DBCFileLoader.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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 "Errors.h"
#include "Utilities/ByteConverter.h"
 
enum DbcFieldFormat
{
    FT_NA = 'x',                                            //not used or unknown, 4 byte size
    FT_NA_BYTE = 'X',                                       //not used or unknown, byte
    FT_STRING = 's',                                        //char*
    FT_FLOAT = 'f',                                         //float
    FT_INT = 'i',                                           //uint32
    FT_BYTE = 'b',                                          //uint8
    FT_SORT = 'd',                                          //sorted by this field, field is not included
    FT_IND = 'n',                                           //the same, but parsed to data
    FT_LOGIC = 'l',                                         //Logical (boolean)
    FT_SQL_PRESENT = 'p',                                   //Used in sql format to mark column present in sql dbc
    FT_SQL_ABSENT = 'a'                                     //Used in sql format to mark column absent in sql dbc
};
 
class TC_COMMON_API 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));
                }
 
                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);
 
        uint32 GetNumRows() const { return recordCount; }
        uint32 GetRowSize() const { return recordSize; }
        uint32 GetCols() const { return fieldCount; }
        uint32 GetOffset(size_t id) const { return (fieldsOffset != nullptr && id < fieldCount) ? fieldsOffset[id] : 0; }
        bool IsLoaded() const { return data != nullptr; }
        char* AutoProduceData(char const* fmt, uint32& count, char**& indexTable);
        char* AutoProduceStrings(char const* fmt, char* dataTable);
        static uint32 GetFormatRecordSize(const char * format, int32 * index_pos = nullptr);
    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