RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 05:17:35 +00:00
Code Issues Activity Actions

LibSQL: Support 64-bit integer values and handle overflow errors

Browse source 
Currently, integers are stored in LibSQL as 32-bit signed integers, even
if the provided type is unsigned. This resulted in a series of unchecked
unsigned-to-signed conversions, and prevented storing 64-bit values.
Further, mathematical operations were performed without similar checks,
and without checking for overflow.

This changes SQL::Value to behave like SQLite for INTEGER types. In
SQLite, the INTEGER type does not imply a size or signedness of the
underlying type. Instead, SQLite determines on-the-fly what type is
needed as values are created and updated.

To do so, the SQL::Value variant can now hold an i64 or u64 integer. If
a specific type is requested, invalid conversions are now explictly an
error (e.g. converting a stored -1 to a u64 will fail). When binary
mathematical operations are performed, we now try to coerce the RHS
value to a type that works with the LHS value, failing the operation if
that isn't possible. Any overflow or invalid operation (e.g. bitshifting
a 64-bit value by more than 64 bytes) is an error.
This commit is contained in:
Timothy Flynn 2022-12-11 11:44:11 -05:00 • committed by Tim Flynn
parent a1007c37a4
commit 72e41a7dbd
13 changed files with 1241 additions and 283 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Userland/Libraries/LibSQL/AST/Expression.cpp
View file

@ -128,15 +128,7 @@ ResultOr<Value> UnaryOperatorExpression::evaluate(ExecutionContext& context) con
return expression_value;
return Result { SQLCommand::Unknown, SQLErrorCode::NumericOperatorTypeMismatch, UnaryOperator_name(type()) };
case UnaryOperator::Minus:
if (expression_value.type() == SQLType::Integer) {
expression_value = -expression_value.to_int().value();
return expression_value;
}
if (expression_value.type() == SQLType::Float) {
expression_value = -expression_value.to_double().value();
return expression_value;
}
return Result { SQLCommand::Unknown, SQLErrorCode::NumericOperatorTypeMismatch, UnaryOperator_name(type()) };
return expression_value.negate();
case UnaryOperator::Not:
if (expression_value.type() == SQLType::Boolean) {
expression_value = !expression_value.to_bool().value();
@ -144,11 +136,7 @@ ResultOr<Value> UnaryOperatorExpression::evaluate(ExecutionContext& context) con
}
return Result { SQLCommand::Unknown, SQLErrorCode::BooleanOperatorTypeMismatch, UnaryOperator_name(type()) };
case UnaryOperator::BitwiseNot:
if (expression_value.type() == SQLType::Integer) {
expression_value = ~expression_value.to_u32().value();
return expression_value;
}
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOperatorTypeMismatch, UnaryOperator_name(type()) };
return expression_value.bitwise_not();
default:
VERIFY_NOT_REACHED();
}

4
Userland/Libraries/LibSQL/AST/Select.cpp
View file

@ -119,7 +119,7 @@ ResultOr<ResultSet> Select::execute(ExecutionContext& context) const
auto limit = TRY(m_limit_clause->limit_expression()->evaluate(context));
if (!limit.is_null()) {
auto limit_value_maybe = limit.to_u32();
auto limit_value_maybe = limit.to_int<size_t>();
if (!limit_value_maybe.has_value())
return Result { SQLCommand::Select, SQLErrorCode::SyntaxError, "LIMIT clause must evaluate to an integer value"sv };
@ -129,7 +129,7 @@ ResultOr<ResultSet> Select::execute(ExecutionContext& context) const
if (m_limit_clause->offset_expression() != nullptr) {
auto offset = TRY(m_limit_clause->offset_expression()->evaluate(context));
if (!offset.is_null()) {
auto offset_value_maybe = offset.to_u32();
auto offset_value_maybe = offset.to_int<size_t>();
if (!offset_value_maybe.has_value())
return Result { SQLCommand::Select, SQLErrorCode::SyntaxError, "OFFSET clause must evaluate to an integer value"sv };

2
Userland/Libraries/LibSQL/Database.cpp
View file

@ -165,7 +165,7 @@ ResultOr<NonnullRefPtr<TableDef>> Database::get_table(DeprecatedString const& sc
auto table_hash = table_def->hash();
auto column_key = ColumnDef::make_key(table_def);
for (auto it = m_table_columns->find(column_key); !it.is_end() && ((*it)["table_hash"].to_u32().value() == table_hash); ++it)
for (auto it = m_table_columns->find(column_key); !it.is_end() && ((*it)["table_hash"].to_int<u32>() == table_hash); ++it)
table_def->append_column(*it);
return table_def;

