using System;
using System.Collections.Generic;
using System.IO;

namespace SBRL.Utilities
{
	static class LineIterator {
		
		public static IEnumerable<string> GetLines(TextReader source)
		{
			string nextLine;
			while ((nextLine = source.ReadLine()) != null) {
				yield return nextLine;
			}
		}

		public static IEnumerable<string> GetLines(string source)
		{
			source = source.Replace("\r\n", "\n");
			int curPosition = 0, nextIndex;
			while (true)
			{
				nextIndex = source.IndexOf("\n", curPosition);
				if (nextIndex == -1)
					break;

				yield return source.Substring(curPosition, nextIndex - curPosition);

				curPosition = nextIndex + 1;
			}
		}

	}
}