private void ReadVer2Info()
{
if (m_IntVersion != 0x200)
{
throw new GrfException();
}
byte[] buf = new byte[8], zbuf;
int len, len2;
FileStream.Read(buf, 0, 8);
len = EndianConverter.LittleEndian(BitConverter.ToInt32(buf, 0));
if (0 == (len2 = EndianConverter.LittleEndian(BitConverter.ToInt32(buf, 4))))
{
return;
}
zbuf = new byte[len];
FileStream.Read(zbuf, 0, len);
using (IntPtrEx pBuffer = new IntPtrEx(ZlibStream.UncompressBuffer(zbuf)))
{
string name = null;
GrfItem item;
try
{
for (int i = 0, offset = 0; i < m_Items.Capacity; i++, offset += 0x11)
{
name = pBuffer.Read <string>(offset);
len = name.Length + 1;
if (len >= GRF_NAMELEN)
{
throw new GrfException();
}
offset += len;
item = GrfItem.CreateV2
(
this,
name,
EndianConverter.LittleEndian(pBuffer.Read <int>(offset)),
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 4)),
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 8)),
(GrfFileFlags)pBuffer[offset + 0xC],
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 0xD)) + GRF_HEADER_FULL_LEN
);
m_Items.GrfAdd(item);
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}
private void ReadVer1Info()
{
if (m_IntVersion > 0x103)
{
throw new GrfException();
}
int offset = (int)FileStream.Position;
int len2, len = (int)FileStream.Length - offset;
byte[] buffer = new byte[len], namebuf = new byte[GRF_NAMELEN];
try
{
FileStream.Read(buffer, 0, len);
string name = null;
GrfItem item;
using (IntPtrEx pBuffer = new IntPtrEx(buffer))
{
for (int i = offset = 0; i < m_Items.Capacity; i++)
{
len = EndianConverter.LittleEndian(pBuffer.Read <int>(offset));
offset += 4;
if (m_IntVersion < 0x101)
{
len2 = pBuffer.Read <string>(offset).Length;
if (len2 >= GRF_NAMELEN)
{
throw new GrfException();
}
name = SwapNibbles(pBuffer + offset, len2);
}
else if (m_IntVersion < 0x104)
{
offset += 2;
len2 = len - 6;
if (len2 >= GRF_NAMELEN)
{
throw new GrfException();
}
SwapNibbles(namebuf, pBuffer + offset, len2);
name = GrfCrypt.DecryptNameVer1(namebuf, len2);
len -= 2;
}
offset += len;
item = GrfItem.CreateV1
(
this,
name,
EndianConverter.LittleEndian(pBuffer.Read <int>(offset)) - EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 8)) - 0x02CB,
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 4)) - 0x92CB,
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 8)),
(GrfFileFlags)pBuffer[offset + 0xC],
EndianConverter.LittleEndian(pBuffer.Read <int>(offset + 0xD)) + GRF_HEADER_FULL_LEN
);
m_Items.GrfAdd(item);
offset += 0x11;
}
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
private void ReadHeader()
{
if (FileStream.CanWrite && FileStream.Length < 1)
{
byte[] zbuf = ZlibStream.CompressBuffer(new byte[0]);
byte[] zero = new byte[4];
int zlen_le = EndianConverter.LittleEndian(zbuf.Length),
zero_fcount = EndianConverter.LittleEndian(7),
create_ver = EndianConverter.LittleEndian(m_IntVersion);
FileStream.Write(Encoding.ASCII.GetBytes(GRF_HEADER), 0, GRF_HEADER_LEN);
FileStream.Write(CryptWatermark, 0, CryptWatermark.Length);
FileStream.Write(zero, 0, 4);
FileStream.Write(zero, 0, 4);
FileStream.Write(BitConverter.GetBytes(zero_fcount), 0, 4);
FileStream.Write(BitConverter.GetBytes(create_ver), 0, 4);
FileStream.Write(BitConverter.GetBytes(zlen_le), 0, 4);
FileStream.Write(zero, 0, 4);
FileStream.Write(zbuf, 0, zbuf.Length);
FileStream.Seek(0, SeekOrigin.Begin);
}
byte[] buf = new byte[GRF_HEADER_FULL_LEN];
FileStream.Read(buf, 0, buf.Length);
if (buf[GRF_HEADER_LEN + 1] == 1)
{
m_AllowCrypt = true;
// 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
for (byte i = 0; i < 0xF; i++)
{
if (buf[GRF_HEADER_LEN + i] != i)
{
throw new GrfException();
}
}
}
else if (buf[GRF_HEADER_LEN] == 0)
{
m_AllowCrypt = false;
// 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
for (byte i = 0; i < 0xF; i++)
{
if (buf[GRF_HEADER_LEN + i] != 0)
{
throw new GrfException();
}
}
}
else
{
throw new GrfException();
}
using (IntPtrEx pBuffer = new IntPtrEx(buf))
{
m_Items = new GrfItemCollection(this);
m_IntVersion = EndianConverter.LittleEndian(pBuffer.Read <int>(GRF_HEADER_MID_LEN + 0xC));
m_Items.Capacity = EndianConverter.LittleEndian(pBuffer.Read <int>(GRF_HEADER_MID_LEN + 8))
- EndianConverter.LittleEndian(pBuffer.Read <int>(GRF_HEADER_MID_LEN + 4))
- 7;
FileStream.Seek(EndianConverter.LittleEndian(pBuffer.Read <int>(GRF_HEADER_MID_LEN) + GRF_HEADER_FULL_LEN), SeekOrigin.Begin);
}
switch (m_IntVersion & 0xFF00)
{
case 0x0200: ReadVer2Info(); break;
case 0x0100: ReadVer1Info(); break;
