4 // functions to convert tag positions to the corresponding tree node and viceversa.
\r
5 // These are implemented in order to be able to change the tree and Tags representations,
\r
6 // without affecting the code so much.
\r
7 // Current implementation corresponds to balanced-parentheses representation for
\r
8 // the tree, and storing 2 tags per tree node (opening and closing tags).
\r
10 // tag position -> tree node
\r
11 inline treeNode tagpos2node(int t) {
\r
15 // tree node -> tag position
\r
16 inline int node2tagpos(treeNode x) {
\r
21 //KIM OJO to prevent suprious "unused result" warnings
\r
23 inline void ufread(void *ptr, size_t size, size_t nmemb, FILE *stream){
\r
25 res = fread(ptr,size,nmemb,stream);
\r
27 throw "ufread I/O error";
\r
32 inline void ufwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream){
\r
34 res = fwrite(ptr,size,nmemb,stream);
\r
36 throw "ufwrite I/O error";
\r
40 // OJO to fail cleanly while doing a realloc
\r
41 // if we can't realloc we are pretty much screwed anyway but
\r
42 // it makes the code clearer to not have a bunch of if (!ptr) { printf("..."); exit(1); };
\r
43 inline void * urealloc(void *ptr, size_t size){
\r
45 void * dest = realloc(ptr,size);
\r
46 //don't fail if we requested size 0
\r
47 if (dest == NULL && size > 0 )
\r
48 throw std::bad_alloc();
\r
53 inline void * ucalloc(size_t nmemb, size_t size){
\r
55 void * dest = calloc(nmemb,size);
\r
56 //don't fail if we requested size 0
\r
57 if (dest == NULL && nmemb > 0 && size > 0 )
\r
58 throw std::bad_alloc();
\r
63 inline void * umalloc(size_t size){
\r
64 void * dest = malloc(size);
\r
65 if (dest == NULL && size > 0)
\r
66 throw std::bad_alloc();
\r
70 // Save: saves XML tree data structure to file.
\r
71 void XMLTree::Save(unsigned char *filename)
\r
75 char filenameaux[1024];
\r
78 sprintf(filenameaux, "%s.srx", filename);
\r
79 fp = fopen(filenameaux, "w");
\r
81 printf("Error: cannot create file %s to store the tree structure of XML collection\n", filenameaux);
\r
85 // first stores the tree topology
\r
88 // stores the table with tag names
\r
89 ufwrite(&ntagnames, sizeof(int), 1, fp);
\r
90 for (i=0; i<ntagnames;i++)
\r
91 fprintf(fp, "%s\n",TagName[i]);
\r
95 ufwrite(&indexing_empty_texts, sizeof(bool), 1, fp);
\r
96 ufwrite(&initialized, sizeof(bool), 1, fp);
\r
97 ufwrite(&finished, sizeof(bool), 1, fp);
\r
98 ufwrite(&disable_tc, sizeof(bool),1,fp);
\r
100 if (!indexing_empty_texts) EBVector->save(fp);
\r
105 // stores the texts
\r
114 // Load: loads XML tree data structure from file. Returns
\r
115 // a pointer to the loaded data structure
\r
116 XMLTree *XMLTree::Load(unsigned char *filename, int sample_rate_text)
\r
127 // first load the tree topology
\r
128 sprintf(buffer, "%s.srx", filename);
\r
129 fp = fopen(buffer, "r");
\r
131 printf("Error: cannot open file %s to load the tree structure of XML collection\n", buffer);
\r
135 XML_Tree = new XMLTree();
\r
137 XML_Tree->Par = (bp *)umalloc(sizeof(bp));
\r
139 loadTree(XML_Tree->Par, fp);
\r
141 s_tree += sizeof(bp);
\r
143 // stores the table with tag names
\r
144 ufread(&XML_Tree->ntagnames, sizeof(int), 1, fp);
\r
146 s_tree += sizeof(int);
\r
148 XML_Tree->TagName = (unsigned char **)umalloc(XML_Tree->ntagnames*sizeof(unsigned char *));
\r
150 s_tags += sizeof(unsigned char*)*XML_Tree->ntagnames;
\r
153 for (i=0; i<XML_Tree->ntagnames;i++) {
\r
155 // OJO Kim is it needed ?
