std::streamsize xsputn(const char_type* s, std::streamsize n) {
typedef typename string_type::size_type size_type;
BOOST_ASSERT(string != nullptr);
basic_ostringstreambuf::sync();
const size_type max_size_left = string->max_size() - string->size();
if (static_cast<size_type>(n) < max_size_left) {
string->append(s, static_cast<size_type>(n));
return n;
}
string->append(s, max_size_left);
return static_cast<std::streamsize>(max_size_left);
}
//! Puts a character sequence to the string
std::streamsize xsputn(const char_type* s, std::streamsize n)
{
BOOST_ASSERT(m_Storage != 0);
basic_ostringstreambuf::sync();
typedef typename string_type::size_type string_size_type;
register const string_size_type max_storage_left =
m_Storage->max_size() - m_Storage->size();
if (static_cast< string_size_type >(n) < max_storage_left)
{
m_Storage->append(s, static_cast< string_size_type >(n));
return n;
}
else
{
m_Storage->append(s, max_storage_left);
return static_cast< std::streamsize >(max_storage_left);
}
}
