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#ifndef T_ARRAY2_H
#define T_ARRAY2_H
#include <cassert>
#include <algorithm>
namespace anl
{
template<typename T>
class TArray2D
{
public:
typedef T value_type;
typedef value_type* iterator;
typedef const value_type* const_iterator;
TArray2D(size_t width=1, size_t height=1) : width_(0), height_(0), data_(0)
{
resize(width, height);
}
TArray2D(const TArray2D<T>& a)
{
resize(a.width(), a.height());
std::copy(a.begin(), a.end(), data_);
}
TArray2D& operator = (const TArray2D<T>& a)
{
resize(a.width(), a.height());
std::copy(a.begin(), a.end(), data_);
return *this;
}
~TArray2D()
{
delete[] data_;
}
inline size_t width() const
{
return width_;
}
inline size_t height() const
{
return height_;
}
inline size_t size() const
{
return width_*height_;
}
inline size_t bytes() const
{
return size()*sizeof(value_type);
}
void fill(value_type val)
{
std::uninitialized_fill_n(data_, size(), val);
}
void swap(TArray2D<T>& a)
{
std::swap(width_, a.width_);
std::swap(height_, a.height_);
std::swap(data_, a.data_);
}
void resize(size_t width, size_t height)
{
size_t nelements=width*height;
assert(nelements>0);
if(data_!=0)
{
if(width==width_ && height==height_) return;
delete[] data_;
data_=0;
}
data_=new value_type[nelements];
width_=width;
height_=height;
}
inline const_iterator begin() const
{
return data_;
}
inline const_iterator end() const
{
return data_+size();
}
inline iterator begin()
{
return data_;
}
inline iterator end()
{
return data_+size();
}
inline const T& operator () (size_t i) const
{
return data_[checkedIndex(i)];
}
inline const T& operator () (size_t i, size_t j) const
{
return data_[checkedIndex(i,j)];
}
inline T& operator () (size_t i)
{
return data_[checkedIndex(i)];
}
inline T& operator () (size_t i, size_t j)
{
return data_[checkedIndex(i,j)];
}
inline const T* c_data() const
{
return data_;
}
inline T* c_data()
{
return data_;
}
private:
size_t checkedIndex(size_t i) const
{
assert(i<size());
return i;
}
size_t checkedIndex(size_t i, size_t j) const
{
size_t s=width_*i+j;
assert(s<size());
return s;
}
size_t width_, height_;
T* data_;
};
};
#endif
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