#ifndef TypedArrayBase_h
#define TypedArrayBase_h
#include "ArrayBuffer.h"
#include "ArrayBufferView.h"
namespace WebCore {
template <typename T>
class TypedArrayBase : public ArrayBufferView {
public:
T* data() const { return static_cast<T*>(baseAddress()); }
void set(TypedArrayBase<T>* array, unsigned offset, ExceptionCode& ec)
{
setImpl(array, offset * sizeof(T), ec);
}
void setRange(const T* data, size_t dataLength, unsigned offset, ExceptionCode& ec)
{
setRangeImpl(reinterpret_cast<const char*>(data), dataLength * sizeof(T), offset * sizeof(T), ec);
}
void zeroRange(unsigned offset, size_t length, ExceptionCode& ec)
{
zeroRangeImpl(offset * sizeof(T), length * sizeof(T), ec);
}
unsigned length() const
{
return m_length;
}
virtual unsigned byteLength() const
{
return m_length * sizeof(T);
}
protected:
TypedArrayBase(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
: ArrayBufferView(buffer, byteOffset)
, m_length(length)
{
}
template <class Subclass>
static PassRefPtr<Subclass> create(unsigned length)
{
RefPtr<ArrayBuffer> buffer = ArrayBuffer::create(length, sizeof(T));
if (!buffer.get())
return 0;
return create<Subclass>(buffer, 0, length);
}
template <class Subclass>
static PassRefPtr<Subclass> create(const T* array, unsigned length)
{
RefPtr<Subclass> a = create<Subclass>(length);
if (a)
for (unsigned i = 0; i < length; ++i)
a->set(i, array[i]);
return a;
}
template <class Subclass>
static PassRefPtr<Subclass> create(PassRefPtr<ArrayBuffer> buffer,
unsigned byteOffset,
unsigned length)
{
RefPtr<ArrayBuffer> buf(buffer);
if (!verifySubRange<T>(buf, byteOffset, length))
return 0;
return adoptRef(new Subclass(buf, byteOffset, length));
}
template <class Subclass>
PassRefPtr<Subclass> subarrayImpl(int start, int end) const
{
unsigned offset, length;
calculateOffsetAndLength(start, end, m_length, &offset, &length);
clampOffsetAndNumElements<T>(buffer(), m_byteOffset, &offset, &length);
return create<Subclass>(buffer(), offset, length);
}
unsigned m_length;
};
}
#endif // TypedArrayBase_h