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<title>LCOV - lcov.info - ept/textsearch/textsearch.cc</title>
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<body>
<table width="100%" border=0 cellspacing=0 cellpadding=0>
<tr><td class="title">LTP GCOV extension - code coverage report</td></tr>
<tr><td class="ruler"><img src="../../glass.png" width=3 height=3 alt=""></td></tr>
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<table cellpadding=1 border=0 width="100%">
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<td class="headerItem" width="20%">Current view:</td>
<td class="headerValue" width="80%" colspan=4><a href="../../index.html">directory</a> - <a href="index.html">ept/textsearch</a> - textsearch.cc</td>
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<tr>
<td class="headerItem" width="20%">Test:</td>
<td class="headerValue" width="80%" colspan=4>lcov.info</td>
</tr>
<tr>
<td class="headerItem" width="20%">Date:</td>
<td class="headerValue" width="20%">2008-08-14</td>
<td width="20%"></td>
<td class="headerItem" width="20%">Instrumented lines:</td>
<td class="headerValue" width="20%">115</td>
</tr>
<tr>
<td class="headerItem" width="20%">Code covered:</td>
<td class="headerValue" width="20%">72.2 %</td>
<td width="20%"></td>
<td class="headerItem" width="20%">Executed lines:</td>
<td class="headerValue" width="20%">83</td>
</tr>
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</tr>
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<tr>
<td><pre class="source">
<span class="lineNum"> 1 </span> :
<span class="lineNum"> 2 </span> : /** @file
<span class="lineNum"> 3 </span> : * @author Enrico Zini <enrico@enricozini.org>
<span class="lineNum"> 4 </span> : * Fast full-text search
<span class="lineNum"> 5 </span> : */
<span class="lineNum"> 6 </span> :
<span class="lineNum"> 7 </span> : /*
<span class="lineNum"> 8 </span> : * Copyright (C) 2007 Enrico Zini <enrico@debian.org>
<span class="lineNum"> 9 </span> : *
<span class="lineNum"> 10 </span> : * This program is free software; you can redistribute it and/or modify
<span class="lineNum"> 11 </span> : * it under the terms of the GNU General Public License as published by
<span class="lineNum"> 12 </span> : * the Free Software Foundation; either version 2 of the License, or
<span class="lineNum"> 13 </span> : * (at your option) any later version.
<span class="lineNum"> 14 </span> : *
<span class="lineNum"> 15 </span> : * This program is distributed in the hope that it will be useful,
<span class="lineNum"> 16 </span> : * but WITHOUT ANY WARRANTY; without even the implied warranty of
<span class="lineNum"> 17 </span> : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<span class="lineNum"> 18 </span> : * GNU General Public License for more details.
<span class="lineNum"> 19 </span> : *
<span class="lineNum"> 20 </span> : * You should have received a copy of the GNU General Public License
<span class="lineNum"> 21 </span> : * along with this program; if not, write to the Free Software
<span class="lineNum"> 22 </span> : * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<span class="lineNum"> 23 </span> : */
<span class="lineNum"> 24 </span> :
<span class="lineNum"> 25 </span> : #include <ept/textsearch/textsearch.h>
<span class="lineNum"> 26 </span> : #include <ept/textsearch/maint/path.h>
<span class="lineNum"> 27 </span> : #include <ept/apt/apt.h>
<span class="lineNum"> 28 </span> : #include <ept/apt/packagerecord.h>
<span class="lineNum"> 29 </span> : //#include <ept/debtags/debtags.h>
<span class="lineNum"> 30 </span> :
