main.c

小型编译器之C-词法分析器 可以作为一般小型编译器的模板

/****************************************************/
/* File: main.c                                     */
/* Main program for TINY compiler                   */
/* Compiler Construction: Principles and Practice   */
/* Kenneth C. Louden                                */
/****************************************************/

#include "globals.h"

/* set NO_PARSE to TRUE to get a scanner-only compiler */
#define NO_PARSE TRUE
#include "util.h"
#include "scan.h"
#include "parse.h"


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

/* allocate and set tracing flags */
int EchoSource = TRUE;
int TraceScan = TRUE;


main( int argc, char * argv[] )
{ 
  char pgm[120]; /* source code file name */
  argc=2;
  if (argc != 2)
    { fprintf(stderr,"usage: %s <filename>\n",argv[0]);
      exit(1);
    }
 argv[1]="tt";

  strcpy(pgm,argv[1]) ;
  if (strchr (pgm, '.') == NULL)
     strcat(pgm,".tny");
  source = fopen(pgm,"r");
  if (source==NULL)
  { fprintf(stderr,"File %s not found\n",pgm);
    exit(1);
  }
  listing = stdout; /* send listing to screen */
  fprintf(listing,"\nTINY COMPILATION: %s\n",pgm);

  while (getToken()!=ENDFILE);
 // parse();

  fclose(source);
  return 0;
}