\r
159 // fscanf chokes on "\n" which is the case for the root element
\r
160 char * r = fgets(buffer,1023,fp);
\r
161 // int r = fscanf(fp, "%s\n",buffer);
\r
163 throw "Cannot read tag list";
\r
165 // strlen is actually the right size, since there is a trailing '\n'
\r
166 int len = strlen((const char*)buffer);
\r
167 XML_Tree->TagName[i] = (unsigned char *)ucalloc(len,sizeof(char));
\r
168 strncpy((char *)XML_Tree->TagName[i], (const char *)buffer,len - 1);
\r
169 s_tags+= len*sizeof(char);
\r
174 ufread(&(XML_Tree->indexing_empty_texts), sizeof(bool), 1, fp);
\r
175 ufread(&(XML_Tree->initialized), sizeof(bool), 1, fp);
\r
176 ufread(&(XML_Tree->finished), sizeof(bool), 1, fp);
\r
177 ufread(&(XML_Tree->disable_tc), sizeof(bool), 1, fp);
\r
179 s_tree+=sizeof(bool)*4;
\r
181 if (!(XML_Tree->indexing_empty_texts)) XML_Tree->EBVector = static_bitsequence_rrr02::load(fp);
\r
183 s_tree+= XML_Tree->EBVector->size();
\r
186 XML_Tree->Tags = static_sequence::load(fp);
\r
187 s_tree+= XML_Tree->Tags->size();
\r
189 s_text = ftell(fp);
\r
192 if (!XML_Tree->disable_tc){
\r
193 XML_Tree->Text = TextCollection::InitTextCollection(sample_rate_text);
\r
194 XML_Tree->Text->Load(fp,sample_rate_text);
\r
197 XML_Tree->Text = NULL;
\r
199 s_text = ftell(fp) - s_text;
\r
202 std::cerr << "Tree part is " << s_tree/1024 << " Kbytes,\n"
\r
203 << "with node->tagid part " << XML_Tree->Tags->size()/1024 << "Kbytes \n"
\r
204 << "size of Tag part : " << XML_Tree->Tags->length () << " elements\n"
\r
205 << "sizof(unsigned int)* " << XML_Tree->Tags->length () << " = " <<
\r
206 sizeof(unsigned int) * XML_Tree->Tags->length () / 1024 << " Kbytes\n"
\r
207 << "Tag part is " << s_tags/1024 << " Kbytes,\n"
\r
208 << "Text collection is " << s_text/1024 << " Kbytes \n";
\r
213 // ~XMLTree: frees memory of XML tree.
\r
214 XMLTree::~XMLTree()
\r
219 free(Par); // frees the memory of struct Par
\r
221 for (i=0; i<ntagnames;i++)
\r
226 if (!indexing_empty_texts) {
\r
227 //EBVector->~static_bitsequence_rrr02();
\r
232 //Tags->~static_sequence_wvtree();
\r
236 //Text->~TextCollection();
\r
240 initialized = false;
\r
244 // root(): returns the tree root.
\r
245 treeNode XMLTree::Root()
\r
248 fprintf(stderr, "Root() : Error: data structure has not been constructed properly\n");
\r
251 return root_node(Par);
\r
254 // SubtreeSize(x): the number of nodes (and attributes) in the subtree of node x.
\r
255 int XMLTree::SubtreeSize(treeNode x)
\r
258 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
261 return subtree_size(Par, x);
\r
264 // SubtreeTags(x,tag): the number of occurrences of tag within the subtree of node x.
\r
265 int XMLTree::SubtreeTags(treeNode x, TagType tag)
\r
268 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
272 int s = x + 2*subtree_size(Par, x) - 1;
\r
274 return Tags->rank(tag, s) - Tags->rank(tag, node2tagpos(x)-1);
\r
277 // IsLeaf(x): returns whether node x is leaf or not. In the succinct representation
\r
278 // this is just a bit inspection.
\r
279 bool XMLTree::IsLeaf(treeNode x)
\r
281 return isleaf(Par, x);
\r
284 // IsAncestor(x,y): returns whether node x is ancestor of node y.
