private bool addVMCode(int firstByte, List<byte> vmCode, int length)
{
BitInput Inp = new BitInput();
Inp.InitBitInput();
// memcpy(Inp.InBuf,Code,Min(BitInput::MAX_SIZE,CodeSize));
for (int i = 0; i < Math.Min(BitInput.MAX_SIZE, vmCode.Count); i++)
{
Inp.InBuf[i] = vmCode[i];
}
rarVM.init();
int FiltPos;
if ((firstByte & 0x80) != 0)
{
FiltPos = RarVM.ReadData(Inp);
if (FiltPos == 0)
{
initFilters();
}
else
{
FiltPos--;
}
}
else
FiltPos = lastFilter; // use the same filter as last time
if (FiltPos > filters.Count || FiltPos > oldFilterLengths.Count)
{
return (false);
}
lastFilter = FiltPos;
bool NewFilter = (FiltPos == filters.Count);
UnpackFilter StackFilter = new UnpackFilter(); // new filter for
// PrgStack
UnpackFilter Filter;
if (NewFilter)
// new filter code, never used before since VM reset
{
// too many different filters, corrupt archive
if (FiltPos > 1024)
{
return (false);
}
// Filters[Filters.Size()-1]=Filter=new UnpackFilter;
Filter = new UnpackFilter();
filters.Add(Filter);
StackFilter.ParentFilter = filters.Count - 1;
oldFilterLengths.Add(0);
Filter.ExecCount = 0;
}
// filter was used in the past
else
{
Filter = filters[FiltPos];
StackFilter.ParentFilter = FiltPos;
Filter.ExecCount = Filter.ExecCount + 1; // ->ExecCount++;
}
prgStack.Add(StackFilter);
StackFilter.ExecCount = Filter.ExecCount; // ->ExecCount;
int BlockStart = RarVM.ReadData(Inp);
if ((firstByte & 0x40) != 0)
{
BlockStart += 258;
}
StackFilter.BlockStart = ((BlockStart + unpPtr) & Compress.MAXWINMASK);
if ((firstByte & 0x20) != 0)
{
StackFilter.BlockLength = RarVM.ReadData(Inp);
}
else
{
StackFilter.BlockLength = FiltPos < oldFilterLengths.Count ? oldFilterLengths[FiltPos] : 0;
}
StackFilter.NextWindow = (wrPtr != unpPtr) && ((wrPtr - unpPtr) & Compress.MAXWINMASK) <= BlockStart;
// DebugLog("\nNextWindow: UnpPtr=%08x WrPtr=%08x
// BlockStart=%08x",UnpPtr,WrPtr,BlockStart);
oldFilterLengths[FiltPos] = StackFilter.BlockLength;
// memset(StackFilter->Prg.InitR,0,sizeof(StackFilter->Prg.InitR));
Utility.Fill(StackFilter.Program.InitR, 0);
StackFilter.Program.InitR[3] = RarVM.VM_GLOBALMEMADDR; // StackFilter->Prg.InitR[3]=VM_GLOBALMEMADDR;
StackFilter.Program.InitR[4] = StackFilter.BlockLength; // StackFilter->Prg.InitR[4]=StackFilter->BlockLength;
StackFilter.Program.InitR[5] = StackFilter.ExecCount; // StackFilter->Prg.InitR[5]=StackFilter->ExecCount;
if ((firstByte & 0x10) != 0)
// set registers to optional parameters
// if any
{
int InitMask = Utility.URShift(Inp.GetBits(), 9);
Inp.AddBits(7);
for (int I = 0; I < 7; I++)
{
if ((InitMask & (1 << I)) != 0)
{
// StackFilter->Prg.InitR[I]=RarVM::ReadData(Inp);
StackFilter.Program.InitR[I] = RarVM.ReadData(Inp);
}
}
}
if (NewFilter)
{
int VMCodeSize = RarVM.ReadData(Inp);
if (VMCodeSize >= 0x10000 || VMCodeSize == 0)
{
return (false);
}
byte[] VMCode = new byte[VMCodeSize];
for (int I = 0; I < VMCodeSize; I++)
{
if (Inp.Overflow(3))
{
return (false);
}
VMCode[I] = (byte)(Inp.GetBits() >> 8);
Inp.AddBits(8);
}
// VM.Prepare(&VMCode[0],VMCodeSize,&Filter->Prg);
rarVM.prepare(VMCode, VMCodeSize, Filter.Program);
