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#ifndef CORE_LIB_ARRAY_VIEW_H
#define CORE_LIB_ARRAY_VIEW_H
#include "exception.h"
namespace Slang
{
template<typename T>
class ArrayView
{
private:
T * _buffer;
int _count;
int stride;
public:
T* begin() const
{
return _buffer;
}
T* end() const
{
return (T*)((char*)_buffer + _count*stride);
}
public:
ArrayView()
{
_buffer = 0;
_count = 0;
}
ArrayView(const T & singleObj)
{
SetData((T*)&singleObj, 1, sizeof(T));
}
ArrayView(T * buffer, int count)
{
SetData(buffer, count, sizeof(T));
}
ArrayView(void * buffer, int count, int _stride)
{
SetData(buffer, count, _stride);
}
void SetData(void * buffer, int count, int _stride)
{
this->_buffer = (T*)buffer;
this->_count = count;
this->stride = _stride;
}
inline int GetCapacity() const
{
return _count;
}
inline int Count() const
{
return _count;
}
inline T & operator [](int id) const
{
#if _DEBUG
if (id >= _count || id < 0)
throw IndexOutofRangeException("Operator[]: Index out of Range.");
#endif
return *(T*)((char*)_buffer+id*stride);
}
inline T* Buffer() const
{
return _buffer;
}
template<typename T2>
int IndexOf(const T2 & val) const
{
for (int i = 0; i < _count; i++)
{
if (*(T*)((char*)_buffer + i*stride) == val)
return i;
}
return -1;
}
template<typename T2>
int LastIndexOf(const T2 & val) const
{
for (int i = _count - 1; i >= 0; i--)
{
if (*(T*)((char*)_buffer + i*stride) == val)
return i;
}
return -1;
}
template<typename Func>
int FindFirst(const Func & predicate) const
{
for (int i = 0; i < _count; i++)
{
if (predicate(_buffer[i]))
return i;
}
return -1;
}
template<typename Func>
int FindLast(const Func & predicate) const
{
for (int i = _count - 1; i >= 0; i--)
{
if (predicate(_buffer[i]))
return i;
}
return -1;
}
};
template<typename T>
ArrayView<T> MakeArrayView(const T & obj)
{
return ArrayView<T>(obj);
}
template<typename T>
ArrayView<T> MakeArrayView(T * buffer, int count)
{
return ArrayView<T>(buffer, count);
}
}
#endif
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