static sv_<ss_> split_string_to_clean_ui_pieces(const ss_ &s, size_t piece_len)
{
sv_<ss_> result;
size_t start_from = 0;
for(;;){
if(start_from >= s.size())
break;
size_t start_from_instead = start_from;
for(size_t i=start_from; i<s.size(); i++){
if((s[i] < 'a' || s[i] > 'z') && (s[i] < 'A' || s[i] > 'Z') &&
(s[i] < '0' || s[i] > '9')){
start_from_instead = i + 1;
continue;
}
break;
}
if(start_from_instead >= s.size()){
result.push_back(s.substr(start_from));
break;
}
if(start_from_instead >= s.size() - piece_len){
result.push_back(s.substr(start_from_instead));
break;
}
size_t end_at = start_from_instead + piece_len;
if(s.size() > end_at + 2 && end_at >= 3){
if(is_spacing(s[end_at-2]) && !is_spacing(s[end_at-1]) && !is_spacing(s[end_at]) && (is_spacing(s[end_at+1]) || is_spacing(s[end_at+2]))){
end_at = end_at - 1;
} else if(is_spacing(s[end_at-3]) && !is_spacing(s[end_at-2]) && !is_spacing(s[end_at-1]) && !is_spacing(s[end_at]) && (is_spacing(s[end_at+1]) || is_spacing(s[end_at+2]))){
end_at = end_at - 2;
}
}
result.push_back(s.substr(start_from_instead, end_at - start_from_instead));
start_from = end_at;
}
return result;
}
static ss_ truncate(const ss_ &s, size_t len)
{
if(s.size() < len) return s;
return s.substr(0, len);
}