unary_comparison.hpp

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#ifndef CHIHAYA_UNARY_COMPARISON_HPP
#define CHIHAYA_UNARY_COMPARISON_HPP
 
#include "H5Cpp.h"
#include "ritsuko/ritsuko.hpp"
 
#include <stdexcept>
#include <string>
 
#include "utils_public.hpp"
#include "utils_misc.hpp"
#include "utils_type.hpp"
#include "utils_nary.hpp"
 
namespace chihaya {
 
inline ArrayDetails validate_unary_comparison(const H5::Group& group, const ritsuko::Version& version, const Options& options) {
    auto seed_details = fetch_seed(group, "seed", version, options);
 
    if (!options.details_only) {
        auto method = load_scalar_string_dataset(group, "method");
        if (!is_valid_comparison_operation(method)) {
            throw std::runtime_error("unrecognized operation in 'method' (got '" + method + "')");
        }
 
        auto side = load_scalar_string_dataset(group, "side");
        if (side != "left" && side != "right") {
            throw std::runtime_error("'side' should be either 'left' or 'right' (got '" + side + "')");
        }
 
        // Checking the value.
        auto vhandle = group.openDataSet("value");
        try {
            ArrayType val_type;
            if (version.lt(1, 1, 0)) {
                val_type = translate_type_0_99(vhandle.getTypeClass());
            } else {
                auto type = load_scalar_string_attribute(vhandle, "type");
                val_type = translate_type_1_1(type);
                check_type_1_1(vhandle, val_type);
            }
            if ((val_type == STRING) != (seed_details.type == STRING)) {
                throw std::runtime_error("both or neither of 'seed' and 'value' should contain strings");
            }
 
            validate_missing_placeholder(vhandle, version);
 
            size_t ndims = vhandle.getSpace().getSimpleExtentNdims();
            if (ndims == 0) { // scalar operation.
                if (vhandle.getTypeClass() == H5T_STRING) {
                    ritsuko::hdf5::validate_scalar_string(vhandle);
                }
 
            } else if (ndims == 1) {
                hsize_t extent;
                vhandle.getSpace().getSimpleExtentDims(&extent);
                check_unary_along(group, version, seed_details.dimensions, extent);
                if (vhandle.getTypeClass() == H5T_STRING) {
                    ritsuko::hdf5::validate_1d_strings(vhandle, extent);
                }
 
            } else { 
                throw std::runtime_error("dataset should be scalar or 1-dimensional");
            }
 
        } catch (std::exception& e) {
            throw std::runtime_error("failed to validate 'value'; " + std::string(e.what()));
        }
    }
 
    seed_details.type = BOOLEAN;
    return seed_details;
}
 
}
 
#endif