<span class="lineNum"> 31 </span> : #include <wibble/regexp.h>
<span class="lineNum"> 32 </span> : #include <cctype>
<span class="lineNum"> 33 </span> : #include <cmath>
<span class="lineNum"> 34 </span> :
<span class="lineNum"> 35 </span> : #include <xapian/queryparser.h>
<span class="lineNum"> 36 </span> :
<span class="lineNum"> 37 </span> : #include <algorithm>
<span class="lineNum"> 38 </span> :
<span class="lineNum"> 39 </span> : #include <iostream>
<span class="lineNum"> 40 </span> :
<span class="lineNum"> 41 </span> : using namespace std;
<span class="lineNum"> 42 </span> : using namespace ept::apt;
<span class="lineNum"> 43 </span> : using namespace ept::debtags;
<span class="lineNum"> 44 </span> :
<span class="lineNum"> 45 </span> : namespace ept {
<span class="lineNum"> 46 </span> : namespace textsearch {
<span class="lineNum"> 47 </span> :
<span class="lineNum"> 48 </span> : size_t max_index = 0;
<span class="lineNum"> 49 </span> :
<span class="lineNum"> 50 </span><span class="lineCov"> 11 : TextSearch::TextSearch()</span>
<span class="lineNum"> 51 </span><span class="lineCov"> 11 : : m_timestamp(0), m_stem("en")</span>
<span class="lineNum"> 52 </span> : {
<span class="lineNum"> 53 </span><span class="lineCov"> 22 : m_timestamp = Path::indexTimestamp();</span>
<span class="lineNum"> 54 </span><span class="lineCov"> 11 : if (m_timestamp)</span>
<span class="lineNum"> 55 </span><span class="lineCov"> 9 : m_db.add_database(Xapian::Database(Path::index()));</span>
<span class="lineNum"> 56 </span><span class="lineCov"> 11 : }</span>
<span class="lineNum"> 57 </span> :
<span class="lineNum"> 58 </span><span class="lineCov"> 7 : std::string TextSearch::toLower(const std::string& str)</span>
<span class="lineNum"> 59 </span> : {
<span class="lineNum"> 60 </span><span class="lineCov"> 7 : std::string res;</span>
<span class="lineNum"> 61 </span><span class="lineCov"> 7 : res.reserve(str.size());</span>
<span class="lineNum"> 62 </span><span class="lineCov"> 44 : for (std::string::const_iterator i = str.begin(); i != str.end(); ++i)</span>
<span class="lineNum"> 63 </span><span class="lineCov"> 37 : res += tolower(*i);</span>
<span class="lineNum"> 64 </span><span class="lineNoCov"> 0 : return res;</span>
<span class="lineNum"> 65 </span> : }
<span class="lineNum"> 66 </span> :
<span class="lineNum"> 67 </span><span class="lineCov"> 3 : bool TextSearch::needsRebuild(apt::Apt& apt)</span>
<span class="lineNum"> 68 </span> : {
<span class="lineNum"> 69 </span><span class="lineCov"> 3 : return apt.timestamp() > m_timestamp;</span>
<span class="lineNum"> 70 </span> : }
<span class="lineNum"> 71 </span> :
<span class="lineNum"> 72 </span><span class="lineNoCov"> 0 : void TextSearch::normalize_and_add(Xapian::Document& doc, const std::string& term, int& pos) const</span>
<span class="lineNum"> 73 </span> : {
<span class="lineNum"> 74 </span><span class="lineNoCov"> 0 : string t = TextSearch::toLower(term);</span>
<span class="lineNum"> 75 </span><span class="lineNoCov"> 0 : string s = m_stem(t);</span>
<span class="lineNum"> 76 </span><span class="lineNoCov"> 0 : doc.add_term(t);</span>
<span class="lineNum"> 77 </span><span class="lineNoCov"> 0 : if (s != t)</span>
<span class="lineNum"> 78 </span><span class="lineNoCov"> 0 : doc.add_term(s);</span>
<span class="lineNum"> 79 </span><span class="lineNoCov"> 0 : }</span>
<span class="lineNum"> 80 </span> :
<span class="lineNum"> 81 </span><span class="lineCov"> 10 : bool TextSearch::rebuildIfNeeded(apt::Apt& apt, const std::vector<const TextSearch::ExtraIndexer*>& extraIndexers)</span>
