Class FixedArray

src/python/PyImath/PyImathFixedArray.h:89–825

template <class T>
class FixedArray
{
    T *     _ptr;
    size_t  _length;
    size_t  _stride;
    bool    _writable;

    // this handle optionally stores a shared_array to allocated array data
    // so that everything is freed properly on exit.
    boost::any _handle;

    boost::shared_array<size_t> _indices; // non-NULL iff I'm a masked reference
    size_t                      _unmaskedLength;


  public:
    typedef T   BaseType;

    FixedArray(T *ptr, Py_ssize_t length, Py_ssize_t stride = 1, bool writable = true)
        : _ptr(ptr), _length(length), _stride(stride), _writable(writable),
          _handle(), _unmaskedLength(0)
    {
        if (length < 0)
        {
          throw std::domain_error  ("Fixed array length must be non-negative");
        }
        if (stride <= 0)
        {
          throw std::domain_error  ("Fixed array stride must be positive");
        }
        // nothing
    }

    FixedArray(T *ptr, Py_ssize_t length, Py_ssize_t stride,
               boost::any handle, bool writable = true)
        : _ptr(ptr), _length(length), _stride(stride), _writable(writable),
          _handle(handle), _unmaskedLength(0)
    {
        if (_length < 0)
        {
            throw std::domain_error("Fixed array length must be non-negative");
        }
        if (stride <= 0)
        {
            throw std::domain_error("Fixed array stride must be positive");
        }
        // nothing
    }

    FixedArray(const T *ptr, Py_ssize_t length, Py_ssize_t stride = 1)
        : _ptr(const_cast<T *>(ptr)), _length(length), _stride(stride),
          _writable(false), _handle(), _unmaskedLength(0)
    {
        if (length < 0)
        {
            throw std::logic_error("Fixed array length must be non-negative");
        }
        if (stride <= 0)