/// <summary>
/// covers "Header" section in 7zFormat.txt (line 435~457)
/// </summary>
private void read_Header()
{
Console.WriteLine("[7z-parser] read Header");
Property_IDs flag = (Property_IDs)archive_file_reader.ReadByte();
//optional ArchiveProperties
if (flag == Property_IDs.kArchiveProperties)
{
_Archive_Properties = read_Archive_Properties();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
//optional AdditionalStreamsInfo
if (flag == Property_IDs.kAdditionalStreamsInfo)
{
_Additional_Streams_Info = read_Streams_info();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
//optional MainStreamsInfo
if (flag == Property_IDs.kMainStreamsInfo)
{
_Main_Streams_Info = read_Streams_info();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
//Check kEnd
assert(flag == Property_IDs.kEnd,
"Expected kEnd (0x00), but got 0x" + Util.Byte_to_hex_string((byte)flag) + "\n" +
"Stream position (decimal) = " + archive_file_reader.BaseStream.Position);
Console.WriteLine("[7z-parser] read Header complete");
}
/// <summary>
/// covers "Streams Info" section in 7zFormat.txt (line 341~358)
/// </summary>
private StreamsInfo read_Streams_info()
{
Console.WriteLine("[7z-parser] read Streams Info");
StreamsInfo streams_info = new StreamsInfo();
Property_IDs flag = (Property_IDs)archive_file_reader.ReadByte();
//handles optional PackInfo
if (flag == Property_IDs.kPackInfo)
{
streams_info.packInfo = read_Pack_Info();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
else
{
streams_info.packInfo = null;
}
//handles optional CodersInfo
if (flag == Property_IDs.kUnPackInfo)
{
streams_info.codersInfo = read_Coders_Info();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
else
{
streams_info.codersInfo = null;
}
//handles optional PackInfo
if (flag == Property_IDs.kSubStreamsInfo)
{
streams_info.subStreamsInfo = read_SubStreams_info();
flag = (Property_IDs)archive_file_reader.ReadByte();
}
else
{
streams_info.subStreamsInfo = null;
}
//Check kEnd
assert(flag == Property_IDs.kEnd,
"Expected kEnd (0x00), but got 0x" + Util.Byte_to_hex_string((byte)flag) + "\n" +
"Stream position (decimal) = " + archive_file_reader.BaseStream.Position);
Console.WriteLine("[7z-parser] read Header complete");
return(streams_info);
}