open.hpp

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#ifndef RITSUKO_HDF5_VLS_OPEN_HPP
#define RITSUKO_HDF5_VLS_OPEN_HPP
 
#include "H5Cpp.h"
 
#include <string>
#include <stdexcept>
 
#include "../open.hpp"
#include "../get_name.hpp"
#include "Pointer.hpp"
 
namespace ritsuko {
 
namespace hdf5 {
 
namespace vls {
 
inline H5::DataSet open_pointers(const H5::Group& handle, const char* name, size_t offset_precision, size_t length_precision) {
    auto dhandle = open_dataset(handle, name);
    if (dhandle.getTypeClass() != H5T_COMPOUND) {
        throw std::runtime_error("expected a compound datatype for a VLS pointer dataset at '" + get_name(dhandle) + "'");
    }
    try {
        validate_pointer_datatype(dhandle.getCompType(), offset_precision, length_precision);
    } catch (std::exception& e) {
        throw std::runtime_error("incorrect type for VLS pointer dataset at '" + get_name(dhandle) + "; " + std::string(e.what()));
    }
    return dhandle;
}
 
inline H5::DataSet open_heap(const H5::Group& handle, const char* name) {
    auto dhandle = open_dataset(handle, name);
    if (dhandle.getTypeClass() != H5T_INTEGER) {
        throw std::runtime_error("expected an integer datatype for the VLS heap at '" + get_name(dhandle) + "'");
    }
    if (exceeds_integer_limit(dhandle.getIntType(), 8, false)) {
        throw std::runtime_error("expected 8-bit unsigned integers for the VLS heap at '" + get_name(dhandle) + "'");
    }
    if (dhandle.getSpace().getSimpleExtentNdims() != 1) {
        throw std::runtime_error("expected a 1-dimensional dataset for the VLS heap at '" + get_name(dhandle) + "'");
    }
    return dhandle;
}
 
}
 
}
 
}
 
#endif