main.c

参照清华大学《编译原理》写的cmm语言语法分析程序

/** 
 * @file main.c
 * @brief  主程序
 * @author Shiquan Ye, [e-mail]
 * @date 2008-11-12
 */

/*
 * Copyright (C) 2008 - Shiquan Ye, [e-mail]
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include "globals.h"
#include "scan.h"
#include "parse.h"
#include "analyze.h"
#include "cgen.h"

/* allocate global variables */ 
int lineno = 0; /* 行号 */ 
FILE * source;
FILE * listing;
FILE * code;
int Error = FALSE;

int main(int argc, char * argv[]) {
      TreeNode * syntaxTree;
      char pgm[120];    /* 源文件名 */
      if (argc != 2) {
            fprintf(stderr,"usage: %s <filename>\n",argv[0]);
            exit(1);
      }
      strcpy(pgm,argv[1]);
      if (strchr(pgm,'.') == NULL) strcat(pgm,".cmm");
      if ( (source = fopen(pgm,"r")) == NULL) {
            fprintf(stderr,"File %s not found\n",pgm);
            exit(1);
      }
      listing = stdout; /* 向终端输出 */
      int i = 0;
      TreeNode * t = parse();
      return 1;
}