C++ (Cpp) string::max_size Examples

Example #1

File: utils.cpp Project: mengyanyl/myanlib

int safe_vsprintf(std::string& buf, const char * fmt, va_list argptr)
{
    char buffer[1024];

    int ret = ::vsnprintf(buffer, sizeof(buffer), fmt, argptr);
    if (ret >= (int) sizeof(buffer))
    {
        if (ret >= (int) buf.max_size())
        {
            buf.clear();
            printf("safe_vsprintf: string max_size limit(%d)", buf.max_size());
            return 0;
        }
        buf.resize(ret);
        ret = vsnprintf(&buf.at(0), ret + 1, fmt, argptr);
    }
    else
    {
        buf = buffer;
    }
    //va_end(argptr);
    return ret;
}

Example #2

File: lpl.hpp Project: ssahasra/HIP

inline const std::string& path_to_self() {
    static constexpr const char self[] = "/proc/self/exe";

    static std::string r;
    static std::once_flag f;

    std::call_once(f, []() {
        using N = decltype(readlink(self, &r.front(), r.size()));

        constexpr decltype(r.size()) max_path_sz{PATH_MAX};
        N read_cnt;
        do {
            r.resize(std::max(2 * r.size(), max_path_sz));
            read_cnt = readlink(self, &r.front(), r.size());
        } while (read_cnt == -1 && r.size() < r.max_size());

        r.resize(std::max(read_cnt, N{0}));
    });

    return r;
}