public static async Task <BSA105Header> ReadHeader(Stream stream)
{
stream.Seek(0, SeekOrigin.Begin);
var headerBytes = new byte[BSA105Header.HeaderSize];
await stream.ReadAsync(headerBytes, 0, headerBytes.Length);
return(BSA105Header.Parse(headerBytes, 0));
}
public static async Task <List <string> > ReadFileNameBlock(Stream stream, BSA105Header headers)
{
stream.Seek(
(
BSA105Header.HeaderSize +
(BSA105FolderRecord.FolderRecordSize * headers.FolderCount) +
(FileRecord.ByteSize * headers.FileCount) +
(headers.TotalFolderNameLength + headers.FolderCount)
),
SeekOrigin.Begin
);
var blockBytes = new byte[headers.TotalFileNameLength];
await stream.ReadAsync(blockBytes, 0, blockBytes.Length);
var blockString = Encoding.UTF8.GetString(blockBytes);
return(blockString.Split('\0').ToList());
}
public static async Task <FileRecordBlock> ReadFileRecordBlock(Stream stream, BSA105Header header, BSA105FolderRecord folder)
{
stream.Seek(folder.FileRecordOffset - header.TotalFileNameLength, SeekOrigin.Begin);
var nameLength = stream.ReadByte();
var blockBytes = new byte[nameLength + 1 + (folder.FileCount * FileRecord.ByteSize)];
await stream.ReadAsync(blockBytes, 1, blockBytes.Length - 1);
blockBytes[0] = (byte)nameLength;
return(FileRecordBlock.Parse(blockBytes, 0, (int)folder.FileCount));
}
public static async Task <List <BSA105FolderRecord> > ReadFolderRecords(Stream stream, BSA105Header header)
{
stream.Seek(BSA105Header.HeaderSize, SeekOrigin.Begin);
var recordBytes = new byte[BSA105FolderRecord.FolderRecordSize * header.FolderCount];
var records = new List <BSA105FolderRecord>((int)header.FolderCount);
await stream.ReadAsync(recordBytes, 0, recordBytes.Length);
for (int i = 0; i < header.FolderCount; i++)
{
var record = BSA105FolderRecord.Parse(recordBytes, i * BSA105FolderRecord.FolderRecordSize);
records.Add(record);
}
return(records);
}