inline bool extract(XString str, HumanTimeDiff *iv) { // str is a sequence of [-+]?[0-9]+([ay]|m|[jd]|h|mn|s) // there are NO spaces here // parse by counting the number starts auto is_num = [](char c) { return c == '-' || c == '+' || ('0' <= c && c <= '9'); }; if (!str || !is_num(str.front())) return false; *iv = HumanTimeDiff{}; while (str) { auto it = std::find_if_not(str.begin(), str.end(), is_num); auto it2 = std::find_if(it, str.end(), is_num); XString number = str.xislice_h(it); XString suffix = str.xislice(it, it2); str = str.xislice_t(it2); short *ptr = nullptr; if (suffix == "y"_s || suffix == "a"_s) ptr = &iv->year; else if (suffix == "m"_s) ptr = &iv->month; else if (suffix == "j"_s || suffix == "d"_s) ptr = &iv->day; else if (suffix == "h"_s) ptr = &iv->hour; else if (suffix == "mn"_s) ptr = &iv->minute; else if (suffix == "s"_s) ptr = &iv->second; else return false; if (number.startswith('+') && !number.startswith("+-"_s)) number = number.xslice_t(1); if (*ptr || !extract(number, ptr)) return false; } return true; }
//--------------------------------------------------- // E-mail check: return 0 (not correct) or 1 (valid). //--------------------------------------------------- bool e_mail_check(XString email) { // athena limits if (email.size() < 3 || email.size() > 39) return 0; // part of RFC limits (official reference of e-mail description) XString::iterator at = std::find(email.begin(), email.end(), '@'); if (at == email.end()) return 0; XString username = email.xislice_h(at); XString hostname = email.xislice_t(at + 1); if (!username || !hostname) return 0; if (hostname.contains('@')) return 0; if (hostname.front() == '.' || hostname.back() == '.') return 0; if (hostname.contains_seq("..")) return 0; if (email.contains_any(" ;")) return 0; return email.is_print(); }