/*
 * Copyright (C) 2008-2017 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2011 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#define _CRT_SECURE_NO_DEPRECATE

#include "loadlib.h"
#include <cstdio>

u_map_fcc MverMagic = { {'R','E','V','M'} };

FileLoader::FileLoader()
{
    data = 0;
    data_size = 0;
    version = 0;
}

FileLoader::~FileLoader()
{
    free();
}

bool FileLoader::loadFile(HANDLE mpq, char* filename, bool log)
{
    free();
    HANDLE file;
    if (!SFileOpenFileEx(mpq, filename, SFILE_OPEN_PATCHED_FILE, &file))
    {
        if (log)
            printf("No such file %s\n", filename);
        return false;
    }

    data_size = SFileGetFileSize(file, NULL);
    data = new uint8[data_size];
    SFileReadFile(file, data, data_size, NULL/*bytesRead*/, NULL);
    if (prepareLoadedData())
    {
        SFileCloseFile(file);
        return true;
    }

    printf("Error loading %s\n", filename);
    SFileCloseFile(file);
    free();

    return false;
}

bool FileLoader::prepareLoadedData()
{
    // Check version
    version = (file_MVER *) data;
    if (version->fcc != MverMagic.fcc)
        return false;
    if (version->ver != FILE_FORMAT_VERSION)
        return false;
    return true;
}

void FileLoader::free()
{
    if (data) delete[] data;
    data = 0;
    data_size = 0;
    version = 0;
}