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
188 s_tree+= XML_Tree->Tags->size();
\r
190 s_text = ftell(fp);
\r
193 if (!XML_Tree->disable_tc){
\r
194 XML_Tree->Text = TextCollection::InitTextCollection(sample_rate_text);
\r
195 XML_Tree->Text->Load(fp,sample_rate_text);
\r
198 XML_Tree->Text = NULL;
\r
200 s_text = ftell(fp) - s_text;
\r
203 std::cerr << "Tree part is " << s_tree/1024 << " Kbytes,\n"
\r
204 << "Tag part is " << s_tags/1024 << " Kbytes,\n"
\r
205 << "Text collection is " << s_text/1024 << " Kbytes \n";
\r
210 // ~XMLTree: frees memory of XML tree.
\r
211 XMLTree::~XMLTree()
\r
216 free(Par); // frees the memory of struct Par
\r
218 for (i=0; i<ntagnames;i++)
\r
223 if (!indexing_empty_texts) {
\r
224 //EBVector->~static_bitsequence_rrr02();
\r
229 //Tags->~static_sequence_wvtree();
\r
233 //Text->~TextCollection();
\r
237 initialized = false;
\r
241 // root(): returns the tree root.
\r
242 treeNode XMLTree::Root()
\r
245 fprintf(stderr, "Root() : Error: data structure has not been constructed properly\n");
\r
248 return root_node(Par);
\r
251 // SubtreeSize(x): the number of nodes (and attributes) in the subtree of node x.
\r
252 int XMLTree::SubtreeSize(treeNode x)
\r
255 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
258 return subtree_size(Par, x);
\r
261 // SubtreeTags(x,tag): the number of occurrences of tag within the subtree of node x.
\r
262 int XMLTree::SubtreeTags(treeNode x, TagType tag)
\r
265 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
269 int s = x + 2*subtree_size(Par, x) - 1;
\r
271 return Tags->rank(tag, s) - Tags->rank(tag, node2tagpos(x)-1);
\r
274 // IsLeaf(x): returns whether node x is leaf or not. In the succinct representation
\r
275 // this is just a bit inspection.
\r
276 bool XMLTree::IsLeaf(treeNode x)
\r
278 return isleaf(Par, x);
\r
281 // IsAncestor(x,y): returns whether node x is ancestor of node y.
\r
282 bool XMLTree::IsAncestor(treeNode x, treeNode y)
\r
285 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
289 return is_ancestor(Par, x, y);
\r
292 // IsChild(x,y): returns whether node x is parent of node y.
\r
293 bool XMLTree::IsChild(treeNode x, treeNode y)
\r
296 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
300 if (!is_ancestor(Par, x, y)) return false;
\r
301 return depth(Par, x) == (depth(Par, y) + 1);
\r
304 // NumChildren(x): number of children of node x. Constant time with the data structure
\r
306 int XMLTree::NumChildren(treeNode x)
\r
309 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
313 return degree(Par, x);
\r
316 // ChildNumber(x): returns i if node x is the i-th children of its parent.
\r
317 int XMLTree::ChildNumber(treeNode x)
\r
320 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
324 return child_rank(Par, x);
\r
327 // Depth(x): depth of node x, a simple binary rank on the parentheses sequence.
\r
328 int XMLTree::Depth(treeNode x)
\r
331 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
335 return depth(Par, x);
\r
338 // Preorder(x): returns the preorder number of node x, just counting the tree
\r
339 // nodes (i.e., tags, it disregards the texts in the tree).
\r
340 int XMLTree::Preorder(treeNode x)
\r
343 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
347 return preorder_rank(Par, x);
\r
350 // Postorder(x): returns the postorder number of node x, just counting the tree
\r
351 // nodes (i.e., tags, it disregards the texts in the tree).
\r
352 int XMLTree::Postorder(treeNode x)
\r
355 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
358 return postorder_rank(Par, x);
\r
361 // Tag(x): returns the tag identifier of node x.
