lbug 0.16.1

An in-process property graph database management system built for query speed and scalability
Documentation 
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

#include "function/arithmetic/modulo.h"

#include "common/exception/overflow.h"
#include "common/exception/runtime.h"
#include "common/type_utils.h"
#include "function/cast/functions/numeric_limits.h"
#include <format>

namespace lbug {
namespace function {

// reference from duckDB multiply.cpp
template<class SRC_TYPE, class DST_TYPE>
static inline bool tryModuloWithOverflowCheck(SRC_TYPE left, SRC_TYPE right, SRC_TYPE& result) {
    DST_TYPE uresult;
    if (left == NumericLimits<SRC_TYPE>::minimum() && right == -1) {
        return false;
    }
    uresult = static_cast<DST_TYPE>(left) % static_cast<DST_TYPE>(right);
    result = static_cast<SRC_TYPE>(uresult);
    return true;
}

struct TryModulo {
    template<class A, class B, class R>
    static inline bool operation(A& left, B& right, R& result);
};

template<>
bool inline TryModulo::operation(int8_t& left, int8_t& right, int8_t& result) {
    return tryModuloWithOverflowCheck<int8_t, int16_t>(left, right, result);
}

template<>
bool inline TryModulo::operation(int16_t& left, int16_t& right, int16_t& result) {
    return tryModuloWithOverflowCheck<int16_t, int32_t>(left, right, result);
}

template<>
bool inline TryModulo::operation(int32_t& left, int32_t& right, int32_t& result) {
    return tryModuloWithOverflowCheck<int32_t, int64_t>(left, right, result);
}

template<>
bool TryModulo::operation(int64_t& left, int64_t& right, int64_t& result) {
    if (left == NumericLimits<int64_t>::minimum() && right == -1) {
        return false;
    }
    return tryModuloWithOverflowCheck<int64_t, int64_t>(left, right, result);
}

template<>
void Modulo::operation(uint8_t& left, uint8_t& right, uint8_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    result = left % right;
}

template<>
void Modulo::operation(uint16_t& left, uint16_t& right, uint16_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    result = left % right;
}

template<>
void Modulo::operation(uint32_t& left, uint32_t& right, uint32_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    result = left % right;
}

template<>
void Modulo::operation(uint64_t& left, uint64_t& right, uint64_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    result = left % right;
}

template<>
void Modulo::operation(int8_t& left, int8_t& right, int8_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    if (!TryModulo::operation(left, right, result)) {
        throw common::OverflowException{std::format("Value {} % {} is not within INT8 range.",
            common::TypeUtils::toString(left), common::TypeUtils::toString(right))};
    }
}

template<>
void Modulo::operation(int16_t& left, int16_t& right, int16_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    if (!TryModulo::operation(left, right, result)) {
        throw common::OverflowException{std::format("Value {} % {} is not within INT16 range.",
            common::TypeUtils::toString(left), common::TypeUtils::toString(right))};
    }
}

template<>
void Modulo::operation(int32_t& left, int32_t& right, int32_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    if (!TryModulo::operation(left, right, result)) {
        throw common::OverflowException{std::format("Value {} % {} is not within INT32 range.",
            common::TypeUtils::toString(left), common::TypeUtils::toString(right))};
    }
}

template<>
void Modulo::operation(int64_t& left, int64_t& right, int64_t& result) {
    if (right == 0) {
        throw common::RuntimeException("Modulo by zero.");
    }
    if (!TryModulo::operation(left, right, result)) {
        throw common::OverflowException{std::format("Value {} % {} is not within INT64 range.",
            common::TypeUtils::toString(left), common::TypeUtils::toString(right))};
    }
}

template<>
void Modulo::operation(common::int128_t& left, common::int128_t& right, common::int128_t& result) {
    result = left % right;
}

template<>
void Modulo::operation(common::uint128_t& left, common::uint128_t& right,
    common::uint128_t& result) {
    result = left % right;
}

} // namespace function
} // namespace lbug