public static int ParseValueReadings(FileReadContainer fileReadContainer, int columnIndex, string timeSpan)
{
int count = 0;
DateTime?first = null;
for (int i = fileReadContainer.CurrentLineCount; i > 0; i--)
{
if (fileReadContainer.Values[count] == null)
{
fileReadContainer.Values[count] = new ValueReadingDto();
}
if (StringParser.TryParseLine(fileReadContainer.Lines[i - 1].Chars, columnIndex, fileReadContainer.Values[count]))
{
DateTime dt = DateTime.Parse(fileReadContainer.Values[count].DateTime);
if (!first.HasValue)
{
first = dt;
}
if (!TimePeriods.IsDateWithinBoundry(dt, first.Value, timeSpan))
{
break;
}
count++;
}
}
return(count);
}
private static void ReadLine(StreamReader reader, FileReadContainer fileReadContainer)
{
if (fileReadContainer.Lines[fileReadContainer.CurrentLineCount] == null)
{
fileReadContainer.Lines[fileReadContainer.CurrentLineCount] = new TextLine(fileReadContainer.ConstantLineLength);
}
int charIndex = 0;
char ch = '\0';
do
{
ch = (char)reader.Read();
if (charIndex >= fileReadContainer.Lines[fileReadContainer.CurrentLineCount].Chars.Length)
{
throw new Exception("Trying to read more chars than allocated by graph_line_length");
}
fileReadContainer.Lines[fileReadContainer.CurrentLineCount].Chars[charIndex++] = ch;
} while (ch != NEWLINE);
}
private bool ReadAllLines(string filePath, FileReadContainer fileReadContainer)
{
try {
using (var reader = new StreamReader(filePath)) {
while (!reader.EndOfStream)
{
ReadLine(reader, fileReadContainer);
fileReadContainer.CurrentLineCount++;
if (fileReadContainer.CurrentLineCount >= fileReadContainer.Lines.Length)
{
throw new Exception($"Trying to read more lines than allocated by graph_line_count for {filePath}.");
}
}
reader.Close();
return(true);
}
} catch (Exception ex) {
Console.WriteLine(ex);
}
return(false);
}
private static async Task <bool> ReadAllLinesToFileReadContainerAsync(string filePath, FileReadContainer fileReadContainer)
{
using var sourceStream =
new FileStream(
filePath,
FileMode.Open, FileAccess.Read, FileShare.Read,
bufferSize: 4096, useAsync: true);
byte[] buffer = new byte[0x1000];
int numRead;
int currentCharPos = 0;
while ((numRead = await sourceStream.ReadAsync(buffer, 0, buffer.Length)) != 0)
{
for (int i = 0; i < numRead; i++)
{
char ch = Convert.ToChar(buffer[i]);
if (fileReadContainer.Lines[fileReadContainer.CurrentLineCount] == null)
{
fileReadContainer.Lines[fileReadContainer.CurrentLineCount] = new TextLine(fileReadContainer.ConstantLineLength);
}
fileReadContainer.Lines[fileReadContainer.CurrentLineCount].Chars[currentCharPos++] = ch;
if (currentCharPos >= fileReadContainer.Lines[fileReadContainer.CurrentLineCount].Chars.Length)
{
throw new Exception("Trying to read more chars than allocated by graph_line_length");
}
if (ch == '\n')
{
fileReadContainer.CurrentLineCount++;
currentCharPos = 0;
}
}
}
return(true);
}
public Task <bool> ReadAllLinesAsync(string filePath, FileReadContainer fileReadContainer)
{
return(ReadAllLinesToFileReadContainerAsync(filePath, fileReadContainer));
}