset] != newROMData[offset])
{
RecordInfo ri = new RecordInfo();
short RLERecordLen = getRLERecord(newROMData, offset);
if (RLERecordLen > 1)
{
ri.isRLE = true;
ri.len = RLERecordLen;
ri.data = new Byte[] { newROMData[offset] };
offset += RLERecordLen;
}
else
{
ri.isRLE = false;
ri.data = getRecord(romData, newROMData, offset);
ri.len = (short)ri.data.Length;
offset += ri.len;
}
info.records.Add(ri);
}
}
if (newROMData.Length > romData.Length)
{
RecordInfo ri = new RecordInfo();
ri.isRLE = false;
ri.len = (short)(newROMData.Length - romData.Length);
ri.data = new Byte[ri.len];
for (int i = 0; i < ri.data.Length; ++i)
{
ri.data[i] = newROMData[romData.Length + i];
}
info.records.Add(ri);
}
else if (newROMData.Length < romData.Length)
{
Console.WriteLine("暂不支持truncate！");
}
info.eof = new char[] { 'E', 'O', 'F' };
// 写IPS文件
fs = new FileStream(IPSFileName, FileMode.Create);
if (fs != null)
{
BinaryWriter bw = new BinaryWriter(fs);
if (bw != null)
{
bw.Write(info.patch);
foreach (RecordInfo ri in info.records)
{
bw.Write((Byte)((ri.offset >> 16) & 0xFF));
bw.Write((Byte)((ri.offset >> 8) & 0xFF));
bw.Write((Byte)((ri.offset >> 0) & 0xFF));
if (ri.isRLE)
{
bw.Write((Byte)0);
bw.Write((Byte)0);
}
bw.Write((Byte)((ri.len >> 8) & 0xFF));
bw.Write((Byte)((ri.len >> 0) & 0xFF));
foreach (Byte b in ri.data)
{
bw.Write(b);
}
}
bw.Write(info.eof);
bw.Flush();
bw.Close();
bw.Dispose();
bw = null;
}
fs.Close();
fs.Dispose();
fs = null;
}
}