2
Userland/Libraries/LibSQL/Heap.h
View file

@ -33,7 +33,7 @@ class Heap : public Core::Object {
C_OBJECT(Heap);
public:
static constexpr inline u32 current_version = 2;
static constexpr inline u32 current_version = 3;
virtual ~Heap() override;

6
Userland/Libraries/LibSQL/Meta.cpp
View file

@ -59,9 +59,9 @@ Key ColumnDef::key() const
{
auto key = Key(index_def());
key["table_hash"] = parent_relation()->hash();
key["column_number"] = (int)column_number();
key["column_number"] = column_number();
key["column_name"] = name();
key["column_type"] = (int)type();
key["column_type"] = to_underlying(type());
return key;
}
@ -183,7 +183,7 @@ void TableDef::append_column(DeprecatedString name, SQLType sql_type)
void TableDef::append_column(Key const& column)
{
auto column_type = column["column_type"].to_int();
auto column_type = column["column_type"].to_int<UnderlyingType<SQLType>>();
VERIFY(column_type.has_value());
append_column(column["column_name"].to_deprecated_string(), static_cast<SQLType>(*column_type));

1
Userland/Libraries/LibSQL/Result.h
View file

@ -48,6 +48,7 @@ constexpr char const* command_tag(SQLCommand command)
S(DatabaseDoesNotExist, "Database '{}' does not exist") \
S(DatabaseUnavailable, "Database Unavailable") \
S(IntegerOperatorTypeMismatch, "Cannot apply '{}' operator to non-numeric operands") \
S(IntegerOverflow, "Operation would cause integer overflow") \
S(InternalError, "{}") \
S(InvalidDatabaseName, "Invalid database name '{}'") \
S(InvalidNumberOfPlaceholderValues, "Number of values does not match number of placeholders") \

