// u2 cbCFHeader; /* (optional) size of per-cabinet reserved area */
// u1 cbCFFolder; /* (optional) size of per-folder reserved area */
// u1 cbCFData; /* (optional) size of per-datablock reserved area */
// u1 abReserve[]; /* (optional) per-cabinet reserved area */
// u1 szCabinetPrev[]; /* (optional) name of previous cabinet file */
// u1 szDiskPrev[]; /* (optional) name of previous disk */
// u1 szCabinetNext[]; /* (optional) name of next cabinet file */
// u1 szDiskNext[]; /* (optional) name of next disk */
public static CFHEADER_OPTIONAL FromStream(FileStream stream, CFHEADER_FLAGS fixedHeaderFlags)
{
CFHEADER_OPTIONAL optionalHeader = new CFHEADER_OPTIONAL();
BinaryReader reader = new BinaryReader(stream);
// TODO: bounds checking
if ((fixedHeaderFlags & CFHEADER_FLAGS.RESERVE_PRESENT) == CFHEADER_FLAGS.RESERVE_PRESENT)
{
// cbCFHeader present
optionalHeader.cbCFHeader = reader.ReadUInt16();
// cbCFFolder present
optionalHeader.cbCFFolder = reader.ReadByte();
// cbCFData present
optionalHeader.cbCFData = reader.ReadByte();
// abReserve present
optionalHeader.abReserve = reader.ReadBytes(optionalHeader.cbCFHeader);
}
else
{
// cbCFHeader not present
optionalHeader.cbCFHeader = 0;
// cbCFFolder not present
optionalHeader.cbCFFolder = 0;
// cbCFData not present
optionalHeader.cbCFData = 0;
// abReserve not present
optionalHeader.abReserve = null;
}
if ((fixedHeaderFlags & CFHEADER_FLAGS.PREV_CABINET) == CFHEADER_FLAGS.PREV_CABINET)
{
// not needed for CE cabs so skip for now
throw new NotSupportedException("CFHEADER_FLAGS.PREV_CABINET FLAG NOT SUPPORTED");
}
else
{
optionalHeader.szCabinetPrev = null;
optionalHeader.szDiskPrev = null;
optionalHeader.szCabinetNext = null;
optionalHeader.szDiskNext = null;
}
if ((fixedHeaderFlags & CFHEADER_FLAGS.NEXT_CABINET) == CFHEADER_FLAGS.NEXT_CABINET)
{
// not needed for CE cabs so skip for now
throw new NotSupportedException("CFHEADER_FLAGS.NEXT_CABINET FLAG NOT SUPPORTED");
}
// move to next DWORD boundary (struct alignment)
// stream.Seek((4 - (stream.Position % 4)), SeekOrigin.Current);
return(optionalHeader);
}
CFHEADER_FIXED(
uint signature,
uint reserved1,
uint cbCabinet,
uint reserved2,
uint coffFiles,
uint reserved3,
byte versionMinor,
byte versionMajor,
ushort cFolders,
ushort cFiles,
CFHEADER_FLAGS flags,
ushort setID,
ushort iCabinet)
{
this.signature = this.reserved1 = this.cbCabinet =
this.reserved2 = this.coffFiles = this.reserved3 =
this.cFolders = this.cFiles = this.setID =
this.iCabinet = this.versionMinor = this.versionMajor = 0;
this.flags = CFHEADER_FLAGS.None;
}
