Function CreateMetaData

src/Misc/numpy.hpp:122–159

}

inline void CreateMetaData(
    std::string& preamble, std::string& header,
    const std::string& descriptor, bool fortran_order,
    int n_dims, const int shape[])
{
    header = "{'descr': '";
    header.append(descriptor);
    if(fortran_order) {
        header.append("', 'fortran_order': True, ");
    } else {
        header.append("', 'fortran_order': False, ");
    }
    header.append("'shape': (");
    std::stringstream shape_stream;
    if(1 < n_dims) {
        for(int d=0; d<n_dims; ++d) {
            shape_stream << shape[d];
            if(d + 1 != n_dims) {
                shape_stream << ",";
            }
        }
    } else {
        shape_stream << shape[0] << ",";
    }
    shape_stream << "), }";
    header.append(shape_stream.str());
    const int to_padding = 16 - (10 + header.size() + 1) % 16;
    for(int m=0; m<to_padding; ++m) {
        header.push_back(' ');
    }
    header.push_back('\n');

    preamble = "\x93NUMPY";
    preamble.push_back((char)1);
    preamble.push_back((char)0);
    uint16_t header_length = detail::ReorderInteger((uint16_t)header.size());
    preamble.append(reinterpret_cast<char*>(&header_length), 2);
}

} // namespace detail