public static unsafe byte[] WriteFATDef(FatDef def)
{
var bytes = new byte[32];
fixed(byte *ptr = bytes)
{
*(FatDef *)ptr = def;
}
return(bytes);
}
public static unsafe FatDef ReadFATDef(byte[] bytes)
{
FatDef result = new FatDef();
fixed(byte *ptr = bytes)
{
result = *(FatDef *)ptr;
}
return(result);
}
public static byte[] MakeVMSExtraBlock(RecordTypes recordType, RecordLayouts layout, FileAttributes attributes,
ushort recordSize, uint fileSize, byte bucketSize, ushort maxRecordSize, ushort defaultExtend,
DateTime created,
DateTime modified, uint ownerId, FileProtection system, FileProtection owner, FileProtection group,
FileProtection world)
{
var headerResult = new PK_header
{
tag = VMSAttributeHeader, size = VMSAttributeSize, data = new List <PK_field>()
};
var evenFileSize = Math.DivRem(fileSize, 512, out var fileSizeRemainder) + 1;
FatDef fatDef = new FatDef
{
b_rtype = MakeRecordType(recordType, layout),
b_rattrib = (byte)attributes,
w_rsize = recordSize,
l_hiblk = (uint)(((evenFileSize + 1) << 16) | ((evenFileSize + 1) >> 16)),
l_efblk = (uint)((evenFileSize << 16) | (evenFileSize >> 16)),
w_ffbyte = (ushort)fileSizeRemainder,
b_bktsize = bucketSize,
b_vfcsize = (byte)(recordType == RecordTypes.C_VFC ? 2 : 0),
w_maxrec = maxRecordSize,
w_defext = defaultExtend,
w_gbc = 0
};
headerResult.data.Add(new PK_field {
size = 32, tag = 4, value = WriteFATDef(fatDef)
});
headerResult.data.Add(new PK_field {
size = 4, tag = 3, value = BitConverter.GetBytes((int)0)
});
headerResult.data.Add(new PK_field {
size = 8, tag = 17, value = ConvertToSmithsonianTime(created)
});
headerResult.data.Add(new PK_field {
size = 8, tag = 18, value = ConvertToSmithsonianTime(modified)
});
headerResult.data.Add(new PK_field {
size = 8, tag = 19, value = BitConverter.GetBytes((long)0)
});
headerResult.data.Add(new PK_field {
size = 8, tag = 20, value = BitConverter.GetBytes((long)0)
});
headerResult.data.Add(new PK_field {
size = 2, tag = 13, value = new byte[] { 1, 0 }
});
headerResult.data.Add(new PK_field {
size = 4, tag = 21, value = BitConverter.GetBytes(ownerId)
});
headerResult.data.Add(
new PK_field {
size = 2, tag = 22, value = MakeProtection(system, owner, group, world)
});
headerResult.data.Add(new PK_field {
size = 2, tag = 23, value = new byte[] { 0, 0 }
});
headerResult.data.Add(new PK_field {
size = 1, tag = 29, value = new byte[] { 0 }
});
return(WriteHeader(headerResult));
}