mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 11:54:57 +00:00
15f95220ae
This was exposed to the user by mistake, and even accumulated a bunch of users that didn't blow up out of sheer luck.
108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
/*
|
|
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/ByteBuffer.h>
|
|
#include <AK/Function.h>
|
|
#include <AK/String.h>
|
|
#include <AK/Variant.h>
|
|
#include <LibSQL/Type.h>
|
|
|
|
namespace SQL {
|
|
|
|
/**
|
|
* A `Value` is an atomic piece of SQL data. A `Value` has a basic type
|
|
* (Text/String, Integer, Float, etc). Richer types are implemented in higher
|
|
* level layers, but the resulting data is stored in these `Value` objects.
|
|
*/
|
|
class Value {
|
|
public:
|
|
explicit Value(SQLType sql_type = SQLType::Text);
|
|
Value(SQLType sql_type, ByteBuffer& buffer, size_t& offset);
|
|
Value(Value const& other);
|
|
~Value();
|
|
|
|
static Value const& null();
|
|
|
|
Value& operator=(Value&& other) noexcept
|
|
{
|
|
(*this) = other;
|
|
return (*this);
|
|
}
|
|
Value& operator=(Value const& other);
|
|
Value& operator=(String const&);
|
|
Value& operator=(String&& string)
|
|
{
|
|
operator=(string);
|
|
return *this;
|
|
}
|
|
Value& operator=(int);
|
|
Value& operator=(u32);
|
|
Value& operator=(double);
|
|
Value& set_null();
|
|
|
|
Optional<String> to_string() const;
|
|
explicit operator String() const;
|
|
Optional<int> to_int() const;
|
|
explicit operator int() const;
|
|
Optional<double> to_double() const;
|
|
explicit operator double() const;
|
|
Optional<u32> to_u32() const;
|
|
explicit operator u32() const;
|
|
|
|
[[nodiscard]] SQLType type() const { return m_type; }
|
|
[[nodiscard]] const char* type_name() const { return m_type_name(); }
|
|
[[nodiscard]] size_t size() const { return m_size(); }
|
|
[[nodiscard]] int compare(Value const& other) const { return m_compare(other); }
|
|
[[nodiscard]] bool is_null() const { return m_is_null; }
|
|
[[nodiscard]] bool can_cast(Value const&) const;
|
|
[[nodiscard]] u32 hash() const { return (is_null()) ? 0 : m_hash(); }
|
|
|
|
bool operator==(Value const& other) const { return m_compare(other) == 0; }
|
|
bool operator==(String const& other) const;
|
|
bool operator==(int other) const;
|
|
bool operator==(double other) const;
|
|
bool operator!=(Value const& other) const { return m_compare(other) != 0; }
|
|
bool operator<(Value const& other) const { return m_compare(other) < 0; }
|
|
bool operator<=(Value const& other) const { return m_compare(other) <= 0; }
|
|
bool operator>(Value const& other) const { return m_compare(other) > 0; }
|
|
bool operator>=(Value const& other) const { return m_compare(other) >= 0; }
|
|
|
|
void serialize(ByteBuffer& buffer) const
|
|
{
|
|
VERIFY(!is_null());
|
|
m_serialize(buffer);
|
|
}
|
|
|
|
private:
|
|
void setup(SQLType sql_type);
|
|
void setup_text();
|
|
void setup_int();
|
|
void setup_float();
|
|
|
|
Function<Optional<String>()> m_to_string;
|
|
Function<Optional<int>()> m_to_int;
|
|
Function<Optional<double>()> m_to_double;
|
|
Function<void(Value const&)> m_assign_value;
|
|
Function<void(String const&)> m_assign_string;
|
|
Function<void(int)> m_assign_int;
|
|
Function<void(double)> m_assign_double;
|
|
Function<int(Value const&)> m_compare;
|
|
Function<void(ByteBuffer&)> m_serialize;
|
|
Function<void(ByteBuffer&, size_t& offset)> m_deserialize;
|
|
Function<size_t()> m_size;
|
|
Function<const char*()> m_type_name;
|
|
Function<bool(Value const&)> m_can_cast;
|
|
Function<u32()> m_hash;
|
|
|
|
SQLType m_type { SQLType::Text };
|
|
bool m_is_null { true };
|
|
|
|
Variant<String, int, double> m_impl;
|
|
};
|
|
|
|
}
|