TrinityCore/src/server/shared/DataStores/DBCFileLoader.h

/*
 * Copyright (C) 2008-2015 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 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/>.
 */

#ifndef DBC_FILE_LOADER_H
#define DBC_FILE_LOADER_H

#include "Define.h"
#include "Utilities/ByteConverter.h"
#include <cassert>

class DBCFileLoader
{
    public:
        DBCFileLoader();
        ~DBCFileLoader();

        bool Load(const char *filename, const char *fmt);

        class Record
        {
            public:
                float getFloat(size_t field) const
                {
                    assert(field < file.fieldCount);
                    float val = *reinterpret_cast<float*>(offset + file.GetOffset(field));
                    EndianConvert(val);
                    return val;
                }
                uint32 getUInt(size_t field) const
                {
                    assert(field < file.fieldCount);
                    uint32 val = *reinterpret_cast<uint32*>(offset + file.GetOffset(field));
                    EndianConvert(val);
                    return val;
                }
                uint8 getUInt8(size_t field) const
                {
                    assert(field < file.fieldCount);
                    return *reinterpret_cast<uint8*>(offset + file.GetOffset(field));
                }
                uint64 getUInt64(size_t field) const
                {
                    assert(field < file.fieldCount);
                    return *reinterpret_cast<uint64*>(offset + file.GetOffset(field));
                }

                const char *getString(size_t field) const
                {
                    assert(field < file.fieldCount);
                    size_t stringOffset = getUInt(field);
                    assert(stringOffset < file.stringSize);
                    return reinterpret_cast<char*>(file.stringTable + stringOffset);
                }

            private:
                Record(DBCFileLoader &file_, unsigned char *offset_): offset(offset_), file(file_) { }
                unsigned char* offset;
                DBCFileLoader& file;

                friend class DBCFileLoader;

        };

        // Get record by id
        Record getRecord(size_t id);
        /// Get begin iterator over records

        uint32 GetNumRows() const { return recordCount; }
        uint32 GetRowSize() const { return recordSize; }
        uint32 GetCols() const { return fieldCount; }
        uint32 GetOffset(size_t id) const { return (fieldsOffset != NULL && id < fieldCount) ? fieldsOffset[id] : 0; }
        bool IsLoaded() const { return data != NULL; }
        char* AutoProduceData(const char* fmt, uint32& count, char**& indexTable, uint32 sqlRecordCount, uint32 sqlHighestIndex, char *& sqlDataTable);
        char* AutoProduceStrings(const char* fmt, char* dataTable);
        static uint32 GetFormatRecordSize(const char * format, int32 * index_pos = NULL);
    private:

        uint32 recordSize;
        uint32 recordCount;
        uint32 fieldCount;
        uint32 stringSize;
        uint32 *fieldsOffset;
        unsigned char *data;
        unsigned char *stringTable;

        DBCFileLoader(DBCFileLoader const& right) = delete;
        DBCFileLoader& operator=(DBCFileLoader const& right) = delete;
};
#endif