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Test1.java
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package com.test.core;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
public class Test1 {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new FileReader( new File("assembleur.txt")));
BufferedWriter bw= new BufferedWriter(new FileWriter("temp.txt"));
HashMap<String,Integer> adds = new HashMap<String,Integer>();//用于存储跳转时跳转的标签及行号
String line = null;//用于存储从文本文件中读取出来的每一行
String write = null;//用于存储每行处理结果
String outputFileName = "output1.txt"; //输出文件的文件名，可自己指定文件路径，和文件名称
int n = 0;//用于记录行号
try {
while ((line = br.readLine())!=null){
/**处理标签,':'前为标签名称,后面为操作**/
if(line.contains(":")){
String parts[ ] = line.split(":");
adds.put(parts[0].trim(), n*4);
line = parts[1];
}
/**处理空行**/
if(line.equals("")){
bw.write("\n");
continue;
}
/**处理注释,直接回车换行**/
if(line.contains("#")){
if(line.startsWith("#")){
bw.write("\n");
continue;
}
else line = line.substring(0, line.indexOf("#")-1);
}
/**处理操作语句**/
//删除语句前后的空格
line = line.trim();
write = 4*n+"\t: ";
if(line.startsWith("read"))
write += "Scall 0";
else if(line.startsWith("write"))
write += "Scall 1";
else if(line.startsWith("stop"))
write += "Stop";
else if(line.startsWith("jmp"))
write += "Jmp ( " + params("jmp",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("braz"))
write += "Braz ( " + params("braz",line.subSequence(4, line.length()).toString())+" )";
else if(line.startsWith("add"))
write += "Op ( Add , " + params("add",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("sub"))
write += "Op ( Sub , " + params("sub",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("mult"))
write += "Op ( Mult , " + params("mult",line.subSequence(4, line.length()).toString())+" )";
else if(line.startsWith("div"))
write += "Op ( Div , " + params("div",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("and"))
write += "Op ( And , " + params("and",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("or"))
write += "Op ( Or , " + params("or",line.subSequence(2, line.length()).toString())+" )";
else if(line.startsWith("xor"))
write += "Op ( Xor , " + params("xor",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("shl"))
write += "Op ( Shl , " + params("shl",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("shr"))
write += "Op ( Shr , " + params("shr",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("slt"))
write += "Op ( Slt , " + params("slt",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("sle"))
write += "Op ( Sle , " + params("sle",line.subSequence(3, line.length()).toString())+" )";
else if(line.startsWith("load"))
write += "Op ( Load , " + params("load",line.subSequence(4, line.length()).toString())+" )";
else if(line.startsWith("store"))
write += "Op ( Store , " + params("store",line.subSequence(5, line.length()).toString())+" )";
bw.write(write + "\n");
n++;
}
bw.flush();
} catch (IOException e) {
e.printStackTrace();
}finally{
br.close();
bw.close();
}
/**替换文件中的变量**/
BufferedReader br1 = new BufferedReader(new FileReader( new File("temp.txt")));
BufferedWriter bw1= new BufferedWriter(new FileWriter(outputFileName));
while((line = br1.readLine())!=null)
{
//某行需要跳转到一个函数，而该函数的地址使用的是变量代替的
if(line.contains("{")){
String var = line.substring(line.indexOf("{")+1, line.indexOf("}"));
line = line.replace("{"+var+"}",String.valueOf(adds.get(var)));
}
bw1.write(line+"\n");
}
bw1.flush();
br1.close();
bw1.close();
/**删除临时文件**/
File f =new File("temp.txt");
f.delete();
}
/**
* 处理操作的参数
* @param subSequence 带处理的参数列表
* @return 处理后的参数
*/
private static String params(String op,String argStr) {
argStr = argStr.trim();
String args[] = argStr.split(",");
String result ="";
for(int i=0;i<args.length;i++)
{
args[i]=args[i].trim();
if(args[i].startsWith("ra")){
if ((op.equals("jmp") && i==0)||(args.length==3&&i==1))
args[i] = "Reg 31";
else
args[i] = "31";
}else if(args[i].startsWith("sp")){
if ((op.equals("jmp") && i==0)||(args.length==3&&i==1))
args[i] = "Reg 30";
else
args[i] = "30";
}else if(args[i].startsWith("r")){
if ((op.equals("jmp") && i==0)||(args.length==3&&i==1))
args[i] = "Reg "+ args[i].substring(1, args[i].length());
else
args[i] = args[i].substring(1, args[i].length());
}
//由于按时不知道函数的入口地址，所以用变量代替其地址，到时候记得进行替换
else if(args[i].startsWith("fact")){
if(op.equals("jmp") && i==0)
args[i] = "Imm {"+args[i]+"}";
else
args[i] = "{"+args[i]+"}";
}else{
if(op.equals("store")||op.equals("load")||op.equals("shl")||op.equals("shr"))
args[i] = String.valueOf(Integer.valueOf(args[i])/4);
args[i] = "Imm " + args[i];
}
result += args[i];
if(i<args.length-1)
result += " , ";
}
return result;
}
}