private string GetWhiteSpaceFromCurrentContext(ParserRuleContext context)
{
int a = context.Start.StartIndex;
int b = context.Stop.StopIndex;
a.Interval interval = new a.Interval(a, b);
_charStream = context.Start.InputStream;
return(_charStream.GetText(interval));
}
private string GetWhitespaceStringFromTokenInterval(a.Interval interval)
{
try
{
var start = TokenStream.Get(interval.a).StartIndex;
var end = TokenStream.Get(interval.b).StopIndex;
a.Interval i = new a.Interval(start, end);
return(_charStream.GetText(i));
}
catch
{
return(string.Empty);
}
}
public virtual string GetText(Interval interval)
{
if (interval.a < 0 || interval.b < interval.a - 1)
{
throw new ArgumentException("invalid interval");
}
int bufferStartIndex = GetBufferStartIndex();
if (n > 0 && data[n - 1] == char.MaxValue)
{
if (interval.a + interval.Length > bufferStartIndex + n)
{
throw new ArgumentException("the interval extends past the end of the stream");
}
}
if (interval.a < bufferStartIndex || interval.b >= bufferStartIndex + n)
{
throw new NotSupportedException("interval " + interval + " outside buffer: " + bufferStartIndex
+ ".." + (bufferStartIndex + n - 1));
}
// convert from absolute to local index
int i = interval.a - bufferStartIndex;
return new string(data, i, interval.Length);
}
public virtual string GetText(Interval interval)
{
int bufferStartIndex = GetBufferStartIndex();
int bufferStopIndex = bufferStartIndex + tokens.Length - 1;
int start = interval.a;
int stop = interval.b;
if (start < bufferStartIndex || stop > bufferStopIndex)
{
throw new NotSupportedException("interval " + interval + " not in token buffer window: " + bufferStartIndex + ".." + bufferStopIndex);
}
int a = start - bufferStartIndex;
int b = stop - bufferStartIndex;
StringBuilder buf = new StringBuilder();
for (int i = a; i <= b; i++)
{
IToken t = tokens[i];
buf.Append(t.Text);
}
return buf.ToString();
}
public virtual string GetText(Interval interval)
{
int start = interval.a;
int stop = interval.b;
if (stop >= n)
{
stop = n - 1;
}
int count = stop - start + 1;
if (start >= n)
{
return string.Empty;
}
// System.err.println("data: "+Arrays.toString(data)+", n="+n+
// ", start="+start+
// ", stop="+stop);
return new string(data, start, count);
}
public virtual string GetText(Interval interval)
{
int start = interval.a;
int stop = interval.b;
if (stop >= n)
{
stop = n - 1;
}
int count = stop - start + 1;
if (start >= n)
{
return string.Empty;
}
return data.TextSegment(start, stop);
}
// copy on write so we can cache a..a intervals and sets of that
protected internal virtual void Add(Interval addition)
{
if (@readonly)
{
throw new InvalidOperationException("can't alter readonly IntervalSet");
}
//System.out.println("add "+addition+" to "+intervals.toString());
if (addition.b < addition.a)
{
return;
}
// find position in list
// Use iterators as we modify list in place
for (int i = 0; i < intervals.Count; i++)
{
Interval r = intervals[i];
if (addition.Equals(r))
{
return;
}
if (addition.Adjacent(r) || !addition.Disjoint(r))
{
// next to each other, make a single larger interval
Interval bigger = addition.Union(r);
intervals[i] = bigger;
// make sure we didn't just create an interval that
// should be merged with next interval in list
while (i < intervals.Count - 1)
{
i++;
Interval next = intervals[i];
if (!bigger.Adjacent(next) && bigger.Disjoint(next))
{
break;
}
// if we bump up against or overlap next, merge
intervals.RemoveAt(i);
// remove this one
i--;
// move backwards to what we just set
intervals[i] = bigger.Union(next);
// set to 3 merged ones
}
// first call to next after previous duplicates the result
return;
}
if (addition.StartsBeforeDisjoint(r))
{
// insert before r
intervals.Insert(i, addition);
return;
}
}
// if disjoint and after r, a future iteration will handle it
// ok, must be after last interval (and disjoint from last interval)
// just add it
intervals.Add(addition);
}
public String GetText(Interval interval)
{
return _source.GetText(interval);
}
public static Antlr4.Runtime.Misc.IntervalSet Subtract(Antlr4.Runtime.Misc.IntervalSet left, Antlr4.Runtime.Misc.IntervalSet right)
{
if (left == null || left.IsNil)
{
return new Antlr4.Runtime.Misc.IntervalSet();
}
Antlr4.Runtime.Misc.IntervalSet result = new Antlr4.Runtime.Misc.IntervalSet(left);
if (right == null || right.IsNil)
{
// right set has no elements; just return the copy of the current set
return result;
}
int resultI = 0;
int rightI = 0;
while (resultI < result.intervals.Count && rightI < right.intervals.Count)
{
Interval resultInterval = result.intervals[resultI];
Interval rightInterval = right.intervals[rightI];
// operation: (resultInterval - rightInterval) and update indexes
if (rightInterval.b < resultInterval.a)
{
rightI++;
continue;
}
if (rightInterval.a > resultInterval.b)
{
resultI++;
continue;
}
Interval? beforeCurrent = null;
Interval? afterCurrent = null;
if (rightInterval.a > resultInterval.a)
{
beforeCurrent = new Interval(resultInterval.a, rightInterval.a - 1);
}
if (rightInterval.b < resultInterval.b)
{
afterCurrent = new Interval(rightInterval.b + 1, resultInterval.b);
}
if (beforeCurrent != null)
{
if (afterCurrent != null)
{
// split the current interval into two
result.intervals[resultI] = beforeCurrent.Value;
result.intervals.Insert(resultI + 1, afterCurrent.Value);
resultI++;
rightI++;
continue;
}
else
{
// replace the current interval
result.intervals[resultI] = beforeCurrent.Value;
resultI++;
continue;
}
}
else
{
if (afterCurrent != null)
{
// replace the current interval
result.intervals[resultI] = afterCurrent.Value;
rightI++;
continue;
}
else
{
// remove the current interval (thus no need to increment resultI)
result.intervals.RemoveAt(resultI);
continue;
}
}
}
// If rightI reached right.intervals.size(), no more intervals to subtract from result.
