lib: Add regexp searching for mid: prefix

[notmuch] / lib / regexp-fields.cc

diff --git a/lib/regexp-fields.cc b/lib/regexp-fields.cc
index b41747502e1e6b8bbea31044e583e10b75a155a3..7ae55e70016c1f5e26c8b3c47dc1a5a5624e5b2d 100644 (file)
--- a/lib/regexp-fields.cc
+++ b/lib/regexp-fields.cc
@@ -62,11 +62,6 @@ RegexpPostingSource::init (const Xapian::Database &db)
     it_ = db_.valuestream_begin (slot_);
     end_ = db.valuestream_end (slot_);
     started_ = false;
-
-    /* make sure we start on a matching value */
-    while (!at_end() && regexec (&regexp_, (*it_).c_str (), 0, NULL, 0) != 0) {
-       ++it_;
-    }
 }
 
 Xapian::doccount
@@ -113,25 +108,59 @@ RegexpPostingSource::next (unused (double min_wt))
     }
 }
 
+void
+RegexpPostingSource::skip_to (Xapian::docid did, unused (double min_wt))
+{
+    started_ = true;
+    it_.skip_to (did);
+    for (; ! at_end (); ++it_) {
+       std::string value = *it_;
+       if (regexec (&regexp_, value.c_str (), 0, NULL, 0) == 0)
+           break;
+    }
+}
+
+bool
+RegexpPostingSource::check (Xapian::docid did, unused (double min_wt))
+{
+    started_ = true;
+    if (!it_.check (did) || at_end ())
+       return false;
+    return (regexec (&regexp_, (*it_).c_str (), 0, NULL, 0) == 0);
+}
+
 static inline Xapian::valueno _find_slot (std::string prefix)
 {
     if (prefix == "from")
        return NOTMUCH_VALUE_FROM;
     else if (prefix == "subject")
        return NOTMUCH_VALUE_SUBJECT;
+    else if (prefix == "mid")
+       return NOTMUCH_VALUE_MESSAGE_ID;
     else
        throw Xapian::QueryParserError ("unsupported regexp field '" + prefix + "'");
 }
 
-RegexpFieldProcessor::RegexpFieldProcessor (std::string prefix, Xapian::QueryParser &parser_, notmuch_database_t *notmuch_)
-       : slot (_find_slot (prefix)), term_prefix (_find_prefix (prefix.c_str ())),
-         parser (parser_), notmuch (notmuch_)
+RegexpFieldProcessor::RegexpFieldProcessor (std::string prefix,
+                                           notmuch_field_flag_t options_,
+                                           Xapian::QueryParser &parser_,
+                                           notmuch_database_t *notmuch_)
+       : slot (_find_slot (prefix)),
+         term_prefix (_find_prefix (prefix.c_str ())),
+         options (options_),
+         parser (parser_),
+         notmuch (notmuch_)
 {
 };
 
 Xapian::Query
 RegexpFieldProcessor::operator() (const std::string & str)
 {
+    if (str.size () == 0)
+       return Xapian::Query(Xapian::Query::OP_AND_NOT,
+                            Xapian::Query::MatchAll,
+                            Xapian::Query (Xapian::Query::OP_WILDCARD, term_prefix));
+
     if (str.at (0) == '/') {
        if (str.at (str.size () - 1) == '/'){
            RegexpPostingSource *postings = new RegexpPostingSource (slot, str.substr(1,str.size () - 2));
@@ -140,10 +169,22 @@ RegexpFieldProcessor::operator() (const std::string & str)
            throw Xapian::QueryParserError ("unmatched regex delimiter in '" + str + "'");
        }
     } else {
-       /* TODO replace this with a nicer API level triggering of
-        * phrase parsing, when possible */
-       std::string quoted='"' + str + '"';
-       return parser.parse_query (quoted, NOTMUCH_QUERY_PARSER_FLAGS, term_prefix);
+       if (options & NOTMUCH_FIELD_PROBABILISTIC) {
+           /* TODO replace this with a nicer API level triggering of
+            * phrase parsing, when possible */
+           std::string query_str;
+
+           if (str.find (' ') != std::string::npos)
+               query_str = '"' + str + '"';
+           else
+               query_str = str;
+
+           return parser.parse_query (query_str, NOTMUCH_QUERY_PARSER_FLAGS, term_prefix);
+       } else {
+           /* Boolean prefix */
+           std::string term = term_prefix + str;
+           return Xapian::Query (term);
+       }
     }
 }
 #endif