php-armadillo/src/mapval.hh

//
// php-armadillo/mapval.hh
//
// @Author CismonX
//

#ifndef PHP_ARMA_MAPVAL_HH
#define PHP_ARMA_MAPVAL_HH

#include "php_arma.hh"

// Forward declarations.
namespace arma
{
    template <typename T>
    class SpMat_MapMat_val;

    template <typename T>
    class SpSubview_MapMat_val;
}

namespace php_arma
{
    template <typename T, bool IsSparse, bool IsSubview>
    struct mapval
    {
        using sp_mapval_t = std::conditional_t<IsSubview,
            arma::SpSubview_MapMat_val<T>, arma::SpMat_MapMat_val<T>>;

        using native_t = std::conditional_t<IsSparse, sp_mapval_t, T*>;

        friend void mapval_init();

        zend_always_inline
        static void set_val(zend_object *zobj, T val)
        {
            if constexpr (IsSparse) {
                *to_native_object<native_t>(zobj) = val;
            } else {
                **to_native_object<native_t>(zobj) = val;
            }
        }

        zend_always_inline
        static zend_object *create(native_t init_val)
        {
            if constexpr (IsSparse) {
                return object_create<native_t>(ce, [&init_val](native_t *obj) {
                    memcpy(obj, &init_val, sizeof(native_t));
                    return &handlers;
                });
            } else {
                return object_create<native_t>(ce, [init_val](native_t *obj) {
                    *obj = init_val;
                    return &handlers;
                });
            }
        }

        PHP_ARMA_CE_HANDLRES_DECLARE();

    private:
        static ZEND_NAMED_FUNCTION(val);
        static ZEND_NAMED_FUNCTION(setTo);
        
        static T get_val(zend_object*);
        
        static void ce_init(const char*, zend_class_entry*);

        PHP_ARMA_START_ME()
            PHP_ARMA_ME(val,   ZEND_ACC_PUBLIC)
            PHP_ARMA_ME(setTo, ZEND_ACC_PUBLIC)
        PHP_ARMA_END_ME();
    };

    template <typename T>
    using mapval_dense      = mapval<T, false, false>;

    template <typename T>
    using mapval_spmat      = mapval<T, true,  false>;

    template <typename T>
    using mapval_sp_subview = mapval<T, true,  true>;

    void mapval_init();

    inline zend_class_entry *mapval_ce;
    inline zend_class_entry *sp_mapval_ce;
    inline zend_class_entry *spsv_mapval_ce;
}

#endif // !PHP_ARMA_MAPVAL_HH