544
Userland/Libraries/LibSQL/Value.cpp
View file

@ -12,11 +12,87 @@
#include <LibSQL/Serializer.h>
#include <LibSQL/TupleDescriptor.h>
#include <LibSQL/Value.h>
#include <math.h>
#include <string.h>
namespace SQL {
// We use the upper 4 bits of the encoded type to store extra information about the type. This
// includes if the value is null, and the encoded size of any integer type. Of course, this encoding
// only works if the SQL type itself fits in the lower 4 bits.
enum class SQLTypeWithCount {
#undef __ENUMERATE_SQL_TYPE
#define __ENUMERATE_SQL_TYPE(name, type) type,
ENUMERATE_SQL_TYPES(__ENUMERATE_SQL_TYPE)
#undef __ENUMERATE_SQL_TYPE
Count,
};
static_assert(to_underlying(SQLTypeWithCount::Count) <= 0x0f, "Too many SQL types for current encoding");
// Adding to this list is fine, but changing the order of any value here will result in LibSQL
// becoming unable to read existing .db files. If the order must absolutely be changed, be sure
// to bump Heap::current_version.
enum class TypeData : u8 {
Null = 1 << 4,
Int8 = 2 << 4,
Int16 = 3 << 4,
Int32 = 4 << 4,
Int64 = 5 << 4,
Uint8 = 6 << 4,
Uint16 = 7 << 4,
Uint32 = 8 << 4,
Uint64 = 9 << 4,
};
template<typename Callback>
static decltype(auto) downsize_integer(Integer auto value, Callback&& callback)
{
if constexpr (IsSigned<decltype(value)>) {
if (AK::is_within_range<i8>(value))
return callback(static_cast<i8>(value), TypeData::Int8);
if (AK::is_within_range<i16>(value))
return callback(static_cast<i16>(value), TypeData::Int16);
if (AK::is_within_range<i32>(value))
return callback(static_cast<i32>(value), TypeData::Int32);
return callback(value, TypeData::Int64);
} else {
if (AK::is_within_range<u8>(value))
return callback(static_cast<i8>(value), TypeData::Uint8);
if (AK::is_within_range<u16>(value))
return callback(static_cast<i16>(value), TypeData::Uint16);
if (AK::is_within_range<u32>(value))
return callback(static_cast<i32>(value), TypeData::Uint32);
return callback(value, TypeData::Uint64);
}
}
template<typename Callback>
static decltype(auto) downsize_integer(Value const& value, Callback&& callback)
{
VERIFY(value.is_int());
if (value.value().has<i64>())
return downsize_integer(value.value().get<i64>(), forward<Callback>(callback));
return downsize_integer(value.value().get<u64>(), forward<Callback>(callback));
}
template<typename Callback>
static ResultOr<Value> perform_integer_operation(Value const& lhs, Value const& rhs, Callback&& callback)
{
VERIFY(lhs.is_int());
VERIFY(rhs.is_int());
if (lhs.value().has<i64>()) {
if (auto rhs_value = rhs.to_int<i64>(); rhs_value.has_value())
return callback(lhs.to_int<i64>().value(), rhs_value.value());
} else {
if (auto rhs_value = rhs.to_int<u64>(); rhs_value.has_value())
return callback(lhs.to_int<u64>().value(), rhs_value.value());
}
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
}
Value::Value(SQLType type)
: m_type(type)
{
@ -28,22 +104,23 @@ Value::Value(DeprecatedString value)
{
}
Value::Value(int value)
: m_type(SQLType::Integer)
, m_value(value)
{
}
Value::Value(u32 value)
: m_type(SQLType::Integer)
, m_value(static_cast<int>(value)) // FIXME: Handle signed overflow.
{
}
Value::Value(double value)
: m_type(SQLType::Float)
, m_value(value)
{
if (trunc(value) == value) {
if (AK::is_within_range<i64>(value)) {
m_type = SQLType::Integer;
m_value = static_cast<i64>(value);
return;
}
if (AK::is_within_range<u64>(value)) {
m_type = SQLType::Integer;
m_value = static_cast<u64>(value);
return;
}
}
m_type = SQLType::Float;
m_value = value;
}
Value::Value(NonnullRefPtr<TupleDescriptor> descriptor, Vector<Value> values)
@ -122,6 +199,11 @@ bool Value::is_null() const
return !m_value.has_value();
}
bool Value::is_int() const
{
return m_value.has_value() && (m_value->has<i64>() || m_value->has<u64>());
}
DeprecatedString Value::to_deprecated_string() const
{
if (is_null())
@ -129,7 +211,7 @@ DeprecatedString Value::to_deprecated_string() const
return m_value->visit(
[](DeprecatedString const& value) -> DeprecatedString { return value; },
[](int value) -> DeprecatedString { return DeprecatedString::number(value); },
[](Integer auto value) -> DeprecatedString { return DeprecatedString::number(value); },
[](double value) -> DeprecatedString { return DeprecatedString::number(value); },
[](bool value) -> DeprecatedString { return value ? "true"sv : "false"sv; },
