// 'file_source' should be an open new instance of the file source
public BLIData(Main main, IFileSource file_source, long filepos_ = 0, long fileend_ = long.MaxValue, bool reload_ = false, int build_issue_ = 0)
{
build_issue = build_issue_;
// Use a fixed file end so that additions to the file don't muck this
// build up. Reducing the file size during this will probably cause an
// exception but oh well...
file = file_source.NewInstance().Open();
fileend = Math.Min(file.Stream.Length, fileend_);
filepos = Math_.Clamp(filepos_, 0, fileend);
filepos_line_index = LineIndex(main.m_line_index, filepos);
max_line_length = main.Settings.MaxLineLength;
file_buffer_size = main.m_bufsize;
line_cache_count = main.m_line_cache_count;
line_index_count = main.m_line_index.Count;
ignore_blanks = main.Settings.IgnoreBlankLines;
// We have to reload if 'filepos' moves outside the current cached range because
// we don't know how many lines there are between the new 'filepos' and the nearest
// edge of the cached data.
reload = reload_ || !filepos_line_index.Within(0, line_cache_count);
// Find the byte range of the file currently loaded
cached_whole_line_range = main.LineStartIndexRange;
// Get a copy of the filters to apply
filters = new List <IFilter>();
filters.AddRange(main.m_filters);
if (main.m_quick_filter_enabled)
{
filters.AddRange(main.m_highlights.ToList <IFilter>());
filters.Add(Filter.RejectAll); // Add a RejectAll so that non-highlighted means discard
}
// Get a copy of the transforms
transforms = main.m_transforms.ToList();
Debug.Assert(main.m_encoding != null);
Debug.Assert(main.m_row_delim != null);
bool certain, autodetect;
// If the settings say auto detect encoding, and this is a reload
// then detect the encoding, otherwise use what it is currently set to
certain = false;
autodetect = main.Settings.Encoding.Length == 0;
encoding = reload_ && autodetect
? GuessEncoding(file_source, out certain)
: (Encoding)main.m_encoding.Clone();
if (certain)
{
main.m_encoding = (Encoding)encoding.Clone();
}
// If the settings say auto detect the row delimiters, and this is a reload
// then detect them, otherwise use what is currently set
certain = false;
autodetect = main.Settings.RowDelimiter.Length == 0;
row_delim = reload_ && autodetect
? GuessRowDelimiter(file_source, encoding, main.Settings.MaxLineLength, out certain)
: (byte[])main.m_row_delim.Clone();
if (certain)
{
main.m_row_delim = (byte[])row_delim.Clone();
}
col_delim = (byte[])main.m_col_delim.Clone();
}