pugixml.cpp

						PUGI__PUSHNODE(node_cdata); // Append a new node on the tree.
						cursor->value = s; // Save the offset.

						if (PUGI__OPTSET(parse_eol))
						{
							s = strconv_cdata(s, endch);

							if (!s) PUGI__THROW_ERROR(status_bad_cdata, cursor->value);
						}
						else
						{
							// Scan for terminating ']]>'.
							PUGI__SCANFOR(s[0] == ']' && s[1] == ']' && PUGI__ENDSWITH(s[2], '>'));
							PUGI__CHECK_ERROR(status_bad_cdata, s);

							*s++ = 0; // Zero-terminate this segment.
						}
					}
					else // Flagged for discard, but we still have to scan for the terminator.
					{
						// Scan for terminating ']]>'.
						PUGI__SCANFOR(s[0] == ']' && s[1] == ']' && PUGI__ENDSWITH(s[2], '>'));
						PUGI__CHECK_ERROR(status_bad_cdata, s);

						++s;
					}

					s += (s[1] == '>' ? 2 : 1); // Step over the last ']>'.
				}
				else PUGI__THROW_ERROR(status_bad_cdata, s);
			}
			else if (s[0] == 'D' && s[1] == 'O' && s[2] == 'C' && s[3] == 'T' && s[4] == 'Y' && s[5] == 'P' && PUGI__ENDSWITH(s[6], 'E'))
			{
				s -= 2;

				if (cursor->parent) PUGI__THROW_ERROR(status_bad_doctype, s);

				char_t* mark = s + 9;

				s = parse_doctype_group(s, endch);
				if (!s) return s;

				assert((*s == 0 && endch == '>') || *s == '>');
				if (*s) *s++ = 0;

				if (PUGI__OPTSET(parse_doctype))
				{
					while (PUGI__IS_CHARTYPE(*mark, ct_space)) ++mark;

					PUGI__PUSHNODE(node_doctype);

					cursor->value = mark;
				}
			}
			else if (*s == 0 && endch == '-') PUGI__THROW_ERROR(status_bad_comment, s);
			else if (*s == 0 && endch == '[') PUGI__THROW_ERROR(status_bad_cdata, s);
			else PUGI__THROW_ERROR(status_unrecognized_tag, s);

			return s;
		}

		char_t* parse_question(char_t* s, xml_node_struct*& ref_cursor, unsigned int optmsk, char_t endch)
		{
			// load into registers
			xml_node_struct* cursor = ref_cursor;
			char_t ch = 0;

			// parse node contents, starting with question mark
			++s;

			// read PI target
			char_t* target = s;

			if (!PUGI__IS_CHARTYPE(*s, ct_start_symbol)) PUGI__THROW_ERROR(status_bad_pi, s);

			PUGI__SCANWHILE(PUGI__IS_CHARTYPE(*s, ct_symbol));
			PUGI__CHECK_ERROR(status_bad_pi, s);

			// determine node type; stricmp / strcasecmp is not portable
			bool declaration = (target[0] | ' ') == 'x' && (target[1] | ' ') == 'm' && (target[2] | ' ') == 'l' && target + 3 == s;

			if (declaration ? PUGI__OPTSET(parse_declaration) : PUGI__OPTSET(parse_pi))
			{
				if (declaration)
				{
					// disallow non top-level declarations
					if (cursor->parent) PUGI__THROW_ERROR(status_bad_pi, s);

					PUGI__PUSHNODE(node_declaration);
				}
				else
				{
					PUGI__PUSHNODE(node_pi);
				}

				cursor->name = target;

				PUGI__ENDSEG();

				// parse value/attributes
				if (ch == '?')
				{
					// empty node
					if (!PUGI__ENDSWITH(*s, '>')) PUGI__THROW_ERROR(status_bad_pi, s);
					s += (*s == '>');

					PUGI__POPNODE();
				}
				else if (PUGI__IS_CHARTYPE(ch, ct_space))
				{
					PUGI__SKIPWS();

					// scan for tag end
					char_t* value = s;

					PUGI__SCANFOR(s[0] == '?' && PUGI__ENDSWITH(s[1], '>'));
					PUGI__CHECK_ERROR(status_bad_pi, s);

					if (declaration)
					{
						// replace ending ? with / so that 'element' terminates properly
						*s = '/';

