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/*
* This file is part of the AzerothCore 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 Affero General Public License as published by the
* Free Software Foundation; either version 3 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 Affero 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 DBCFILE_H
#define DBCFILE_H
#include <cassert>
#include <string>
class DBCFile
{
public:
DBCFile(std::string filename);
~DBCFile();
// Open database. It must be openened before it can be used.
bool open();
/// @todo: Add a close function?
// Database exceptions
class Exception
{
public:
Exception(std::string message): message(std::move(message))
{ }
virtual ~Exception() = default;
const std::string& getMessage() {return message;}
private:
std::string message;
};
//
class NotFound: public Exception
{
public:
NotFound(): Exception("Key was not found")
{ }
};
// Iteration over database
class Iterator;
class Record
{
public:
Record& operator= (const Record& r)
{
file = r.file;
offset = r.offset;
return *this;
}
[[nodiscard]] float getFloat(std::size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<float*>(offset + field * 4);
}
[[nodiscard]] unsigned int getUInt(std::size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<unsigned int*>(offset + (field * 4));
}
[[nodiscard]] int getInt(std::size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<int*>(offset + field * 4);
}
[[nodiscard]] unsigned char getByte(std::size_t ofs) const
{
assert(ofs < file.recordSize);
return *reinterpret_cast<unsigned char*>(offset + ofs);
}
[[nodiscard]] const char* getString(std::size_t field) const
{
assert(field < file.fieldCount);
std::size_t stringOffset = getUInt(field);
assert(stringOffset < file.stringSize);
//char * tmp = (char*)file.stringTable + stringOffset;
//unsigned char * tmp2 = file.stringTable + stringOffset;
return reinterpret_cast<char*>(file.stringTable + stringOffset);
}
private:
Record(DBCFile& file, unsigned char* offset): file(file), offset(offset) {}
DBCFile& file;
unsigned char* offset;
friend class DBCFile;
friend class Iterator;
};
/* Iterator that iterates over records */
class Iterator
{
public:
Iterator(DBCFile& file, unsigned char* offset):
record(file, offset) {}
/// Advance (prefix only)
Iterator& operator++()
{
record.offset += record.file.recordSize;
return *this;
}
/// Return address of current instance
Record const& operator*() const { return record; }
const Record* operator->() const
{
return &record;
}
/// Comparison
bool operator==(const Iterator& b) const
{
return record.offset == b.record.offset;
}
bool operator!=(const Iterator& b) const
{
return record.offset != b.record.offset;
}
private:
Record record;
};
// Get record by id
Record getRecord(std::size_t id);
/// Get begin iterator over records
Iterator begin();
/// Get begin iterator over records
Iterator end();
/// Trivial
[[nodiscard]] std::size_t getRecordCount() const { return recordCount;}
[[nodiscard]] std::size_t getFieldCount() const { return fieldCount; }
private:
std::string filename;
std::size_t recordSize;
std::size_t recordCount;
std::size_t fieldCount;
std::size_t stringSize;
unsigned char* data;
unsigned char* stringTable;
};
#endif
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