[](TupleValue const& value) -> DeprecatedString {
@ -143,33 +225,6 @@ DeprecatedString Value::to_deprecated_string() const
});
}
Optional<int> Value::to_int() const
{
if (is_null())
return {};
return m_value->visit(
[](DeprecatedString const& value) -> Optional<int> { return value.to_int(); },
[](int value) -> Optional<int> { return value; },
[](double value) -> Optional<int> {
if (value > static_cast<double>(NumericLimits<int>::max()))
return {};
if (value < static_cast<double>(NumericLimits<int>::min()))
return {};
return static_cast<int>(round(value));
},
[](bool value) -> Optional<int> { return static_cast<int>(value); },
[](TupleValue const&) -> Optional<int> { return {}; });
}
Optional<u32> Value::to_u32() const
{
// FIXME: Handle negative values.
if (auto result = to_int(); result.has_value())
return static_cast<u32>(result.value());
return {};
}
Optional<double> Value::to_double() const
{
if (is_null())
@ -184,7 +239,7 @@ Optional<double> Value::to_double() const
return {};
return result;
},
[](int value) -> Optional<double> { return static_cast<double>(value); },
[](Integer auto value) -> Optional<double> { return static_cast<double>(value); },
[](double value) -> Optional<double> { return value; },
[](bool value) -> Optional<double> { return static_cast<double>(value); },
[](TupleValue const&) -> Optional<double> { return {}; });
@ -203,7 +258,7 @@ Optional<bool> Value::to_bool() const
return false;
return {};
},
[](int value) -> Optional<bool> { return static_cast<bool>(value); },
[](Integer auto value) -> Optional<bool> { return static_cast<bool>(value); },
[](double value) -> Optional<bool> { return fabs(value) > NumericLimits<double>::epsilon(); },
[](bool value) -> Optional<bool> { return value; },
[](TupleValue const& value) -> Optional<bool> {
@ -242,20 +297,6 @@ Value& Value::operator=(DeprecatedString value)
return *this;
}
Value& Value::operator=(int value)
{
m_type = SQLType::Integer;
m_value = value;
return *this;
}
Value& Value::operator=(u32 value)
{
m_type = SQLType::Integer;
m_value = static_cast<int>(value); // FIXME: Handle signed overflow.
return *this;
}
Value& Value::operator=(double value)
{
m_type = SQLType::Float;
@ -318,7 +359,11 @@ size_t Value::length() const
// FIXME: This seems to be more of an encoded byte size rather than a length.
return m_value->visit(
[](DeprecatedString const& value) -> size_t { return sizeof(u32) + value.length(); },
[](int value) -> size_t { return sizeof(value); },
[](Integer auto value) -> size_t {
return downsize_integer(value, [](auto integer, auto) {
return sizeof(integer);
});
},
[](double value) -> size_t { return sizeof(value); },
[](bool value) -> size_t { return sizeof(value); },
[](TupleValue const& value) -> size_t {
@ -338,7 +383,14 @@ u32 Value::hash() const
return m_value->visit(
[](DeprecatedString const& value) -> u32 { return value.hash(); },
[](int value) -> u32 { return int_hash(value); },
[](Integer auto value) -> u32 {
return downsize_integer(value, [](auto integer, auto) {
if constexpr (sizeof(decltype(integer)) == 8)
return u64_hash(integer);
else
return int_hash(integer);
});
},
[](double) -> u32 { VERIFY_NOT_REACHED(); },
[](bool value) -> u32 { return int_hash(value); },
[](TupleValue const& value) -> u32 {
@ -364,8 +416,8 @@ int Value::compare(Value const& other) const
return m_value->visit(
[&](DeprecatedString const& value) -> int { return value.view().compare(other.to_deprecated_string()); },
[&](int value) -> int {
auto casted = other.to_int();
[&](Integer auto value) -> int {
auto casted = other.to_int<IntegerType<decltype(value)>>();
if (!casted.has_value())
return 1;
@ -427,16 +479,6 @@ bool Value::operator==(StringView value) const
return to_deprecated_string() == value;
}
bool Value::operator==(int value) const
{
return to_int() == value;
}
bool Value::operator==(u32 value) const
{
return to_u32() == value;
}
bool Value::operator==(double value) const
{
return to_double() == value;
@ -467,133 +509,218 @@ bool Value::operator>=(Value const& value) const
return compare(value) >= 0;
}
static Result invalid_type_for_numeric_operator(AST::BinaryOperator op)
template<typename Operator>
static Result invalid_type_for_numeric_operator(Operator op)
{
return { SQLCommand::Unknown, SQLErrorCode::NumericOperatorTypeMismatch, BinaryOperator_name(op) };
if constexpr (IsSame<Operator, AST::BinaryOperator>)