						// we exit from this function with cursor at node_declaration, which is a signal to parse() to go to LOC_ATTRIBUTES
						s = value;
					}
					else
					{
						// store value and step over >
						cursor->value = value;

						PUGI__POPNODE();

						PUGI__ENDSEG();

						s += (*s == '>');
					}
				}
				else PUGI__THROW_ERROR(status_bad_pi, s);
			}
			else
			{
				// scan for tag end
				PUGI__SCANFOR(s[0] == '?' && PUGI__ENDSWITH(s[1], '>'));
				PUGI__CHECK_ERROR(status_bad_pi, s);

				s += (s[1] == '>' ? 2 : 1);
			}

			// store from registers
			ref_cursor = cursor;

			return s;
		}

		char_t* parse_tree(char_t* s, xml_node_struct* root, unsigned int optmsk, char_t endch)
		{
			strconv_attribute_t strconv_attribute = get_strconv_attribute(optmsk);
			strconv_pcdata_t strconv_pcdata = get_strconv_pcdata(optmsk);
			
			char_t ch = 0;
			xml_node_struct* cursor = root;
			char_t* mark = s;

			while (*s != 0)
			{
				if (*s == '<')
				{
					++s;

				LOC_TAG:
					if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) // '<#...'
					{
						PUGI__PUSHNODE(node_element); // Append a new node to the tree.

						cursor->name = s;

						PUGI__SCANWHILE_UNROLL(PUGI__IS_CHARTYPE(ss, ct_symbol)); // Scan for a terminator.
						PUGI__ENDSEG(); // Save char in 'ch', terminate & step over.

						if (ch == '>')
						{
							// end of tag
						}
						else if (PUGI__IS_CHARTYPE(ch, ct_space))
						{
						LOC_ATTRIBUTES:
							while (true)
							{
								PUGI__SKIPWS(); // Eat any whitespace.
						
								if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) // <... #...
								{
									xml_attribute_struct* a = append_new_attribute(cursor, alloc); // Make space for this attribute.
									if (!a) PUGI__THROW_ERROR(status_out_of_memory, s);

									a->name = s; // Save the offset.

									PUGI__SCANWHILE_UNROLL(PUGI__IS_CHARTYPE(ss, ct_symbol)); // Scan for a terminator.
									PUGI__ENDSEG(); // Save char in 'ch', terminate & step over.

									if (PUGI__IS_CHARTYPE(ch, ct_space))
									{
										PUGI__SKIPWS(); // Eat any whitespace.

										ch = *s;
										++s;
									}
									
									if (ch == '=') // '<... #=...'
									{
										PUGI__SKIPWS(); // Eat any whitespace.

										if (*s == '"' || *s == '\'') // '<... #="...'
										{
											ch = *s; // Save quote char to avoid breaking on "''" -or- '""'.
											++s; // Step over the quote.
											a->value = s; // Save the offset.

											s = strconv_attribute(s, ch);
										
											if (!s) PUGI__THROW_ERROR(status_bad_attribute, a->value);

											// After this line the loop continues from the start;
											// Whitespaces, / and > are ok, symbols and EOF are wrong,
											// everything else will be detected
											if (PUGI__IS_CHARTYPE(*s, ct_start_symbol)) PUGI__THROW_ERROR(status_bad_attribute, s);
										}
										else PUGI__THROW_ERROR(status_bad_attribute, s);
									}
									else PUGI__THROW_ERROR(status_bad_attribute, s);
								}
								else if (*s == '/')
								{
									++s;
									
									if (*s == '>')
									{
										PUGI__POPNODE();
										s++;
										break;
									}
									else if (*s == 0 && endch == '>')
									{
										PUGI__POPNODE();
										break;
									}
									else PUGI__THROW_ERROR(status_bad_start_element, s);
								}
								else if (*s == '>')
								{
									++s;

									break;
								}
								else if (*s == 0 && endch == '>')
								{
									break;
								}
								else PUGI__THROW_ERROR(status_bad_start_element, s);
							}

							// !!!
						}
						else if (ch == '/') // '<#.../'
						{
							if (!PUGI__ENDSWITH(*s, '>')) PUGI__THROW_ERROR(status_bad_start_element, s);

							PUGI__POPNODE(); // Pop.

