/// <summary>
/// Constructs the range given a start and an end location
/// </summary>
/// <param name="startOffset">The offset of the first value of the range.</param>
/// <param name="firstValue">The first value of the range</param>
/// <param name="lastOffset">The offset within the range of the last value.</param>
/// <param name="endValue">The last value of the range.</param>
public IndexRange(RangeFieldOffset startOffset, Field firstValue, RangeFieldOffset lastOffset, Field endValue)
: this(false) {
StartOffset = startOffset;
StartValue = firstValue;
EndOffset = lastOffset;
EndValue = endValue;
}
/// <summary>
/// Constructs the range given a start and an end location
/// </summary>
/// <param name="startOffset">The offset of the first value of the range.</param>
/// <param name="firstValue">The first value of the range</param>
/// <param name="lastOffset">The offset within the range of the last value.</param>
/// <param name="endValue">The last value of the range.</param>
public IndexRange(RangeFieldOffset startOffset, DataObject firstValue, RangeFieldOffset lastOffset, DataObject endValue)
: this(false)
{
StartOffset = startOffset;
StartValue = firstValue;
EndOffset = lastOffset;
EndValue = endValue;
}
private int PositionOfRangePoint(RangeFieldOffset position, DataObject val)
{
int p;
DataObject cell;
switch (position)
{
case RangeFieldOffset.FirstValue:
if (val.Equals(IndexRange.FirstInSet))
{
return(0);
}
if (val.Equals(IndexRange.LastInSet))
{
// Get the last value and search for the first instance of it.
cell = Last;
}
else
{
cell = val;
}
p = SearchFirst(cell);
// (If value not found)
if (p < 0)
{
return(-(p + 1));
}
return(p);
case RangeFieldOffset.LastValue:
if (val.Equals(IndexRange.LastInSet))
{
return(Count - 1);
}
if (val.Equals(IndexRange.FirstInSet))
{
// Get the first value.
cell = First;
}
else
{
cell = val;
}
p = SearchLast(cell);
// (If value not found)
if (p < 0)
{
return(-(p + 1) - 1);
}
return(p);
case RangeFieldOffset.BeforeFirstValue:
if (val.Equals(IndexRange.FirstInSet))
{
return(-1);
}
if (val.Equals(IndexRange.LastInSet))
{
// Get the last value and search for the first instance of it.
cell = Last;
}
else
{
cell = val;
}
p = SearchFirst(cell);
// (If value not found)
if (p < 0)
{
return(-(p + 1) - 1);
}
return(p - 1);
case RangeFieldOffset.AfterLastValue:
if (val.Equals(IndexRange.LastInSet))
{
return(Count);
}
if (val.Equals(IndexRange.FirstInSet))
{
// Get the first value.
cell = First;
}
else
{
cell = val;
}
p = SearchLast(cell);
// (If value not found)
if (p < 0)
{
return(-(p + 1));
}
return(p + 1);
default:
throw new InvalidOperationException("Unrecognised position.");
}
}
private int PositionOfRangePoint(RangeFieldOffset position, DataObject val)
{
int p;
DataObject cell;
switch (position) {
case RangeFieldOffset.FirstValue:
if (val.Equals(IndexRange.FirstInSet)) {
return 0;
}
if (val.Equals(IndexRange.LastInSet)) {
// Get the last value and search for the first instance of it.
cell = Last;
} else {
cell = val;
}
p = SearchFirst(cell);
// (If value not found)
if (p < 0)
return -(p + 1);
return p;
case RangeFieldOffset.LastValue:
if (val.Equals(IndexRange.LastInSet))
return Count - 1;
if (val.Equals(IndexRange.FirstInSet)) {
// Get the first value.
cell = First;
} else {
cell = val;
}
p = SearchLast(cell);
// (If value not found)
if (p < 0) {
return -(p + 1) - 1;
}
return p;
case RangeFieldOffset.BeforeFirstValue:
if (val.Equals(IndexRange.FirstInSet))
return -1;
if (val.Equals(IndexRange.LastInSet)) {
// Get the last value and search for the first instance of it.
cell = Last;
} else {
cell = val;
}
p = SearchFirst(cell);
// (If value not found)
if (p < 0) {
return -(p + 1) - 1;
}
return p - 1;
case RangeFieldOffset.AfterLastValue:
if (val.Equals(IndexRange.LastInSet)) {
return Count;
}
if (val.Equals(IndexRange.FirstInSet)) {
// Get the first value.
cell = First;
} else {
cell = val;
}
p = SearchLast(cell);
// (If value not found)
if (p < 0) {
return -(p + 1);
}
return p + 1;
default:
throw new InvalidOperationException("Unrecognised position.");
}
}