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#include <emscripten/bind.h>
#ifdef USE_CXA_DEMANGLE
#include <../lib/libcxxabi/include/cxxabi.h>
#endif
#include <list>
#include <vector>
#include <typeinfo>
#include <algorithm>
#include <emscripten/emscripten.h>
#include <climits>
#include <limits>

using namespace emscripten;

extern "C" {
    const char* __attribute__((used)) __getTypeName(const std::type_info* ti) {
        if (has_unbound_type_names) {
#ifdef USE_CXA_DEMANGLE
            int stat;
            char* demangled = abi::__cxa_demangle(ti->name(), NULL, NULL, &stat);
            if (stat == 0 && demangled) {
                return demangled;
            }

            switch (stat) {
                case -1:
                    return strdup("<allocation failure>");
                case -2:
                    return strdup("<invalid C++ symbol>");
                case -3:
                    return strdup("<invalid argument>");
                default:
                    return strdup("<unknown error>");
            }
#else
            return strdup(ti->name());
#endif
        } else {
            char str[80];
            sprintf(str, "%p", ti);
            return strdup(str);
        }
    }
}

namespace {
    template<typename T>
    static void register_integer(const char* name) {
        using namespace internal;
        _embind_register_integer(TypeID<T>::get(), name, sizeof(T), std::numeric_limits<T>::min(), std::numeric_limits<T>::max());
    }

    template<typename T>
    static void register_float(const char* name) {
        using namespace internal;
        _embind_register_float(TypeID<T>::get(), name, sizeof(T));
    }


    // matches typeMapping in embind.js
    enum TypedArrayIndex {
        Int8Array,
        Uint8Array,
        Int16Array,
        Uint16Array,
        Int32Array,
        Uint32Array,
        Float32Array,
        Float64Array,
    };

    template<typename T>
    constexpr TypedArrayIndex getTypedArrayIndex() {
        static_assert(
            (std::is_floating_point<T>::value && (sizeof(T) == 4 || sizeof(T) == 8)) ||
            (std::is_integral<T>::value && (sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4)),
            "type does not map to a typed array");
        return std::is_floating_point<T>::value
            ? (sizeof(T) == 4
               ? Float32Array
               : Float64Array)
            : (sizeof(T) == 1
               ? (std::is_signed<T>::value ? Int8Array : Uint8Array)
               : (sizeof(T) == 2
                  ? (std::is_signed<T>::value ? Int16Array : Uint16Array)
                  : (std::is_signed<T>::value ? Int32Array : Uint32Array)));
    }

    template<typename T>
    static void register_memory_view(const char* name) {
        using namespace internal;
        _embind_register_memory_view(TypeID<memory_view<T>>::get(), getTypedArrayIndex<T>(), name);
    }
}

EMSCRIPTEN_BINDINGS(native_and_builtin_types) {
    using namespace emscripten::internal;

    _embind_register_void(TypeID<void>::get(), "void");
    
    _embind_register_bool(TypeID<bool>::get(), "bool", sizeof(bool), true, false);

    register_integer<char>("char");
    register_integer<signed char>("signed char");
    register_integer<unsigned char>("unsigned char");
    register_integer<signed short>("short");
    register_integer<unsigned short>("unsigned short");
    register_integer<signed int>("int");
    register_integer<unsigned int>("unsigned int");
    register_integer<signed long>("long");
    register_integer<unsigned long>("unsigned long");
    
    register_float<float>("float");
    register_float<double>("double");
    
    _embind_register_std_string(TypeID<std::string>::get(), "std::string");
    _embind_register_std_string(TypeID<std::basic_string<unsigned char> >::get(), "std::basic_string<unsigned char>");
    _embind_register_std_wstring(TypeID<std::wstring>::get(), sizeof(wchar_t), "std::wstring");
    _embind_register_emval(TypeID<val>::get(), "emscripten::val");

    // Some of these types are aliases for each other. Luckily,
    // embind.js's _embind_register_memory_view ignores duplicate
    // registrations rather than asserting, so the first
    // register_memory_view call for a particular type will take
    // precedence.

    register_memory_view<char>("emscripten::memory_view<char>");
    register_memory_view<signed char>("emscripten::memory_view<signed char>");
    register_memory_view<unsigned char>("emscripten::memory_view<unsigned char>");

    register_memory_view<short>("emscripten::memory_view<short>");
    register_memory_view<unsigned short>("emscripten::memory_view<unsigned short>");
    register_memory_view<int>("emscripten::memory_view<int>");
    register_memory_view<unsigned int>("emscripten::memory_view<unsigned int>");
    register_memory_view<long>("emscripten::memory_view<long>");
    register_memory_view<unsigned long>("emscripten::memory_view<unsigned long>");

    register_memory_view<int8_t>("emscripten::memory_view<int8_t>");
    register_memory_view<uint8_t>("emscripten::memory_view<uint8_t>");
    register_memory_view<int16_t>("emscripten::memory_view<int16_t>");
    register_memory_view<uint16_t>("emscripten::memory_view<uint16_t>");
    register_memory_view<int32_t>("emscripten::memory_view<int32_t>");
    register_memory_view<uint32_t>("emscripten::memory_view<uint32_t>");

    register_memory_view<float>("emscripten::memory_view<float>");
    register_memory_view<double>("emscripten::memory_view<double>");
    register_memory_view<long double>("emscripten::memory_view<long double>");
}