							s += (*s == '>');
						}
						else if (ch == 0)
						{
							// we stepped over null terminator, backtrack & handle closing tag
							--s;
							
							if (endch != '>') PUGI__THROW_ERROR(status_bad_start_element, s);
						}
						else PUGI__THROW_ERROR(status_bad_start_element, s);
					}
					else if (*s == '/')
					{
						++s;

						char_t* name = cursor->name;
						if (!name) PUGI__THROW_ERROR(status_end_element_mismatch, s);
						
						while (PUGI__IS_CHARTYPE(*s, ct_symbol))
						{
							if (*s++ != *name++) PUGI__THROW_ERROR(status_end_element_mismatch, s);
						}

						if (*name)
						{
							if (*s == 0 && name[0] == endch && name[1] == 0) PUGI__THROW_ERROR(status_bad_end_element, s);
							else PUGI__THROW_ERROR(status_end_element_mismatch, s);
						}
							
						PUGI__POPNODE(); // Pop.

						PUGI__SKIPWS();

						if (*s == 0)
						{
							if (endch != '>') PUGI__THROW_ERROR(status_bad_end_element, s);
						}
						else
						{
							if (*s != '>') PUGI__THROW_ERROR(status_bad_end_element, s);
							++s;
						}
					}
					else if (*s == '?') // '<?...'
					{
						s = parse_question(s, cursor, optmsk, endch);
						if (!s) return s;

						assert(cursor);
						if (PUGI__NODETYPE(cursor) == node_declaration) goto LOC_ATTRIBUTES;
					}
					else if (*s == '!') // '<!...'
					{
						s = parse_exclamation(s, cursor, optmsk, endch);
						if (!s) return s;
					}
					else if (*s == 0 && endch == '?') PUGI__THROW_ERROR(status_bad_pi, s);
					else PUGI__THROW_ERROR(status_unrecognized_tag, s);
				}
				else
				{
					mark = s; // Save this offset while searching for a terminator.

					PUGI__SKIPWS(); // Eat whitespace if no genuine PCDATA here.

					if (*s == '<' || !*s)
					{
						// We skipped some whitespace characters because otherwise we would take the tag branch instead of PCDATA one
						assert(mark != s);

						if (!PUGI__OPTSET(parse_ws_pcdata | parse_ws_pcdata_single) || PUGI__OPTSET(parse_trim_pcdata))
						{
							continue;
						}
						else if (PUGI__OPTSET(parse_ws_pcdata_single))
						{
							if (s[0] != '<' || s[1] != '/' || cursor->first_child) continue;
						}
					}

					if (!PUGI__OPTSET(parse_trim_pcdata))
						s = mark;
							
					if (cursor->parent || PUGI__OPTSET(parse_fragment))
					{
						PUGI__PUSHNODE(node_pcdata); // Append a new node on the tree.
						cursor->value = s; // Save the offset.

						s = strconv_pcdata(s);
								
						PUGI__POPNODE(); // Pop since this is a standalone.
						
						if (!*s) break;
					}
					else
					{
						PUGI__SCANFOR(*s == '<'); // '...<'
						if (!*s) break;
						
						++s;
					}

					// We're after '<'
					goto LOC_TAG;
				}
			}

			// check that last tag is closed
			if (cursor != root) PUGI__THROW_ERROR(status_end_element_mismatch, s);

			return s;
		}

	#ifdef PUGIXML_WCHAR_MODE
		static char_t* parse_skip_bom(char_t* s)
		{
			unsigned int bom = 0xfeff;
			return (s[0] == static_cast<wchar_t>(bom)) ? s + 1 : s;
		}
	#else
		static char_t* parse_skip_bom(char_t* s)
		{
			return (s[0] == '\xef' && s[1] == '\xbb' && s[2] == '\xbf') ? s + 3 : s;
		}
	#endif

		static bool has_element_node_siblings(xml_node_struct* node)
		{
			while (node)
			{
				if (PUGI__NODETYPE(node) == node_element) return true;

				node = node->next_sibling;
			}

			return false;
		}

		static xml_parse_result parse(char_t* buffer, size_t length, xml_document_struct* xmldoc, xml_node_struct* root, unsigned int optmsk)
		{
			// early-out for empty documents
			if (length == 0)
				return make_parse_result(PUGI__OPTSET(parse_fragment) ? status_ok : status_no_document_element);

			// get last child of the root before parsing
			xml_node_struct* last_root_child = root->first_child ? root->first_child->prev_sibling_c + 0 : 0;
	
			// create parser on stack
			xml_parser parser(static_cast<xml_allocator*>(xmldoc));

