/// <summary>
/// This will return a StringHandle for the simple name of a namespace name at the given segment index.
/// If no segment index is passed explicitly or the "segment" index is greater than or equal to the number
/// of segments, then the last segment is used. "Segment" in this context refers to part of a namespace
/// name between dots.
///
/// Example: Given a NamespaceDefinitionHandle to "System.Collections.Generic.Test" called 'handle':
///
/// reader.GetString(GetSimpleName(handle)) == "Test"
/// reader.GetString(GetSimpleName(handle, 0)) == "System"
/// reader.GetString(GetSimpleName(handle, 1)) == "Collections"
/// reader.GetString(GetSimpleName(handle, 2)) == "Generic"
/// reader.GetString(GetSimpleName(handle, 3)) == "Test"
/// reader.GetString(GetSimpleName(handle, 1000)) == "Test"
/// </summary>
private StringHandle GetSimpleName(NamespaceDefinitionHandle fullNamespaceHandle, int segmentIndex = Int32.MaxValue)
{
StringHandle handleContainingSegment = fullNamespaceHandle.GetFullName();
Debug.Assert(!handleContainingSegment.IsVirtual);
int lastFoundIndex = fullNamespaceHandle.Index - 1;
int currentSegment = 0;
while (currentSegment < segmentIndex)
{
int currentIndex = _metadataReader.StringStream.IndexOfRaw(lastFoundIndex + 1, '.');
if (currentIndex == -1)
{
break;
}
lastFoundIndex = currentIndex;
++currentSegment;
}
Debug.Assert(lastFoundIndex >= 0 || currentSegment == 0);
// + 1 because lastFoundIndex will either "point" to a '.', or will be -1. Either way,
// we want the next char.
uint resultIndex = (uint)(lastFoundIndex + 1);
return(StringHandle.FromIndex(resultIndex).WithDotTermination());
}
internal StringHandle GetNextHandle(StringHandle handle)
{
if (handle.IsVirtual)
{
return(default(StringHandle));
}
int terminator = this.Block.IndexOf(0, handle.Index);
if (terminator == -1 || terminator == Block.Length - 1)
{
return(default(StringHandle));
}
return(StringHandle.FromIndex((uint)(terminator + 1)));
}