aboutsummaryrefslogtreecommitdiff
path: root/paludis/repositories/e/e_keywords_key.cc
blob: d5f0c1415cf7407f7617701fa794641a4dd05cb5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/* vim: set sw=4 sts=4 et foldmethod=syntax : */

/*
 * Copyright (c) 2011, 2013 Ciaran McCreesh
 *
 * This file is part of the Paludis package manager. Paludis is free software;
 * you can redistribute it and/or modify it under the terms of the GNU General
 * Public License version 2, as published by the Free Software Foundation.
 *
 * Paludis 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, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <paludis/repositories/e/e_keywords_key.hh>
#include <paludis/repositories/e/eapi.hh>

#include <paludis/util/singleton-impl.hh>
#include <paludis/util/hashes.hh>
#include <paludis/util/singleton-impl.hh>
#include <paludis/util/pimp-impl.hh>
#include <paludis/util/join.hh>
#include <paludis/util/wrapped_output_iterator.hh>
#include <paludis/util/tokeniser.hh>
#include <paludis/util/create_iterator-impl.hh>

#include <paludis/name.hh>
#include <paludis/pretty_printer.hh>
#include <paludis/call_pretty_printer.hh>

#include <tuple>
#include <unordered_map>
#include <algorithm>

using namespace paludis;
using namespace paludis::erepository;

namespace
{
    struct EKeywordsKey :
        MetadataCollectionKey<Set<KeywordName> >
    {
        const std::shared_ptr<const Set<KeywordName> > parsed_value;
        const std::shared_ptr<const EAPIMetadataVariable> variable;
        const MetadataKeyType key_type;

        EKeywordsKey(
                const std::shared_ptr<const Set<KeywordName> > & v,
                const std::shared_ptr<const EAPIMetadataVariable> & m,
                const MetadataKeyType t) :
            parsed_value(v),
            variable(m),
            key_type(t)
        {
        }

        ~EKeywordsKey()
        {
        }

        const std::shared_ptr<const Set<KeywordName> > parse_value() const
        {
            return parsed_value;
        }

        const std::string raw_name() const
        {
            return variable->name();
        }

        const std::string human_name() const
        {
            return variable->description();
        }

        virtual MetadataKeyType type() const
        {
            return key_type;
        }

        virtual const std::string pretty_print_value(
                const PrettyPrinter & p,
                const PrettyPrintOptions &) const
        {
            return join(parsed_value->begin(), parsed_value->end(), " ", CallPrettyPrinter(p));
        }
    };

    typedef std::tuple<std::shared_ptr<const EAPIMetadataVariable>, std::shared_ptr<const Set<KeywordName> >, MetadataKeyType> EKeywordsKeyStoreIndex;

    long hash_set(const std::shared_ptr<const Set<KeywordName> > & v)
    {
        int result(0);
        for (auto s(v->begin()), s_end(v->end()) ;
                s != s_end ; ++s)
            result = (result << 4) ^ Hash<std::string>()(stringify(*s));
        return result;
    }

    struct EKeywordsKeyHash
    {
        std::size_t operator() (const EKeywordsKeyStoreIndex & p) const
        {
            return
                Hash<std::string>()(std::get<0>(p)->description()) ^
                std::get<0>(p)->flat_list_index() ^
                Hash<std::string>()(std::get<0>(p)->name()) ^
                hash_set(std::get<1>(p)) ^
                static_cast<int>(std::get<2>(p));
        }
    };

    struct EKeywordsKeyStoreCompare
    {
        bool operator() (const EKeywordsKeyStoreIndex & a, const EKeywordsKeyStoreIndex & b) const
        {
            return std::get<0>(a) == std::get<0>(b) && std::get<2>(a) == std::get<2>(b) &&
                std::get<1>(a)->size() == std::get<1>(b)->size() &&
                std::get<1>(a)->end() == std::mismatch(std::get<1>(a)->begin(), std::get<1>(a)->end(), std::get<1>(b)->begin()).first;
        }
    };
}

namespace paludis
{
    template <>
    struct Imp<EKeywordsKeyStore>
    {
        mutable std::mutex mutex;
        mutable std::unordered_map<EKeywordsKeyStoreIndex, std::shared_ptr<const EKeywordsKey>, EKeywordsKeyHash, EKeywordsKeyStoreCompare> store;
    };
}

EKeywordsKeyStore::EKeywordsKeyStore() :
    _imp()
{
}

EKeywordsKeyStore::~EKeywordsKeyStore() = default;

const std::shared_ptr<const MetadataCollectionKey<Set<KeywordName> > >
EKeywordsKeyStore::fetch(
        const std::shared_ptr<const EAPIMetadataVariable> & v,
        const std::string & s,
        const MetadataKeyType t) const
{
    std::unique_lock<std::mutex> lock(_imp->mutex);

    auto k(std::make_shared<Set<KeywordName> >());
    tokenise_whitespace(s, create_inserter<KeywordName>(k->inserter()));

    EKeywordsKeyStoreIndex x(v, k, t);
    auto i(_imp->store.find(x));
    if (i == _imp->store.end())
        i = _imp->store.insert(std::make_pair(x, std::make_shared<const EKeywordsKey>(k, v, t))).first;
    return i->second;
}