static inline
std::string
join(const cstring_span& str, const cstring_span& sep, bool trail_sep) {
span_size_t slen = sep.size();
span_size_t len = trail_sep?slen:0;
auto get_len = [&len,slen](const element& elem, bool first) {
if(!first) len += slen;
len += elem.value_size();
};
for_each_elem(str, get_len);
std::string res;
res.reserve(std_size(len));
auto fill = [&res,sep](const element& elem, bool first) {
if(!first) res.append(sep.data(), std_size(sep.size()));
res.append(elem.value_data(), std_size(elem.value_size()));
};
for_each_elem(str, fill);
if(trail_sep) {
res.append(sep.data(), std_size(sep.size()));
}
assert(res.size() == std_size(len));
return std::move(res);
}
static inline
cstring_span
_fit(const cstring_span& s)
noexcept {
span_size_t hs = element_header_size(s);
span_size_t vs = element_value_size(s, hs);
assert(s.size() >= hs+vs+hs);
return {s.data(), hs+vs+hs};
}
static inline
void for_each_elem(const cstring_span& str, Func func)
noexcept {
span_size_t i = 0;
bool first = true;
while(i < str.size()) {
element elem(str.data()+i, str.size()-i);
func(elem, first);
i += elem.size();
first = false;
}
}
void _update(void) const {
if(_pos != nullptr && (_tmp.size() == 0)) {
span_size_t ll = _len_len();
span_size_t vl = _val_len(ll);
_tmp = cstring_span{_pos+ll, span_size_t(vl)};
}
}
static inline
void rev_for_each_elem(const cstring_span& str, Func func)
noexcept {
span_size_t i = str.size()-1;
bool first = true;
while(i > 0) {
while(!mbs::is_valid_head_byte(byte(str[i]))) {
assert(i > 0);
--i;
}
element elem(str.data()+i, i, str.size()-i);
func(elem, first);
i -= elem.header_size()+elem.value_size()+1;
first = false;
}
}
static inline
cstring_span
_rev_fit(const cstring_span& s, span_size_t rev_sz)
noexcept {
span_size_t hs = element_header_size(s);
span_size_t vs = element_value_size(s, hs);
assert(rev_sz >= hs+vs);
return {s.data()-hs-vs, hs+vs+hs};
}
static inline
span_size_t
element_value_size(const cstring_span& elem)
noexcept {
return element_value_size(elem, elem.size());
}
Sym addSymbolMustBeNew(cstring_span<> word) {
return addSymbolMustBeNew(std::string(word.data(), word.size()));
}