Region Matches - CSharp System

CSharp examples for System:String Match

  1. HOME
  2. CSharp
  3. System
  4. String Match

Description

Region Matches

Demo Code


using System;//  ww w.  j a  v a  2s  . c o  m

public class Main{
        public static bool RegionMatches(this string value, bool ignoreCase, int toffset, string other, int ooffset, int len)
		{
			char[] ta = value.ToCharArray();
			int to = toffset;
			char[] pa = other.ToCharArray();
			int po = ooffset;
			// Note: toffset, ooffset, or len might be near -1>>>1.
			if ((ooffset < 0) || (toffset < 0)
			    || (toffset > (long)value.Length - len)
			    || (ooffset > (long)other.Length - len))
			{
				return false;
			}
			while (len-- > 0)
			{
				char c1 = ta[to++];
				char c2 = pa[po++];
				if (c1 == c2)
				{
					continue;
				}
				if (ignoreCase)
				{
					// If characters don't match but case may be ignored,
					// try converting both characters to uppercase.
					// If the results match, then the comparison scan should
					// continue.
					char u1 = char.ToUpper(c1);
					char u2 = char.ToUpper(c2);
					if (u1 == u2)
					{
						continue;
					}
					// Unfortunately, conversion to uppercase does not work properly
					// for the Georgian alphabet, which has strange rules about case
					// conversion.  So we need to make one last check before
					// exiting.
					if (char.ToLower(u1) == char.ToLower(u2))
					{
						continue;
					}
				}
				return false;
			}
			return true;
		}
}

Related Tutorials