00001 00004 /* Copyright (C) 2007 Lemur Consulting Ltd 00005 * Copyright (C) 2007 Olly Betts 00006 * 00007 * This program is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU General Public License as 00009 * published by the Free Software Foundation; either version 2 of the 00010 * License, or (at your option) any later version. 00011 * 00012 * This program is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with this program; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 00020 * USA 00021 */ 00022 00023 #include <config.h> 00024 00025 #include "net_postlist.h" 00026 #include "serialise.h" 00027 #include "serialise-double.h" 00028 00029 using namespace std; 00030 00031 Xapian::doccount 00032 NetworkPostList::get_termfreq() const 00033 { 00034 return termfreq; 00035 } 00036 00037 Xapian::docid 00038 NetworkPostList::get_docid() const 00039 { 00040 return lastdocid; 00041 } 00042 00043 Xapian::doclength 00044 NetworkPostList::get_doclength() const 00045 { 00046 return lastdoclen; 00047 } 00048 00049 Xapian::termcount 00050 NetworkPostList::get_wdf() const 00051 { 00052 return lastwdf; 00053 } 00054 00055 PositionList * 00056 NetworkPostList::read_position_list() 00057 { 00058 lastposlist = db->open_position_list(lastdocid, term); 00059 return lastposlist.get(); 00060 } 00061 00062 PositionList * 00063 NetworkPostList::open_position_list() const 00064 { 00065 return db->open_position_list(lastdocid, term); 00066 } 00067 00068 PostList * 00069 NetworkPostList::next(Xapian::weight) 00070 { 00071 if (!started) { 00072 started = true; 00073 pos = postings.data(); 00074 pos_end = pos + postings.size(); 00075 lastdocid = 0; 00076 } 00077 00078 if (pos == pos_end) { 00079 pos = NULL; 00080 } else { 00081 lastdocid += decode_length(&pos, pos_end, false) + 1; 00082 lastwdf = decode_length(&pos, pos_end, false); 00083 lastdoclen = unserialise_double(&pos, pos_end); 00084 } 00085 00086 return NULL; 00087 } 00088 00089 PostList * 00090 NetworkPostList::skip_to(Xapian::docid did, Xapian::weight min_weight) 00091 { 00092 if (!started) 00093 next(min_weight); 00094 while (pos && lastdocid < did) 00095 next(min_weight); 00096 return NULL; 00097 } 00098 00099 bool 00100 NetworkPostList::at_end() const 00101 { 00102 return (pos == NULL && started); 00103 } 00104 00105 string 00106 NetworkPostList::get_description() const 00107 { 00108 return "NetworkPostList(" + term + ")"; 00109 }