static bool CheckForDoubleEscapedLiteralCharacter(char[] formatArray, int startPosition,
out string result, out string error)
{
error = "";
result = DateTimeParser.ForwardLookup(formatArray, startPosition, 2);
return(result == "''");
}
/// <summary>
/// Performs a forward lookup for the given forwardLookupIndex and checks the results against known
/// date time format parts. Returns true if part is found otherwise false.
/// </summary>
private static bool TryGetDateTimeFormatPart(char[] formatArray, int startPosition, char forwardLookupIndex,
Dictionary <char, List <int> > dateTimeFormatForwardLookups,
Dictionary <string, List <IDateTimeFormatPartOptionTO> > dateTimeFormatPartOptions, out string result,
out string error)
{
bool nothingDied = true;
error = "";
result = "";
List <int> lookupLengths;
if (dateTimeFormatForwardLookups.TryGetValue(forwardLookupIndex, out lookupLengths))
{
//
// Perform all forward lookups
//
List <string> lookupResults =
lookupLengths.Select(i => DateTimeParser.ForwardLookup(formatArray, startPosition, i)).ToList();
int count = 0;
while (count < lookupResults.Count && nothingDied)
{
//
// Check if forward lookup result is a known date time format part
//
List <IDateTimeFormatPartOptionTO> tmp;
if (dateTimeFormatPartOptions.TryGetValue(lookupResults[count], out tmp))
{
result = lookupResults[count];
count = lookupResults.Count;
}
else if (count == lookupLengths.Count - 1)
{
nothingDied = false;
error =
string.Concat("Failed to find any format part matches in forward lookups from character '",
forwardLookupIndex, "' at index ", startPosition, " of format.");
}
count++;
}
}
else
{
nothingDied = false;
error = string.Format(ErrorResource.UnexpectedCharacterAtIndex, startPosition);
}
return(nothingDied);
}
static bool TryGetDateTimeFormatPart(char[] formatArray, int startPosition, char forwardLookupIndex,
Dictionary <char, List <int> > dateTimeFormatForwardLookups,
Dictionary <string, List <IDateTimeFormatPartOptionTO> > dateTimeFormatPartOptions, out string result,
out string error)
{
var nothingDied = true;
error = "";
result = "";
List <int> lookupLengths;
if (dateTimeFormatForwardLookups.TryGetValue(forwardLookupIndex, out lookupLengths))
{
var lookupResults =
lookupLengths.Select(i => DateTimeParser.ForwardLookup(formatArray, startPosition, i)).ToList();
var count = 0;
while (count < lookupResults.Count && nothingDied)
{
//
// Check if forward lookup result is a known date time format part
//
List <IDateTimeFormatPartOptionTO> tmp;
if (dateTimeFormatPartOptions.TryGetValue(lookupResults[count], out tmp))
{
result = lookupResults[count];
count = lookupResults.Count;
}
else
{
CheckLookupLengths(startPosition, forwardLookupIndex, lookupLengths, count, ref error, ref nothingDied);
}
count++;
}
}
else
{
nothingDied = false;
error = string.Format(ErrorResource.UnexpectedCharacterAtIndex, startPosition);
}
return(nothingDied);
}