main.cpp

一个c语言的编译器的源代码

// Main function of the compiler
//
// Written by bood, [e-mail], http://boodweb.126.com
// 2004-08-06

// Adds support for simple preprocessing
// i.e. file include and simple macro definition
// bood, 2005-03-13

// Disable the awful warnings
#pragma warning(disable:4786)

#include <iostream>
#include <cmath>
#include <algorithm>
#include <iomanip>
#include <fstream>
#include "global.h"
#include "pp_scan.h"
#include "scan.h"
#include "parse.h"
#include "analyze.h"
#include "symtable.h"
#include "code.h"
#include "util.h"



using namespace std;
void copyright()
{
	cout<<"\nC Minus Compiler v0.2\n";
	cout<<"According to the design in the book\n"
		"\"Compiler Construction Principles and Practice\""
		" by Kenneth C. Louden\n";
	cout<<"Generate assmeble code, link using MASM/TASM\n\n";
	cout<<"Wrriten by bood, 2004-08-13\n";
	cout<<"Homepage: http://boodweb.126.com\n";
	cout<<"Email: [e-mail]\n\n";
}
int main(int argc,char *argv[])
{
	init();
	copyright();
	if(argc<2){
		cout<<"No source file specified."<<endl;
		cout<<"Usgae: cminus <source file>\n";
		return 0;
	}

    // preprocessing into preproc.txt
    fpreproc.open("preproc.txt");
    preprocess(argv[1], fpreproc);
    fpreproc.close();

    include_it = include_list.begin();

    // compile preproc.txt just as before
	fsource.open("preproc.txt");
	ftoken.open("token.txt");
	fsyntax.open("syntax.txt");
	fsymbol.open("symbol.txt");
	fcode.open("code.txt");
	TreeNode *p=parse();
	PrintSyntaxTree(p,fsyntax);
	BuildSymbolTable(p);
    if(bSemanticError) {
        cout<<"Semantic error found, compilation stopped\n";
        return 0;
    }
	fsymbol<<"name"<<"\t\t"<<"location"
		<<"\t\t"<<"lineno"<<"\t\t"<<
		"nestlevel"<<endl;
	PrintOneTable(&GlobalBucket,fsymbol);
	PrintSymbolTable(p,fsymbol);
	TypeCheck(p);
    if(bSemanticError) {
        cout<<"Semantic error found, compilation stopped\n";
        return 0;
    }
	genCode(p);
	return 0;
}