/* fsaandnot.c 3/11/94.
 * calculates "and_not" (set-difference) of two finite state automata
 *
 * SYNOPSIS:  fsaandnot [-ip d/s[dr]] [-op d/s] [-silent] [-v] [-l/-h]
                filename1 filename2 outfilename
 *
 * Input is from filename1 and filename2, which should contain fsa's.
 * Output is to outfilename
 *
 * OPTIONS:
 * -ip d/s[dr]  input in dense or sparse format - dense is default
 * -op d/s      output in dense or sparse format - default is as in current
 *               value of table->printing_format, in the fsa.
 * -v           verbose
 * -silent      no diagnostics
 * -l/-h        large/huge hash-tables (for big examples)
 */

#include <stdio.h>
#include "defs.h"
#include "fsa.h"
#include "definitions.h"

static FILE *rfile, *wfile;

void  badusage_fsaandnot();

/* Functions defined in other files used in this file */
void  fsa_read();
fsa  *fsa_and_not();
void  fsa_print();
void  fsa_clear();
int   stringlen();
int   fsa_minimize();

main(argc, argv)
        int             argc;
        char           *argv[];
{ int arg;
  fsa fsa1, fsa2, *fsaandnot;
  char inf1[100], inf2[100], outf[100], fsaname1[100], fsaname2[100],
       tempfilename[100];
  storage_type ip_store = DENSE;
  int dr = 0;
  storage_type op_store = DENSE;


  setbuf(stdout,(char*)0);
  setbuf(stderr,(char*)0);

  inf1[0] = '\0';
  inf2[0] = '\0';
  outf[0] = '\0';
  arg = 1;
  while (argc > arg) {
    if (strcmp(argv[arg],"-ip")==0) {
      arg++;
      if (arg >= argc)
        badusage_fsaandnot();
      if (strcmp(argv[arg],"d")==0)
        ip_store = DENSE;
      else if (argv[arg][0] == 's') {
        ip_store = SPARSE;
        if (stringlen(argv[arg]) > 1)
          dr = atoi(argv[arg]+1);
      }
      else
        badusage_fsaandnot();
    }
    else if (strcmp(argv[arg],"-op")==0) {
      arg++;
      if (arg >= argc)
        badusage_fsaandnot();
      if (strcmp(argv[arg],"d")==0)
        op_store = DENSE;
      else if (strcmp(argv[arg],"s")==0)
        op_store = SPARSE;
      else
        badusage_fsaandnot();
    }
    else if (strcmp(argv[arg],"-silent")==0)
      kbm_print_level = 0;
    else if (strcmp(argv[arg],"-v")==0)
      kbm_print_level = 2;
    else if (strcmp(argv[arg],"-vv")==0)
      kbm_print_level = 3;
    else if (strcmp(argv[arg],"-l")==0)
      kbm_large = TRUE;
    else if (strcmp(argv[arg],"-h")==0)
      kbm_huge = TRUE;
    else {
       if (argv[arg][0] == '-')
         badusage_fsaandnot();
       if (strcmp(outf,""))
         badusage_fsaandnot();
       if (strcmp(inf1,"")==0)
         strcpy(inf1,argv[arg]);
       else if (strcmp(inf2,"")==0)
         strcpy(inf2,argv[arg]);
       else
         strcpy(outf,argv[arg]);
    }
    arg++;
  }
  if (stringlen(inf1)==0 || stringlen(inf1)==0 || stringlen(outf)==0)
    badusage_fsaandnot();

  if ((rfile = fopen(inf1,"r")) == 0) {
    fprintf(stderr,"Cannot open file %s.\n",inf1);
    exit(1);
  }
  fsa_read(rfile,&fsa1,ip_store,dr,0,TRUE,fsaname1);
  fclose(rfile);

  if ((rfile = fopen(inf2,"r")) == 0) {
    fprintf(stderr,"Cannot open file %s.\n",inf2);
    exit(1);
  }
  fsa_read(rfile,&fsa2,ip_store,dr,0,TRUE,fsaname2);
  fclose(rfile);
  
  strcpy(tempfilename,inf1);
  strcat(tempfilename,"temp_andnot_XXX");
  fsaandnot = fsa_and_not(&fsa1,&fsa2,op_store,TRUE,tempfilename);
  if (fsaandnot==0) exit(1);

  if (kbm_print_level>1)
    printf("  #Number of states of fsaandnot before minimisation = %d.\n",
        fsaandnot->states->size);
  if (fsa_minimize(fsaandnot)== -1) exit(1);
  if (kbm_print_level>1)
    printf("  #Number of states of fsaandnot after minimisation = %d.\n",
        fsaandnot->states->size);

  base_prefix(fsaname1);
  strcat(fsaname1,"_andnot");
  wfile = fopen(outf,"w");
  fsa_print(wfile,fsaandnot,fsaname1);
  fclose(wfile);

  if (kbm_print_level>0)
  printf("#\"AndNot\" fsa with %d states computed.\n",fsaandnot->states->size);

  fsa_clear(fsaandnot);
  tfree(fsaandnot);

  exit(0);
}
 
void
badusage_fsaandnot()
{
    fprintf(stderr,
      "Usage: fsaandnot [-ip d/s[dr]] [-op d/s] [-silent] [-v] [-l/-h]\n");
    fprintf(stderr,
      "       filename1 filename2 outfilename\n");
    exit(1);
}