default: throw new GrfException();
}
}
private void ReadVer2Info()
{
if (m_IntVersion != 0x200)
throw new GrfException();
byte[] buf = new byte[8], zbuf;
int len, len2;
FileStream.Read(buf, 0, 8);
len = EndianConverter.LittleEndian(BitConverter.ToInt32(buf, 0));
if (0 == (len2 = EndianConverter.LittleEndian(BitConverter.ToInt32(buf, 4))))
return;
zbuf = new byte[len];
FileStream.Read(zbuf, 0, len);
using (IntPtrEx pBuffer = new IntPtrEx(ZlibStream.UncompressBuffer(zbuf)))
{
string name = null;
GrfItem item;
try
{
for (int i = 0, offset = 0; i < m_Items.Capacity; i++, offset += 0x11)
{
name = pBuffer.Read<string>(offset);
len = name.Length + 1;
if (len >= GRF_NAMELEN)
throw new GrfException();
offset += len;
item = GrfItem.CreateV2
(
this,
name,
EndianConverter.LittleEndian(pBuffer.Read<int>(offset)),
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 4)),
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 8)),
(GrfFileFlags)pBuffer[offset + 0xC],
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 0xD)) + GRF_HEADER_FULL_LEN
);
m_Items.GrfAdd(item);
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}
private void ReadVer1Info()
{
if (m_IntVersion > 0x103)
throw new GrfException();
int offset = (int)FileStream.Position;
int len2, len = (int)FileStream.Length - offset;
byte[] buffer = new byte[len], namebuf = new byte[GRF_NAMELEN];
try
{
FileStream.Read(buffer, 0, len);
string name = null;
GrfItem item;
using (IntPtrEx pBuffer = new IntPtrEx(buffer))
{
for (int i = offset = 0; i < m_Items.Capacity; i++)
{
len = EndianConverter.LittleEndian(pBuffer.Read<int>(offset));
offset += 4;
if (m_IntVersion < 0x101)
{
len2 = pBuffer.Read<string>(offset).Length;
if (len2 >= GRF_NAMELEN)
throw new GrfException();
name = SwapNibbles(pBuffer + offset, len2);
}
else if (m_IntVersion < 0x104)
{
offset += 2;
len2 = len - 6;
if (len2 >= GRF_NAMELEN)
throw new GrfException();
SwapNibbles(namebuf, pBuffer + offset, len2);
name = GrfCrypt.DecryptNameVer1(namebuf, len2);
len -= 2;
}
offset += len;
item = GrfItem.CreateV1
(
this,
name,
EndianConverter.LittleEndian(pBuffer.Read<int>(offset)) - EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 8)) - 0x02CB,
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 4)) - 0x92CB,
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 8)),
(GrfFileFlags)pBuffer[offset + 0xC],
EndianConverter.LittleEndian(pBuffer.Read<int>(offset + 0xD)) + GRF_HEADER_FULL_LEN
);
m_Items.GrfAdd(item);
offset += 0x11;
}
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
private void ReadHeader()
{
if (FileStream.CanWrite && FileStream.Length < 1)
{
byte[] zbuf = ZlibStream.CompressBuffer(new byte[0]);
byte[] zero = new byte[4];
int zlen_le = EndianConverter.LittleEndian(zbuf.Length),
zero_fcount = EndianConverter.LittleEndian(7),
create_ver = EndianConverter.LittleEndian(m_IntVersion);
FileStream.Write(Encoding.ASCII.GetBytes(GRF_HEADER), 0, GRF_HEADER_LEN);
FileStream.Write(CryptWatermark, 0, CryptWatermark.Length);
FileStream.Write(zero, 0, 4);
FileStream.Write(zero, 0, 4);
FileStream.Write(BitConverter.GetBytes(zero_fcount), 0, 4);
FileStream.Write(BitConverter.GetBytes(create_ver), 0, 4);
FileStream.Write(BitConverter.GetBytes(zlen_le), 0, 4);
FileStream.Write(zero, 0, 4);
FileStream.Write(zbuf, 0, zbuf.Length);
FileStream.Seek(0, SeekOrigin.Begin);
}
byte[] buf = new byte[GRF_HEADER_FULL_LEN];
FileStream.Read(buf, 0, buf.Length);
if (buf[GRF_HEADER_LEN + 1] == 1)
{
m_AllowCrypt = true;
// 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
for (byte i = 0; i < 0xF; i++)
if (buf[GRF_HEADER_LEN + i] != i)
throw new GrfException();
}
else if (buf[GRF_HEADER_LEN] == 0)
{
m_AllowCrypt = false;
// 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
for (byte i = 0; i < 0xF; i++)
if (buf[GRF_HEADER_LEN + i] != 0)
throw new GrfException();
}
else
{
throw new GrfException();
}
using (IntPtrEx pBuffer = new IntPtrEx(buf))
{
m_Items = new GrfItemCollection(this);
m_IntVersion = EndianConverter.LittleEndian(pBuffer.Read<int>(GRF_HEADER_MID_LEN + 0xC));
m_Items.Capacity = EndianConverter.LittleEndian(pBuffer.Read<int>(GRF_HEADER_MID_LEN + 8))
- EndianConverter.LittleEndian(pBuffer.Read<int>(GRF_HEADER_MID_LEN + 4))
- 7;
FileStream.Seek(EndianConverter.LittleEndian(pBuffer.Read<int>(GRF_HEADER_MID_LEN) + GRF_HEADER_FULL_LEN), SeekOrigin.Begin);
}
switch (m_IntVersion & 0xFF00)
{
case 0x0200: ReadVer2Info(); break;
case 0x0100: ReadVer1Info(); break;
default: throw new GrfException();
}
}