dbcfile.cpp

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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/>.
 */
 
#include "dbcfile.h"
#include "mpq_libmpq.h"
 
DBCFile::DBCFile(const std::string& filename):
    filename(filename), recordSize(0), recordCount(0), fieldCount(0), stringSize(0), data(nullptr), stringTable(nullptr)
{
 
}
 
bool DBCFile::open()
{
    MPQFile f(filename.c_str());
    char header[4];
    unsigned int na,nb,es,ss;
 
    if(f.read(header,4)!=4)                                 // Number of records
        return false;
 
    if(header[0]!='W' || header[1]!='D' || header[2]!='B' || header[3]!='C')
        return false;
 
    if(f.read(&na,4)!=4)                                    // Number of records
        return false;
    if(f.read(&nb,4)!=4)                                    // Number of fields
        return false;
    if(f.read(&es,4)!=4)                                    // Size of a record
        return false;
    if(f.read(&ss,4)!=4)                                    // String size
        return false;
 
    recordSize = es;
    recordCount = na;
    fieldCount = nb;
    stringSize = ss;
    if(fieldCount*4 != recordSize)
        return false;
 
    data = new unsigned char[recordSize*recordCount+stringSize];
    stringTable = data + recordSize*recordCount;
 
    size_t data_size = recordSize*recordCount+stringSize;
    if(f.read(data,data_size)!=data_size)
        return false;
    f.close();
    return true;
}
DBCFile::~DBCFile()
{
    delete [] data;
}
 
DBCFile::Record DBCFile::getRecord(size_t id)
{
    assert(data);
    return Record(*this, data + id*recordSize);
}
 
size_t DBCFile::getMaxId()
{
    assert(data);
 
    size_t maxId = 0;
    for(size_t i = 0; i < getRecordCount(); ++i)
    {
        if(maxId < getRecord(i).getUInt(0))
            maxId = getRecord(i).getUInt(0);
    }
    return maxId;
}
 
DBCFile::Iterator DBCFile::begin()
{
    assert(data);
    return Iterator(*this, data);
}
DBCFile::Iterator DBCFile::end()
{
    assert(data);
    return Iterator(*this, stringTable);
}