\r
362 TagType XMLTree::Tag(treeNode x)
\r
365 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
369 return Tags->access(node2tagpos(x));
\r
372 // DocIds(x): returns the range of text identifiers that descend from node x.
\r
373 // returns {NULLT, NULLT} when there are no texts descending from x.
\r
374 range XMLTree::DocIds(treeNode x)
\r
377 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
382 if (indexing_empty_texts) { // faster, no rank needed
\r
384 r.max = x+2*subtree_size(Par, x)-2;
\r
386 else { // we are not indexing empty texts, we need rank
\r
387 int min = EBVector->rank1(x-1);
\r
388 int max = EBVector->rank1(x+2*subtree_size(Par, x)-2);
\r
389 if (min==max) { // range is empty, no texts within the subtree of x
\r
393 else { // the range is non-empty, there are texts within the subtree of x
\r
401 // Parent(x): returns the parent node of node x.
\r
402 treeNode XMLTree::Parent(treeNode x)
\r
405 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
411 return parent(Par, x);
\r
414 // Child(x,i): returns the i-th child of node x, assuming it exists.
\r
415 treeNode XMLTree::Child(treeNode x, int i)
\r
418 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
422 if (i <= OPTD) return naive_child(Par, x, i);
\r
423 else return child(Par, x, i);
\r
426 // FirstChild(x): returns the first child of node x, assuming it exists. Very fast in BP.
\r
427 treeNode XMLTree::FirstChild(treeNode x)
\r
430 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
434 return first_child(Par, x);
\r
437 // NextSibling(x): returns the next sibling of node x, assuming it exists.
\r
438 treeNode XMLTree::NextSibling(treeNode x)
\r
441 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
447 return next_sibling(Par, x);
\r
450 // PrevSibling(x): returns the previous sibling of node x, assuming it exists.
\r
451 treeNode XMLTree::PrevSibling(treeNode x)
\r
454 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
458 return prev_sibling(Par, x);
\r
461 // TaggedChild(x,i,tag): returns the i-th child of node x tagged tag, or NULLT if there is none.
\r
462 // Because of the balanced-parentheses representation of the tree, this operation is not supported
\r
463 // efficiently, just iterating among the children of node x until finding the desired child.
\r
464 treeNode XMLTree::TaggedChild(treeNode x, int i, TagType tag)
\r
467 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
473 child = first_child(Par, x); // starts at first child of node x
\r
474 if (child==(treeNode)-1) return NULLT; // node x is a leaf, there is no such child
\r
475 while (child!=(treeNode)-1) {
\r
476 if (Tags->access(node2tagpos(child)) == tag) { // current child is labeled with tag of interest
\r
478 if (i==0) return child; // we have seen i children of x tagged tag, this is the one we are looking for
\r
480 child = next_sibling(Par, x); // OK, let's try with the next child
\r
482 return NULLT; // no such child was found
\r
485 // TaggedDesc(x,tag): returns the first node tagged tag with larger preorder than x and within
\r
486 // the subtree of x. Returns NULLT if there is none.
\r
487 treeNode XMLTree::TaggedDesc(treeNode x, TagType tag)
\r
490 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
496 r = (int) Tags->rank(tag, node2tagpos(x));
\r
497 s = (int) Tags->select(tag, r+1);
\r
498 if (s == -1) return NULLT; // there is no such node
\r
499 y = tagpos2node(s); // transforms the tag position into a node position
\r
500 if (!is_ancestor(Par, x, y)) return NULLT; // the next node tagged tag (in preorder) is not within the subtree of x.
\r
504 // TaggedPrec(x,tag): returns the first node tagged tag with smaller preorder than x and not an
\r
505 // ancestor of x. Returns NULLT if there is none.
\r
506 treeNode XMLTree::TaggedPrec(treeNode x, TagType tag)
\r
509 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
514 treeNode node_s, root;
\r
515 r = (int)Tags->rank(tag, node2tagpos(x)-1);
\r
516 if (r==0) return NULLT; // there is no such node.
