//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <codecvt>

// template <class Elem, unsigned long Maxcode = 0x10ffff,
//           codecvt_mode Mode = (codecvt_mode)0>
// class codecvt_utf16
//     : public codecvt<Elem, char, mbstate_t>
// {
//     // unspecified
// };

// result
// out(stateT& state,
//     const internT* from, const internT* from_end, const internT*& from_next,
//     externT* to, externT* to_end, externT*& to_next) const;

#include <codecvt>
#include <cassert>

int main()
{
    {
        typedef std::codecvt_utf16<wchar_t> C;
        C c;
        wchar_t w = 0x40003;
        char n[4] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[0] == char(0xD8));
        assert(n[1] == char(0xC0));
        assert(n[2] == char(0xDC));
        assert(n[3] == char(0x03));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[0] == char(0x10));
        assert(n[1] == char(0x05));
        assert(n[2] == char(0xDC));
        assert(n[3] == char(0x03));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[0] == char(0x04));
        assert(n[1] == char(0x53));
        assert(n[2] == char(0xDC));
        assert(n[3] == char(0x03));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[0] == char(0x00));
        assert(n[1] == char(0x56));
        assert(n[2] == char(0xDC));
        assert(n[3] == char(0x03));
    }
    {
        typedef std::codecvt_utf16<wchar_t, 0x1000> C;
        C c;
        wchar_t w = 0x40003;
        char n[4] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::error);
        assert(wp == &w);
        assert(np == n);
        assert(n[0] == char(0));
        assert(n[1] == char(0));
        assert(n[2] == char(0));
        assert(n[3] == char(0));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::error);
        assert(wp == &w);
        assert(np == n);
        assert(n[0] == char(0));
        assert(n[1] == char(0));
        assert(n[2] == char(0));
        assert(n[3] == char(0));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[0] == char(0x04));
        assert(n[1] == char(0x53));
        assert(n[2] == char(0));
        assert(n[3] == char(0));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[0] == char(0x00));
        assert(n[1] == char(0x56));
        assert(n[2] == char(0));
        assert(n[3] == char(0));
    }
    {
        typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::generate_header> C;
        C c;
        wchar_t w = 0x40003;
        char n[6] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+6);
        assert(n[0] == char(0xFE));
        assert(n[1] == char(0xFF));
        assert(n[2] == char(0xD8));
        assert(n[3] == char(0xC0));
        assert(n[4] == char(0xDC));
        assert(n[5] == char(0x03));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[0] == char(0xFE));
        assert(n[1] == char(0xFF));
        assert(n[2] == char(0x10));
        assert(n[3] == char(0x05));
        assert(n[4] == char(0xDC));
        assert(n[5] == char(0x03));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[0] == char(0xFE));
        assert(n[1] == char(0xFF));
        assert(n[2] == char(0x04));
        assert(n[3] == char(0x53));
        assert(n[4] == char(0xDC));
        assert(n[5] == char(0x03));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[0] == char(0xFE));
        assert(n[1] == char(0xFF));
        assert(n[2] == char(0x00));
        assert(n[3] == char(0x56));
        assert(n[4] == char(0xDC));
        assert(n[5] == char(0x03));
    }

    {
        typedef std::codecvt_utf16<wchar_t, 0x10FFFF, std::little_endian> C;
        C c;
        wchar_t w = 0x40003;
        char n[4] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[1] == char(0xD8));
        assert(n[0] == char(0xC0));
        assert(n[3] == char(0xDC));
        assert(n[2] == char(0x03));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[1] == char(0x10));
        assert(n[0] == char(0x05));
        assert(n[3] == char(0xDC));
        assert(n[2] == char(0x03));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[1] == char(0x04));
        assert(n[0] == char(0x53));
        assert(n[3] == char(0xDC));
        assert(n[2] == char(0x03));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[1] == char(0x00));
        assert(n[0] == char(0x56));
        assert(n[3] == char(0xDC));
        assert(n[2] == char(0x03));
    }
    {
        typedef std::codecvt_utf16<wchar_t, 0x1000, std::little_endian> C;
        C c;
        wchar_t w = 0x40003;
        char n[4] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::error);
        assert(wp == &w);
        assert(np == n);
        assert(n[1] == char(0));
        assert(n[0] == char(0));
        assert(n[3] == char(0));
        assert(n[2] == char(0));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::error);
        assert(wp == &w);
        assert(np == n);
        assert(n[1] == char(0));
        assert(n[0] == char(0));
        assert(n[3] == char(0));
        assert(n[2] == char(0));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[1] == char(0x04));
        assert(n[0] == char(0x53));
        assert(n[3] == char(0));
        assert(n[2] == char(0));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+4, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+2);
        assert(n[1] == char(0x00));
        assert(n[0] == char(0x56));
        assert(n[3] == char(0));
        assert(n[2] == char(0));
    }
    {
        typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::codecvt_mode(
                                                         std::generate_header |
                                                         std::little_endian)> C;
        C c;
        wchar_t w = 0x40003;
        char n[6] = {0};
        const wchar_t* wp = nullptr;
        std::mbstate_t m;
        char* np = nullptr;
        std::codecvt_base::result r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+6);
        assert(n[1] == char(0xFE));
        assert(n[0] == char(0xFF));
        assert(n[3] == char(0xD8));
        assert(n[2] == char(0xC0));
        assert(n[5] == char(0xDC));
        assert(n[4] == char(0x03));

        w = 0x1005;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[1] == char(0xFE));
        assert(n[0] == char(0xFF));
        assert(n[3] == char(0x10));
        assert(n[2] == char(0x05));
        assert(n[5] == char(0xDC));
        assert(n[4] == char(0x03));

        w = 0x453;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[1] == char(0xFE));
        assert(n[0] == char(0xFF));
        assert(n[3] == char(0x04));
        assert(n[2] == char(0x53));
        assert(n[5] == char(0xDC));
        assert(n[4] == char(0x03));

        w = 0x56;
        r = c.out(m, &w, &w+1, wp, n, n+6, np);
        assert(r == std::codecvt_base::ok);
        assert(wp == &w+1);
        assert(np == n+4);
        assert(n[1] == char(0xFE));
        assert(n[0] == char(0xFF));
        assert(n[3] == char(0x00));
        assert(n[2] == char(0x56));
        assert(n[5] == char(0xDC));
        assert(n[4] == char(0x03));
    }
}