			// save last character and make buffer zero-terminated (speeds up parsing)
			char_t endch = buffer[length - 1];
			buffer[length - 1] = 0;
			
			// skip BOM to make sure it does not end up as part of parse output
			char_t* buffer_data = parse_skip_bom(buffer);

			// perform actual parsing
			parser.parse_tree(buffer_data, root, optmsk, endch);

			xml_parse_result result = make_parse_result(parser.error_status, parser.error_offset ? parser.error_offset - buffer : 0);
			assert(result.offset >= 0 && static_cast<size_t>(result.offset) <= length);

			if (result)
			{
				// since we removed last character, we have to handle the only possible false positive (stray <)
				if (endch == '<')
					return make_parse_result(status_unrecognized_tag, length - 1);

				// check if there are any element nodes parsed
				xml_node_struct* first_root_child_parsed = last_root_child ? last_root_child->next_sibling + 0 : root->first_child+ 0;

				if (!PUGI__OPTSET(parse_fragment) && !has_element_node_siblings(first_root_child_parsed))
					return make_parse_result(status_no_document_element, length - 1);
			}
			else
			{
				// roll back offset if it occurs on a null terminator in the source buffer
				if (result.offset > 0 && static_cast<size_t>(result.offset) == length - 1 && endch == 0)
					result.offset--;
			}

			return result;
		}
	};

	// Output facilities
	PUGI__FN xml_encoding get_write_native_encoding()
	{
	#ifdef PUGIXML_WCHAR_MODE
		return get_wchar_encoding();
	#else
		return encoding_utf8;
	#endif
	}

	PUGI__FN xml_encoding get_write_encoding(xml_encoding encoding)
	{
		// replace wchar encoding with utf implementation
		if (encoding == encoding_wchar) return get_wchar_encoding();

		// replace utf16 encoding with utf16 with specific endianness
		if (encoding == encoding_utf16) return is_little_endian() ? encoding_utf16_le : encoding_utf16_be;

		// replace utf32 encoding with utf32 with specific endianness
		if (encoding == encoding_utf32) return is_little_endian() ? encoding_utf32_le : encoding_utf32_be;

		// only do autodetection if no explicit encoding is requested
		if (encoding != encoding_auto) return encoding;

		// assume utf8 encoding
		return encoding_utf8;
	}

	template <typename D, typename T> PUGI__FN size_t convert_buffer_output_generic(typename T::value_type dest, const char_t* data, size_t length, D, T)
	{
		PUGI__STATIC_ASSERT(sizeof(char_t) == sizeof(typename D::type));

		typename T::value_type end = D::process(reinterpret_cast<const typename D::type*>(data), length, dest, T());

		return static_cast<size_t>(end - dest) * sizeof(*dest);
	}

	template <typename D, typename T> PUGI__FN size_t convert_buffer_output_generic(typename T::value_type dest, const char_t* data, size_t length, D, T, bool opt_swap)
	{
		PUGI__STATIC_ASSERT(sizeof(char_t) == sizeof(typename D::type));

		typename T::value_type end = D::process(reinterpret_cast<const typename D::type*>(data), length, dest, T());

		if (opt_swap)
		{
			for (typename T::value_type i = dest; i != end; ++i)
				*i = endian_swap(*i);
		}

		return static_cast<size_t>(end - dest) * sizeof(*dest);
	}

#ifdef PUGIXML_WCHAR_MODE
	PUGI__FN size_t get_valid_length(const char_t* data, size_t length)
	{
		if (length < 1) return 0;

		// discard last character if it's the lead of a surrogate pair 
		return (sizeof(wchar_t) == 2 && static_cast<unsigned int>(static_cast<uint16_t>(data[length - 1]) - 0xD800) < 0x400) ? length - 1 : length;
	}

	PUGI__FN size_t convert_buffer_output(char_t* r_char, uint8_t* r_u8, uint16_t* r_u16, uint32_t* r_u32, const char_t* data, size_t length, xml_encoding encoding)
	{
		// only endian-swapping is required
		if (need_endian_swap_utf(encoding, get_wchar_encoding()))
		{
			convert_wchar_endian_swap(r_char, data, length);

			return length * sizeof(char_t);
		}
	
		// convert to utf8
		if (encoding == encoding_utf8)
			return convert_buffer_output_generic(r_u8, data, length, wchar_decoder(), utf8_writer());

