81 lines
2.6 KiB
Java
81 lines
2.6 KiB
Java
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import java.util.LinkedList;
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import java.io.*;
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public class CodeGenerator {
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LinkedList <Instruction> instructions = new LinkedList <Instruction>();
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int label=0;
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public void emit( OpCode opCode) {
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instructions.add( new Instruction(opCode));
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}
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public void emit( OpCode opCode , int operand ) {
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instructions.add( new Instruction( opCode, operand ));
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}
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public void emitLabel (int operand ) {
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emit( OpCode.label , operand );
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}
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public int newLabel () {
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return label++;
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}
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public void toJasmin () throws IOException{
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PrintWriter out = new PrintWriter(new FileWriter("C:\\Users\\sproston\\Documents\\LFT1718\\CommandLine\\Output\\Output.j"));
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String temp = "";
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temp = temp + header;
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while(instructions.size() > 0){
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Instruction tmp = instructions.remove();
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temp = temp + tmp.toJasmin();
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}
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temp = temp + footer;
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out.println(temp);
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out.flush();
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out.close();
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}
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private static final String header = ".class public Output \n"+ ".super java/lang/Object\n"
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+ "\n"
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+ ".method public <init>()V\n"
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+ " aload_0\n"
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+ " invokenonvirtual java/lang/Object/<init>()V\n"
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+ " return\n"
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+ ".end method\n"
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+ "\n"
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+ ".method public static print(I)V\n"
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+ " .limit stack 2\n"
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+ " getstatic java/lang/System/out Ljava/io/PrintStream;\n"
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+ " iload_0 \n"
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+ " invokestatic java/lang/Integer/toString(I)Ljava/lang/String;\n"
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+ " invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V\n"
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+ " return\n"
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+ ".end method\n"
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+ "\n"
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+ ".method public static read()I\n"
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+ " .limit stack 3\n"
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+ " new java/util/Scanner\n"
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+ " dup\n"
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+ " getstatic java/lang/System/in Ljava/io/InputStream;\n"
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+ " invokespecial java/util/Scanner/<init>(Ljava/io/InputStream;)V\n"
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+ " invokevirtual java/util/Scanner/next()Ljava/lang/String;\n"
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+ " invokestatic java/lang/Integer.parseInt(Ljava/lang/String;)I\n"
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+ " ireturn\n"
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+ ".end method\n"
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+ ".method public static run()V\n"
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+ " .limit stack 1024\n"
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+ " .limit locals 256\n";
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private static final String footer = " return\n"
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+ ".end method\n"
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+ "\n"
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+ ".method public static main([Ljava/lang/String;)V\n"
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+ " invokestatic Output/run()V\n"
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+ " return\n"
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+ ".end method\n";
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}
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