\r
517 s = (int)Tags->select(tag, r);
\r
518 root = root_node(Par);
\r
519 node_s = tagpos2node(s);
\r
520 while (is_ancestor(Par, node_s, x) && (node_s!=root)) { // the one that we found is an ancestor of x
\r
522 if (r==0) return NULLT; // there is no such node
\r
523 s = (int)Tags->select(tag, r); // we should use select_prev instead when provided
\r
524 node_s = tagpos2node(s);
\r
526 return NULLT; // there is no such node
\r
529 // TaggedFoll(x,tag): returns the first node tagged tag with larger preorder than x and not in
\r
530 // the subtree of x. Returns NULLT if there is none.
\r
531 treeNode XMLTree::TaggedFoll(treeNode x, TagType tag)
\r
534 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
539 r = (int) Tags->rank(tag, node2tagpos(next_sibling(Par, x))-1);
\r
540 s = (int) Tags->select(tag, r+1); // select returns -1 in case that there is no r+1-th tag.
\r
541 if (s==-1) return NULLT;
\r
542 else return tagpos2node(s);
\r
545 // PrevText(x): returns the document identifier of the text to the left
\r
546 // of node x, or NULLT if x is the root node or the text is empty.
\r
547 // Assumes Doc ids start from 0.
\r
548 DocID XMLTree::PrevText(treeNode x)
\r
551 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
555 if (x == Root()) return NULLT;
\r
556 if (indexing_empty_texts) // faster, no rank needed
\r
558 else { // we are not indexing empty texts, rank is needed
\r
559 if (EBVector->access(x-1) == 0)
\r
560 return (DocID)NULLT; // there is no text to the left of node (text is empty)
\r
562 return (DocID)EBVector->rank1(x-1)-1; //-1 because document ids start from 0
\r
566 // NextText(x): returns the document identifier of the text to the right
\r
567 // of node x, or NULLT if x is the root node. Assumes Doc ids start from 0.
\r
568 DocID XMLTree::NextText(treeNode x)
\r
571 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
575 if (x == Root()) return NULLT;
\r
576 if (indexing_empty_texts) // faster, no rank needed
\r
577 return (DocID)x+2*subtree_size(Par, x)-1;
\r
578 else { // we are not indexing empty texts, rank is needed
\r
579 int p = x+2*subtree_size(Par, x)-1;
\r
580 if (EBVector->access(p) == 0) // there is no text to the right of node
\r
581 return (DocID)NULLT;
\r
583 return (DocID)EBVector->rank1(p)-1; //-1 because document ids start from 0
\r
587 // MyText(x): returns the document identifier of the text below node x,
\r
588 // or NULLT if x is not a leaf node or the text is empty. Assumes Doc
\r
589 // ids start from 0.
\r
590 DocID XMLTree::MyText(treeNode x)
\r
593 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
597 if (!IsLeaf(x)) return NULLT;
\r
598 if (indexing_empty_texts) // faster, no rank needed
\r
600 else { // we are not indexing empty texts, rank is needed
\r
601 if (EBVector->access(x) == 0) // there is no text below node x
\r
602 return (DocID)NULLT;
\r
604 return (DocID)EBVector->rank1(x)-1; //-1 because document ids start from 0
\r
608 // TextXMLId(d): returns the preorder of document with identifier d in the tree consisting of
\r
609 // all tree nodes and all text nodes. Assumes that the tree root has preorder 1.
