public override byte SI_READ()
{
if (inputBufferPosition >= inputBufferSize)
{
if (inputFile.Position == inputFile.Length)
{
SI_BREAK = true;
return(Byte.MaxValue);
}
else
{
if (inputBufferSize > inputFile.Length - inputFile.Position)
{
inputBufferSize = (int)(inputFile.Length - inputFile.Position);
}
inputFile.Read(inputBuffer, 0, inputBufferSize);
inputBufferPosition = 0;
}
}
byte result = inputBuffer[inputBufferPosition];
InputSize++;
inputBufferPosition++;
return(result);
}
/// <summary>
/// Attempt to extract a Wise installer
/// </summary>
/// <param name="file">Possible Wise installer</param>
/// <param name="outputPath">Output directory for extracted files</param>
public bool ExtractTo(string file, string outputPath)
{
file = Path.GetFullPath(file);
outputPath = Path.GetFullPath(outputPath);
Directory.CreateDirectory(outputPath);
if (!Open(file))
{
return(false);
}
// Move to data and determine if this is a known format
JumpToTheData();
inputFile.Seek(dataBase + currentFormat.ExecutableOffset);
for (int i = 0; i < knownFormats.Length; i++)
{
if (currentFormat.Equals(knownFormats[i]))
{
currentFormat = knownFormats[i];
break;
}
}
// Fall back on heuristics if we couldn't match
if (currentFormat.ArchiveEnd == 0)
{
inputFile.Seek(0);
Approximate();
if (!pkzip)
{
if (FindReal(outputPath))
{
ExtractFiles(outputPath);
RenameFiles(outputPath);
Close();
return(true);
}
}
else
{
offsetReal = offsetApproximate;
ExtractFiles(outputPath);
RenameFiles(outputPath);
Close();
return(true);
}
Close();
return(false);
}
// Skip over the addditional DLL name, if we expect it
long dataStart = currentFormat.ExecutableOffset;
if (currentFormat.Dll)
{
byte[] dll = new byte[256];
inputFile.Read(dll, 0, 1);
dataStart++;
if (dll[0] != 0x00)
{
inputFile.Read(dll, 1, dll[0]);
dataStart += dll[0];
int dllLength = inputFile.ReadInt32();
dataStart += 4;
}
}
// Check if flags are consistent
if (!currentFormat.NoCrc)
{
int flags = inputFile.ReadInt32();
if ((flags & 0x0100) != 0)
{
return(false);
}
}
if (currentFormat.ArchiveEnd > 0)
{
inputFile.Seek(dataBase + dataStart + currentFormat.ArchiveEnd);
int archiveEndLoaded = inputFile.ReadInt32();
if (archiveEndLoaded != 0)
{
currentFormat.ArchiveEnd = archiveEndLoaded + dataBase;
}
}
inputFile.Seek(dataBase + dataStart + currentFormat.ArchiveStart);
// Skip over the initialization text, if we expect it
if (currentFormat.InitText)
{
byte[] waitingBytes = new byte[256];
inputFile.Read(waitingBytes, 0, 1);
inputFile.Read(waitingBytes, 1, waitingBytes[0]);
}
offsetReal = inputFile.Position;
ExtractFiles(outputPath);
RenameFiles(outputPath);
Close();
return(true);
}