return { SQLCommand::Unknown, SQLErrorCode::NumericOperatorTypeMismatch, BinaryOperator_name(op) };
else if constexpr (IsSame<Operator, AST::UnaryOperator>)
return { SQLCommand::Unknown, SQLErrorCode::NumericOperatorTypeMismatch, UnaryOperator_name(op) };
else
static_assert(DependentFalse<Operator>);
}
ResultOr<Value> Value::add(Value const& other) const
{
if (auto double_maybe = to_double(); double_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value(double_maybe.value() + other_double_maybe.value());
if (auto int_maybe = other.to_int(); int_maybe.has_value())
return Value(double_maybe.value() + (double)int_maybe.value());
} else if (auto int_maybe = to_int(); int_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value(other_double_maybe.value() + (double)int_maybe.value());
if (auto other_int_maybe = other.to_int(); other_int_maybe.has_value())
return Value(int_maybe.value() + other_int_maybe.value());
if (is_int() && other.is_int()) {
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
Checked result { lhs };
result.add(rhs);
if (result.has_overflow())
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { result.value_unchecked() };
});
}
return invalid_type_for_numeric_operator(AST::BinaryOperator::Plus);
auto lhs = to_double();
auto rhs = other.to_double();
if (!lhs.has_value() || !rhs.has_value())
return invalid_type_for_numeric_operator(AST::BinaryOperator::Plus);
return Value { lhs.value() + rhs.value() };
}
ResultOr<Value> Value::subtract(Value const& other) const
{
if (auto double_maybe = to_double(); double_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value(double_maybe.value() - other_double_maybe.value());
if (auto int_maybe = other.to_int(); int_maybe.has_value())
return Value(double_maybe.value() - (double)int_maybe.value());
} else if (auto int_maybe = to_int(); int_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value((double)int_maybe.value() - other_double_maybe.value());
if (auto other_int_maybe = other.to_int(); other_int_maybe.has_value())
return Value(int_maybe.value() - other_int_maybe.value());
if (is_int() && other.is_int()) {
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
Checked result { lhs };
result.sub(rhs);
if (result.has_overflow())
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { result.value_unchecked() };
});
}
return invalid_type_for_numeric_operator(AST::BinaryOperator::Minus);
auto lhs = to_double();
auto rhs = other.to_double();
if (!lhs.has_value() || !rhs.has_value())
return invalid_type_for_numeric_operator(AST::BinaryOperator::Minus);
return Value { lhs.value() - rhs.value() };
}
ResultOr<Value> Value::multiply(Value const& other) const
{
if (auto double_maybe = to_double(); double_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value(double_maybe.value() * other_double_maybe.value());
if (auto int_maybe = other.to_int(); int_maybe.has_value())
return Value(double_maybe.value() * (double)int_maybe.value());
} else if (auto int_maybe = to_int(); int_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value((double)int_maybe.value() * other_double_maybe.value());
if (auto other_int_maybe = other.to_int(); other_int_maybe.has_value())
return Value(int_maybe.value() * other_int_maybe.value());
if (is_int() && other.is_int()) {
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
Checked result { lhs };
result.mul(rhs);
if (result.has_overflow())
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { result.value_unchecked() };
});
}
return invalid_type_for_numeric_operator(AST::BinaryOperator::Multiplication);
auto lhs = to_double();
auto rhs = other.to_double();
if (!lhs.has_value() || !rhs.has_value())
return invalid_type_for_numeric_operator(AST::BinaryOperator::Multiplication);
return Value { lhs.value() * rhs.value() };
}
ResultOr<Value> Value::divide(Value const& other) const
{
if (auto double_maybe = to_double(); double_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value(double_maybe.value() / other_double_maybe.value());
if (auto int_maybe = other.to_int(); int_maybe.has_value())
return Value(double_maybe.value() / (double)int_maybe.value());
} else if (auto int_maybe = to_int(); int_maybe.has_value()) {
if (auto other_double_maybe = other.to_double(); other_double_maybe.has_value())
return Value((double)int_maybe.value() / other_double_maybe.value());
if (auto other_int_maybe = other.to_int(); other_int_maybe.has_value())
