main.c

/****************************************************/
/* File: main.c                                     */
/* Main program for C- compiler                     */
/* Max Forasteiro                                   */
/****************************************************/

#include "globals.h"

/* set NO_PARSE to TRUE to get a scanner-only compiler */
#define NO_PARSE FALSE
/* set NO_ANALYZE to TRUE to get a parser-only compiler */
#define NO_ANALYZE FALSE

/* set NO_CODE to TRUE to get a compiler that does not
 * generate code
 */
#define NO_CODE TRUE

#include "util.h"
#if NO_PARSE
#include "scan.h"
#else
#include "parse.h"
#if !NO_ANALYZE
#include "analyze.h"
#if !NO_CODE
#include "cgen.h"
#endif
#endif
#endif

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

/* allocate and set tracing flags */
int EchoSource   = FALSE;
int TraceScan    = FALSE;
int TraceParse   = FALSE;
int TraceAnalyze = TRUE;
int TraceCode    = FALSE;

int Error        = FALSE;

int main(int argc, char *argv[]) {
  TreeNode *syntaxTree;
  char pgm[120]; /* source code file name */
  if (argc != 2) {
    fprintf(stderr, "usage: %s <filename>\n", argv[0]);
    exit(1);
  }
  strcpy(pgm, argv[1]) ;
  if (strchr(pgm, '.') == NULL)
    strcat(pgm, ".cminus");
  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, "\nC- COMPILATION: %s\n", pgm);
#if NO_PARSE
  while (getToken() != ENDFILE);
#else
  syntaxTree = parse();
  if (TraceParse) {
    fprintf(listing, "\nSyntax tree:\n");
    printTree(syntaxTree);
  }
#if !NO_ANALYZE
  if (!Error) {
    if (TraceAnalyze)
      fprintf(listing, "\nBuilding Symbol Table...\n");
    buildSymtab(syntaxTree);
    if (TraceAnalyze)
      fprintf(listing, "\nChecking Types...\n");
    typeCheck(syntaxTree);
    if (TraceAnalyze)
      fprintf(listing, "\nType Checking Finished\n");
  }
#if !NO_CODE
  if (!Error) {
    char * codefile;
    int fnlen = strcspn(pgm, ".");
    codefile = (char *) calloc(fnlen + 4, sizeof(char));
    strncpy(codefile, pgm, fnlen);
    strcat(codefile, ".tm");
    code = fopen(codefile, "w");
    if (code == NULL) {
      printf("Unable to open %s\n", codefile);
      exit(1);
    }
    codeGen(syntaxTree, codefile);
    fclose(code);
  }
#endif
#endif
#endif
  fclose(source);
  return 0;
}