#include <stdio.h>
#include <stdlib.h>


int main(int argc, char *argv[])
{
    // check if arg count is 2
    if (argc != 2)
    {
        printf("Usage: ./recover image\n");
        return 1;
    }

    // create a pointer to open the memory card file
    FILE *inptr = fopen("card.raw", "r");
    // check if pointer is Null, if it is then return 1
    if (inptr == NULL)
    {
        printf("this file is empty\n");
        return 1;
    }

    FILE *imgOut = NULL;

    char filename[10];

    int count = 0;
    // create buffer array
    unsigned char buffer[512];


    do
    {
        // read in buffer
        fread(&buffer, 512, 1, inptr);


       // printf("this is it\n");
        // check if the start of new jpeg image
        if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)
        {
            printf("this is a jpeg\n");
            sprintf(filename, "test.jpg");
            imgOut = fopen(filename, "w");

            if (imgOut == NULL)
            {
                printf("img is NULL\n");
                fclose(inptr);
                return 1;
            }

            // if it's the very first jpeg
            if (count == 0)
            {
                //img = fopen(filename, "w");
                fwrite(&buffer, 512, 1, imgOut);
                //count++;

            }



        }
        else if (imgOut)
        {

            fwrite(&buffer, 512, 1, imgOut);
        }




    }
    while (!feof(inptr));

    fclose(inptr);
    fclose(imgOut);

    return 0;
}