/*  Fluent Bit

 *  ==========

 *  Copyright (C) 2019-2022 The Fluent Bit Authors

 *  Copyright (C) 2015-2018 Treasure Data Inc.

 *

 *  Licensed under the Apache License, Version 2.0 (the "License");

 *  you may not use this file except in compliance with the License.

 *  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *  Unless required by applicable law or agreed to in writing, software

 *  distributed under the License is distributed on an "AS IS" BASIS,

 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *  See the License for the specific language governing permissions and

 *  limitations under the License.

 */

#include <stdint.h>

#include <string.h>

#include <stdlib.h>

#include <assert.h>

#include <fluent-bit/flb_info.h>

#include <fluent-bit/flb_fstore.h>

#include <fluent-bit/flb_mem.h>

#include <fluent-bit/flb_compat.h>

#include <chunkio/chunkio.h>

#include <chunkio/cio_utils.h>

#include <sys/types.h>

#include <sys/stat.h>

#define FSF_STORE_PATH "/tmp/flb-fstore"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    int ret;

    void *out_buf;

    size_t out_size;

    struct stat st_data;

    struct flb_fstore *fs;

    struct flb_fstore_stream *st;

    struct flb_fstore_file *fsf;

    /* Set flb_malloc_mod to be fuzzer-data dependent */

    if (size < 4) {

        return 0;

    }

    flb_malloc_p = 0;

    flb_malloc_mod = *(int*)data;

    data += 4;

    size -= 4;

    /* Avoid division by zero for modulo operations */

    if (flb_malloc_mod == 0) {

        flb_malloc_mod = 1;

    }

    cio_utils_recursive_delete(FSF_STORE_PATH);

    fs = flb_fstore_create(FSF_STORE_PATH, FLB_FSTORE_FS);

    if (fs == NULL) {

        return 0;

    }

    st = flb_fstore_stream_create(fs, "abc");

    if (st != NULL) {

        fsf = flb_fstore_file_create(fs, st, "example.txt", size);

        if (fsf != NULL) {

            ret = flb_fstore_file_append(fsf, data, size);

            if (ret == 0) {

                ret = flb_fstore_file_content_copy(fs, fsf, &out_buf, &out_size);

                if (ret == 0) {

                    assert(memcmp(out_buf, data, size) == 0);

                }

                flb_free(out_buf);

            }

        }

    }

    flb_fstore_dump(fs);

    flb_fstore_destroy(fs);

    return 0;

}