		// convert to utf16
		if (encoding == encoding_utf16_be || encoding == encoding_utf16_le)
		{
			xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be;

			return convert_buffer_output_generic(r_u16, data, length, wchar_decoder(), utf16_writer(), native_encoding != encoding);
		}

		// convert to utf32
		if (encoding == encoding_utf32_be || encoding == encoding_utf32_le)
		{
			xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be;

			return convert_buffer_output_generic(r_u32, data, length, wchar_decoder(), utf32_writer(), native_encoding != encoding);
		}

		// convert to latin1
		if (encoding == encoding_latin1)
			return convert_buffer_output_generic(r_u8, data, length, wchar_decoder(), latin1_writer());

		assert(!"Invalid encoding");
		return 0;
	}
#else
	PUGI__FN size_t get_valid_length(const char_t* data, size_t length)
	{
		if (length < 5) return 0;

		for (size_t i = 1; i <= 4; ++i)
		{
			uint8_t ch = static_cast<uint8_t>(data[length - i]);

			// either a standalone character or a leading one
			if ((ch & 0xc0) != 0x80) return length - i;
		}

		// there are four non-leading characters at the end, sequence tail is broken so might as well process the whole chunk
		return length;
	}

	PUGI__FN size_t convert_buffer_output(char_t* /* r_char */, uint8_t* r_u8, uint16_t* r_u16, uint32_t* r_u32, const char_t* data, size_t length, xml_encoding encoding)
	{
		if (encoding == encoding_utf16_be || encoding == encoding_utf16_le)
		{
			xml_encoding native_encoding = is_little_endian() ? encoding_utf16_le : encoding_utf16_be;

			return convert_buffer_output_generic(r_u16, data, length, utf8_decoder(), utf16_writer(), native_encoding != encoding);
		}

		if (encoding == encoding_utf32_be || encoding == encoding_utf32_le)
		{
			xml_encoding native_encoding = is_little_endian() ? encoding_utf32_le : encoding_utf32_be;

			return convert_buffer_output_generic(r_u32, data, length, utf8_decoder(), utf32_writer(), native_encoding != encoding);
		}

		if (encoding == encoding_latin1)
			return convert_buffer_output_generic(r_u8, data, length, utf8_decoder(), latin1_writer());

		assert(!"Invalid encoding");
		return 0;
	}
#endif

	class xml_buffered_writer
	{
		xml_buffered_writer(const xml_buffered_writer&);
		xml_buffered_writer& operator=(const xml_buffered_writer&);

	public:
		xml_buffered_writer(xml_writer& writer_, xml_encoding user_encoding): writer(writer_), bufsize(0), encoding(get_write_encoding(user_encoding))
		{
			PUGI__STATIC_ASSERT(bufcapacity >= 8);
		}

		size_t flush()
		{
			flush(buffer, bufsize);
			bufsize = 0;
			return 0;
		}

		void flush(const char_t* data, size_t size)
		{
			if (size == 0) return;

			// fast path, just write data
			if (encoding == get_write_native_encoding())
				writer.write(data, size * sizeof(char_t));
			else
			{
				// convert chunk
				size_t result = convert_buffer_output(scratch.data_char, scratch.data_u8, scratch.data_u16, scratch.data_u32, data, size, encoding);
				assert(result <= sizeof(scratch));

				// write data
				writer.write(scratch.data_u8, result);
			}
		}

		void write_direct(const char_t* data, size_t length)
		{
			// flush the remaining buffer contents
			flush();

			// handle large chunks
			if (length > bufcapacity)
			{
				if (encoding == get_write_native_encoding())
				{
					// fast path, can just write data chunk
					writer.write(data, length * sizeof(char_t));
					return;
				}

				// need to convert in suitable chunks
				while (length > bufcapacity)
				{
					// get chunk size by selecting such number of characters that are guaranteed to fit into scratch buffer
					// and form a complete codepoint sequence (i.e. discard start of last codepoint if necessary)
					size_t chunk_size = get_valid_length(data, bufcapacity);
					assert(chunk_size);

					// convert chunk and write
					flush(data, chunk_size);

