今天继续研究代码解析的算法
这个是算法流程图
有图解可能更直观一点;
以下是c#源码:
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using System;
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using System.IO;
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using System.Text;
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using System.Windows.Forms;
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using System.Collections;
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namespace CodeFormatter {
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/// <summary>
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/// CodeFormatterFactory 的摘要说明。
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/// c 代码解析,不支持中文
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/// </summary>
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public class CodeFormatterFactory {
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/*源代码*/
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private string sourceCode = "";
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/*C语言所有关键字,共32个*/
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ArrayList KeyWordList = new ArrayList();
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/*运算、限界符*/
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ArrayList LimitList = new ArrayList();
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/*常量表*/
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ArrayList ConstList = new ArrayList();
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/*标识符*/
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ArrayList IdentifierList = new ArrayList();
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/*输出*/
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ArrayList OutputList = new ArrayList();
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public CodeFormatterFactory() {
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//
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// TODO: 在此处添加构造函数逻辑
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//
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init();
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}
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public string SourceCode{
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get{return this.sourceCode;}
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set{this.sourceCode =value;}
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}
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public string ParseMessages{
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get{
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string pm = "";
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IEnumerator ie = this.OutputList.GetEnumerator();
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while ( ie.MoveNext() )
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pm += ie.Current.ToString() + "
";
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return pm;
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}
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}
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private void init() {
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/*C语言所有关键字,共32个*/
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string[] key=new string[]{" ","auto","break","case","char","const","continue","default","do","double",
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"else","enum","extern","float","for","goto","if","int","long","register",
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"return","short","signed","sizeof","static","struct","switch","typedef",
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"union","unsigned","void","volatile","while"};
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/*运算、限界符*/
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string[] limit=new string[]{" ","(",")","[","]","->",".","!","++","--","&","~",
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"*","/","%","+","-","<<",">>","<","<=",">",">=","==","!=","&&","||",
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"=","+=","-=","*=","/=",",",";","{","}","#","_","'"};
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this.KeyWordList.Clear();
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this.KeyWordList.TrimToSize();
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for(int i=1;i<key.Length;i++)
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this.KeyWordList.Add(key[i]);
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this.LimitList.Clear();
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this.LimitList.TrimToSize();
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for(int i=1;i<limit.Length;i++)
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this.LimitList.Add(limit[i]);
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this.ConstList.Clear();
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this.ConstList.TrimToSize();
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this.IdentifierList.Clear();
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this.IdentifierList.TrimToSize();
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this.OutputList.Clear();
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this.OutputList.TrimToSize();
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}
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/*******************************************
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* 十进制转二进制函数
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*******************************************/
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private string dtb(string buf){
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int[] temp= new int[20];
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string binary = "";
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int val=0,i=0;
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/*先将字符转化为十进制数*/
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try{
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val = Convert.ToInt32(buf);
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}catch{
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val = 0;
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}
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if(val==0) {
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return(val.ToString());
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}
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i=0;
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while(val!=0) {
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temp[i++]=val%2;
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val/=2;
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}
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binary = "";
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for(int j=0;j<=i-1;j++)
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binary += (char)(temp[i-j-1]+48);
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return(binary);
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}
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/*******************************************
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* 根据不同命令查表或造表函数
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*******************************************/
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private int find(string buf,int type,int command){
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int number=0;
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string temp;
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IEnumerator ie = null;
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ArrayList al = null;
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switch(type){
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case 1://关键字表
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ie = this.KeyWordList.GetEnumerator();
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break;
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case 2://标识符表
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ie = this.IdentifierList.GetEnumerator();
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break;
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case 3://常数表
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ie = this.ConstList.GetEnumerator();
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break;
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case 4://运算、限界符表
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ie = this.LimitList.GetEnumerator();
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break;
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}
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if(ie!=null)
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while (ie.MoveNext()){
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temp = ie.Current.ToString();
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if(temp.Trim().ToLower()==buf.Trim().ToLower()){
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return number;
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}
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number ++;
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}
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if(command==1){
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/*找不到,当只需查表,返回0,否则还需造表*/
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return 0;
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}
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switch(type){
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case 1: al = this.KeyWordList;break;
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case 2: al = this.IdentifierList;break;
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case 3: al = this.ConstList;break;
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case 4: al = this.LimitList;break;
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}
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if(al!=null)
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al.Add(buf);
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return number + 1;
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}
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/*******************************************
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* 数字串处理函数
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*******************************************/
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private void cs_manage(string buffer){
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string binary = dtb(buffer);
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int result = find(binary,3,2);
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this.OutputList.Add(String.Format("{0} 3 {1}",buffer,result));
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}
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/*******************************************
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* 字符串处理函数
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*******************************************/
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private void ch_manage(string buffer) {
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int result = find(buffer,1,1);
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if(result!=0){
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this.OutputList.Add(String.Format("{0} 1 {1}",buffer,result));
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}else{
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result = find(buffer,2,2);
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this.OutputList.Add(String.Format("{0} 2 {1}",buffer,result));
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}
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}
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/*******************************************
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* 出错处理函数
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*******************************************/
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private void er_manage(char error,int lineno) {
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this.OutputList.Add(String.Format("错误关键字: {0} ,所在行: {1}",error,lineno));
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}
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/*******************************************
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* 转换Char数组为string
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******************************************/
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private string joinString(char[] array,int Length){
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string s = "";
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if(array.Length>0)
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for(int i=0;i<Length;i++){
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if(array[i]!='
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