public static void Compress(string source, string destination)
{
RPX rpx = new RPX(source);
int shSize = rpx.Header.e_shnum * 0x2C; // 0x2C = rpx.Header.e_shentsize + 4 bytes of CRC32
int sectionsOffset = GetPhysicalSectionSize(shSize) + 0x40;
List <KeyValuePair <int, Elf32_Shdr> > shList = new List <KeyValuePair <int, Elf32_Shdr> >();
List <KeyValuePair <int, Elf32_Shdr> > shNew = new List <KeyValuePair <int, Elf32_Shdr> >();
for (int i = 0; i < rpx.SectionHeader.Length; i++)
{
shList.Add(new KeyValuePair <int, Elf32_Shdr>(i, rpx.SectionHeader[i]));
}
shList.Sort((pair1, pair2) => Elf32_Shdr.CompareByOffset(pair1.Value, pair2.Value));
FileStream src = File.Open(source, FileMode.Open);
FileStream dest = File.Open(destination, FileMode.Create);
byte[] srcBytes = new byte[sectionsOffset];
src.Read(srcBytes, 0, srcBytes.Length);
dest.Write(srcBytes, 0, srcBytes.Length);
for (int i = 0; i < shList.Count; i++)
{
int key = shList[i].Key;
Elf32_Shdr shdr = new Elf32_Shdr(shList[i].Value);
if (shList[i].Value.sh_offset >= sectionsOffset)
{
int padding = 0;
if ((shList[i].Value.sh_type & (uint)SHT_RPL.FILEINFO) == (uint)SHT_RPL.FILEINFO ||
(shList[i].Value.sh_flags & (uint)SHF_RPL.ZLIB) == (uint)SHF_RPL.ZLIB)
{
shdr.sh_offset = (uint)dest.Position;
srcBytes = new byte[shList[i].Value.sh_size];
src.Position = shList[i].Value.sh_offset;
src.Read(srcBytes, 0, srcBytes.Length);
if ((shList[i].Value.sh_type & (uint)SHT_RPL.FILEINFO) == (uint)SHT_RPL.FILEINFO)
{
rpx.CRC[shList[i].Key] = Security.ComputeCRC32(srcBytes, 0, srcBytes.Length);
}
padding = GetPhysicalSectionSize(srcBytes.Length) - srcBytes.Length;
dest.Write(srcBytes, 0, srcBytes.Length);
}
else
{
shdr.sh_offset = (uint)dest.Position;
srcBytes = new byte[shList[i].Value.sh_size];
src.Position = shList[i].Value.sh_offset;
src.Read(srcBytes, 0, srcBytes.Length);
byte[] compressBytes = Compress(srcBytes);
rpx.CRC[shList[i].Key] = Security.ComputeCRC32(srcBytes, 0, srcBytes.Length);
if (compressBytes.Length < srcBytes.Length)
{
shdr.sh_flags |= (uint)SHF_RPL.ZLIB;
shdr.sh_size = (uint)compressBytes.Length;
padding = GetPhysicalSectionSize(compressBytes.Length) - compressBytes.Length;
dest.Write(compressBytes, 0, compressBytes.Length);
}
else
{
padding = GetPhysicalSectionSize(srcBytes.Length) - srcBytes.Length;
dest.Write(srcBytes, 0, srcBytes.Length);
}
}
byte[] paddingBytes = new byte[padding];
dest.Write(paddingBytes, 0, paddingBytes.Length);
}
shNew.Add(new KeyValuePair <int, Elf32_Shdr>(key, shdr));
}
src.Close();
dest.Position = 0x40;
shNew.Sort((pair1, pair2) => pair1.Key.CompareTo(pair2.Key));
for (int i = 0; i < shNew.Count; i++)
{
dest.Write(shNew[i].Value.ToArray(rpx.Header.e_ident[(byte)EI.DataEncoding]), 0, 0x28);
}
for (int i = 0; i < rpx.CRC.Length; i++)
{
dest.WriteByte((byte)(rpx.CRC[i] >> 24));
dest.WriteByte((byte)((rpx.CRC[i] >> 16) & 0xFF));
dest.WriteByte((byte)((rpx.CRC[i] >> 8) & 0xFF));
dest.WriteByte((byte)(rpx.CRC[i] & 0xFF));
}
dest.Close();
}
protected void Edit(string rom, string destination,
byte speed, byte players, byte soundVolume, byte romType,
short widthTv, short widthDrc, short heightTv, short heightDrc)
{
FileStream fs = File.Open(FileName, FileMode.Open);
byte[] rodata = new byte[SectionHeader[RodataSectionIndex].sh_size];
fs.Position = SectionHeader[RodataSectionIndex].sh_offset;
fs.Read(rodata, 0, rodata.Length);
byte[] textSection = new byte[SectionHeader[TextSectionIndex].sh_size];
fs.Position = SectionHeader[TextSectionIndex].sh_offset;
fs.Read(textSection, 0, textSection.Length);
fs.Close();
if (rom != null)
{
if ((SectionHeader[RodataSectionIndex].sh_flags & 0x08000000) == 0x08000000)//Section Header Flag RPL ZLIB
