mirror of
https://git.notmuchmail.org/git/notmuch
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89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/* regex-fields.h - xapian glue for semi-bruteforce regexp search
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*
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* This file is part of notmuch.
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*
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* Copyright © 2015 Austin Clements
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* Copyright © 2016 David Bremner
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see https://www.gnu.org/licenses/ .
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*
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* Author: Austin Clements <aclements@csail.mit.edu>
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* David Bremner <david@tethera.net>
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*/
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#ifndef NOTMUCH_REGEXP_FIELDS_H
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#define NOTMUCH_REGEXP_FIELDS_H
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#include <sys/types.h>
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#include <regex.h>
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#include "database-private.h"
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#include "notmuch-private.h"
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notmuch_status_t
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_notmuch_regex_to_query (notmuch_database_t *notmuch, Xapian::valueno slot, std::string field,
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std::string regexp_str,
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Xapian::Query &output, std::string &msg);
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/* A posting source that returns documents where a value matches a
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* regexp.
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*/
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class RegexpPostingSource : public Xapian::PostingSource
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{
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protected:
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const Xapian::valueno slot_;
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regex_t regexp_;
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Xapian::Database db_;
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bool started_;
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Xapian::ValueIterator it_, end_;
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/* No copying */
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RegexpPostingSource (const RegexpPostingSource &);
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RegexpPostingSource &operator= (const RegexpPostingSource &);
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public:
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RegexpPostingSource (Xapian::valueno slot, const std::string ®exp);
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~RegexpPostingSource ();
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void init (const Xapian::Database &db);
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Xapian::doccount get_termfreq_min () const;
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Xapian::doccount get_termfreq_est () const;
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Xapian::doccount get_termfreq_max () const;
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Xapian::docid get_docid () const;
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bool at_end () const;
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void next (unused (double min_wt));
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void skip_to (Xapian::docid did, unused (double min_wt));
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bool check (Xapian::docid did, unused (double min_wt));
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};
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class RegexpFieldProcessor : public Xapian::FieldProcessor {
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protected:
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Xapian::valueno slot;
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std::string field;
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std::string term_prefix;
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notmuch_field_flag_t options;
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Xapian::QueryParser &parser;
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notmuch_database_t *notmuch;
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public:
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RegexpFieldProcessor (std::string prefix, notmuch_field_flag_t options,
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Xapian::QueryParser &parser_, notmuch_database_t *notmuch_);
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~RegexpFieldProcessor ()
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{
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};
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Xapian::Query operator() (const std::string & str);
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};
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#endif /* NOTMUCH_REGEXP_FIELDS_H */
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