using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Collections;

namespace?FilterTest
{
????///?

????///?http://www.cnblogs.com/xingd/archive/2008/02/01/1061800.html上的方法
????///?

????public?class?BadWordsFilter
????{
????????private?HashSet?hash?=?new?HashSet（）;
????????private?byte[]?fastCheck?=?new?byte[char.MaxValue];
????????private?byte[]?fastLength?=?new?byte[char.MaxValue];
????????private?BitArray?charCheck?=?new?BitArray（char.MaxValue）;
????????private?BitArray?endCheck?=?new?BitArray（char.MaxValue）;
????????private?int?maxWordLength?=?0;
????????private?int?minWordLength?=?int.MaxValue;

????????public?BadWordsFilter（）
????????{
????????}

????????public?void?AddKey（string?word）
????????{
????????????maxWordLength?=?Math.Max（maxWordLength?word.Length）;
????????????minWordLength?=?Math.Min（minWordLength?word.Length）;

????????????for?（int?i?=?0;?i?????????????{
????????????????fastCheck[word[i]]?|=?（byte）（1?<????????????}

????????????for?（int?i?=?7;?i?????????????{
????????????????fastCheck[word[i]]?|=?0x80;
????????????}

????????????if?（word.Length?==?1）
????????????{
????????????????charCheck[word[0]]?=?true;
????????????}
????????????else
????????????{
????????????????fastLength[word[0]]?|=?（byte）（1?<????????????????endCheck[word[word.Length?-?1]]?=?true;
????????????????hash.Add（word）;
????????????}
????????}

????????public?string?Filter（string?text?string?mask）
????????{
????????????throw?new?NotImplementedException（）;
????????}

????????public?bool?HasBadWord（string?text）
????????{
????????????int?index?=?0;

????????????while?（index?????????????{
????????????????int?count?=?1;

????????????????if?（index?>?0?||?（fastCheck[text[index]]?&?1）?==?0）
????????????????{
????????????????????while?（index?????????????????}

????????????????char?begin?=?text[index];

????????????????if?（minWordLength?==?1?&&?charCheck[begin]）
????????????????{
????????????????????return?true;
????????????????}

????????????????for?（int?j?=?1;?j?<=?Math.Min（maxWordLength?text.Length?-?index?-?1）;?j++）
????????????????{
????????????????????char?current?=?text[index?+?j];

????????????????????if?（（fastCheck[current]?&?1）?==?0）
????????????????????{
????????????????????????++count;
????????????????????}

????????????????????if?（（fastCheck[current]?&?（1?<????????????????????{
????????????????????????break;
????????????????????}

????????????????????if?（j?+?1?>=?minWordLength）
????????????????????{
????????????????????????if?（（fastLength[begin]?&?（1?<?0?&&?endCheck[current]）
????????????????????????{
????????????????????????????string?sub?=?text.Substring（index?j?+?1）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-09-12?10:14??FilterTest\
?????目錄???????????0??2017-09-12?10:14??FilterTest\Backup\
?????目錄???????????0??2017-09-12?10:14??FilterTest\Backup\FilterTest\
?????文件???????65391??2011-08-25?22:53??FilterTest\Backup\FilterTest\BadWord.txt
?????文件????????3341??2011-09-01?13:51??FilterTest\Backup\FilterTest\BadWordsFilter.cs
?????文件????????3031??2011-08-25?23:15??FilterTest\Backup\FilterTest\CodeTimer.cs
?????文件????????2916??2011-09-01?13:43??FilterTest\Backup\FilterTest\FilterTest.csproj
?????文件?????????168??2011-09-01?13:43??FilterTest\Backup\FilterTest\FilterTest.csproj.user
?????文件????????3002??2011-09-01?13:43??FilterTest\Backup\FilterTest\HashFilter.cs
?????文件????????2938??2011-09-01?13:50??FilterTest\Backup\FilterTest\Program.cs
?????目錄???????????0??2017-09-12?10:14??FilterTest\Backup\FilterTest\Properties\
?????文件????????1376??2011-09-01?13:33??FilterTest\Backup\FilterTest\Properties\AssemblyInfo.cs
?????文件????????1285??2011-08-29?07:34??FilterTest\Backup\FilterTest\Talk.txt
?????文件????????5634??2011-09-01?13:46??FilterTest\Backup\FilterTest\TrieFilter.cs
?????文件?????????920??2011-09-01?13:33??FilterTest\Backup\FilterTest.sln
?????目錄???????????0??2017-09-12?10:15??FilterTest\FilterTest\
?????文件????????3341??2011-09-01?13:51??FilterTest\FilterTest\BadWordsFilter.cs
?????文件????????3031??2011-08-25?23:15??FilterTest\FilterTest\CodeTimer.cs
?????文件????????4405??2017-04-11?14:38??FilterTest\FilterTest\FilterTest.csproj
?????文件?????????498??2017-04-11?14:38??FilterTest\FilterTest\FilterTest.csproj.user
?????文件????????3002??2011-09-01?13:43??FilterTest\FilterTest\HashFilter.cs
?????文件????????4608??2017-04-12?18:31??FilterTest\FilterTest\Program.cs
?????目錄???????????0??2017-09-12?10:14??FilterTest\FilterTest\Properties\
?????文件????????1376??2011-09-01?13:33??FilterTest\FilterTest\Properties\AssemblyInfo.cs
?????文件????????1285??2011-08-29?07:34??FilterTest\FilterTest\Talk.txt
?????文件????????5688??2017-04-11?14:38??FilterTest\FilterTest\TrieFilter.cs
?????文件?????????161??2017-04-11?14:38??FilterTest\FilterTest\app.config
?????目錄???????????0??2017-09-12?10:14??FilterTest\FilterTest\bin\
?????目錄???????????0??2017-09-12?10:14??FilterTest\FilterTest\bin\Debug\
?????文件?????1607406??2017-04-12?11:15??FilterTest\FilterTest\bin\Debug\BadWord.txt
?????文件???????14848??2017-04-12?18:33??FilterTest\FilterTest\bin\Debug\FilterTest.exe
............此處省略20個文件信息