{
rodata = Decompress(rodata);
}
rodata = GetNewRodata(CRCsSum, rodata, rom, speed, players, soundVolume, romType);
CRC[RodataSectionIndex] = Cll.Security.ComputeCRC32(rodata, 0, rodata.Length);
if ((SectionHeader[RodataSectionIndex].sh_flags & 0x08000000) == 0x08000000)//Section Header Flag RPL ZLIB
{
rodata = Compress(rodata);
}
}
if ((SectionHeader[TextSectionIndex].sh_flags & 0x08000000) == 0x08000000)//Section Header Flag RPL ZLIB
{
textSection = Decompress(textSection);
}
int aspectRatioOffset = GetAspectRatioOffset(CRCsSum);
if (aspectRatioOffset != 0)
{
textSection[aspectRatioOffset] = (byte)(heightTv >> 8);
textSection[aspectRatioOffset + 0x01] = (byte)(heightTv & 0xFF);
textSection[aspectRatioOffset + 0x04] = (byte)(widthTv >> 8);
textSection[aspectRatioOffset + 0x05] = (byte)(widthTv & 0xFF);
textSection[aspectRatioOffset + 0x30] = (byte)(heightDrc >> 8);
textSection[aspectRatioOffset + 0x31] = (byte)(heightDrc & 0xFF);
textSection[aspectRatioOffset + 0x34] = (byte)(widthDrc >> 8);
textSection[aspectRatioOffset + 0x35] = (byte)(widthDrc & 0xFF);
}
CRC[TextSectionIndex] = Cll.Security.ComputeCRC32(textSection, 0, textSection.Length);
if ((SectionHeader[TextSectionIndex].sh_flags & 0x08000000) == 0x08000000)//Section Header Flag RPL ZLIB
{
textSection = Compress(textSection);
}
int shSize = Header.e_shnum * 0x2C; // 0x2C = Header.e_shentsize + 4 bytes of CRC32
int sectionsOffset = GetPhysicalSectionSize(shSize) + 0x40;
List <KeyValuePair <int, Elf32_Shdr> > shList = new List <KeyValuePair <int, Elf32_Shdr> >();
List <KeyValuePair <int, Elf32_Shdr> > shNew = new List <KeyValuePair <int, Elf32_Shdr> >();
for (int i = 0; i < SectionHeader.Length; i++)
{
shList.Add(new KeyValuePair <int, Elf32_Shdr>(i, SectionHeader[i]));
}
shList.Sort((pair1, pair2) => Elf32_Shdr.CompareByOffset(pair1.Value, pair2.Value));
FileStream src = File.Open(FileName, FileMode.Open);
FileStream dest = File.Open(destination, FileMode.Create);
byte[] srcBytes = new byte[sectionsOffset];
src.Read(srcBytes, 0, srcBytes.Length);
dest.Write(srcBytes, 0, srcBytes.Length);
for (int i = 0; i < shList.Count; i++)
{
int key = shList[i].Key;
Elf32_Shdr shdr = new Elf32_Shdr(shList[i].Value);
if (shList[i].Value.sh_offset >= sectionsOffset)
{
int padding = 0;
shdr.sh_offset = (uint)dest.Position;
if (shList[i].Value.sh_offset == SectionHeader[TextSectionIndex].sh_offset)
{
shdr.sh_size = (uint)textSection.Length;
padding = GetPhysicalSectionSize(textSection.Length) - textSection.Length;
dest.Write(textSection, 0, textSection.Length);
}
else if (shList[i].Value.sh_offset == SectionHeader[RodataSectionIndex].sh_offset)
{
shdr.sh_size = (uint)rodata.Length;
padding = GetPhysicalSectionSize(rodata.Length) - rodata.Length;
dest.Write(rodata, 0, rodata.Length);
}
else
{
srcBytes = new byte[shList[i].Value.sh_size];
src.Position = shList[i].Value.sh_offset;
src.Read(srcBytes, 0, srcBytes.Length);
padding = GetPhysicalSectionSize(srcBytes.Length) - srcBytes.Length;
dest.Write(srcBytes, 0, srcBytes.Length);
}
byte[] paddingBytes = new byte[padding];
dest.Write(paddingBytes, 0, paddingBytes.Length);
}
shNew.Add(new KeyValuePair <int, Elf32_Shdr>(key, shdr));
}
src.Close();
dest.Position = 0x40;
shNew.Sort((pair1, pair2) => pair1.Key.CompareTo(pair2.Key));
for (int i = 0; i < shNew.Count; i++)
{
dest.Write(shNew[i].Value.ToArray(), 0, 0x28);
}
for (int i = 0; i < CRC.Length; i++)
{
dest.WriteByte((byte)(CRC[i] >> 24));
dest.WriteByte((byte)((CRC[i] >> 16) & 0xFF));
dest.WriteByte((byte)((CRC[i] >> 8) & 0xFF));
dest.WriteByte((byte)(CRC[i] & 0xFF));
}
dest.Close();
}