\r
285 bool XMLTree::IsAncestor(treeNode x, treeNode y)
\r
288 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
292 return is_ancestor(Par, x, y);
\r
295 // IsChild(x,y): returns whether node x is parent of node y.
\r
296 bool XMLTree::IsChild(treeNode x, treeNode y)
\r
299 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
303 if (!is_ancestor(Par, x, y)) return false;
\r
304 return depth(Par, x) == (depth(Par, y) + 1);
\r
307 // NumChildren(x): number of children of node x. Constant time with the data structure
\r
309 int XMLTree::NumChildren(treeNode x)
\r
312 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
316 return degree(Par, x);
\r
319 // ChildNumber(x): returns i if node x is the i-th children of its parent.
\r
320 int XMLTree::ChildNumber(treeNode x)
\r
323 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
327 return child_rank(Par, x);
\r
330 // Depth(x): depth of node x, a simple binary rank on the parentheses sequence.
\r
331 int XMLTree::Depth(treeNode x)
\r
334 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
338 return depth(Par, x);
\r
341 // Preorder(x): returns the preorder number of node x, just counting the tree
\r
342 // nodes (i.e., tags, it disregards the texts in the tree).
\r
343 int XMLTree::Preorder(treeNode x)
\r
346 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
350 return preorder_rank(Par, x);
\r
353 // Postorder(x): returns the postorder number of node x, just counting the tree
\r
354 // nodes (i.e., tags, it disregards the texts in the tree).
\r
355 int XMLTree::Postorder(treeNode x)
\r
358 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
361 return postorder_rank(Par, x);
\r
364 // Tag(x): returns the tag identifier of node x.
\r
365 TagType XMLTree::Tag(treeNode x)
\r
368 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
372 return Tags->access(node2tagpos(x));
\r
375 // DocIds(x): returns the range of text identifiers that descend from node x.
\r
376 // returns {NULLT, NULLT} when there are no texts descending from x.
\r
377 range XMLTree::DocIds(treeNode x)
\r
380 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
385 if (indexing_empty_texts) { // faster, no rank needed
\r
387 r.max = x+2*subtree_size(Par, x)-2;
\r
389 else { // we are not indexing empty texts, we need rank
\r
390 int min = EBVector->rank1(x-1);
\r
391 int max = EBVector->rank1(x+2*subtree_size(Par, x)-2);
\r
392 if (min==max) { // range is empty, no texts within the subtree of x
\r
396 else { // the range is non-empty, there are texts within the subtree of x
\r
404 // Parent(x): returns the parent node of node x.
\r
405 treeNode XMLTree::Parent(treeNode x)
\r
408 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
414 return parent(Par, x);
\r
417 // Child(x,i): returns the i-th child of node x, assuming it exists.
\r
418 treeNode XMLTree::Child(treeNode x, int i)
\r
421 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
425 if (i <= OPTD) return naive_child(Par, x, i);
\r
426 else return child(Par, x, i);
\r
429 // FirstChild(x): returns the first child of node x, assuming it exists. Very fast in BP.
\r
430 treeNode XMLTree::FirstChild(treeNode x)
\r
433 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
437 return first_child(Par, x);
\r
440 // NextSibling(x): returns the next sibling of node x, assuming it exists.
\r
441 treeNode XMLTree::NextSibling(treeNode x)
\r
444 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
450 return next_sibling(Par, x);
\r
453 // PrevSibling(x): returns the previous sibling of node x, assuming it exists.
\r
454 treeNode XMLTree::PrevSibling(treeNode x)
\r
457 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
461 return prev_sibling(Par, x);
\r
464 // TaggedChild(x,i,tag): returns the i-th child of node x tagged tag, or NULLT if there is none.
\r
465 // Because of the balanced-parentheses representation of the tree, this operation is not supported
\r
466 // efficiently, just iterating among the children of node x until finding the desired child.
