public bool TryReadLine(out ProblemString problemString)
{
if (IsEmpty)
{
return(ReturnEmpty(out problemString));
}
if (_buffer.Count > 0)
{
return(ReturnFromBuffer(out problemString));
}
SpinWait.SpinUntil(() => Completion.IsCompleted || _buffer.Count > 0);
if (IsEmpty)
{
return(ReturnEmpty(out problemString));
}
if (_buffer.Count > 0)
{
return(ReturnFromBuffer(out problemString));
}
throw new Exception("Logic error");
}
public bool TryReadLine(out ProblemString problemString)
{
if (_buffer.Count > 0)
{
return(ReturnFromBuffer(out problemString));
}
else
{
if (EOF)
{
return(ReturnEmpty(out problemString));
}
Load();
return(_buffer.Count > 0
? ReturnFromBuffer(out problemString)
: ReturnEmpty(out problemString));
}
}
/// <summary>
/// Проверить, что файл отсортирован
/// </summary>
static Task CheckSort(CheckSortOptions options)
{
if (string.IsNullOrWhiteSpace(options.FileName))
{
throw new ArgumentException("Empty file name");
}
using var file = File.OpenText(options.FileName);
if (file.EndOfStream)
{
throw new ArgumentException("Empty file");
}
Console.WriteLine($"Check file is sort for file '{options.FileName}'");
long linesCount = 0L;
var prevLine = new ProblemString(file.ReadLine());
linesCount++;
while (!file.EndOfStream)
{
var line = new ProblemString(file.ReadLine());
linesCount++;
if (ProblemStringComparer.Default.Compare(prevLine, line) > 0)
{
Console.WriteLine("Wrong order found:");
Console.WriteLine($"[{linesCount - 1}] {prevLine.RawString}");
Console.WriteLine($"[{linesCount}] {line.RawString}");
break;
}
prevLine = line;
}
Console.WriteLine($"Check file is sort DONE, {linesCount} lines");
return(Task.CompletedTask);
}
/// <summary>
/// Чтение строк из файла;
/// Наверное стоило не допускать многопоточного чтения, но я не увидел особой разницы в сравнении с однопоточным чтением;
/// </summary>
void Load()
{
if (EOF)
{
return;
}
long readed = 0L;
while (readed < BufferSize)
{
var lineRaw = _chunk.ReadLine();
if (lineRaw == null)
{
_chunk.Dispose();
_chunk = null;
break;
}
var line = new ProblemString(lineRaw);
readed += Consts.GetLineSize(line.RawString);
_buffer.Enqueue(line);
}
}
bool ReturnEmpty(out ProblemString problemString)
{
problemString = ProblemString.Empty;
return(false);
}
bool ReturnFromBuffer(out ProblemString problemString)
{
_buffer.TryDequeue(out problemString);
return(true);
}