/// <summary>
/// 最大匹配,从chs[offset]开始匹配，同时把chs[offset]的字符终点保存在cns[cnIdx]
/// </summary>
/// <param name="cns"></param>
/// <param name="cnIdx"></param>
/// <param name="chs"></param>
/// <param name="offset"></param>
/// <returns>最大匹配到的词尾长,>0 找到</returns>
protected int MaxMatch(CharNode[] cns, int cnIdx, char[] chs, int offset)
{
CharNode cn = null;
if (offset < chs.Length)
{
cn = dic.head(chs[offset]);
}
cns[cnIdx] = cn;
return(dic.maxMatch(cn, chs, offset));
}