}
StackFilter.Program.AltCommands = Filter.Program.Commands; // StackFilter->Prg.AltCmd=&Filter->Prg.Cmd[0];
StackFilter.Program.CommandCount = Filter.Program.CommandCount; // StackFilter->Prg.CmdCount=Filter->Prg.CmdCount;
int StaticDataSize = Filter.Program.StaticData.Count;
if (StaticDataSize > 0 && StaticDataSize < RarVM.VM_GLOBALMEMSIZE)
{
// read statically defined data contained in DB commands
// StackFilter->Prg.StaticData.Add(StaticDataSize);
StackFilter.Program.StaticData = Filter.Program.StaticData;
// memcpy(&StackFilter->Prg.StaticData[0],&Filter->Prg.StaticData[0],StaticDataSize);
}
if (StackFilter.Program.GlobalData.Count < RarVM.VM_FIXEDGLOBALSIZE)
{
// StackFilter->Prg.GlobalData.Reset();
// StackFilter->Prg.GlobalData.Add(VM_FIXEDGLOBALSIZE);
StackFilter.Program.GlobalData.Clear();
StackFilter.Program.GlobalData.SetSize(RarVM.VM_FIXEDGLOBALSIZE);
}
// byte *GlobalData=&StackFilter->Prg.GlobalData[0];
List<byte> globalData = StackFilter.Program.GlobalData;
for (int I = 0; I < 7; I++)
{
rarVM.SetLowEndianValue(globalData, I * 4, StackFilter.Program.InitR[I]);
}
// VM.SetLowEndianValue((uint
// *)&GlobalData[0x1c],StackFilter->BlockLength);
rarVM.SetLowEndianValue(globalData, 0x1c, StackFilter.BlockLength);
// VM.SetLowEndianValue((uint *)&GlobalData[0x20],0);
rarVM.SetLowEndianValue(globalData, 0x20, 0);
rarVM.SetLowEndianValue(globalData, 0x24, 0);
rarVM.SetLowEndianValue(globalData, 0x28, 0);
// VM.SetLowEndianValue((uint
// *)&GlobalData[0x2c],StackFilter->ExecCount);
rarVM.SetLowEndianValue(globalData, 0x2c, StackFilter.ExecCount);
// memset(&GlobalData[0x30],0,16);
for (int i = 0; i < 16; i++)
{
globalData[0x30 + i] = 0x0;
}
if ((firstByte & 8) != 0)
// put data block passed as parameter if any
{
if (Inp.Overflow(3))
{
return (false);
}
int DataSize = RarVM.ReadData(Inp);
if (DataSize > RarVM.VM_GLOBALMEMSIZE - RarVM.VM_FIXEDGLOBALSIZE)
{
return (false);
}
int CurSize = StackFilter.Program.GlobalData.Count;
if (CurSize < DataSize + RarVM.VM_FIXEDGLOBALSIZE)
{
// StackFilter->Prg.GlobalData.Add(DataSize+VM_FIXEDGLOBALSIZE-CurSize);
StackFilter.Program.GlobalData.SetSize(DataSize + RarVM.VM_FIXEDGLOBALSIZE - CurSize);
}
int offset = RarVM.VM_FIXEDGLOBALSIZE;
globalData = StackFilter.Program.GlobalData;
for (int I = 0; I < DataSize; I++)
{
if (Inp.Overflow(3))
{
return (false);
}
globalData[offset + I] = (byte)(Utility.URShift(Inp.GetBits(), 8));
Inp.AddBits(8);
}
}
return (true);
}
private bool addVMCode(int firstByte, List<byte> vmCode, int length)
{
int num;
int lastFilter;
UnpackFilter filter2;
int num5;
BitInput rarVM = new BitInput();
rarVM.InitBitInput();
for (num = 0; num < Math.Min(0x8000, vmCode.Count); num++)
{
rarVM.InBuf[num] = vmCode[num];
}
this.rarVM.init();
if ((firstByte & 0x80) != 0)
{
lastFilter = RarVM.ReadData(rarVM);
if (lastFilter == 0)
{
this.initFilters();
}
else
{
lastFilter--;
}
}
else
{
lastFilter = this.lastFilter;
}
if ((lastFilter > this.filters.Count) || (lastFilter > this.oldFilterLengths.Count))
{
return false;
}
this.lastFilter = lastFilter;
