int string::compare(const std::u32string & s) const noexcept
{
size_type sz = size();
size_type len = s.size();
size_type n = std::min(sz, len);
auto pos = cbegin();
auto spos = s.cbegin();
for ( ; n; pos++, spos++ )
{
if ( traits_type::lt(*pos, *spos) )
return -1;
if ( traits_type::lt(*spos, *pos) )
return 1;
}
if ( sz < len )
return -1;
if ( sz > len )
return 1;
return 0;
}
// static
bool EditableMapObject::ValidateName(string const & name)
{
if (name.empty())
return true;
if (strings::IsASCIIString(name))
return regex_match(name, regex(R"(^[ A-Za-z0-9.,?!@#$%&()\-\+:;"'`]+$)"));
std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> converter;
std::u32string u32name;
try
{
u32name = converter.from_bytes(name);
}
catch (std::range_error const &)
{
// Cannot convert, for ex. it is possible for some emoji.
return false;
}
std::u32string const excludedSymbols = U"^~§><{}[]*=_±\n\t\r\v\f|√•÷׶°";
for (auto const ch : u32name)
{
// Exclude arrows, mathematical symbols, borders, geometric shapes.
if (ch >= U'\U00002190' && ch <= U'\U00002BFF')
return false;
// Exclude format controls, musical symbols, emoticons, ornamental and pictographs,
// ancient and exotic alphabets.
if (ch >= U'\U0000FFF0' && ch <= U'\U0001F9FF')
return false;
if (find(excludedSymbols.cbegin(), excludedSymbols.cend(), ch) != excludedSymbols.cend())
return false;
}
return true;
}
int string::compare(size_type pos1, size_type n1, const std::u32string& str,
size_type pos2, size_type n2) const
{
if ( n1 == 0 && n2 > 0 )
return -1;
size_type sz = (n1 == npos ? size() - pos1 : n1);
size_type len = (n2 == npos ? str.size() - pos2 : n2);
size_type n = std::min(sz, len);
auto pos = cbegin()+pos1;
auto spos = str.cbegin();
for ( ; n; pos++, spos++ )
{
if ( traits_type::lt(*pos, *spos) )
return -1;
if ( traits_type::lt(*spos, *pos) )
return 1;
}
if ( sz < len )
return -1;
if ( sz > len )
return 1;
return 0;
}