					// iterate
					data += chunk_size;
					length -= chunk_size;
				}

				// small tail is copied below
				bufsize = 0;
			}

			memcpy(buffer + bufsize, data, length * sizeof(char_t));
			bufsize += length;
		}

		void write_buffer(const char_t* data, size_t length)
		{
			size_t offset = bufsize;

			if (offset + length <= bufcapacity)
			{
				memcpy(buffer + offset, data, length * sizeof(char_t));
				bufsize = offset + length;
			}
			else
			{
				write_direct(data, length);
			}
		}

		void write_string(const char_t* data)
		{
			// write the part of the string that fits in the buffer
			size_t offset = bufsize;

			while (*data && offset < bufcapacity)
				buffer[offset++] = *data++;

			// write the rest
			if (offset < bufcapacity)
			{
				bufsize = offset;
			}
			else
			{
				// backtrack a bit if we have split the codepoint
				size_t length = offset - bufsize;
				size_t extra = length - get_valid_length(data - length, length);

				bufsize = offset - extra;

				write_direct(data - extra, strlength(data) + extra);
			}
		}

		void write(char_t d0)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 1) offset = flush();

			buffer[offset + 0] = d0;
			bufsize = offset + 1;
		}

		void write(char_t d0, char_t d1)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 2) offset = flush();

			buffer[offset + 0] = d0;
			buffer[offset + 1] = d1;
			bufsize = offset + 2;
		}

		void write(char_t d0, char_t d1, char_t d2)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 3) offset = flush();

			buffer[offset + 0] = d0;
			buffer[offset + 1] = d1;
			buffer[offset + 2] = d2;
			bufsize = offset + 3;
		}

		void write(char_t d0, char_t d1, char_t d2, char_t d3)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 4) offset = flush();

			buffer[offset + 0] = d0;
			buffer[offset + 1] = d1;
			buffer[offset + 2] = d2;
			buffer[offset + 3] = d3;
			bufsize = offset + 4;
		}

		void write(char_t d0, char_t d1, char_t d2, char_t d3, char_t d4)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 5) offset = flush();

			buffer[offset + 0] = d0;
			buffer[offset + 1] = d1;
			buffer[offset + 2] = d2;
			buffer[offset + 3] = d3;
			buffer[offset + 4] = d4;
			bufsize = offset + 5;
		}

		void write(char_t d0, char_t d1, char_t d2, char_t d3, char_t d4, char_t d5)
		{
			size_t offset = bufsize;
			if (offset > bufcapacity - 6) offset = flush();

			buffer[offset + 0] = d0;
			buffer[offset + 1] = d1;
			buffer[offset + 2] = d2;
			buffer[offset + 3] = d3;
			buffer[offset + 4] = d4;
			buffer[offset + 5] = d5;
			bufsize = offset + 6;
		}

		// utf8 maximum expansion: x4 (-> utf32)
		// utf16 maximum expansion: x2 (-> utf32)
		// utf32 maximum expansion: x1
		enum
		{
			bufcapacitybytes =
			#ifdef PUGIXML_MEMORY_OUTPUT_STACK
				PUGIXML_MEMORY_OUTPUT_STACK
			#else
				10240
			#endif
			,
			bufcapacity = bufcapacitybytes / (sizeof(char_t) + 4)
		};

		char_t buffer[bufcapacity];

		union
		{
			uint8_t data_u8[4 * bufcapacity];
			uint16_t data_u16[2 * bufcapacity];
			uint32_t data_u32[bufcapacity];
			char_t data_char[bufcapacity];
		} scratch;

		xml_writer& writer;
		size_t bufsize;
		xml_encoding encoding;
	};

	PUGI__FN void text_output_escaped(xml_buffered_writer& writer, const char_t* s, chartypex_t type)
	{
		while (*s)
		{
			const char_t* prev = s;
			
			// While *s is a usual symbol
			PUGI__SCANWHILE_UNROLL(!PUGI__IS_CHARTYPEX(ss, type));
		
			writer.write_buffer(prev, static_cast<size_t>(s - prev));

			switch (*s)
			{
				case 0: break;
				case '&':
					writer.write('&', 'a', 'm', 'p', ';');
					++s;
					break;
				case '<':
					writer.write('&', 'l', 't', ';');
					++s;
					break;
				case '>':
					writer.write('&', 'g', 't', ';');
					++s;
					break;
				case '"':
					writer.write('&', 'q', 'u', 'o', 't', ';');
					++s;
					break;
				default: // s is not a usual symbol
				{
					unsigned int ch = static_cast<unsigned int>(*s++);
					assert(ch < 32);

					writer.write('&', '#', static_cast<char_t>((ch / 10) + '0'), static_cast<char_t>((ch % 10) + '0'), ';');
				}
			}
		}
	}