<span class="lineNum"> 82 </span> : {
<span class="lineNum"> 83 </span> : // Check if a rebuild is needed, and keep a copy of the APT timestamp for
<span class="lineNum"> 84 </span> : // saving later
<span class="lineNum"> 85 </span><span class="lineCov"> 10 : time_t aptts = apt.timestamp();</span>
<span class="lineNum"> 86 </span><span class="lineCov"> 10 : if (aptts <= m_timestamp)</span>
<span class="lineNum"> 87 </span><span class="lineCov"> 4 : return false;</span>
<span class="lineNum"> 88 </span> :
<span class="lineNum"> 89 </span> : // Reindex
<span class="lineNum"> 90 </span><span class="lineCov"> 6 : Xapian::WritableDatabase database(Xapian::Flint::open(Path::index(), Xapian::DB_CREATE_OR_OPEN));</span>
<span class="lineNum"> 91 </span><span class="lineCov"> 6 : Xapian::TermGenerator termgen;</span>
<span class="lineNum"> 92 </span><span class="lineCov"> 6 : termgen.set_stemmer(m_stem);</span>
<span class="lineNum"> 93 </span> : //database.begin_transaction();
<span class="lineNum"> 94 </span><span class="lineCov"> 6 : PackageRecord rec;</span>
<span class="lineNum"> 95 </span><span class="lineCov"> 6 : size_t count = 0;</span>
<span class="lineNum"> 96 </span><span class="lineCov"> 2610 : for (Apt::record_iterator i = apt.recordBegin();</span>
<span class="lineNum"> 97 </span> : i != apt.recordEnd(); ++i, ++count)
<span class="lineNum"> 98 </span> : {
<span class="lineNum"> 99 </span> : // If we are testing, we can set a limit to how many packages we index,
<span class="lineNum"> 100 </span> : // to avoid it taking too much time
<span class="lineNum"> 101 </span><span class="lineCov"> 2604 : if (max_index != 0 && count > max_index)</span>
<span class="lineNum"> 102 </span><span class="lineNoCov"> 0 : break;</span>
<span class="lineNum"> 103 </span> :
<span class="lineNum"> 104 </span><span class="lineCov"> 2604 : rec.scan(*i);</span>
<span class="lineNum"> 105 </span> :
<span class="lineNum"> 106 </span><span class="lineCov"> 2604 : Xapian::Document doc;</span>
<span class="lineNum"> 107 </span><span class="lineCov"> 2604 : doc.set_data(rec.package());</span>
<span class="lineNum"> 108 </span> :
<span class="lineNum"> 109 </span><span class="lineCov"> 2604 : string pkgid = "XP" + rec.package();</span>
<span class="lineNum"> 110 </span> : //std::cerr << "Add " << pkgid << ": " << idx << std::endl;
<span class="lineNum"> 111 </span><span class="lineCov"> 2604 : doc.add_term(pkgid);</span>
<span class="lineNum"> 112 </span> :
<span class="lineNum"> 113 </span> : // Index tags as well
<span class="lineNum"> 114 </span><span class="lineCov"> 2604 : set<string> tags = rec.tag();</span>
<span class="lineNum"> 115 </span><span class="lineCov"> 2604 : for (set<string>::const_iterator ti = tags.begin();</span>
<span class="lineNum"> 116 </span> : ti != tags.end(); ++ti)
<span class="lineNum"> 117 </span><span class="lineNoCov"> 0 : doc.add_term("XT"+*ti);</span>
<span class="lineNum"> 118 </span> :
<span class="lineNum"> 119 </span><span class="lineCov"> 2604 : termgen.set_document(doc);</span>
<span class="lineNum"> 120 </span><span class="lineCov"> 2604 : termgen.index_text_without_positions(rec.package());</span>
<span class="lineNum"> 121 </span><span class="lineCov"> 5208 : termgen.index_text_without_positions(rec.description());</span>
<span class="lineNum"> 122 </span> :
<span class="lineNum"> 123 </span> : // Add the values
<span class="lineNum"> 124 </span><span class="lineCov"> 5208 : doc.add_value(VAL_APT_INSTALLED_SIZE, Xapian::sortable_serialise(rec.installedSize()));</span>
