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#ifndef DBCFILE_H
#define DBCFILE_H
#include <cassert>
#include <string>
class DBCFile
{
public:
DBCFile(const std::string &filename);
~DBCFile();
// Open database. It must be openened before it can be used.
bool open();
// Database exceptions
class Exception
{
public:
Exception(const std::string &message): message(message)
{ }
virtual ~Exception()
{ }
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:
float getFloat(size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<float*>(offset+field*4);
}
unsigned int getUInt(size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<unsigned int*>(offset+field*4);
}
int getInt(size_t field) const
{
assert(field < file.fieldCount);
return *reinterpret_cast<int*>(offset+field*4);
}
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(DBCFile &file, unsigned char *offset): file(file), offset(offset) {}
unsigned char *offset;
DBCFile &file;
friend class DBCFile;
friend class DBCFile::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(size_t id);
/// Get begin iterator over records
Iterator begin();
/// Get begin iterator over records
Iterator end();
/// Trivial
size_t getRecordCount() const { return recordCount;}
size_t getFieldCount() const { return fieldCount; }
size_t getMaxId();
private:
std::string filename;
size_t recordSize;
size_t recordCount;
size_t fieldCount;
size_t stringSize;
unsigned char *data;
unsigned char *stringTable;
};
#endif
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