internal static MatchData Create(
string input,
Regex regex,
Match match,
int maxCount = -1,
CancellationToken cancellationToken = default)
{
var groupDefinitions = new GroupDefinitionCollection(regex);
var items = new List <MatchItem>();
int max = (maxCount < 0) ? int.MaxValue : maxCount;
while (match.Success &&
items.Count < max)
{
cancellationToken.ThrowIfCancellationRequested();
var item = new MatchItem(match, groupDefinitions);
items.Add(item);
match = match.NextMatch();
}
return(new MatchData(regex, input, maxCount, new MatchItemCollection(items), groupDefinitions));
}
private SplitData(Regex regex, string input, int maxCount, SplitItemCollection items, bool omitGroups, GroupDefinitionCollection groupDefinitions)
{
Regex = regex;
Input = input;
MaxCount = maxCount;
GroupDefinitions = groupDefinitions;
OmitGroups = omitGroups;
Items = items;
}
private MatchData(
Regex regex,
string input,
int maxCount,
MatchItemCollection items,
GroupDefinitionCollection groupDefinitions)
{
Regex = regex;
Input = input;
MaxCount = maxCount;
Items = items;
GroupDefinitions = groupDefinitions;
}
internal MatchItem(Match match, GroupDefinitionCollection groups)
{
Match = match;
var items = new List <GroupItem>(groups.Count);
foreach (GroupDefinition group in groups)
{
items.Add(new GroupItem(Match.Groups[group.Number], group, this));
}
GroupItems = new GroupItemCollection(items);
}
public static SplitData Create(
Regex regex,
string input,
int count = 0,
bool omitGroups = false,
CancellationToken cancellationToken = default)
{
if (regex == null)
{
throw new ArgumentNullException(nameof(regex));
}
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
var groupDefinitions = new GroupDefinitionCollection(regex);
List <SplitItem> items = GetItems(regex, input, count, groupDefinitions, omitGroups, cancellationToken);
#if DEBUG
List <SplitItem> items2 = GetItems(regex, input, count, groupDefinitions, omitGroups: false, cancellationToken);
string[] splits = regex.Split(input, count);
Debug.Assert(splits.Length == items2.Count, items2.Count.ToString() + " " + splits.Length.ToString());
for (int i = 0; i < items2.Count; i++)
{
if (items2[i].Value != splits[i])
{
Debug.WriteLine(i);
Debug.WriteLine(splits[i]);
Debug.WriteLine(items2[i].Value);
Debug.Fail("");
}
}
#endif
return(new SplitData(regex, input, count, new SplitItemCollection(items), omitGroups, groupDefinitions));
}
private static List <SplitItem> GetItems(Regex regex, string input, int maxCount, GroupDefinitionCollection groupDefinitions, bool omitGroups, CancellationToken cancellationToken)
{
var splits = new List <SplitItem>();
if (maxCount == 1)
{
splits.Add(SplitItem.Create(input));
return(splits);
}
Match firstMatch = regex.Match(input);
if (!firstMatch.Success)
{
splits.Add(SplitItem.Create(input));
return(splits);
}
int prevIndex = 0;
int count = 0;
int splitNumber = 1;
foreach (Match match in EnumerateMatches(regex, firstMatch, maxCount, cancellationToken))
{
splits.Add(SplitItem.Create(input.Substring(prevIndex, match.Index - prevIndex), prevIndex, splitNumber));
count++;
splitNumber++;
prevIndex = match.Index + match.Length;
if (!omitGroups)
{
if (regex.RightToLeft)
{
for (int i = (groupDefinitions.Count - 1); i >= 0; i--)
{
if (groupDefinitions[i].Number != 0)
{
Group group = match.Groups[groupDefinitions[i].Number];
if (group.Success)
{
splits.Add(SplitItem.Create(group, groupDefinitions[i]));
count++;
}
}
}
}
else
{
foreach (GroupDefinition groupDefinition in groupDefinitions)
{
if (groupDefinition.Number != 0)
{
Group group = match.Groups[groupDefinition.Number];
if (group.Success)
{
splits.Add(SplitItem.Create(group, groupDefinition));
count++;
}
}
}
}
}
}
splits.Add(SplitItem.Create(input.Substring(prevIndex, input.Length - prevIndex), prevIndex, splitNumber));
return(splits);
}