public static System.String ReplaceLeftWhiteSpacesUntil(this System.String String, System.Char NewChar, System.Char[] IgnoreChars)
        {
            if (System.String.IsNullOrEmpty(String))
            {
                return(String);
            }

            if (System.String.IsNullOrWhiteSpace(String))
            {
                return(String.Replace(' ', NewChar));
            }

            if (IgnoreChars == null)
            {
                IgnoreChars = new System.Char[] { ' ' }
            }
            ;
            else
            {
                IgnoreChars = IgnoreChars.Concat(new System.Char[] { ' ' }).ToArray();
            }

            System.Int32 Count = 0;
            while ((Count < String.Length) && (IgnoreChars.Contains(String[Count])))
            {
                Count++;
            }

            String = $"{String.Substring(0, Count).Replace(' ', NewChar)}{String.Substring(Count)}";
            return(String);
        }
Esempio n. 2
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        /// <summary>
        /// 贪婪式匹配,线程安全
        /// </summary>
        /// <param name="s">要判断的字符串</param>
        /// <param name="pos">从字符串的哪个位置开始判断</param>
        /// <returns>返回最长匹配点的下一个位置</returns>
        public int MatchGreedy(string s, int pos)
        {
            // 如果源串已结束,则
            // 如果本节点是终点,则匹配,否则不匹配
            if (pos == s.Length)
            {
                // 如果本节点是终点,匹配!否则不匹配
                return(this.isEnd_ ? pos : -1); //         alreadyMatchLength: alreadyMatchLength - 1;
            }
            // 没有后续字符了(本结点是叶结点)
            // 说明已经达到最长匹配了
            if (children_ == null)
            {
                return(pos);
            }
            // 源串未结束,找后续字符
            char ch = s[pos];

#if SMART_CHECK_SEPARATER
            if (IgnoreChars.Include(ch))
            {
                return(MatchGreedy(s, pos + 1));
            }
#endif
            ch = char.ToLower(ch);
            //
            Node node;
            lock (children_) {
                if (!children_.TryGetValue(ch, out node))
                {
                    node = null;
                }
            }
            if (node != null)
            {
                // 后续字符找到了,继续
                int p = node.MatchGreedy(s, pos + 1);
                if (p > pos)
                {
                    return(p);
                }
                else
                {
                    if (this.isEnd_)
                    {
                        return(pos);
                    }
                    else
                    {
                        return(-1);
                    }
                }
            }
            else
            {
                // 后续字符不匹配
                return(this.isEnd_ ? pos : -1);
            }
        }
Esempio n. 3
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    /// <summary>
    /// 将字串中的关键字替换成指定字符
    /// (服务器不用这段代码,不用保证线程安全)
    /// </summary>
    /// <param name="s"></param>
    /// <param name="replaced"></param>
    /// <returns></returns>
    public string Replace(string s, char replaceChar)
    {
        if (string.IsNullOrEmpty(s))
        {
            return(string.Empty);
        }
        char[] chars = null;
        for (int i = 0; i < s.Length;)
        {
            int p = root_.MatchGreedy(s, i);
            if (p > i)
            {
                // 找到最长匹配了,替换
                if (chars == null)
                {
                    chars = s.ToCharArray();
                }
                for (int n = i; n < p; ++n)
                {
#if SMART_CHECK_SEPARATER
                    if (!IgnoreChars.Include(chars[n]))
                    {
                        chars[n] = replaceChar;
                    }
#else
                    chars[n] = replaceChar;
#endif
                }
                i = p;
            }
            else
            {
                ++i;
            }
        }
        //
        if (chars != null)
        {
            return(new string(chars));
        }
        else
        {
            return(s);
        }
    }
Esempio n. 4
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        public bool Match(string s, int pos)
        {
            // 本结点是叶结点,或是一个终点
            if (this.isEnd_ || children_ == null)
            {
                return(true);
            }
            // 源串已结束,说明不匹配
            if (pos == s.Length)
            {
                return(false);
            }
            // 源串未结束,找后续字符
            char ch = char.ToLower(s[pos]);
            Node node;

            lock (children_) {
                if (!children_.TryGetValue(ch, out node))
                {
                    node = null;
                }
            }
            if (node != null)
            {
                // 后续字符找到了,继续
                return(node.Match(s, pos + 1));
            }
            else
            {
                // 后续字符不匹配(比如关键词是ABC,则ABD不能匹配)
#if SMART_CHECK_SEPARATER
                if (IgnoreChars.Include(ch))
                {
                    return(Match(s, pos + 1));
                }
#endif
                return(false);
            }
        }
Esempio n. 5
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    /// <summary>
    /// 加入一个脏字串
    /// </summary>
    /// <param name="badWord">不为null的关键字</param>
    public void AddBadWord(string badWord)
    {
#if SMART_CHECK_SEPARATER
        StringBuilder sb = new StringBuilder(badWord.Length);
        foreach (char ch in badWord)
        {
            if (!IgnoreChars.Include(ch))
            {
                sb.Append(ch);
            }
        }
        if (sb.Length != badWord.Length)
        {
            badWord = sb.ToString();
        }
#endif
        if (badWord.Length > 0)
        {
            lock (locker_) {
                root_.AddChild(badWord, 0);
            }
        }
    }