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Datei: idents.c Sprache: C

//------------------------------------------------------------------------------
//
//  modifications by CO3
//
//------------------------------------------------------------------------------
//  Nlmod() statt Nl() wegen der Zailenzahl
//
/*
* ACCENT
*
* A Compiler Compiler for the Entire Class of Context-Free Languages
*
* Copyright (C) 1999  Friedrich Wilhelm Schroeer
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/*
* sets.c
*/

#include "sets.h"

#define PUBLIC
#define PRIVATE static

struct SET {
  int head;
  set tail;
};

PUBLIC int changed;

PUBLIC void print_set(s)
set s;
  {
  set p;

  p = s;
  printf("{");
  while (p) {
    printf(" %d", p->head);
    p = p->tail;
  }
  printf(" }");
}

PUBLIC emit_set(s)
set s;
  {
  set p;

  p = s;
  Put("{");
  while (p) {
    extern TokenNumberToString();
    char *str;
    Put(" ");
    TokenNumberToString(p->head, &str);
    Put("'");
    Put(str);
    Put("'");
    p = p->tail;
  }
  Put(" }");
  }

PUBLIC write_set(n, s)
int n;
set s;
  {
  set p;

  p = s;
  while (p) {
    Put("TABLE[");
    PutI(n);
    Put("][");
    PutI(p->head);
    Put("] = 1;");
    Nlmod();
    p = p->tail;
}
}

PUBLIC set empty_set ()
  {
  return 0;
}

PUBLIC void into_set_include_elem (ref_s, e)
set *ref_s;
int e;
  {
  set p;

  /*
  print_set(*ref_s);
  printf(" + %d\n", e);
  */

  p = *ref_s;
  while(p) {
    if (p->head == e) return;
    p = p->tail;
  }

  p = (set) malloc (sizeof (struct SET));
  if (! p) {
    printf("running out of memory\n");
    exit(1);
  }
  p->head = e;
  p->tail = *ref_s;
  *ref_s = p;

  changed = 1;
}

PUBLIC void into_set_include_set (ref_s, x)
set *ref_s, x;
  {
  set p;
  p = x;
  while(p) {
    into_set_include_elem(ref_s, p->head);
    p = p->tail;
}
}

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