Function Escape

library/cpp/string_utils/quote/quote.cpp:105–121

template <class It1, class It2, class It3>
static inline It1 Escape(It1 to, It2 from, It3 end, const bool* escape_map = chars_to_url_escape) {
    while (from != end) {
        if (escape_map[(unsigned char)*from]) {
            *to++ = '%';
            *to++ = d2x((unsigned char)*from >> 4);
            *to++ = d2x((unsigned char)*from & 0xF);
        } else {
            *to++ = (*from == ' ' ? '+' : *from);
        }

        ++from;
    }

    *to = 0;

    return to;
}

template <class It1, class It2, class It3, class FromHex>
static inline It1 Unescape(It1 to, It2 from, It3 end, FromHex fromHex) {