inline size_t filesize()

in src/main/cpp/sdk/common/spdlog/details/os.h [204:246]

• 39 lines of code
• 11 McCabe index (conditional complexity)

inline size_t filesize(FILE *f)
{
    if (f == nullptr)
    {
        throw spdlog_ex("Failed getting file size. fd is null");
    }
#if defined(_WIN32) && !defined(__CYGWIN__)
    int fd = _fileno(f);
#if _WIN64 // 64 bits
    __int64 ret = _filelengthi64(fd);
    if (ret >= 0)
    {
        return static_cast<size_t>(ret);
    }

#else // windows 32 bits
    long ret = _filelength(fd);
    if (ret >= 0)
    {
        return static_cast<size_t>(ret);
    }
#endif

#else // unix
    int fd = fileno(f);
// 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
#if !defined(__FreeBSD__) && !defined(__APPLE__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
    struct stat64 st;
    if (::fstat64(fd, &st) == 0)
    {
        return static_cast<size_t>(st.st_size);
    }
#else // unix 32 bits or cygwin
    struct stat st;

    if (::fstat(fd, &st) == 0)
    {
        return static_cast<size_t>(st.st_size);
    }
#endif
#endif
    throw spdlog_ex("Failed getting file size from fd", errno);
}