this->bwtEndPos = i;
}
- // Build up arrays for text length and starting positions
- // FIXME Temp, remove
+ // Build up array for text starting positions
BlockArray* textStartPos = new BlockArray(numberOfTexts, Tools::CeilLog2(this->n));
(*textStartPos)[0] = 0;
- // Construct samples
- ulong sampleLength = (n%samplerate==0) ? n/samplerate : n/samplerate+1;
- unsigned ceilLog2n = Tools::CeilLog2(n);
- BlockArray* positions = new BlockArray(sampleLength, ceilLog2n);
- BlockArray* tmpSuffix = new BlockArray(sampleLength, ceilLog2n);
-
// Mapping from end-markers to doc ID's:
- BlockArray *endmarkerDocId = new BlockArray(numberOfTexts, Tools::CeilLog2(numberOfTexts));
+ uint *endmarkerDocId = new uint[numberOfTexts]; // FIXME Use BlockArray with static_sequence_wvtree_noptrs.
uint *sampledpositions = new uint[n/(sizeof(uint)*8)+1];
for (ulong i = 0; i < n / (sizeof(uint)*8) + 1; i++)
ulongmax--;
uint alphabetrank_i_tmp =0;
+ /**
+ * First pass: populate tables textStartPos and sampledpositions.
+ */
for (ulong i=n-1;i<ulongmax;i--) {
// i substitutes SA->GetPos(i)
x=(i==n-1)?0:i+1;
if (x % samplerate == 0 && posOfSuccEndmarker - x > samplerate) {
set_field(sampledpositions,1,p,1);
- (*positions)[sampleCount] = p;
- (*tmpSuffix)[sampleCount] = x; // FIXME remove
sampleCount ++;
}
// Record the order of end-markers in BWT:
ulong endmarkerRank = alphabetrank_i_tmp - 1;
- (*endmarkerDocId)[endmarkerRank] = textId;
+ endmarkerDocId[endmarkerRank] = (textId + 1) % numberOfTexts;
// Store text length and text start position:
if (textId < (DocId)numberOfTexts - 1)
sampled = new static_bitsequence_rrr02(sampledpositions, n, 16);
delete [] sampledpositions;
- sampleLength = sampled->rank1(n-1);
+ ulong sampleLength = sampled->rank1(n-1);
assert(sampleCount == sampleLength);
// Suffixes store an offset from the text start position
suffixes = new BlockArray(sampleLength, Tools::CeilLog2(maxTextLength));
suffixDocId = new BlockArray(sampleLength, Tools::CeilLog2(numberOfTexts));
- for(ulong i=0; i<sampleLength; i++) {
- assert((*positions)[i] < n);
- ulong j = sampled->rank1((*positions)[i]);
+ p=bwtEndPos;
+ textId = numberOfTexts;
+
+ /**
+ * Second pass: populate tables suffixes and suffixDocId.
+ */
+ for (ulong i=n-1;i<ulongmax;i--) {
+ x=(i==n-1)?0:i+1;
+
+ if (sampled->access(p)) {
+ ulong j = sampled->rank1(p)-1;
- if (j==0) j=sampleLength;
- TextPosition textPos = (*tmpSuffix)[i];
- (*suffixDocId)[j-1] = DocIdAtTextPos(textStartPos, textPos);
+ (*suffixDocId)[j] = DocIdAtTextPos(textStartPos, x);
- assert((unsigned)DocIdAtTextPos(textStartPos, textPos) < numberOfTexts);
- assert((*suffixDocId)[j-1] < numberOfTexts);
- // calculate offset from text start:
- (*suffixes)[j-1] = textPos - (*textStartPos)[(*suffixDocId)[j-1]];
+ // calculate offset from text start:
+ (*suffixes)[j] = x - (*textStartPos)[(*suffixDocId)[j]];
+ }
+
+ uchar c = alphabetrank->access(p, alphabetrank_i_tmp);
+ if (c == '\0')
+ {
+ --textId;
+ // LF-mapping from '\0' does not work with this (pseudo) BWT (see details from Wolfgang's thesis).
+ p = textId; // Correct LF-mapping to the last char of the previous text.
+ }
+ else // Now c != '\0', do LF-mapping:
+ p = C[c]+alphabetrank_i_tmp-1;
}
- // FIXME Temp, remove
- delete tmpSuffix;
- delete positions;
+ assert(textId == 0);
+
delete textStartPos;
#ifdef DEBUG_MEMUSAGE
HeapProfiler::ResetMaxHeapConsumption();
#endif
- uint *tmp = new uint[numberOfTexts]; // FIXME Silly...
- for (unsigned i = 0; i < numberOfTexts; ++i)
- {
- tmp[i] = ((*endmarkerDocId)[i] + 1) % numberOfTexts;
-// cout << tmp[i] << ",";
- }
-// cout << endl;
- delete endmarkerDocId;
-
alphabet_mapper * am = new alphabet_mapper_none();
static_bitsequence_builder * bmb = new static_bitsequence_builder_brw32(16); // FIXME samplerate?
- Doc = new static_sequence_wvtree_noptrs(tmp, numberOfTexts, bmb, am);
+ Doc = new static_sequence_wvtree_noptrs(endmarkerDocId, numberOfTexts, bmb, am, true);
delete bmb;
- // delete [] tmp; // already deleted!
+ // delete [] endmarkerDocId; // already deleted in static_sequence_wvtree_noptrs!
#ifdef DEBUG_MEMUSAGE
std::cerr << "max heap usage after Doc: " << HeapProfiler::GetMaxHeapConsumption()/(1024*1024) << " Mbytes" << std::endl;
#endif
-
- /*document_result res = Doc->access(3, 3, 0, 3);
- cout << "Access result: ";
- for (document_result::iterator it = res.begin(); it != res.end(); ++it)
- cout << *it << ", ";
- cout << endl;
- exit(0);*/
}