public static bool TryParseEscape(char *buffer, int length, out int charsProcessed)
{
var parser = new AnsiEscapeParser(buffer, buffer + length);
bool wasSuccessful;
try
{
wasSuccessful = parser.TryParseEscape();
}
catch (EndOfFileException)
{
charsProcessed = 0;
return(false);
}
if (!wasSuccessful)
{
charsProcessed = 0;
return(false);
}
charsProcessed = (int)(parser.Current - buffer) + 1;
return(true);
}
private unsafe bool TryIncrementColumn(
char *buffer,
int length,
out int charsProcessed,
out bool shouldSkip)
{
charsProcessed = 1;
shouldSkip = false;
if (length == 0)
{
return(true);
}
char c = *buffer;
if (c == '\r')
{
shouldSkip = true;
if (length == 1 || buffer[1] != '\n')
{
return(true);
}
charsProcessed = 2;
return(false);
}
if (c == '\n')
{
shouldSkip = true;
return(false);
}
if (c == '\x1b')
{
if (AnsiEscapeParser.TryParseEscape(buffer, length, out charsProcessed))
{
return(true);
}
// If we couldn't parse the escape sequence then treat it like
// every other character.
charsProcessed = 1;
}
if (c == '\b')
{
if (_columns > 0)
{
_columns--;
}
return(true);
}
if (_columns - 1 == _width)
{
return(false);
}
_columns++;
return(true);
}
