/src/Manos/Manos.Routing/StringMatchOperation.cs

 1//
 2// Copyright (C) 2010 Jackson Harper (jackson@manosdemono.com)
 3//
 4// Permission is hereby granted, free of charge, to any person obtaining
 5// a copy of this software and associated documentation files (the
 6// "Software"), to deal in the Software without restriction, including
 7// without limitation the rights to use, copy, modify, merge, publish,
 8// distribute, sublicense, and/or sell copies of the Software, and to
 9// permit persons to whom the Software is furnished to do so, subject to
10// the following conditions:
11// 
12// The above copyright notice and this permission notice shall be
13// included in all copies or substantial portions of the Software.
14// 
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22//
23//
24
25
26using System;
27using System.Collections.Specialized;
28using Manos.Collections;
29
30namespace Manos.Routing
31{
32
33
34	public class StringMatchOperation : IMatchOperation
35	{
36		private string str;
37		
38		public StringMatchOperation (string str)
39		{
40			String = str;
41		}
42		
43		public string String {
44			get { return str; }
45			set {
46				if (value == null)
47					throw new ArgumentNullException ("value");
48				if (value.Length == 0)
49					throw new ArgumentException ("StringMatch operations should not use empty strings.");
50				str = value.ToLower();
51			}
52		}
53	
54		public bool IsMatch (string input, int start, out DataDictionary data, out int end)
55		{
56			return IsMatchInternal (String, input, start, out data, out end);
57		}
58
59		internal static bool IsMatchInternal (string the_string, string input, int start, out DataDictionary data, out int end)
60		{
61			if (!StartsWith (input, start, the_string)) {
62				data = null;
63				end = start;
64				return false;
65			}
66
67			data = null;
68			end = start + the_string.Length;
69			return true;
70		}
71
72		public static bool StartsWith (string input, int start, string str)
73		{
74			if (input.Length < str.Length + start)
75				return false;
76				
77			return String.Compare (input, start, str, 0, str.Length, StringComparison.OrdinalIgnoreCase) == 0;
78		}
79		
80	}
81}