#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>

int detect(unsigned char* img, int width);

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

    if(argc != 2 )
    {
        printf("The number of arguments is not correct. \n ");
        return 1;
    }

    struct stat st;
    stat(argv[1], &st);

    buff = (char *) malloc(st.st_size);
    if (buff == NULL)
    {
        printf("Cannot allocate memory\n");
        return 1;
    }

    int handle = open(argv[1], O_RDONLY, 0);
    if (handle == -1) {
        printf("Cannot access file.\n");
        free(buff);
        return 1;
    }


    int n = read(handle, buff, st.st_size);

    int width = *(int *) (buff + 18);
    int height = *(int *) (buff + 22);
    short bpp = *(short *) (buff + 28);
	int dupa;
	printf("width = %d, height = %d bpp = %d\n", width , height, bpp );
    if (bpp == 24 && width = 320 && height = 2400)
    {
		dupa = detect(buff + 54, width);

    	printf("Done.\n");
    }
    else
    	printf("This bmp is not 24 bit depth. \n");


	printf("width = %d, height = %d dupa = %d\n", width , height, dupa );
    free(buff);

    close(handle);



    return 0;
}