example on how to validate if a dynamic array of chars is empty

empty_string.c

#include <stdio.h>
#include <string.h>

int empty_string(char * str) {
  return(str == NULL || strlen(str) == 0 );
}

int main(int argc, char **argv) {

  char * ch = NULL;

  printf("empty? %d\n", empty_string(ch));

  return(0);
}