1extern "C" {
 2#include "libc.h"
 3}
 4
 5#ifdef __MINGW32__
 6    #include <_mingw.h>
 7#endif
 8
 9template <uint32_t Major, uint32_t Minor>
10struct version_t {
11    static constexpr uint32_t digits(uint32_t n) noexcept {
12        uint32_t len = 1;
13        for (auto temp = n / 10; temp; temp /= 10) {
14            len++;
15        }
16        return len;
17    }
18
19    char buf[digits(Major) + digits(Minor) + 2];
20
21    constexpr version_t() noexcept {
22        auto ptr = buf + sizeof(buf);
23        *--ptr = '\0';
24
25        auto append = [&](uint32_t n) noexcept {
26            if (n == 0) {
27                *--ptr = '0';
28            } else {
29                for (; n; n /= 10) {
30                    *--ptr = static_cast<char>('0' + n % 10);
31                }
32            }
33        };
34
35        append(Minor);
36        *--ptr = '.';
37        append(Major);
38    }
39
40    constexpr operator const char*() const noexcept {
41        return buf;
42    }
43};
44
45template <uint32_t Major, uint32_t Minor>
46constexpr version_t<Major, Minor> version;
47
48extern "C" const char* ffDetectLibc(FFLibcResult* result) {
49#ifdef _UCRT
50    result->name = "ucrt";
51#else
52    result->name = "msvcrt";
53#endif
54
55    result->version = version<(__MSVCRT_VERSION__ >> 8), (__MSVCRT_VERSION__ & 0xFF)>;
56    return nullptr;
57}