#ifndef devwrite__c
#define devwrite__c

#include <linux/init.h>           // Macros used to mark up functions e.g. __init __exit
#include <linux/module.h>         // Core header for loading LKMs into the kernel
#include <linux/device.h>         // Header to support the kernel Driver Model
#include <linux/kernel.h>         // Contains types, macros, functions for the kernel
#include <linux/fs.h>             // Header for the Linux file system support
#include <asm/uaccess.h>          // Required for the copy to user function
#include <linux/slab.h>

#include "outpmodes.c"

/** @brief This function is called whenever the device is being written to from user space i.e.
 *  data is sent to the device from the user. The data is copied to the message[] array in this
 *  LKM using the sprintf() function along with the length of the string.
 *  @param filep A pointer to a file object
 *  @param buffer The buffer to that contains the string to write to the device
 *  @param len The length of the array of data that is being passed in the const char buffer
 *  @param offset The offset if required
 */
static ssize_t dev_write(struct file *filep, const char *buffer, size_t len, loff_t *offset){
   //sprintf(message, "%s(%zu letters)", buffer, len);   // appending received string with its length
   char   tmpMsg[256] = {0};
   copy_from_user(tmpMsg,buffer, len);
   if(strncmp(tmpMsg, forward, strlen(forward)) == 0){
       direction = 1;
       printk(KERN_INFO "Forward direction");
       return strlen(tmpMsg);
   } else if(strncmp(tmpMsg, back, strlen(back)) == 0){
       direction = -1;
       printk(KERN_INFO "Back direction");
       return strlen(tmpMsg);
   } else if(strncmp(tmpMsg, delete, strlen(delete)) == 0){
       printk(KERN_INFO "Delete");
       message[0] = 0;
       size_of_message = 0;
       return strlen(tmpMsg);
   }
   strcpy(message, tmpMsg);
   size_of_message = len;                 // store the length of the stored message
   *offset += len;
   printk(KERN_INFO "EBBChar: Received %zu characters from the user\n", len);
   return len;
}
#endif