<span class="lineNum"> 125 </span><span class="lineCov"> 2604 : doc.add_value(VAL_APT_PACKAGE_SIZE, Xapian::sortable_serialise(rec.packageSize()));</span>
<span class="lineNum"> 126 </span> :
<span class="lineNum"> 127 </span><span class="lineCov"> 2604 : if (m_timestamp)</span>
<span class="lineNum"> 128 </span><span class="lineCov"> 2170 : database.replace_document(pkgid, doc);</span>
<span class="lineNum"> 129 </span> : else
<span class="lineNum"> 130 </span><span class="lineCov"> 434 : database.add_document(doc);</span>
<span class="lineNum"> 131 </span><span class="lineCov"> 6 : }</span>
<span class="lineNum"> 132 </span> :
<span class="lineNum"> 133 </span> : //database.commit_transaction();
<span class="lineNum"> 134 </span> :
<span class="lineNum"> 135 </span><span class="lineCov"> 6 : if (!m_timestamp)</span>
<span class="lineNum"> 136 </span><span class="lineCov"> 1 : m_db.add_database(Xapian::Database(Path::index()));</span>
<span class="lineNum"> 137 </span> : else
<span class="lineNum"> 138 </span><span class="lineCov"> 5 : m_db.reopen();</span>
<span class="lineNum"> 139 </span> :
<span class="lineNum"> 140 </span><span class="lineCov"> 6 : m_timestamp = aptts;</span>
<span class="lineNum"> 141 </span> :
<span class="lineNum"> 142 </span><span class="lineCov"> 6 : Path::setTimestamp(aptts);</span>
<span class="lineNum"> 143 </span> :
<span class="lineNum"> 144 </span><span class="lineCov"> 6 : return true;</span>
<span class="lineNum"> 145 </span> : }
<span class="lineNum"> 146 </span> :
<span class="lineNum"> 147 </span><span class="lineCov"> 2 : Xapian::Query TextSearch::makeORQuery(const std::string& keywords) const</span>
<span class="lineNum"> 148 </span> : {
<span class="lineNum"> 149 </span><span class="lineCov"> 2 : wibble::Tokenizer tok(keywords, "[A-Za-z0-9_-]+", REG_EXTENDED);</span>
<span class="lineNum"> 150 </span><span class="lineCov"> 4 : return makeORQuery(tok.begin(), tok.end());</span>
<span class="lineNum"> 151 </span> : }
<span class="lineNum"> 152 </span> :
<span class="lineNum"> 153 </span><span class="lineCov"> 1 : Xapian::Query TextSearch::makePartialORQuery(const std::string& keywords) const</span>
<span class="lineNum"> 154 </span> : {
<span class="lineNum"> 155 </span><span class="lineCov"> 1 : wibble::Tokenizer tok(keywords, "[A-Za-z0-9_-]+", REG_EXTENDED);</span>
<span class="lineNum"> 156 </span><span class="lineCov"> 1 : vector<string> tokens;</span>
<span class="lineNum"> 157 </span> : // FIXME: make the Tokenizer iterators properly iterable
<span class="lineNum"> 158 </span><span class="lineCov"> 2 : for (wibble::Tokenizer::const_iterator i = tok.begin();</span>
<span class="lineNum"> 159 </span> : i != tok.end(); ++i)
<span class="lineNum"> 160 </span><span class="lineCov"> 1 : tokens.push_back(*i);</span>
<span class="lineNum"> 161 </span> : // Add all the terms starting with 'last'
<span class="lineNum"> 162 </span><span class="lineCov"> 1 : if (!tokens.empty())</span>
<span class="lineNum"> 163 </span> : {
<span class="lineNum"> 164 </span><span class="lineCov"> 1 : string& last = *tokens.rbegin();</span>
<span class="lineNum"> 165 </span><span class="lineCov"> 1 : if (last.size() == 1)</span>
<span class="lineNum"> 166 </span> : // Ignore one-letter partial terms: they make the query uselessly
<span class="lineNum"> 167 </span> : // large and slow, and it's worth just to wait for more characters
<span class="lineNum"> 168 </span> : // to come
<span class="lineNum"> 169 </span><span class="lineNoCov"> 0 : tokens.resize(tokens.size() - 1);</span>
