public static HeaderRec ReadFrom(BinaryReader r, int startByteIndex)
{
var rec = new HeaderRec
{
TableId = (BibleTableId) r.ReadByte(),
Flags = (HeaderFlags) r.ReadByte(),
Size = r.ReadInt32(),
CompressedSize = r.ReadInt32(),
StartByteIndex = startByteIndex
};
if(rec.CompressedSize < 0 || rec.Size < 0)
throw new BibleFormatException("Invalid size in header record.");
return rec;
}
private static void WriteRecord(BinaryWriter wr, ref HeaderRec rec)
{
wr.Write((byte) rec.TableId);
wr.Write((byte) rec.Flags);
wr.Write(rec.Size);
wr.Write(rec.CompressedSize);
}
public void File_with_invalid_header_record_should_throw()
{
var rec = new HeaderRec
{
TableId = BibleTableId.Books,
Flags = HeaderFlags.None,
Size = -5,
CompressedSize = 20,
StartByteIndex = 23
};
var wr = new BinaryWriter(new MemoryStream());
var rd = new BinaryReader(wr.BaseStream);
WriteAscii(wr, Header.ExpectedHeaderString);
WriteVersion(wr, ExpectedVersion);
wr.Write((byte)1);
WriteRecord(wr, ref rec);
wr.Seek(0, SeekOrigin.Begin);
Assert.Throws<BibleFormatException>(() => Header.ReadFrom(rd));
}
public void File_with_2_header_records_should_parse()
{
var rec1 = new HeaderRec
{
TableId = BibleTableId.Books,
Flags = HeaderFlags.None,
Size = 25,
CompressedSize = 20,
StartByteIndex = 33
};
var rec2 = new HeaderRec
{
TableId = BibleTableId.Verses,
Flags = HeaderFlags.None,
Size = 50,
CompressedSize = 50,
StartByteIndex = 53
};
var wr = new BinaryWriter(new MemoryStream());
var rd = new BinaryReader(wr.BaseStream);
WriteAscii(wr, Header.ExpectedHeaderString);
WriteVersion(wr, ExpectedVersion);
wr.Write((byte) 2);
WriteRecord(wr, ref rec1);
WriteRecord(wr, ref rec2);
wr.Seek(0, SeekOrigin.Begin);
var header = Header.ReadFrom(rd);
Assert.That(header.HeaderRecords[0], Is.EqualTo(rec1));
Assert.That(header.HeaderRecords[1], Is.EqualTo(rec2));
Assert.That(header.HeaderRecords.Count, Is.EqualTo(2));
}