\r
467 treeNode XMLTree::TaggedChild(treeNode x, int i, TagType tag)
\r
470 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
476 child = first_child(Par, x); // starts at first child of node x
\r
477 if (child==(treeNode)-1) return NULLT; // node x is a leaf, there is no such child
\r
478 while (child!=(treeNode)-1) {
\r
479 if (Tags->access(node2tagpos(child)) == tag) { // current child is labeled with tag of interest
\r
481 if (i==0) return child; // we have seen i children of x tagged tag, this is the one we are looking for
\r
483 child = next_sibling(Par, x); // OK, let's try with the next child
\r
485 return NULLT; // no such child was found
\r
488 // TaggedDesc(x,tag): returns the first node tagged tag with larger preorder than x and within
\r
489 // the subtree of x. Returns NULLT if there is none.
\r
490 treeNode XMLTree::TaggedDesc(treeNode x, TagType tag)
\r
493 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
499 r = (int) Tags->rank(tag, node2tagpos(x));
\r
500 s = (int) Tags->select(tag, r+1);
\r
501 if (s == -1) return NULLT; // there is no such node
\r
502 y = tagpos2node(s); // transforms the tag position into a node position
\r
503 if (!is_ancestor(Par, x, y)) return NULLT; // the next node tagged tag (in preorder) is not within the subtree of x.
\r
507 // TaggedPrec(x,tag): returns the first node tagged tag with smaller preorder than x and not an
\r
508 // ancestor of x. Returns NULLT if there is none.
\r
509 treeNode XMLTree::TaggedPrec(treeNode x, TagType tag)
\r
512 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
517 treeNode node_s, root;
\r
518 r = (int)Tags->rank(tag, node2tagpos(x)-1);
\r
519 if (r==0) return NULLT; // there is no such node.
\r
520 s = (int)Tags->select(tag, r);
\r
521 root = root_node(Par);
\r
522 node_s = tagpos2node(s);
\r
523 while (is_ancestor(Par, node_s, x) && (node_s!=root)) { // the one that we found is an ancestor of x
\r
525 if (r==0) return NULLT; // there is no such node
\r
526 s = (int)Tags->select(tag, r); // we should use select_prev instead when provided
\r
527 node_s = tagpos2node(s);
\r
529 return NULLT; // there is no such node
\r
532 // TaggedFoll(x,tag): returns the first node tagged tag with larger preorder than x and not in
\r
533 // the subtree of x. Returns NULLT if there is none.
\r
534 treeNode XMLTree::TaggedFoll(treeNode x, TagType tag)
\r
537 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
542 r = (int) Tags->rank(tag, node2tagpos(next_sibling(Par, x))-1);
\r
543 s = (int) Tags->select(tag, r+1); // select returns -1 in case that there is no r+1-th tag.
\r
544 if (s==-1) return NULLT;
\r
545 else return tagpos2node(s);
\r
548 // PrevText(x): returns the document identifier of the text to the left
\r
549 // of node x, or NULLT if x is the root node or the text is empty.
\r
550 // Assumes Doc ids start from 0.
\r
551 DocID XMLTree::PrevText(treeNode x)
\r
554 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
558 if (x == Root()) return NULLT;
\r
559 if (indexing_empty_texts) // faster, no rank needed
\r
561 else { // we are not indexing empty texts, rank is needed
\r
562 if (EBVector->access(x-1) == 0)
\r
563 return (DocID)NULLT; // there is no text to the left of node (text is empty)
\r
565 return (DocID)EBVector->rank1(x-1)-1; //-1 because document ids start from 0
\r
569 // NextText(x): returns the document identifier of the text to the right
\r
570 // of node x, or NULLT if x is the root node. Assumes Doc ids start from 0.
\r
571 DocID XMLTree::NextText(treeNode x)
\r
574 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
578 if (x == Root()) return NULLT;
\r
579 if (indexing_empty_texts) // faster, no rank needed
\r
580 return (DocID)x+2*subtree_size(Par, x)-1;
\r
581 else { // we are not indexing empty texts, rank is needed
\r
582 int p = x+2*subtree_size(Par, x)-1;
\r
583 if (EBVector->access(p) == 0) // there is no text to the right of node
\r
584 return (DocID)NULLT;
\r
586 return (DocID)EBVector->rank1(p)-1; //-1 because document ids start from 0
\r
590 // MyText(x): returns the document identifier of the text below node x,
\r
591 // or NULLT if x is not a leaf node or the text is empty. Assumes Doc
\r
592 // ids start from 0.