<span class="lineNum"> 170 </span> : else
<span class="lineNum"> 171 </span><span class="lineCov"> 1 : copy(m_db.allterms_begin(last), m_db.allterms_end(last), back_inserter(tokens));</span>
<span class="lineNum"> 172 </span> : /*
<span class="lineNum"> 173 </span> : for (Xapian::TermIterator t = m_db.allterms_begin(last);
<span class="lineNum"> 174 </span> : t != m_db.allterms_end(last); ++t)
<span class="lineNum"> 175 </span> : tokens.push_back(*t);
<span class="lineNum"> 176 </span> : */
<span class="lineNum"> 177 </span> : }
<span class="lineNum"> 178 </span><span class="lineCov"> 1 : return makeORQuery(tokens.begin(), tokens.end());</span>
<span class="lineNum"> 179 </span> : }
<span class="lineNum"> 180 </span> :
<span class="lineNum"> 181 </span><span class="lineCov"> 10 : Xapian::docid TextSearch::docidByName(const std::string& pkgname) const</span>
<span class="lineNum"> 182 </span> : {
<span class="lineNum"> 183 </span><span class="lineCov"> 10 : Xapian::PostingIterator i = m_db.postlist_begin("XP"+pkgname);</span>
<span class="lineNum"> 184 </span><span class="lineCov"> 10 : if (i == m_db.postlist_end("XP"+pkgname))</span>
<span class="lineNum"> 185 </span><span class="lineCov"> 5 : return 0;</span>
<span class="lineNum"> 186 </span> : else
<span class="lineNum"> 187 </span><span class="lineCov"> 5 : return *i;</span>
<span class="lineNum"> 188 </span> : }
<span class="lineNum"> 189 </span> :
<span class="lineNum"> 190 </span> : struct TagFilter : public Xapian::ExpandDecider
<span class="lineNum"> 191 </span><span class="lineCov"> 4 : {</span>
<span class="lineNum"> 192 </span><span class="lineNoCov"> 0 : virtual bool operator()(const std::string &term) const { return term[0] == 'T'; }</span>
<span class="lineNum"> 193 </span> : };
<span class="lineNum"> 194 </span> :
<span class="lineNum"> 195 </span><span class="lineCov"> 2 : static TagFilter tagFilter;</span>
<span class="lineNum"> 196 </span> :
<span class="lineNum"> 197 </span><span class="lineNoCov"> 0 : vector<string> TextSearch::expand(Xapian::Enquire& enq) const</span>
<span class="lineNum"> 198 </span> : {
<span class="lineNum"> 199 </span><span class="lineNoCov"> 0 : Xapian::RSet rset;</span>
<span class="lineNum"> 200 </span> : // Get the top 5 results as 'good ones' to compute the search expansion
<span class="lineNum"> 201 </span><span class="lineNoCov"> 0 : Xapian::MSet mset = enq.get_mset(0, 5);</span>
<span class="lineNum"> 202 </span><span class="lineNoCov"> 0 : for (Xapian::MSet::iterator i = mset.begin(); i != mset.end(); ++i)</span>
<span class="lineNum"> 203 </span><span class="lineNoCov"> 0 : rset.add_document(i);</span>
<span class="lineNum"> 204 </span> : // Get the expanded set, only expanding the query with tag names
<span class="lineNum"> 205 </span><span class="lineNoCov"> 0 : Xapian::ESet eset = enq.get_eset(5, rset, &tagFilter);</span>
<span class="lineNum"> 206 </span><span class="lineNoCov"> 0 : vector<string> res;</span>
<span class="lineNum"> 207 </span><span class="lineNoCov"> 0 : for (Xapian::ESetIterator i = eset.begin(); i != eset.end(); ++i)</span>
<span class="lineNum"> 208 </span><span class="lineNoCov"> 0 : res.push_back(*i);</span>
<span class="lineNum"> 209 </span><span class="lineNoCov"> 0 : return res;</span>
<span class="lineNum"> 210 </span> : }
<span class="lineNum"> 211 </span> :
<span class="lineNum"> 212 </span><span class="lineNoCov"> 0 : Xapian::Query TextSearch::makeRelatedQuery(const std::string& pkgname) const</span>
<span class="lineNum"> 213 </span> : {
