Sourcetrail/ide_plugins/vs/vs2015/SourcetrailPlugin/SourcetrailPlugin/Utility/StringUtility.cs

using System;

namespace CoatiSoftware.SourcetrailPlugin.Utility
{
	public class StringUtility
	{
		static public Tuple<int, int> FindFirstRange(string text, string startTag, string endTag)
		{
			if(startTag.Length > 0 && endTag.Length > 0 && (startTag.Length + endTag.Length) < text.Length)
			{
				int start = text.IndexOf(startTag);
				int end = text.IndexOf(endTag);

				// just check wheter both, start and end, are valid and the end tag occurs after the start tag
				if(start > -1 && end > -1 && end > start)
				{
					return new Tuple<int, int>(start, end);
				}
			}

			return null;
		}

		static public int GetMatchingCharsFromStart(string a, string b)
		{
			int matchingChars = 0;

			if (a != string.Empty)
			{
				a = a.ToLower();
			}
			else
			{
				return matchingChars;
			}

			if (b != string.Empty)
			{
				b = b.ToLower();
			}
			else
			{
				return matchingChars;
			}

			for (int i = 0; i < Math.Min(a.Length, b.Length); i++)
			{
				if (!char.Equals(a[i], b[i]))
				{
					break;
				}
				else
				{
					matchingChars++;
				}
			}

			return matchingChars;
		}
	}
}