/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
// test sub block compression and decompression
#ident "$Id$"
/*
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  This program is free software; you can redistribute it and/or modify
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      * Redistributions of source code must retain this COPYING
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COPYRIGHT NOTICE:

  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  This program 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.

UNIVERSITY PATENT NOTICE:

  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
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PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.
  This software is covered by US Patent No. 8,489,638.

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*/

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."

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

#include "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;
}
