rtbuf/rtbuf/gtk/stack.c

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• Hash : eeffae82
  Author : Thomas de Grivel
  Date : 2020-05-02T17:17:07
  

  rtbuf-gtk library menu
  

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• gtk/stack.c

• /*
   * Copyright 2020 Thomas de Grivel <thoxdg@gmail.com>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <assert.h>
  #include "stack.h"
  
  void stack_init (s_stack *s)
  {
    assert(s);
    s->head = 0;
    s->length = 0;
  }
  
  void stack_destroy (s_stack *s)
  {
    assert(s);
    list_delete_all(s->head);
    s->head = 0;
    s->length = 0;
  }
  
  void stack_push (s_stack *s, void *item)
  {
    assert(s);
    s->head = list_new(item, s->head);
    assert(s->head);
    s->length++;
  }
  
  void * stack_pop (s_stack *s)
  {
    void *item;
    assert(s);
    assert(s->length > 0);
    assert(s->head);
    item = s->head->item;
    s->head = s->head->next;
    s->length--;
    return item;
  }
  

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