//user_ops.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "user_ops.h"
#include <sys/types.h>

size_t strcpy_safe(char* dst, const char* src, size_t size) {
        char *d = dst;
        const char *s = src;
        size_t n = size;

        /* Copy as many bytes as will fit */
        if (n != 0 && --n != 0) {
                do {
                        if ((*d++ = *s++) == 0)
                                break;
                } while (--n != 0);
        }

        /* Not enough room in dst, add NUL and traverse rest of src */
        if (n == 0) {
                if (size != 0)
                        *d = '\0';                /* NUL-terminate dst */
                while (*s++)
                        ;
        }

        return(s - src - 1);        /* count does not include NUL */

}

userdata* create_user(const char* name, const char* password, int ispremium) {
  userdata *user;

  if(name == NULL || password == NULL) return NULL;
  if (strlen(name) > 15 || strlen(password) > 15) {return NULL;}

  user = calloc(1,sizeof(userdata));
  user->ispremium = ispremium;

  strcpy_safe(user->username,name, 16);
  strcpy_safe(user->password,password, 16);

  return user;
}

//user_ops.h

typedef struct userdata {
  char username[16];
  int ispremium;
  char password[16];
} userdata;

size_t strcpy_safe(char* dst, const char* src, size_t size);
userdata* create_user(const char* name, const char* password, int ispremium);