/*
 * zeroes.c -- component to provide zeroes on demand.
 */

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

#include "noisebox.h"

// static int do_readdir(const char *path, void *buffer,
//             fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) {
//     filler(buffer, ".", NULL, 0);
//     filler(buffer, "..", NULL, 0);
// }

static int do_getattr(const char *path, struct stat *st) {
}


static int get_noise(size_t n, off_t offset, char* buf,
        struct fuse_file_info *fi) {
    printf("getting zeroes: %i:%i\n", n, offset);
    char *tmp = calloc(n, sizeof(char));
    memcpy(buf, tmp, n);
    free(tmp);
    printf("zeroes obtained\n");
    return n;
}

Noiser* zero_init(void) {
    Noiser* n = malloc(sizeof(Noiser));
    n->name = "zero";
    n->state = NULL;
    n->get_noise = get_noise;

    // manually keep track of file count for now.
    n->noisefile_count = 3;
    n->files = malloc(sizeof(NoiseFile *) * n->noisefile_count);

    n->files[0] = malloc(sizeof(NoiseFile));
    n->files[0]->name = "1M";
    n->files[0]->size = 1ULL<<20;

    n->files[1] = malloc(sizeof(NoiseFile));
    n->files[1]->name = "1G";
    n->files[1]->size = 1ULL<<30;

    n->files[2] = malloc(sizeof(NoiseFile));
    n->files[2]->name = "100G";
    n->files[2]->size = 100 * (1ULL<<30);

    return n;
}