<span class="lineNum"> 214 </span><span class="lineNoCov"> 0 : Xapian::Enquire enquire(db());</span>
<span class="lineNum"> 215 </span> :
<span class="lineNum"> 216 </span> : // Retrieve the document for the given package
<span class="lineNum"> 217 </span><span class="lineNoCov"> 0 : enquire.set_query(Xapian::Query("XP"+pkgname));</span>
<span class="lineNum"> 218 </span><span class="lineNoCov"> 0 : Xapian::MSet matches = enquire.get_mset(0, 1);</span>
<span class="lineNum"> 219 </span><span class="lineNoCov"> 0 : Xapian::MSetIterator mi = matches.begin();</span>
<span class="lineNum"> 220 </span><span class="lineNoCov"> 0 : if (mi == matches.end()) return Xapian::Query();</span>
<span class="lineNum"> 221 </span><span class="lineNoCov"> 0 : Xapian::Document doc = mi.get_document();</span>
<span class="lineNum"> 222 </span> :
<span class="lineNum"> 223 </span> : // Return the query to get the list of similar documents
<span class="lineNum"> 224 </span><span class="lineNoCov"> 0 : return Xapian::Query(Xapian::Query::OP_OR, doc.termlist_begin(), doc.termlist_end());</span>
<span class="lineNum"> 225 </span> : }
<span class="lineNum"> 226 </span> :
<span class="lineNum"> 227 </span><span class="lineCov"> 4 : double TextSearch::getDoubleValue(const std::string& pkgname, Xapian::valueno val_id) const</span>
<span class="lineNum"> 228 </span> : {
<span class="lineNum"> 229 </span><span class="lineCov"> 4 : Xapian::docid id = docidByName(pkgname);</span>
<span class="lineNum"> 230 </span><span class="lineCov"> 4 : if (id == 0)</span>
<span class="lineNum"> 231 </span><span class="lineCov"> 2 : return 0.0;</span>
<span class="lineNum"> 232 </span><span class="lineCov"> 2 : Xapian::Document doc = db().get_document(id);</span>
<span class="lineNum"> 233 </span><span class="lineCov"> 2 : string val = doc.get_value(val_id);</span>
<span class="lineNum"> 234 </span><span class="lineCov"> 2 : if (val.empty())</span>
<span class="lineNum"> 235 </span><span class="lineNoCov"> 0 : return 0.0;</span>
<span class="lineNum"> 236 </span> : else
<span class="lineNum"> 237 </span><span class="lineCov"> 2 : return Xapian::sortable_unserialise(val);</span>
<span class="lineNum"> 238 </span> : }
<span class="lineNum"> 239 </span> :
<span class="lineNum"> 240 </span><span class="lineCov"> 4 : int TextSearch::getIntValue(const std::string& pkgname, Xapian::valueno val_id) const</span>
<span class="lineNum"> 241 </span> : {
<span class="lineNum"> 242 </span><span class="lineCov"> 4 : Xapian::docid id = docidByName(pkgname);</span>
<span class="lineNum"> 243 </span><span class="lineCov"> 4 : if (id == 0)</span>
<span class="lineNum"> 244 </span><span class="lineCov"> 2 : return 0;</span>
<span class="lineNum"> 245 </span><span class="lineCov"> 2 : Xapian::Document doc = db().get_document(id);</span>
<span class="lineNum"> 246 </span><span class="lineCov"> 2 : string val = doc.get_value(val_id);</span>
<span class="lineNum"> 247 </span><span class="lineCov"> 2 : if (val.empty())</span>
<span class="lineNum"> 248 </span><span class="lineNoCov"> 0 : return 0;</span>
<span class="lineNum"> 249 </span> : else
<span class="lineNum"> 250 </span><span class="lineCov"> 2 : return (int)nearbyint(Xapian::sortable_unserialise(val));</span>
<span class="lineNum"> 251 </span> : }
<span class="lineNum"> 252 </span> :
<span class="lineNum"> 253 </span> : }
<span class="lineNum"> 254 </span><span class="lineCov"> 6 : }</span>
<span class="lineNum"> 255 </span> :
<span class="lineNum"> 256 </span> : // vim:set ts=4 sw=4:
</pre>
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