stardict字典文件格式识别类

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这个类用于处理Stardict字典文件，提供按关键字查找单词和获取原文对应翻译的功能。通过FileStream和BinaryReader读取idx和dict文件，识别以特定结束符分隔的单词，并进行字节操作获取单词位置和大小，最终解码为UTF8字符串。

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

namespace cn.Laiyunqing
{
   public class nStarDict
    {
       private string idxFile;
       private string dictFile;

       public nStarDict(string idx, string dict)
       {
           this.idxFile = idx;
           this.dictFile = dict;
       }

       public List<string> Words(string key)
       {
           List<string> words = new List<string>();
           FileStream fsIdx = new FileStream(this.idxFile, FileMode.Open, FileAccess.Read);
           BinaryReader brIdx = new BinaryReader(fsIdx, Encoding.UTF8);
           byte[] ch = new byte[4096];
           byte end = (byte)'';
           int index = 0;
           for (index = 0; index < 4096; index++)
               ch[index] = (byte)'';
           index = 0;
           while (true)
           {
               try
               {
                   ch[index] = brIdx.ReadByte();
                   index++;
               }
               catch (EndOfStreamException)
               {
                   break;
               }
               if (ch[index - 1] == end)
               {
                   byte[] word = new byte[index - 1];
                   for (int i = 0; i < index - 1; i++)
                   {
                       word[i] = ch[i];
                       ch[i] = 0;
                   }
                 string queryString = Encoding.UTF8.GetString(word);
                 if (queryString.StartsWith(key, true, System.Globalization.CultureInfo.CurrentCulture))
                 {
                     words.Add(queryString);
                 }
               }
           }
           brIdx.Close();
           fsIdx.Close();
           return words;
       }

       public string Result(string originalText)
       {
           string translatedText = string.Empty;
           FileStream fsIdx = new FileStream(this.idxFile, FileMode.Open, FileAccess.Read);
           BinaryReader brIdx = new BinaryReader(fsIdx, Encoding.UTF8);
           FileStream fsDict = new FileStream(this.dictFile, FileMode.Open, FileAccess.Read);
           BinaryReader brDict = new BinaryReader(fsDict, Encoding.UTF8);
           byte[] ch = new byte[4096];
           byte end = (byte)'';
           int pos, size;
           int index = 0;
           for (index = 0; index < 4096; index++)
               ch[index] = (byte)'';
           index = 0;
           while (true)
           {
               try
               {
                   ch[index] = brIdx.ReadByte();
                   index++;
               }
               catch (EndOfStreamException)
               {
                   break;
               }
               if (ch[index - 1] == end)
               {
                   byte[] word = new byte[index - 1];
                   for (int i = 0; i < index - 1; i++)
                   {
                       word[i] = ch[i];
                       ch[i] = 0;
                   }
                   string queryString = Encoding.UTF8.GetString(word);

                   index = 0;
                   byte[] tmp = brIdx.ReadBytes(4);
                   pos = tmp[3] + (tmp[2] << 8) + (tmp[1] << 16) + (tmp[0] << 24);
                   tmp = brIdx.ReadBytes(4);
                   size = tmp[3] + (tmp[2] << 8) + (tmp[1] << 16) + (tmp[0] << 24);
                   byte[] content = brDict.ReadBytes(size);
                   string outText = Encoding.UTF8.GetString(content).Replace(" ", "</br>") + "</br>";
                   //是查询的单词
                   if (queryString == originalText)
                   {
                       translatedText = outText;
                       break;
                   }
               }
           }
           brDict.Close();
           fsDict.Close();
           brIdx.Close();
           fsIdx.Close();
           return translatedText;
       }

    }
}