return Value(int_maybe.value() / other_int_maybe.value());
}
return invalid_type_for_numeric_operator(AST::BinaryOperator::Division);
auto lhs = to_double();
auto rhs = other.to_double();
if (!lhs.has_value() || !rhs.has_value())
return invalid_type_for_numeric_operator(AST::BinaryOperator::Division);
if (rhs == 0.0)
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { lhs.value() / rhs.value() };
}
ResultOr<Value> Value::modulo(Value const& other) const
{
auto int_maybe_1 = to_int();
auto int_maybe_2 = other.to_int();
if (!int_maybe_1.has_value() || !int_maybe_2.has_value())
if (!is_int() || !other.is_int())
return invalid_type_for_numeric_operator(AST::BinaryOperator::Modulo);
return Value(int_maybe_1.value() % int_maybe_2.value());
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
Checked result { lhs };
result.mod(rhs);
if (result.has_overflow())
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { result.value_unchecked() };
});
}
ResultOr<Value> Value::negate() const
{
if (type() == SQLType::Integer) {
auto value = to_int<i64>();
if (!value.has_value())
return invalid_type_for_numeric_operator(AST::UnaryOperator::Minus);
return Value { value.value() * -1 };
}
if (type() == SQLType::Float)
return Value { -to_double().value() };
return invalid_type_for_numeric_operator(AST::UnaryOperator::Minus);
}
ResultOr<Value> Value::shift_left(Value const& other) const
{
auto u32_maybe = to_u32();
auto num_bytes_maybe = other.to_int();
if (!u32_maybe.has_value() || !num_bytes_maybe.has_value())
if (!is_int() || !other.is_int())
return invalid_type_for_numeric_operator(AST::BinaryOperator::ShiftLeft);
return Value(u32_maybe.value() << num_bytes_maybe.value());
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
using LHS = decltype(lhs);
using RHS = decltype(rhs);
static constexpr auto max_shift = static_cast<RHS>(sizeof(LHS) * 8);
if (rhs < 0 || rhs >= max_shift)
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { lhs << rhs };
});
}
ResultOr<Value> Value::shift_right(Value const& other) const
{
auto u32_maybe = to_u32();
auto num_bytes_maybe = other.to_int();
if (!u32_maybe.has_value() || !num_bytes_maybe.has_value())
if (!is_int() || !other.is_int())
return invalid_type_for_numeric_operator(AST::BinaryOperator::ShiftRight);
return Value(u32_maybe.value() >> num_bytes_maybe.value());
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) -> ResultOr<Value> {
using LHS = decltype(lhs);
using RHS = decltype(rhs);
static constexpr auto max_shift = static_cast<RHS>(sizeof(LHS) * 8);
if (rhs < 0 || rhs >= max_shift)
return Result { SQLCommand::Unknown, SQLErrorCode::IntegerOverflow };
return Value { lhs >> rhs };
});
}
ResultOr<Value> Value::bitwise_or(Value const& other) const
{
auto u32_maybe_1 = to_u32();
auto u32_maybe_2 = other.to_u32();
if (!u32_maybe_1.has_value() || !u32_maybe_2.has_value())
if (!is_int() || !other.is_int())
return invalid_type_for_numeric_operator(AST::BinaryOperator::BitwiseOr);
return Value(u32_maybe_1.value() | u32_maybe_2.value());
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) {
return Value { lhs | rhs };
});
}
ResultOr<Value> Value::bitwise_and(Value const& other) const
{
auto u32_maybe_1 = to_u32();
auto u32_maybe_2 = other.to_u32();
if (!u32_maybe_1.has_value() || !u32_maybe_2.has_value())
if (!is_int() || !other.is_int())
return invalid_type_for_numeric_operator(AST::BinaryOperator::BitwiseAnd);
return Value(u32_maybe_1.value() & u32_maybe_2.value());
return perform_integer_operation(*this, other, [](auto lhs, auto rhs) {
return Value { lhs & rhs };
});
}
static constexpr auto sql_type_null_as_flag = static_cast<u8>(SQLType::Null);
ResultOr<Value> Value::bitwise_not() const
{
if (!is_int())
return invalid_type_for_numeric_operator(AST::UnaryOperator::BitwiseNot);
return downsize_integer(*this, [](auto value, auto) {
return Value { ~value };
});
}
static u8 encode_type_flags(Value const& value)
{
auto type_flags = to_underlying(value.type());
if (value.is_null()) {
type_flags |= to_underlying(TypeData::Null);
} else if (value.is_int()) {
downsize_integer(value, [&](auto, auto type_data) {
type_flags |= to_underlying(type_data);
});
}
return type_flags;
}
void Value::serialize(Serializer& serializer) const
{
auto type_flags = static_cast<u8>(type());
if (is_null())
type_flags |= sql_type_null_as_flag;
