Method parse_wnorm

external/pugixml/pugixml.cpp:1696–1746

	template <typename opt_escape> struct strconv_attribute_impl
	{
		static char_t* parse_wnorm(char_t* s, char_t end_quote)
		{
			gap g;

			// trim leading whitespaces
			if (IS_CHARTYPE(*s, ct_space))
			{
				char_t* str = s;
				
				do ++str;
				while (IS_CHARTYPE(*str, ct_space));
				
				g.push(s, str - s);
			}

			while (true)
			{
				while (!IS_CHARTYPE(*s, ct_parse_attr_ws | ct_space)) ++s;
				
				if (*s == end_quote)
				{
					char_t* str = g.flush(s);
					
					do *str-- = 0;
					while (IS_CHARTYPE(*str, ct_space));
				
					return s + 1;
				}
				else if (IS_CHARTYPE(*s, ct_space))
				{
					*s++ = ' ';
		
					if (IS_CHARTYPE(*s, ct_space))
					{
						char_t* str = s + 1;
						while (IS_CHARTYPE(*str, ct_space)) ++str;
						
						g.push(s, str - s);
					}
				}
				else if (opt_escape::value && *s == '&')
				{
					s = strconv_escape(s, g);
				}
				else if (!*s)
				{
					return 0;
				}
				else ++s;
			}
		}

		static char_t* parse_wconv(char_t* s, char_t end_quote)
		{