\r
593 DocID XMLTree::MyText(treeNode x)
\r
596 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
600 if (!IsLeaf(x)) return NULLT;
\r
601 if (indexing_empty_texts) // faster, no rank needed
\r
603 else { // we are not indexing empty texts, rank is needed
\r
604 if (EBVector->access(x) == 0) // there is no text below node x
\r
605 return (DocID)NULLT;
\r
607 return (DocID)EBVector->rank1(x)-1; //-1 because document ids start from 0
\r
611 // TextXMLId(d): returns the preorder of document with identifier d in the tree consisting of
\r
612 // all tree nodes and all text nodes. Assumes that the tree root has preorder 1.
\r
613 int XMLTree::TextXMLId(DocID d)
\r
616 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
620 if (indexing_empty_texts)
\r
621 return d + rank_open(Par, d)+1; // +1 because root has preorder 1
\r
622 else { // slower, needs rank and select
\r
623 int s = EBVector->select1(d+1);
\r
624 return rank_open(Par, s) + d + 1; // +1 because root has preorder 1
\r
628 // NodeXMLId(x): returns the preorder of node x in the tree consisting
\r
629 // of all tree nodes and all text nodes. Assumes that the tree root has
\r
631 int XMLTree::NodeXMLId(treeNode x)
\r
634 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
638 if (indexing_empty_texts)
\r
639 return x - 1 + rank_open(Par, x);
\r
641 if (x == Root()) return 1; // root node has preorder 1
\r
643 return rank_open(Par, x) + EBVector->rank1(x-1);
\r
647 // ParentNode(d): returns the parent node of document identifier d.
\r
648 treeNode XMLTree::ParentNode(DocID d)
\r
651 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
659 // OJO : Kim : I added the d+1. before that, else branch was
\r
660 // EBVector->select1(d)
\r
661 // and gave wrong results (I'm really poking a bear with a stick here).
\r
662 if (indexing_empty_texts) s = d;
\r
663 else s = EBVector->select1(d+1);
\r
665 if (inspect(Par,s) == CP) // is a closing parenthesis
\r
666 return parent(Par, find_open(Par, s));
\r
667 else // is an opening parenthesis
\r
668 return (treeNode)s;
\r
673 // OpenDocument(empty_texts): it starts the construction of the data structure for
\r
674 // the XML document. Parameter empty_texts indicates whether we index empty texts
\r
675 // in document or not. Returns a non-zero value upon success, NULLT in case of error.
\r
676 int XMLTree::OpenDocument(bool empty_texts, int sample_rate_text,bool dtc)
\r
678 initialized = true;
\r
680 found_attributes = false;
\r
686 indexing_empty_texts = empty_texts;
\r
688 par_aux = (pb *)umalloc(sizeof(pb)*parArraySize);
\r
690 tags_aux = (TagType *) umalloc(sizeof(TagType));
\r
692 TagName = (unsigned char **) umalloc(2*sizeof(unsigned char*));
\r
694 TagName[0] = (unsigned char *) umalloc(4*sizeof(unsigned char));
\r
696 strcpy((char *) TagName[0], "<@>");
\r
698 TagName[1] = (unsigned char *) umalloc(4*sizeof(unsigned char));
\r
700 strcpy((char *) TagName[1], "<$>");
\r
703 if (!indexing_empty_texts)
\r
704 empty_texts_aux = (unsigned int *)umalloc(sizeof(unsigned int));
\r
708 Text = TextCollection::InitTextCollection((unsigned)sample_rate_text);
\r
710 return 1; // indicates success in the initialization of the data structure
\r
713 // CloseDocument(): it finishes the construction of the data structure for the XML
\r
714 // document. Tree and tags are represented in the final form, dynamic data
\r
715 // structures are made static, and the flag "finished" is set to true. After that,
\r
716 // the data structure can be queried.