\r
610 int XMLTree::TextXMLId(DocID d)
\r
613 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
617 if (indexing_empty_texts)
\r
618 return d + rank_open(Par, d)+1; // +1 because root has preorder 1
\r
619 else { // slower, needs rank and select
\r
620 int s = EBVector->select1(d+1);
\r
621 return rank_open(Par, s) + d + 1; // +1 because root has preorder 1
\r
625 // NodeXMLId(x): returns the preorder of node x in the tree consisting
\r
626 // of all tree nodes and all text nodes. Assumes that the tree root has
\r
628 int XMLTree::NodeXMLId(treeNode x)
\r
631 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
635 if (indexing_empty_texts)
\r
636 return x - 1 + rank_open(Par, x);
\r
638 if (x == Root()) return 1; // root node has preorder 1
\r
640 return rank_open(Par, x) + EBVector->rank1(x-1);
\r
644 // ParentNode(d): returns the parent node of document identifier d.
\r
645 treeNode XMLTree::ParentNode(DocID d)
\r
648 fprintf(stderr, "Error: data structure has not been constructed properly\n");
\r
656 // OJO : Kim : I added the d+1. before that, else branch was
\r
657 // EBVector->select1(d)
\r
658 // and gave wrong results (I'm really poking a bear with a stick here).
\r
659 if (indexing_empty_texts) s = d;
\r
660 else s = EBVector->select1(d+1);
\r
662 if (inspect(Par,s) == CP) // is a closing parenthesis
\r
663 return parent(Par, find_open(Par, s));
\r
664 else // is an opening parenthesis
\r
665 return (treeNode)s;
\r
670 // OpenDocument(empty_texts): it starts the construction of the data structure for
\r
671 // the XML document. Parameter empty_texts indicates whether we index empty texts
\r
672 // in document or not. Returns a non-zero value upon success, NULLT in case of error.
\r
673 int XMLTree::OpenDocument(bool empty_texts, int sample_rate_text,bool dtc)
\r
675 initialized = true;
\r
677 found_attributes = false;
\r
683 indexing_empty_texts = empty_texts;
\r
685 par_aux = (pb *)umalloc(sizeof(pb)*parArraySize);
\r
687 tags_aux = (TagType *) umalloc(sizeof(TagType));
\r
689 TagName = (unsigned char **) umalloc(2*sizeof(unsigned char*));
\r
691 TagName[0] = (unsigned char *) umalloc(4*sizeof(unsigned char));
\r
693 strcpy((char *) TagName[0], "<@>");
\r
695 TagName[1] = (unsigned char *) umalloc(4*sizeof(unsigned char));
\r
697 strcpy((char *) TagName[1], "<$>");
\r
700 if (!indexing_empty_texts)
\r
701 empty_texts_aux = (unsigned int *)umalloc(sizeof(unsigned int));
\r
705 Text = TextCollection::InitTextCollection((unsigned)sample_rate_text);
\r
707 return 1; // indicates success in the initialization of the data structure
\r
710 // CloseDocument(): it finishes the construction of the data structure for the XML
\r
711 // document. Tree and tags are represented in the final form, dynamic data
\r
712 // structures are made static, and the flag "finished" is set to true. After that,
\r
713 // the data structure can be queried.
\r
714 int XMLTree::CloseDocument()
\r
716 if (!initialized) { // data structure has not been initialized properly
\r
717 fprintf(stderr, "Error: data structure has not been initialized properly (by calling method OpenDocument)\n");
\r
721 // closing parenthesis for the tree root
\r
722 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*(1+npar/(8*sizeof(pb))));
\r
724 // creates the data structure for the tree topology
\r
725 Par = (bp *)umalloc(sizeof(bp));
\r
726 bp_construct(Par, npar, par_aux, OPT_DEGREE|0);
\r
727 // creates structure for tags
\r
728 static_bitsequence_builder * bmb = new static_bitsequence_builder_brw32(20);
\r
729 static_permutation_builder * pmb = new static_permutation_builder_mrrr(PERM_SAMPLE, bmb);
\r
730 static_sequence_builder * ssb = new static_sequence_builder_gmr_chunk(bmb, pmb);
\r
733 // If we found an attribute then "<@>" is present in the tree
\r
734 // if we didn't then it is not. "<$>" is never present in the tree
\r
735 int ntagsize = found_attributes ? 2*ntagnames-1 : 2*ntagnames - 2;
\r
737 Tags = new static_sequence_gmr((uint *) tags_aux, (uint) npar-1,ntagsize, bmb, ssb);
\r
742 // makes the text collection static
\r
744 Text->MakeStatic();
\r
746 // creates the data structure marking the non-empty texts (just in the case it is necessary)
\r
747 if (!indexing_empty_texts) {
\r
748 EBVector = new static_bitsequence_rrr02((uint *)empty_texts_aux,(ulong)npar,(uint)32);
\r
749 free (empty_texts_aux);
\r
750 empty_texts_aux = NULL;
\r
753 // OJO was leaked before, found by valgrind
\r
760 return 1; // indicates success in the inicialization
\r
764 // NewOpenTag(tagname): indicates the event of finding a new opening tag in the document.
