reactos/irc/ArchBlackmann/auto_vector.h

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// auto_vector.h
// This file is (C) 2002-2004 Royce Mitchell III
// and released under the LGPL & BSD licenses
#ifndef AUTO_VECTOR_H
#define AUTO_VECTOR_H
#include <sys/types.h>
#include "verify.h"
#include "auto_ptr.h"
template<class T>
class auto_vector
{
public:
explicit auto_vector ( size_t capacity = 0 )
: _arr(0), _capacity(0), _end(0)
{
if ( capacity != 0 )
_arr = new auto_ptr<T>[capacity];
_capacity = capacity;
}
~auto_vector()
{
delete []_arr;
}
size_t size() const
{
return _end;
}
const auto_ptr<T>& operator [] ( size_t i ) const
{
ASSERT ( i < _end );
return _arr[i];
}
auto_ptr<T>& operator [] ( size_t i )
{
ASSERT ( i < _end );
return _arr[i];
}
void assign ( size_t i, auto_ptr<T>& p )
{
ASSERT ( i < _end );
_arr[i] = p;
}
void assign_direct ( size_t i, T * p )
{
ASSERT ( i < _end );
reserve ( i + 1 );
_arr[i].reset ( ptr );
}
void push_back ( auto_ptr<T>& p )
{
reserve ( _end + 1 );
_arr[_end++] = p;
}
auto_ptr<T>& back()
{
ASSERT ( _end != 0 );
return _arr[_end-1];
}
void push_back ( T * p )
{
reserve ( _end + 1 );
auto_ptr<T> tmp(p);
_arr[_end++] = tmp;
//GCC is pedantic, this is an error.
//_arr[_end++] = auto_ptr<T>(p);
}
auto_ptr<T> pop_back()
{
ASSERT ( _end != 0 );
if ( !_end )
{
auto_ptr<T> tmp((T*)0);
return tmp;
//GCC, this is an error.
//return auto_ptr<T>(NULL);
}
return _arr[--_end];
}
void resize ( size_t newSize )
{
ASSERT ( newSize >= 0 );
reserve ( newSize ); // make sure we have at least this much room
_end = newSize;
}
void reserve ( size_t reqCapacity )
{
if ( reqCapacity <= _capacity )
return;
size_t newCapacity = 2 * _capacity;
if ( reqCapacity > newCapacity )
newCapacity = reqCapacity;
// allocate new array
auto_ptr<T> * arrNew = new auto_ptr<T> [newCapacity];
// transfer all entries
for ( size_t i = 0; i < _capacity; ++i )
arrNew[i] = _arr[i];
_capacity = newCapacity;
// free old memory
delete[] _arr;
// substitute new array for old array
_arr = arrNew;
}
void remove ( size_t off )
{
size_t last = _end-1;
if ( off == last )
resize ( last );
else if ( off < last )
{
auto_ptr<T> tmp ( pop_back().release() );
_arr[off] = tmp;
}
}
//typedef const_auto_iterator<T> const_iterator;
//const_iterator begin () const { return _arr; }
//const_iterator end () const { return _arr + _end; }
private:
auto_ptr<T> *_arr;
size_t _capacity;
size_t _end;
};
#endif//AUTO_VECTOR_H