\r
717 int XMLTree::CloseDocument()
\r
719 if (!initialized) { // data structure has not been initialized properly
\r
720 fprintf(stderr, "Error: data structure has not been initialized properly (by calling method OpenDocument)\n");
\r
724 // closing parenthesis for the tree root
\r
725 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*(1+npar/(8*sizeof(pb))));
\r
727 // creates the data structure for the tree topology
\r
728 Par = (bp *)umalloc(sizeof(bp));
\r
729 bp_construct(Par, npar, par_aux, OPT_DEGREE|0);
\r
730 // creates structure for tags
\r
731 static_bitsequence_builder * bmb = new static_bitsequence_builder_brw32(20);
\r
732 static_permutation_builder * pmb = new static_permutation_builder_mrrr(PERM_SAMPLE, bmb);
\r
733 static_sequence_builder * ssb = new static_sequence_builder_gmr_chunk(bmb, pmb);
\r
736 // If we found an attribute then "<@>" is present in the tree
\r
737 // if we didn't then it is not. "<$>" is never present in the tree
\r
738 int ntagsize = found_attributes ? 2*ntagnames-1 : 2*ntagnames - 2;
\r
740 Tags = new static_sequence_gmr((uint *) tags_aux, (uint) npar-1,ntagsize, bmb, ssb);
\r
745 // makes the text collection static
\r
747 Text->MakeStatic();
\r
749 // creates the data structure marking the non-empty texts (just in the case it is necessary)
\r
750 if (!indexing_empty_texts) {
\r
751 EBVector = new static_bitsequence_rrr02((uint *)empty_texts_aux,(ulong)npar,(uint)32);
\r
752 free (empty_texts_aux);
\r
753 empty_texts_aux = NULL;
\r
756 // OJO was leaked before, found by valgrind
\r
763 return 1; // indicates success in the inicialization
\r
767 // NewOpenTag(tagname): indicates the event of finding a new opening tag in the document.
\r
768 // Tag name is given. Returns a non-zero value upon success, and returns NULLT
\r
769 // in case of failing when trying to insert the new tag.
\r
770 int XMLTree::NewOpenTag(unsigned char *tagname)
\r
774 if (!initialized) { // data structure has not been initialized properly
\r
775 fprintf(stderr, "Error: you cannot insert a new opening tag without first calling method OpenDocument first\n");
\r
779 // inserts a new opening parentheses in the bit sequence
\r
780 if (sizeof(pb)*8*parArraySize == npar) { // no space left for the new parenthesis
\r
781 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*2*parArraySize);
\r
785 setbit(par_aux,npar,OP); // marks a new opening parenthesis
\r
787 // transforms the tagname into a tag identifier. If the tag is new, we insert
\r
788 // it in the table.
\r
789 for (i=0; i<ntagnames; i++)
\r
790 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
\r
793 // NewOpenTag("<@>") was called
\r
795 found_attributes=true;
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797 if (i==ntagnames) { // the tag is a new one, then we insert it
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798 TagName = (unsigned char **)urealloc(TagName, sizeof(char *)*(ntagnames+1));
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801 fprintf(stderr, "Error: not enough memory\n");
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806 TagName[i] = (unsigned char *)umalloc(sizeof(unsigned char)*(strlen((const char *)tagname)+1));
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807 strcpy((char *)TagName[i], (const char *)tagname);
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809 tags_aux = (TagType *) urealloc(tags_aux, sizeof(TagType)*(npar + 1));
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811 tags_aux[npar] = i; // inserts the new tag id within the preorder sequence of tags
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820 // NewClosingTag(tagname): indicates the event of finding a new closing tag in the document.
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821 // Tag name is given. Returns a non-zero value upon success, and returns NULLT
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822 // in case of failing when trying to insert the new tag.
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823 int XMLTree::NewClosingTag(unsigned char *tagname)
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827 if (!initialized) { // data structure has not been initialized properly
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828 fprintf(stderr, "Error: you cannot insert a new closing tag without first calling method OpenDocument first\n");
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832 // inserts a new closing parentheses in the bit sequence
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833 if (sizeof(pb)*8*parArraySize == npar) { // no space left for the new parenthesis
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834 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*2*parArraySize);
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838 setbit(par_aux,npar,CP); // marks a new closing opening parenthesis
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840 // transforms the tagname into a tag identifier. If the tag is new, we insert
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841 // it in the table.