\r
765 // Tag name is given. Returns a non-zero value upon success, and returns NULLT
\r
766 // in case of failing when trying to insert the new tag.
\r
767 int XMLTree::NewOpenTag(unsigned char *tagname)
\r
771 if (!initialized) { // data structure has not been initialized properly
\r
772 fprintf(stderr, "Error: you cannot insert a new opening tag without first calling method OpenDocument first\n");
\r
776 // inserts a new opening parentheses in the bit sequence
\r
777 if (sizeof(pb)*8*parArraySize == npar) { // no space left for the new parenthesis
\r
778 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*2*parArraySize);
\r
782 setbit(par_aux,npar,OP); // marks a new opening parenthesis
\r
784 // transforms the tagname into a tag identifier. If the tag is new, we insert
\r
785 // it in the table.
\r
786 for (i=0; i<ntagnames; i++)
\r
787 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
\r
790 // NewOpenTag("<@>") was called
\r
792 found_attributes=true;
\r
794 if (i==ntagnames) { // the tag is a new one, then we insert it
\r
795 TagName = (unsigned char **)urealloc(TagName, sizeof(char *)*(ntagnames+1));
\r
798 fprintf(stderr, "Error: not enough memory\n");
\r
803 TagName[i] = (unsigned char *)umalloc(sizeof(unsigned char)*(strlen((const char *)tagname)+1));
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804 strcpy((char *)TagName[i], (const char *)tagname);
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806 tags_aux = (TagType *) urealloc(tags_aux, sizeof(TagType)*(npar + 1));
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808 tags_aux[npar] = i; // inserts the new tag id within the preorder sequence of tags
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817 // NewClosingTag(tagname): indicates the event of finding a new closing tag in the document.
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818 // Tag name is given. Returns a non-zero value upon success, and returns NULLT
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819 // in case of failing when trying to insert the new tag.
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820 int XMLTree::NewClosingTag(unsigned char *tagname)
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824 if (!initialized) { // data structure has not been initialized properly
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825 fprintf(stderr, "Error: you cannot insert a new closing tag without first calling method OpenDocument first\n");
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829 // inserts a new closing parentheses in the bit sequence
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830 if (sizeof(pb)*8*parArraySize == npar) { // no space left for the new parenthesis
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831 par_aux = (pb *)urealloc(par_aux, sizeof(pb)*2*parArraySize);
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835 setbit(par_aux,npar,CP); // marks a new closing opening parenthesis
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837 // transforms the tagname into a tag identifier. If the tag is new, we insert
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838 // it in the table.
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839 for (i=0; i<ntagnames; i++)
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840 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
\r
842 if (i==ntagnames) { // the tag is a new one, then we insert it
\r
843 TagName = (unsigned char **)urealloc(TagName, sizeof(char *)*(ntagnames+1));
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847 TagName[i] = (unsigned char *)umalloc(sizeof(char)*(strlen((const char *)tagname)+2));
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848 TagName[i][0] = '/';
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849 strcpy((char *)&(TagName[i][1]), (const char *)tagname);
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852 tags_aux = (TagType *)urealloc(tags_aux, sizeof(TagType)*(npar + 1));
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854 tags_aux[npar] = i; // inserts the new tag id within the preorder sequence of tags
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858 return 1; // success
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863 // NewText(s): indicates the event of finding a new (non-empty) text s in the document.