bool flag = lastFilter == this.filters.Count;
UnpackFilter item = new UnpackFilter();
if (flag)
{
if (lastFilter > 0x400)
{
return false;
}
filter2 = new UnpackFilter();
this.filters.Add(filter2);
item.ParentFilter = this.filters.Count - 1;
this.oldFilterLengths.Add(0);
filter2.ExecCount = 0;
}
else
{
filter2 = this.filters[lastFilter];
item.ParentFilter = lastFilter;
filter2.ExecCount++;
}
this.prgStack.Add(item);
item.ExecCount = filter2.ExecCount;
int num3 = RarVM.ReadData(rarVM);
if ((firstByte & 0x40) != 0)
{
num3 += 0x102;
}
item.BlockStart = (num3 + base.unpPtr) & Compress.MAXWINMASK;
if ((firstByte & 0x20) != 0)
{
item.BlockLength = RarVM.ReadData(rarVM);
}
else
{
item.BlockLength = (lastFilter < this.oldFilterLengths.Count) ? this.oldFilterLengths[lastFilter] : 0;
}
item.NextWindow = (base.wrPtr != base.unpPtr) && (((base.wrPtr - base.unpPtr) & Compress.MAXWINMASK) <= num3);
this.oldFilterLengths[lastFilter] = item.BlockLength;
Utility.Fill<int>(item.Program.InitR, 0);
item.Program.InitR[3] = 0x3c000;
item.Program.InitR[4] = item.BlockLength;
item.Program.InitR[5] = item.ExecCount;
if ((firstByte & 0x10) != 0)
{
int num4 = Utility.URShift(rarVM.GetBits(), 9);
rarVM.AddBits(7);
for (num5 = 0; num5 < 7; num5++)
{
if ((num4 & (((int) 1) << num5)) != 0)
{
item.Program.InitR[num5] = RarVM.ReadData(rarVM);
}
}
}
if (flag)
{
int codeSize = RarVM.ReadData(rarVM);
if ((codeSize >= 0x10000) || (codeSize == 0))
{
return false;
}
byte[] code = new byte[codeSize];
for (num5 = 0; num5 < codeSize; num5++)
{
if (rarVM.Overflow(3))
{
return false;
}
code[num5] = (byte) (rarVM.GetBits() >> 8);
rarVM.AddBits(8);
}
this.rarVM.prepare(code, codeSize, filter2.Program);
}
item.Program.AltCommands = filter2.Program.Commands;
item.Program.CommandCount = filter2.Program.CommandCount;
int count = filter2.Program.StaticData.Count;
if ((count > 0) && (count < 0x2000))
{
item.Program.StaticData = filter2.Program.StaticData;
}
if (item.Program.GlobalData.Count < 0x40)
{
item.Program.GlobalData.Clear();
Utility.SetSize(item.Program.GlobalData, 0x40);
}
List<byte> globalData = item.Program.GlobalData;
for (num5 = 0; num5 < 7; num5++)
{
this.rarVM.SetLowEndianValue(globalData, num5 * 4, item.Program.InitR[num5]);
}
this.rarVM.SetLowEndianValue(globalData, 0x1c, item.BlockLength);
this.rarVM.SetLowEndianValue(globalData, 0x20, 0);
this.rarVM.SetLowEndianValue(globalData, 0x24, 0);
this.rarVM.SetLowEndianValue(globalData, 40, 0);
this.rarVM.SetLowEndianValue(globalData, 0x2c, item.ExecCount);
for (num = 0; num < 0x10; num++)
{
globalData[0x30 + num] = 0;
}
if ((firstByte & 8) != 0)
{
if (rarVM.Overflow(3))
{
return false;
}
int num8 = RarVM.ReadData(rarVM);
if (num8 > 0x1fc0)
{
return false;
}
int num9 = item.Program.GlobalData.Count;
if (num9 < (num8 + 0x40))
{
Utility.SetSize(item.Program.GlobalData, (num8 + 0x40) - num9);
}
int num10 = 0x40;
globalData = item.Program.GlobalData;
for (num5 = 0; num5 < num8; num5++)
{
if (rarVM.Overflow(3))
{
return false;
}
globalData[num10 + num5] = (byte) Utility.URShift(rarVM.GetBits(), 8);
rarVM.AddBits(8);
}
}
return true;
}