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842 for (i=0; i<ntagnames; i++)
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843 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
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845 if (i==ntagnames) { // the tag is a new one, then we insert it
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846 TagName = (unsigned char **)urealloc(TagName, sizeof(char *)*(ntagnames+1));
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850 TagName[i] = (unsigned char *)umalloc(sizeof(char)*(strlen((const char *)tagname)+2));
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851 TagName[i][0] = '/';
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852 strcpy((char *)&(TagName[i][1]), (const char *)tagname);
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855 tags_aux = (TagType *)urealloc(tags_aux, sizeof(TagType)*(npar + 1));
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857 tags_aux[npar] = i; // inserts the new tag id within the preorder sequence of tags
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861 return 1; // success
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866 // NewText(s): indicates the event of finding a new (non-empty) text s in the document.
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867 // The new text is inserted within the text collection. Returns a non-zero value upon
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868 // success, NULLT in case of error.
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869 int XMLTree::NewText(unsigned char *s)
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871 if (!initialized) { // data structure has not been initialized properly
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872 fprintf(stderr, "Error: you cannot insert a new text without first calling method OpenDocument first\n");
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877 XMLTree::NewEmptyText();
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881 if (!indexing_empty_texts) {
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882 empty_texts_aux = (unsigned int *)urealloc(empty_texts_aux, sizeof(pb)*(1+(npar-1)/(8*sizeof(pb))));
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883 bitset(empty_texts_aux, npar-1); // marks the non-empty text with a 1 in the bit vector
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886 Text->InsertText(s);
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888 return 1; // success
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891 // NewEmptyText(): indicates the event of finding a new empty text in the document.
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892 // In case of indexing empty and non-empty texts, we insert the empty texts into the
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893 // text collection. In case of indexing only non-empty texts, it just indicates an
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894 // empty text in the bit vector of empty texts. Returns a non-zero value upon
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895 // success, NULLT in case of error.
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896 int XMLTree::NewEmptyText()
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898 unsigned char c = 0;
\r
899 if (!initialized) { // data structure has not been initialized properly
\r
900 fprintf(stderr, "Error: you cannot insert a new empty text without first calling method OpenDocument first\n");
\r
904 if (!indexing_empty_texts) {
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905 empty_texts_aux = (unsigned int *)urealloc(empty_texts_aux, sizeof(pb)*(1+(npar-1)/(8*sizeof(pb))));
\r
907 bitclean(empty_texts_aux, npar-1); // marks the empty text with a 0 in the bit vector
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909 else Text->InsertText(&c); // we insert the empty text just in case we index all the texts
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911 return 1; // success
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915 // GetTagId: returns the tag identifier corresponding to a given tag name.
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916 // Returns NULLT in case that the tag name does not exists.
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917 TagType XMLTree::GetTagId(unsigned char *tagname)
\r
920 // this should be changed for more efficient processing
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921 for (i=0; i<ntagnames; i++)
\r
922 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
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923 if (i==ntagnames) return (TagType)NULLT; // tagname does not exists in the table
\r
928 // GetTagName(tagid): returns the tag name of a given tag identifier.
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929 // Returns NULL in case that the tag identifier is not valid.
\r
930 unsigned char *XMLTree::GetTagName(TagType tagid)
\r
934 if (tagid >= ntagnames) return NULL; // invalid tag identifier
\r
935 s = (unsigned char *)umalloc((strlen((const char *)TagName[tagid])+1)*sizeof(unsigned char));
\r
936 strcpy((char *)s, (const char *)TagName[tagid]);
\r
941 //KIM : OJO need the two following methods
\r
943 const unsigned char *XMLTree::GetTagNameByRef(TagType tagid)
\r
945 if (tagid >= ntagnames) return NULL; // invalid tag identifier
\r
946 return ((const unsigned char*) TagName[tagid]);
\r
951 TagType XMLTree::RegisterTag(unsigned char *tagname)
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956 TagType id = XMLTree::GetTagId(tagname);
\r
959 ntagnames = ntagnames + 1;
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960 TagName = (unsigned char **) urealloc(TagName,ntagnames*(sizeof(unsigned char*)));
\r
961 TagName[id] = (unsigned char *) umalloc(sizeof(unsigned char)*strlen( (const char*) tagname)+1);
\r
962 strcpy((char*)TagName[id], (const char *)tagname);
\r