/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*======
This file is part of PerconaFT.


Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2,
    as published by the Free Software Foundation.

    PerconaFT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.

----------------------------------------

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License, version 3,
    as published by the Free Software Foundation.

    PerconaFT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
======= */

#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."

// test sub block compression and decompression

#include <toku_portability.h>
#include "test.h"
#include <stdio.h>
#include <errno.h>
#include <string.h>

#include "serialize/sub_block.h"

static void
test_sub_block_compression(void *buf, int total_size, int my_max_sub_blocks, int n_cores, enum toku_compression_method method) {
    if (verbose)
        printf("%s:%d %d %d\n", __FUNCTION__, __LINE__, total_size, my_max_sub_blocks);

    int r;

    int sub_block_size, n_sub_blocks;
    r = choose_sub_block_size(total_size, my_max_sub_blocks, &sub_block_size, &n_sub_blocks);
    assert(r == 0);
    if (verbose)
        printf("%s:%d %d %d\n", __FUNCTION__, __LINE__, sub_block_size, n_sub_blocks);

    struct sub_block sub_blocks[n_sub_blocks];
    set_all_sub_block_sizes(total_size, sub_block_size, n_sub_blocks, sub_blocks);

    size_t cbuf_size_bound = get_sum_compressed_size_bound(n_sub_blocks, sub_blocks, method);
    void *cbuf = toku_malloc(cbuf_size_bound);
    assert(cbuf);

    size_t cbuf_size = compress_all_sub_blocks(n_sub_blocks, sub_blocks, (char*)buf, (char*)cbuf, n_cores, NULL, method);
    assert(cbuf_size <= cbuf_size_bound);

    void *ubuf = toku_malloc(total_size);
    assert(ubuf);

    r = decompress_all_sub_blocks(n_sub_blocks, sub_blocks, (unsigned char*)cbuf, (unsigned char*)ubuf, n_cores, NULL);
    assert(r == 0);

    assert(memcmp(buf, ubuf, total_size) == 0);

    toku_free(ubuf);
    toku_free(cbuf);
}

static void
set_random(void *buf, int total_size) {
    char *bp = (char *) buf;
    for (int i = 0; i < total_size; i++)
        bp[i] = random();
}

static void
run_test(int total_size, int n_cores, enum toku_compression_method method) {
    void *buf = toku_malloc(total_size);
    assert(buf);

    for (int my_max_sub_blocks = 1; my_max_sub_blocks <= max_sub_blocks; my_max_sub_blocks++) {
        memset(buf, 0, total_size);
        test_sub_block_compression(buf, total_size, my_max_sub_blocks, n_cores, method);

        set_random(buf, total_size);
        test_sub_block_compression(buf, total_size, my_max_sub_blocks, n_cores, method);
    }

    toku_free(buf);
}
int
test_main (int argc, const char *argv[]) {
    int n_cores = 1;
    int e = 1;

    for (int i = 1; i < argc; i++) {
        const char *arg = argv[i];
        if (strcmp(arg, "-v") == 0 || strcmp(arg, "--verbose") == 0) {
            verbose++;
            continue;
        }
        if (strcmp(arg, "-n") == 0) {
            if (i+1 < argc) {
                n_cores = atoi(argv[++i]);
                continue;
            }
        }
        if (strcmp(arg, "-e") == 0) {
            if (i+1 < argc) {
                e = atoi(argv[++i]);
                continue;
            }
        }
    }

    for (int total_size = 256*1024; total_size <= 4*1024*1024; total_size *= 2) {
        for (int size = total_size - e; size <= total_size + e; size++) {
            run_test(size, n_cores, TOKU_NO_COMPRESSION);
            run_test(size, n_cores, TOKU_ZLIB_METHOD);
            run_test(size, n_cores, TOKU_ZLIB_WITHOUT_CHECKSUM_METHOD);
            run_test(size, n_cores, TOKU_QUICKLZ_METHOD);
            run_test(size, n_cores, TOKU_LZMA_METHOD);
        }
    }

    return 0;
}