constant_array.hpp

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#ifndef CHIHAYA_CONSTANT_ARRAY_HPP
#define CHIHAYA_CONSTANT_ARRAY_HPP
 
#include "H5Cpp.h"
#include "ritsuko/ritsuko.hpp"
 
#include <vector>
#include <stdexcept>
#include <exception>
#include <string>
#include <cstdint>
#include <cstddef>
 
#include "utils_public.hpp"
#include "utils_type.hpp"
#include "utils_misc.hpp"
#include "utils_dimensions.hpp"
 
namespace chihaya {
 
inline ArrayDetails validate_constant_array(const H5::Group& group, const ritsuko::Version& version, [[maybe_unused]] const Options& options) {
    ArrayDetails output;
 
    try {
        auto dhandle = group.openDataSet("dimensions");
        auto dspace = dhandle.getSpace();
        if (dspace.getSimpleExtentNdims() != 1) {
            throw std::runtime_error("'dimensions' dataset should be 1-dimensional");
        }
        hsize_t size;
        dspace.getSimpleExtentDims(&size);
        if (size == 0) {
            throw std::runtime_error("'dimensions' dataset should have non-zero length");
        }
 
        if (version.lt(1, 1, 0)) {
            output.dimensions = load_non_negative_integer_vector_0_99<std::size_t>(dhandle, size);
        } else {
            if (ritsuko::hdf5::exceeds_integer_limit(dhandle, 64, false)) {
                throw std::runtime_error("datatype should fit inside a 64-bit unsigned integer");
            }
            output.dimensions = load_dimensions_from_uint64_contents<std::size_t>(dhandle, size);
        }
    } catch (...) {
        std::throw_with_nested(std::runtime_error("failed to validate 'dimensions'"));
    }
 
    try {
        auto vhandle = group.openDataSet("value");
        if (vhandle.getSpace().getSimpleExtentNdims() != 0) {
            throw std::runtime_error("'value' dataset should be a scalar");
        }
 
        if (version.lt(1, 1, 0)) {
            output.type = translate_type_0_99(vhandle.getTypeClass());
        } else {
            try {
                auto thandle = vhandle.openAttribute("type");
                auto type = read_scalar_string_attribute(thandle);
                output.type = translate_type_1_1(type);
                if (!options.details_only) {
                    check_type_1_1(vhandle, output.type);
                }
            } catch (...) {
                std::throw_with_nested(std::runtime_error("failed to validate the 'type' attribute"));
            }
        }
 
        if (!options.details_only) {
            validate_missing_placeholder(vhandle, version);
            if (vhandle.getTypeClass() == H5T_STRING) {
                ritsuko::hdf5::validate_scalar_string(vhandle);
            }
        }
    } catch (...) {
        std::throw_with_nested(std::runtime_error("failed to validate 'value'"));
    }
 
    return output;
}
 
}
 
#endif