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864 // The new text is inserted within the text collection. Returns a non-zero value upon
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865 // success, NULLT in case of error.
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866 int XMLTree::NewText(unsigned char *s)
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868 if (!initialized) { // data structure has not been initialized properly
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869 fprintf(stderr, "Error: you cannot insert a new text without first calling method OpenDocument first\n");
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874 XMLTree::NewEmptyText();
\r
878 if (!indexing_empty_texts) {
\r
879 empty_texts_aux = (unsigned int *)urealloc(empty_texts_aux, sizeof(pb)*(1+(npar-1)/(8*sizeof(pb))));
\r
880 bitset(empty_texts_aux, npar-1); // marks the non-empty text with a 1 in the bit vector
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883 Text->InsertText(s);
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885 return 1; // success
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888 // NewEmptyText(): indicates the event of finding a new empty text in the document.
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889 // In case of indexing empty and non-empty texts, we insert the empty texts into the
\r
890 // text collection. In case of indexing only non-empty texts, it just indicates an
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891 // empty text in the bit vector of empty texts. Returns a non-zero value upon
\r
892 // success, NULLT in case of error.
\r
893 int XMLTree::NewEmptyText()
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895 unsigned char c = 0;
\r
896 if (!initialized) { // data structure has not been initialized properly
\r
897 fprintf(stderr, "Error: you cannot insert a new empty text without first calling method OpenDocument first\n");
\r
901 if (!indexing_empty_texts) {
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902 empty_texts_aux = (unsigned int *)urealloc(empty_texts_aux, sizeof(pb)*(1+(npar-1)/(8*sizeof(pb))));
\r
904 bitclean(empty_texts_aux, npar-1); // marks the empty text with a 0 in the bit vector
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906 else Text->InsertText(&c); // we insert the empty text just in case we index all the texts
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908 return 1; // success
\r
912 // GetTagId: returns the tag identifier corresponding to a given tag name.
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913 // Returns NULLT in case that the tag name does not exists.
\r
914 TagType XMLTree::GetTagId(unsigned char *tagname)
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917 // this should be changed for more efficient processing
\r
918 for (i=0; i<ntagnames; i++)
\r
919 if (strcmp((const char *)tagname,(const char *)TagName[i])==0) break;
\r
920 if (i==ntagnames) return (TagType)NULLT; // tagname does not exists in the table
\r
925 // GetTagName(tagid): returns the tag name of a given tag identifier.
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926 // Returns NULL in case that the tag identifier is not valid.
\r
927 unsigned char *XMLTree::GetTagName(TagType tagid)
\r
931 if (tagid >= ntagnames) return NULL; // invalid tag identifier
\r
932 s = (unsigned char *)umalloc((strlen((const char *)TagName[tagid])+1)*sizeof(unsigned char));
\r
933 strcpy((char *)s, (const char *)TagName[tagid]);
\r
938 //KIM : OJO need the two following methods
\r
940 const unsigned char *XMLTree::GetTagNameByRef(TagType tagid)
\r
942 if (tagid >= ntagnames) return NULL; // invalid tag identifier
\r
943 return ((const unsigned char*) TagName[tagid]);
\r
948 TagType XMLTree::RegisterTag(unsigned char *tagname)
\r
953 TagType id = XMLTree::GetTagId(tagname);
\r
956 ntagnames = ntagnames + 1;
\r
957 TagName = (unsigned char **) urealloc(TagName,ntagnames*(sizeof(unsigned char*)));
\r
958 TagName[id] = (unsigned char *) umalloc(sizeof(unsigned char)*strlen( (const char*) tagname)+1);
\r
959 strcpy((char*)TagName[id], (const char *)tagname);
\r