main.c

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/* main.c<2> --- 
 * 
 * Filename: main.c<2>
 * Description: 
 * Author: Bryce Himebaugh
 * Maintainer: 
 * Created: Mon Oct 16 15:12:40 2006
 * Version: 
 * Last-Updated: 
 *           By: 
 *     Update #: 0
 * Keywords: 
 * Compatibility: 
 * 
 */

/* Commentary: 
 * 
 * 
 * 
 */

/* Change log:
 * 
 * 
 */

/* 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, 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; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* Code: */
#include "queue.h"

void init_queue(queue_t *buf) {
  buf->head=0;
  buf->tail=0;
}

int enqueue (queue_t *buf, char data) {
  int return_val=0;
  if ((((buf->head)+1)&0x7F)!=buf->tail) {
    buf->buffer[buf->head]=data;   
    buf->head=((buf->head)+1)&0x7f;
    return_val=1;
  }
  else {
    return_val=0;
  }
  return (return_val);
}

char dequeue (queue_t *buf) {
  char return_val=0;
  if (buf->tail!=buf->head) {
    return_val=buf->buffer[buf->tail];
    buf->tail=((buf->tail)+1)&0x7f;
  }
  return(return_val);
}

/* main.c<2> ends here */

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