xapian-core/api/vectortermlist.cc

   1 /** @file
   2  * @brief A vector-like container of terms which can be iterated.
   3  */
   4 /* Copyright (C) 2011,2015,2024 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <config.h>
  22
  23 #include "vectortermlist.h"
  24
  25 #include "omassert.h"
  26 #include "pack.h"
  27 #include "xapian/error.h"
  28
  29 using namespace std;
  30
  31 Xapian::termcount
  32 VectorTermList::get_approx_size() const
  33 {
  34     return num_terms;
  35 }
  36
  37 Xapian::termcount
  38 VectorTermList::get_wdf() const
  39 {
  40     // Check we've started but not reached the end.
  41     Assert(p != data.data());
  42     Assert(p != NULL);
  43     return 1;
  44 }
  45
  46 Xapian::doccount
  47 VectorTermList::get_termfreq() const
  48 {
  49     throw Xapian::InvalidOperationError("VectorTermList::get_termfreq() not meaningful");
  50 }
  51
  52 TermList *
  53 VectorTermList::next()
  54 {
  55     // Check we've not reached the end.
  56     Assert(p != NULL);
  57
  58     const char * end = data.data() + data.size();
  59     if (p == end) {
  60         return this;
  61     }
  62     if (!unpack_string(&p, end, current_term)) {
  63         unpack_throw_serialisation_error(p);
  64     }
  65
  66     return NULL;
  67 }
  68
  69 TermList*
  70 VectorTermList::skip_to(string_view)
  71 {
  72     // skip_to only makes sense for termlists which are in sorted order.
  73     throw Xapian::InvalidOperationError("VectorTermList::skip_to() not meaningful");
  74 }
  75
  76 Xapian::termcount
  77 VectorTermList::positionlist_count() const
  78 {
  79     throw Xapian::InvalidOperationError("VectorTermList::positionlist_count() not meaningful");
  80 }
  81
  82 PositionList*
  83 VectorTermList::positionlist_begin() const
  84 {
  85     throw Xapian::InvalidOperationError("VectorTermList::positionlist_begin() not meaningful");
  86 }