--- /dev/null
+#ifndef XML_TREE_HPP_
+#define XML_TREE_HPP_
+
+
+#include <cstdint>
+#include <unordered_set>
+#include <unordered_map>
+#include <bp/bp.h>
+#include <bp/bp-darray.h>
+#include <libcds/includes/basics.h>
+#include <libcds/includes/static_bitsequence.h>
+#include <libcds/includes/alphabet_mapper.h>
+#include <libcds/includes/static_sequence.h>
+#include "bit-vector.hpp"
+
+#undef W
+#undef Wminusone
+#undef WW
+
+#include <TextCollection/TextCollection.h>
+#include <TextCollection/TextCollectionBuilder.h>
+
+class xml_tree_builder;
+
+class xml_tree {
+public:
+ typedef int32_t node_t;
+ typedef int32_t tag_t;
+
+ static const node_t NIL = -1;
+ static const node_t ROOT = 0;
+
+ static const char* NIL_TAG;
+ static const tag_t NIL_TAG_ID = -1;
+ static const char* DOCUMENT_OPEN_TAG;
+ static const tag_t DOCUMENT_OPEN_TAG_ID = 0;
+ static const char* ATTRIBUTE_OPEN_TAG;
+ static const tag_t ATTRIBUTE_OPEN_TAG_ID = 1;
+ static const char* PCDATA_OPEN_TAG;
+ static const tag_t PCDATA_OPEN_TAG_ID = 2;
+ static const char* ATTRIBUTE_DATA_OPEN_TAG;
+ static const tag_t ATTRIBUTE_DATA_OPEN_TAG_ID = 3;
+ static const char* CLOSE_TAG;
+ static const tag_t CLOSE_TAG_ID = 4;
+
+
+ ~xml_tree();
+
+ //Counting functions
+ inline uint32_t size() const;
+ inline uint32_t num_tags() const;
+ inline uint32_t subtree_size(node_t) const;
+ inline uint32_t subtree_tags(node_t, tag_t) const;
+ uint32_t subtree_elements(node_t) const;
+ uint32_t num_children(node_t) const;
+ uint32_t child_pos(node_t) const;
+
+
+ //Node_T tests
+ inline bool is_leaf(node_t) const;
+ inline bool is_ancestor(node_t, node_t) const;
+ inline bool is_right_descendant(node_t, node_t) const;
+ bool is_child(node_t, node_t) const;
+ inline bool is_first_child(node_t) const;
+ inline bool is_nil(node_t) const;
+
+ uint32_t depth(node_t) const;
+ uint32_t preorder(node_t) const;
+ uint32_t postorder(node_t) const;
+
+ //Tag functions
+ inline tag_t tag(node_t) const;
+ const char* get_tag_name_by_ref(tag_t) const;
+ tag_t register_tag(char *s);
+
+ //Navigation functions
+ inline node_t root () const;
+ node_t child(node_t, uint32_t) const;
+ inline node_t parent(node_t) const;
+ inline node_t first_child(node_t) const;
+ inline node_t last_child(node_t) const;
+ inline node_t next_sibling(node_t) const;
+ inline node_t prev_sibling(node_t) const;
+ inline node_t first_element(node_t) const;
+ inline node_t next_element(node_t) const;
+ inline node_t tagged_next(node_t, tag_t) const;
+ inline node_t tagged_descendant(node_t, tag_t) const;
+ inline node_t tagged_following_before(node_t, tag_t, node_t) const;
+ inline node_t tagged_child(node_t, tag_t) const;
+ inline node_t tagged_sibling(node_t, tag_t) const;
+ node_t select_child(node_t, std::unordered_set<tag_t>*) const;
+ node_t select_descendant(node_t, std::unordered_set<tag_t>*) const;
+ node_t select_sibling(node_t, std::unordered_set<tag_t>*) const;
+ node_t select_following_before (node_t,
+ std::unordered_set<tag_t>*, node_t) const;
+ inline node_t closing(node_t) const;
+
+ //Text functions
+ inline node_t parent_node(int32_t) const;
+ inline SXSI::TextCollection *get_text_collection() const;
+ std::pair<int32_t, int32_t> text_id_range(node_t) const;
+ int32_t text_id(node_t) const;
+ unsigned char* get_text(int32_t) const;
+
+ SXSI::TextCollection::document_result prefix(uchar const *s) const;
+ SXSI::TextCollection::document_result suffix(uchar const *s) const;
+ SXSI::TextCollection::document_result equals(uchar const *s) const;
+ SXSI::TextCollection::document_result contains(uchar const *s) const;
+ SXSI::TextCollection::document_result less_than(uchar const *s) const;
+
+ //I/O functions
+ void save(int, char*);
+ static xml_tree* load(int, char*, bool, int);
+ void print(int, node_t, bool no_text=false);
+ void flush(int);
+
+private:
+ friend class xml_tree_builder;
+ xml_tree();
+ xml_tree(std::vector<int32_t>*,
+ std::unordered_map<std::string, int32_t>*,
+ bit_vector*,
+ bool,
+ SXSI::TextCollectionBuilder *,
+ SXSI::TextCollectionBuilder::index_type_t,
+ bit_vector*);
+
+ //Parenthesis sequence
+ bp *par;
+ //tag sequence
+ static_sequence *tags;
+ uint32_t *tag_seq;
+ uint32_t tag_seq_len;
+ uint32_t bits_per_tag;
+ //Mapping from tag_t identifiers to/from tagnames
+ std::vector<std::string> *tag_names;
+ std::unordered_map<std::string, tag_t> *tag_ids;
+ //Text index
+ SXSI::TextCollection *text_collection;
+ static_bitsequence *text_positions;
+ SXSI::TextCollectionBuilder::index_type_t text_index_type;
+ //auxiliary data structures for efficient printing.
+ std::vector<std::string> *print_stack;
+ std::string *print_buffer;
+
+#define BUFFER_SIZE (8192*2)
+
+ void uflush(int);
+ void uflush_r(int, size_t);
+ void uput_str(std::string s, int fd);
+ void uputs(const char* s, int fd);
+ void uputc(const char c, int fd);
+ size_t uprintf(const char*s, int fd);
+};
+
+#define XML_TREE_INTERNAL__ 1
+#include "xml-tree-inc.hpp"
+
+#endif //XML_TREE_HPP_