char *asctime(const struct tm *tp) {
static char cbuf[26];
char *cp;
char *ncp;
const int *ip;
cp = cbuf;
for (ncp = "Day Mon 00 00:00:00 1900\n"; *cp++ = *ncp++;) ;
ncp = &"SunMonTueWedThuFriSat"[3 * tp->tm_wday];
cp = cbuf;
*cp++ = *ncp++;
*cp++ = *ncp++;
*cp++ = *ncp++;
cp++;
ip = &tp->tm_mon;
ncp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[(*ip)*3];
*cp++ = *ncp++;
*cp++ = *ncp++;
*cp++ = *ncp++;
cp = twoDigits(cp, *--ip);
cp = twoDigits(cp, *--ip+100);
cp = twoDigits(cp, *--ip+100);
cp = twoDigits(cp, *--ip+100);
if (tp->tm_year >= 100) {
cp[1] = '2';
cp[2] = '0';
}
cp += 2;
cp = twoDigits(cp, tp->tm_year + 100);
return cbuf;
}
string threeDigits(const int& num, const unordered_map<int, string>& lookup, const string& unit) {
vector<string> res;
if (num / 100) {
res.emplace_back(lookup.find(num / 100)->second + " " + "Hundred");
}
if (num % 100) {
res.emplace_back(twoDigits(num % 100, lookup));
}
if (!unit.empty()) {
res.emplace_back(unit);
}
return join(res, " ");
}