Method copy_state

src/butil/status.cpp:113–127

}

Status::State* Status::copy_state(const State* s) {
    const size_t n = status_size(s->size);
    State* s2 = reinterpret_cast<State*>(malloc(n));
    if (NULL == s2) {
        // TODO: If we failed to allocate, the status will be OK.
        return NULL;
    }
    s2->code = s->code;
    s2->size = s->size;
    s2->state_size = n;
    char* msg_head = s2->message;
    memcpy(msg_head, s->message, s->size);
    msg_head[s->size] = '\0';
    return s2;
};

std::string Status::error_str() const {
    if (_state == NULL) {