using System;
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using System.Text.RegularExpressions;
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using System.Threading;
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namespace iWare_SCADA_BusinessLogical
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{
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public static class RegexExtension
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{
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/// <summary>
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/// 启动一个线程执行操作，同时设置超时时间。
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/// var r = WithTimeout(() => regex.Match(foo), 1000);
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/// </summary>
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/// <typeparam name="TR"></typeparam>
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/// <param name="proc"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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private static TR WithTimeout<TR>(Func<TR> proc, int duration)
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{
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var reset = new AutoResetEvent(false);
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var r = default(TR);
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Exception ex = null;
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var t = new Thread(() =>
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{
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try
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{
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r = proc();
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}
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catch (Exception e)
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{
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ex = e;
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}
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reset.Set();
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});
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t.Start();
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if (!reset.WaitOne(duration))
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{
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t.Abort();
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throw new TimeoutException();
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}
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if (ex != null)
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{
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throw ex;
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}
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return r;
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}
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/// <summary>
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/// 判断正则是否匹配, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="startat"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static bool IsMatchWithTimeout(this Regex regex, string input, int startat, int duration)
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{
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return regex.IsMatchWithTimeout(input, 0, duration);
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}
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/// <summary>
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/// 判断正则是否匹配, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static bool IsMatchWithTimeout(this Regex regex, string input, int duration)
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{
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if (regex == null)
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throw new NullReferenceException();
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return WithTimeout(() => regex.IsMatch(input), duration);
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}
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/// <summary>
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/// 匹配正则, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="startat"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static Match MatchWithTimeout(this Regex regex, string input, int startat, int duration)
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{
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if (regex == null)
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throw new NullReferenceException();
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return WithTimeout(() => regex.Match(input, startat), duration);
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}
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/// <summary>
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/// 匹配正则, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static Match MatchWithTimeout(this Regex regex, string input, int duration)
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{
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return regex.MatchWithTimeout(input, 0, duration);
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}
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/// <summary>
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/// 匹配正则, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="startat"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static MatchCollection MatchesWithTimeout(this Regex regex, string input, int startat, int duration)
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{
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if (regex == null)
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throw new NullReferenceException();
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return WithTimeout(() => regex.Matches(input, startat), duration);
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}
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/// <summary>
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/// 匹配正则, duration毫秒后报超时异常
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/// </summary>
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/// <param name="regex"></param>
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/// <param name="input"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static MatchCollection MatchesWithTimeout(this Regex regex, string input, int duration)
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{
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return regex.MatchesWithTimeout(input, 0, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="options"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static bool IsMatch(string input, string pattern, RegexOptions options, int duration)
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{
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var regex = new Regex(pattern, options);
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return regex.IsMatchWithTimeout(input, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static bool IsMatch(string input, string pattern, int duration)
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{
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return IsMatch(input, pattern, RegexOptions.None, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="options"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static Match Match(string input, string pattern, RegexOptions options, int duration)
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{
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var regex = new Regex(pattern, options);
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return regex.MatchWithTimeout(input, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static Match Match(string input, string pattern, int duration)
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{
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return Match(input, pattern, RegexOptions.None, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="options"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static MatchCollection Matches(string input, string pattern, RegexOptions options, int duration)
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{
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var regex = new Regex(pattern, options);
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return regex.MatchesWithTimeout(input, duration);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="input"></param>
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/// <param name="pattern"></param>
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/// <param name="duration"></param>
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/// <returns></returns>
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public static MatchCollection Matches(string input, string pattern, int duration)
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{
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return Matches(input, pattern, RegexOptions.None, duration);
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}
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}
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}
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