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/** @file
* @brief The non-lemon-generated parts of the QueryParser class.
*/
/* Copyright (C) 2005-2025 Olly Betts
* Copyright (C) 2010 Adam Sjøgren
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see
* <https://www.gnu.org/licenses/>.
*/
#ifndef XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
#define XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
#include "xapian/intrusive_ptr.h"
#include <xapian/database.h>
#include <xapian/query.h>
#include <xapian/queryparser.h>
#include <xapian/stem.h>
#include <list>
#include <map>
class State;
typedef enum { NON_BOOLEAN, BOOLEAN, BOOLEAN_EXCLUSIVE } filter_type;
/** Information about how to handle a field prefix in the query string. */
struct FieldInfo {
/// The type of this field.
filter_type type;
std::string grouping;
/// Field prefix strings.
std::vector<std::string> prefixes;
/// Field processor. Currently only one is supported.
Xapian::Internal::opt_intrusive_ptr<Xapian::FieldProcessor> proc;
explicit
FieldInfo(filter_type type_)
: type(type_)
{
}
FieldInfo(filter_type type_, std::string_view grouping_)
: type(type_), grouping(grouping_)
{
}
FieldInfo(filter_type type_, Xapian::FieldProcessor* proc_,
std::string_view grouping_ = {})
: type(type_), grouping(grouping_), proc(proc_)
{
}
FieldInfo& append(std::string_view prefix)
{
prefixes.emplace_back(prefix);
return *this;
}
};
namespace Xapian {
class Utf8Iterator;
struct RangeProc {
Xapian::Internal::opt_intrusive_ptr<RangeProcessor> proc;
std::string grouping;
bool default_grouping;
RangeProc(RangeProcessor * range_proc, const std::string* grouping_)
: proc(range_proc),
grouping(grouping_ ? *grouping_ : std::string()),
default_grouping(grouping_ == NULL) { }
};
class QueryParser::Internal : public Xapian::Internal::intrusive_base {
friend class QueryParser;
friend class ::State;
Stem stemmer;
stem_strategy stem_action = STEM_SOME;
Xapian::Internal::opt_intrusive_ptr<const Stopper> stopper;
stop_strategy stop_mode = STOP_STEMMED;
Query::op default_op = Query::OP_OR;
const char* errmsg = nullptr;
Database db;
std::list<std::string> stoplist;
std::multimap<std::string, std::string, std::less<>> unstem;
// Map "from" -> "A" ; "subject" -> "C" ; "newsgroups" -> "G" ;
// "foobar" -> "XFOO". FIXME: it does more than this now!
std::map<std::string, FieldInfo, std::less<>> field_map;
std::list<RangeProc> rangeprocs;
std::string corrected_query;
Xapian::termcount max_wildcard_expansion = 0;
Xapian::termcount max_partial_expansion = 100;
Xapian::termcount max_fuzzy_expansion = 0;
int max_wildcard_type = Xapian::Query::WILDCARD_LIMIT_ERROR;
int max_partial_type = Xapian::Query::WILDCARD_LIMIT_MOST_FREQUENT;
int max_fuzzy_type = Xapian::Query::WILDCARD_LIMIT_ERROR;
unsigned min_wildcard_prefix_len = 0;
unsigned min_partial_prefix_len = 2;
void add_prefix(std::string_view field, std::string_view prefix);
void add_prefix(std::string_view field, Xapian::FieldProcessor* proc);
void add_boolean_prefix(std::string_view field,
std::string_view prefix,
const std::string* grouping);
void add_boolean_prefix(std::string_view field,
Xapian::FieldProcessor* proc,
const std::string* grouping);
std::string parse_term(Utf8Iterator& it, const Utf8Iterator& end,
bool try_word_break, unsigned flags,
bool& needs_word_break, bool& was_acronym,
size_t& first_wildcard,
size_t& char_count,
unsigned& edit_distance);
public:
Internal() { }
Query parse_query(std::string_view query_string,
unsigned int flags,
std::string_view default_prefix);
};
}
#endif // XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
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