	PUGI__FN void text_output(xml_buffered_writer& writer, const char_t* s, chartypex_t type, unsigned int flags)
	{
		if (flags & format_no_escapes)
			writer.write_string(s);
		else
			text_output_escaped(writer, s, type);
	}

	PUGI__FN void text_output_cdata(xml_buffered_writer& writer, const char_t* s)
	{
		do
		{
			writer.write('<', '!', '[', 'C', 'D');
			writer.write('A', 'T', 'A', '[');

			const char_t* prev = s;

			// look for ]]> sequence - we can't output it as is since it terminates CDATA
			while (*s && !(s[0] == ']' && s[1] == ']' && s[2] == '>')) ++s;

			// skip ]] if we stopped at ]]>, > will go to the next CDATA section
			if (*s) s += 2;

			writer.write_buffer(prev, static_cast<size_t>(s - prev));

			writer.write(']', ']', '>');
		}
		while (*s);
	}

	PUGI__FN void text_output_indent(xml_buffered_writer& writer, const char_t* indent, size_t indent_length, unsigned int depth)
	{
		switch (indent_length)
		{
		case 1:
		{
			for (unsigned int i = 0; i < depth; ++i)
				writer.write(indent[0]);
			break;
		}

		case 2:
		{
			for (unsigned int i = 0; i < depth; ++i)
				writer.write(indent[0], indent[1]);
			break;
		}

		case 3:
		{
			for (unsigned int i = 0; i < depth; ++i)
				writer.write(indent[0], indent[1], indent[2]);
			break;
		}

		case 4:
		{
			for (unsigned int i = 0; i < depth; ++i)
				writer.write(indent[0], indent[1], indent[2], indent[3]);
			break;
		}

		default:
		{
			for (unsigned int i = 0; i < depth; ++i)
				writer.write_buffer(indent, indent_length);
		}
		}
	}

	PUGI__FN void node_output_comment(xml_buffered_writer& writer, const char_t* s)
	{
		writer.write('<', '!', '-', '-');

		while (*s)
		{
			const char_t* prev = s;

			// look for -\0 or -- sequence - we can't output it since -- is illegal in comment body
			while (*s && !(s[0] == '-' && (s[1] == '-' || s[1] == 0))) ++s;

			writer.write_buffer(prev, static_cast<size_t>(s - prev));

			if (*s)
			{
				assert(*s == '-');

				writer.write('-', ' ');
				++s;
			}
		}

		writer.write('-', '-', '>');
	}

	PUGI__FN void node_output_pi_value(xml_buffered_writer& writer, const char_t* s)
	{
		while (*s)
		{
			const char_t* prev = s;

			// look for ?> sequence - we can't output it since ?> terminates PI
			while (*s && !(s[0] == '?' && s[1] == '>')) ++s;

			writer.write_buffer(prev, static_cast<size_t>(s - prev));

			if (*s)
			{
				assert(s[0] == '?' && s[1] == '>');

				writer.write('?', ' ', '>');
				s += 2;
			}
		}
	}

	PUGI__FN void node_output_attributes(xml_buffered_writer& writer, xml_node_struct* node, const char_t* indent, size_t indent_length, unsigned int flags, unsigned int depth)
	{
		const char_t* default_name = PUGIXML_TEXT(":anonymous");

		for (xml_attribute_struct* a = node->first_attribute; a; a = a->next_attribute)
		{
			if ((flags & (format_indent_attributes | format_raw)) == format_indent_attributes)
			{
				writer.write('\n');

				text_output_indent(writer, indent, indent_length, depth + 1);
			}
			else
			{
				writer.write(' ');
			}

			writer.write_string(a->name ? a->name + 0 : default_name);
			writer.write('=', '"');

			if (a->value)
				text_output(writer, a->value, ctx_special_attr, flags);

			writer.write('"');
		}
	}

	PUGI__FN bool node_output_start(xml_buffered_writer& writer, xml_node_struct* node, const char_t* indent, size_t indent_length, unsigned int flags, unsigned int depth)
	{
		const char_t* default_name = PUGIXML_TEXT(":anonymous");
		const char_t* name = node->name ? node->name + 0 : default_name;

		writer.write('<');
		writer.write_string(name);