aboutsummaryrefslogtreecommitdiffstats
path: root/library/cpp/containers/comptrie/chunked_helpers_trie.h
blob: cfa35f5ba2a81d552a51cb41b210ebd0dc7ad8b0 (plain) (blame)
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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
#pragma once

#include <library/cpp/on_disk/chunks/chunked_helpers.h>

#include "comptrie.h"

class TTrieSet {
private:
    TCompactTrie<char> Trie;

public:
    TTrieSet(const TBlob& blob)
        : Trie(blob)
    {
    }

    bool Has(const char* key) const {
        return Trie.Find(key, strlen(key));
    }

    bool FindLongestPrefix(const char* key, size_t keylen, size_t* prefixLen) {
        return Trie.FindLongestPrefix(key, keylen, prefixLen);
    }
};

template <bool sorted = false>
class TTrieSetWriter {
private:
    TCompactTrieBuilder<char> Builder;

public:
    TTrieSetWriter(bool isSorted = sorted)
        : Builder(isSorted ? CTBF_PREFIX_GROUPED : CTBF_NONE)
    {
    }

    void Add(const char* key, size_t keylen) {
        Builder.Add(key, keylen, 0);
        assert(Has(((TString)key).substr(0, keylen).data()));
    }

    void Add(const char* key) {
        Add(key, strlen(key));
    }

    bool Has(const char* key) const {
        ui64 dummy;
        return Builder.Find(key, strlen(key), &dummy);
    }

    void Save(IOutputStream& out) const {
        Builder.Save(out);
    }

    void Clear() {
        Builder.Clear();
    }
};

template <bool isWriter, bool sorted = false>
struct TTrieSetG;

template <bool sorted>
struct TTrieSetG<false, sorted> {
    typedef TTrieSet T;
};

template <bool sorted>
struct TTrieSetG<true, sorted> {
    typedef TTrieSetWriter<sorted> T;
};

template <typename T>
class TTrieMap {
private:
    TCompactTrie<char> Trie;
    static_assert(sizeof(T) <= sizeof(ui64), "expect sizeof(T) <= sizeof(ui64)");

public:
    TTrieMap(const TBlob& blob)
        : Trie(blob)
    {
    }

    bool Get(const char* key, T* value) const {
        ui64 trieValue;
        if (Trie.Find(key, strlen(key), &trieValue)) {
            *value = ReadUnaligned<T>(&trieValue);
            return true;
        } else {
            return false;
        }
    }

    T Get(const char* key, T def = T()) const {
        ui64 trieValue;
        if (Trie.Find(key, strlen(key), &trieValue)) {
            return ReadUnaligned<T>(&trieValue);
        } else {
            return def;
        }
    }

    const TCompactTrie<char>& GetTrie() const {
        return Trie;
    }
};

template <typename T, bool sorted = false>
class TTrieMapWriter {
private:
    typedef TCompactTrieBuilder<char> TBuilder;
    TBuilder Builder;
    static_assert(sizeof(T) <= sizeof(ui64), "expect sizeof(T) <= sizeof(ui64)");
#ifndef NDEBUG
    bool IsSorted;
#endif

public:
    TTrieMapWriter(bool isSorted = sorted)
        : Builder(isSorted ? CTBF_PREFIX_GROUPED : CTBF_NONE)
#ifndef NDEBUG
        , IsSorted(isSorted)
#endif
    {
    }

    void Add(const char* key, const T& value) {
        ui64 intValue = 0;
        memcpy(&intValue, &value, sizeof(T));
        Builder.Add(key, strlen(key), intValue);
#ifndef NDEBUG
        /*
        if (!IsSorted) {
            T test;
            assert(Get(key, &test) && value == test);
        }
        */
#endif
    }

    void Add(const TString& s, const T& value) {
        ui64 intValue = 0;
        memcpy(&intValue, &value, sizeof(T));
        Builder.Add(s.data(), s.size(), intValue);
    }

    bool Get(const char* key, T* value) const {
        ui64 trieValue;
        if (Builder.Find(key, strlen(key), &trieValue)) {
            *value = ReadUnaligned<T>(&trieValue);
            return true;
        } else {
            return false;
        }
    }

    T Get(const char* key, T def = (T)0) const {
        ui64 trieValue;
        if (Builder.Find(key, strlen(key), &trieValue)) {
            return ReadUnaligned<T>(&trieValue);
        } else {
            return def;
        }
    }

    void Save(IOutputStream& out, bool minimize = false) const {
        if (minimize) {
            CompactTrieMinimize<TBuilder>(out, Builder, false);
        } else {
            Builder.Save(out);
        }
    }

    void Clear() {
        Builder.Clear();
    }
};

template <typename T>
class TTrieSortedMapWriter {
private:
    typedef std::pair<TString, T> TValue;
    typedef TVector<TValue> TValues;
    TValues Values;

public:
    TTrieSortedMapWriter() = default;

    void Add(const char* key, const T& value) {
        Values.push_back(TValue(key, value));
    }

    void Save(IOutputStream& out) {
        Sort(Values.begin(), Values.end());
        TTrieMapWriter<T, true> writer;
        for (typename TValues::const_iterator toValue = Values.begin(); toValue != Values.end(); ++toValue)
            writer.Add(toValue->first.data(), toValue->second);
        writer.Save(out);
    }

    void Clear() {
        Values.clear();
    }
};

template <typename X, bool isWriter, bool sorted = false>
struct TTrieMapG;

template <typename X, bool sorted>
struct TTrieMapG<X, false, sorted> {
    typedef TTrieMap<X> T;
};

template <typename X, bool sorted>
struct TTrieMapG<X, true, sorted> {
    typedef TTrieMapWriter<X, sorted> T;
};