// If resultI reached result.intervals.size(), we would be subtracting from an empty set.
// Either way, we are done.
return result;
}
public virtual string GetText(Interval interval)
{
int start = interval.a;
int stop = interval.b;
if (start < 0 || stop < 0)
{
return string.Empty;
}
LazyInit();
if (stop >= tokens.Count)
{
stop = tokens.Count - 1;
}
StringBuilder buf = new StringBuilder();
for (int i = start; i <= stop; i++)
{
IToken t = tokens[i];
if (t.Type == TokenConstants.EOF)
{
break;
}
buf.Append(t.Text);
}
return buf.ToString();
}
public string GetText(Interval interval)
{
return Substring(interval.a, interval.Length);
}
/// <summary>Return a new set with the intersection of this set with other.</summary>
/// <remarks>
/// Return a new set with the intersection of this set with other. Because
/// the intervals are sorted, we can use an iterator for each list and
/// just walk them together. This is roughly O(min(n,m)) for interval
/// list lengths n and m.
/// </remarks>
public virtual Antlr4.Runtime.Misc.IntervalSet And(IIntSet other)
{
if (other == null)
{
//|| !(other instanceof IntervalSet) ) {
return(null);
}
// nothing in common with null set
IList <Interval> myIntervals = this.intervals;
IList <Interval> theirIntervals = ((Antlr4.Runtime.Misc.IntervalSet)other).intervals;
Antlr4.Runtime.Misc.IntervalSet intersection = null;
int mySize = myIntervals.Count;
int theirSize = theirIntervals.Count;
int i = 0;
int j = 0;
// iterate down both interval lists looking for nondisjoint intervals
while (i < mySize && j < theirSize)
{
Interval mine = myIntervals[i];
Interval theirs = theirIntervals[j];
//System.out.println("mine="+mine+" and theirs="+theirs);
if (mine.StartsBeforeDisjoint(theirs))
{
// move this iterator looking for interval that might overlap
i++;
}
else
{
if (theirs.StartsBeforeDisjoint(mine))
{
// move other iterator looking for interval that might overlap
j++;
}
else
{
if (mine.ProperlyContains(theirs))
{
// overlap, add intersection, get next theirs
if (intersection == null)
{
intersection = new Antlr4.Runtime.Misc.IntervalSet();
}
intersection.Add(mine.Intersection(theirs));
j++;
}
else
{
if (theirs.ProperlyContains(mine))
{
// overlap, add intersection, get next mine
if (intersection == null)
{
intersection = new Antlr4.Runtime.Misc.IntervalSet();
}
intersection.Add(mine.Intersection(theirs));
i++;
}
else
{
if (!mine.Disjoint(theirs))
{
// overlap, add intersection
if (intersection == null)
{
intersection = new Antlr4.Runtime.Misc.IntervalSet();
}
intersection.Add(mine.Intersection(theirs));
// Move the iterator of lower range [a..b], but not
// the upper range as it may contain elements that will collide
// with the next iterator. So, if mine=[0..115] and
// theirs=[115..200], then intersection is 115 and move mine
// but not theirs as theirs may collide with the next range
// in thisIter.
// move both iterators to next ranges
if (mine.StartsAfterNonDisjoint(theirs))
{
j++;
}
else
{
if (theirs.StartsAfterNonDisjoint(mine))
{
i++;
}
}
}
}
}
}
}
}
if (intersection == null)
{
return(new Antlr4.Runtime.Misc.IntervalSet());
}
return(intersection);
}
/// <summary>Add interval; i.e., add all integers from a to b to set.</summary>
/// <remarks>
/// Add interval; i.e., add all integers from a to b to set.
/// If b<a, do nothing.
/// Keep list in sorted order (by left range value).
/// If overlap, combine ranges. For example,
/// If this is {1..5, 10..20}, adding 6..7 yields
/// {1..5, 6..7, 10..20}. Adding 4..8 yields {1..8, 10..20}.
/// </remarks>
public virtual void Add(int a, int b)
{
Add(Interval.Of(a, b));
}