auto type_flags = encode_type_flags(*this);
serializer.serialize<u8>(type_flags);
if (is_null())
return;
if (is_int()) {
downsize_integer(*this, [&](auto integer, auto) {
serializer.serialize(integer);
});
return;
}
m_value->visit(
[&](TupleValue const& value) {
serializer.serialize<TupleDescriptor>(*value.descriptor);
@ -608,16 +735,11 @@ void Value::serialize(Serializer& serializer) const
void Value::deserialize(Serializer& serializer)
{
auto type_flags = serializer.deserialize<u8>();
bool has_value = true;
if ((type_flags & sql_type_null_as_flag) && (type_flags != sql_type_null_as_flag)) {
type_flags &= ~sql_type_null_as_flag;
has_value = false;
}
auto type_data = static_cast<TypeData>(type_flags & 0xf0);
m_type = static_cast<SQLType>(type_flags & 0x0f);
m_type = static_cast<SQLType>(type_flags);
if (!has_value)
if (type_data == TypeData::Null)
return;
switch (m_type) {
@ -628,7 +750,35 @@ void Value::deserialize(Serializer& serializer)
m_value = serializer.deserialize<DeprecatedString>();
break;
case SQLType::Integer:
m_value = serializer.deserialize<int>(0);
switch (type_data) {
case TypeData::Int8:
m_value = static_cast<i64>(serializer.deserialize<i8>(0));
break;
case TypeData::Int16:
m_value = static_cast<i64>(serializer.deserialize<i16>(0));
break;
case TypeData::Int32:
m_value = static_cast<i64>(serializer.deserialize<i32>(0));
break;
case TypeData::Int64:
m_value = static_cast<i64>(serializer.deserialize<i64>(0));
break;
case TypeData::Uint8:
m_value = static_cast<u64>(serializer.deserialize<u8>(0));
break;
case TypeData::Uint16:
m_value = static_cast<u64>(serializer.deserialize<u16>(0));
break;
case TypeData::Uint32:
m_value = static_cast<u64>(serializer.deserialize<u32>(0));
break;
case TypeData::Uint64:
m_value = static_cast<u64>(serializer.deserialize<u64>(0));
break;
default:
VERIFY_NOT_REACHED();
break;
}
break;
case SQLType::Float:
m_value = serializer.deserialize<double>(0.0);
@ -673,11 +823,9 @@ ResultOr<NonnullRefPtr<TupleDescriptor>> Value::infer_tuple_descriptor(Vector<Va
template<>
bool IPC::encode(Encoder& encoder, SQL::Value const& value)
{
auto type_flags = to_underlying(value.type());
if (value.is_null())
type_flags |= SQL::sql_type_null_as_flag;
auto type_flags = encode_type_flags(value);
encoder << type_flags;
if (value.is_null())
return true;
@ -688,7 +836,9 @@ bool IPC::encode(Encoder& encoder, SQL::Value const& value)
encoder << value.to_deprecated_string();
break;
case SQL::SQLType::Integer:
encoder << value.to_int().value();
SQL::downsize_integer(value, [&](auto integer, auto) {
encoder << integer;
});
break;
case SQL::SQLType::Float:
encoder << value.to_double().value();
@ -704,46 +854,72 @@ bool IPC::encode(Encoder& encoder, SQL::Value const& value)
return true;
}
template<typename T>
static ErrorOr<void> decode_scalar(IPC::Decoder& decoder, SQL::Value& value)
{
T decoded {};
TRY(decoder.decode(decoded));
value = move(decoded);
return {};
}
template<>
ErrorOr<void> IPC::decode(Decoder& decoder, SQL::Value& value)
{
UnderlyingType<SQL::SQLType> type_flags;
u8 type_flags { 0 };
TRY(decoder.decode(type_flags));
if ((type_flags & SQL::sql_type_null_as_flag) && (type_flags != SQL::sql_type_null_as_flag)) {
type_flags &= ~SQL::sql_type_null_as_flag;
auto type_data = static_cast<SQL::TypeData>(type_flags & 0xf0);
auto type = static_cast<SQL::SQLType>(type_flags & 0x0f);
value = SQL::Value(static_cast<SQL::SQLType>(type_flags));
if (type_data == SQL::TypeData::Null) {
value = SQL::Value(type);
return {};
}
switch (static_cast<SQL::SQLType>(type_flags)) {
switch (type) {
case SQL::SQLType::Null:
break;
case SQL::SQLType::Text: {
DeprecatedString text;
TRY(decoder.decode(text));
value = move(text);
case SQL::SQLType::Text:
TRY(decode_scalar<DeprecatedString>(decoder, value));
break;
}
case SQL::SQLType::Integer: {
int number { 0 };
TRY(decoder.decode(number));
value = number;
case SQL::SQLType::Integer:
switch (type_data) {
case SQL::TypeData::Int8:
TRY(decode_scalar<i8>(decoder, value));
break;
case SQL::TypeData::Int16:
TRY(decode_scalar<i16>(decoder, value));
break;
case SQL::TypeData::Int32:
TRY(decode_scalar<i32>(decoder, value));
break;
case SQL::TypeData::Int64:
TRY(decode_scalar<i64>(decoder, value));
break;
case SQL::TypeData::Uint8:
TRY(decode_scalar<u8>(decoder, value));
break;
case SQL::TypeData::Uint16:
TRY(decode_scalar<u16>(decoder, value));
break;
case SQL::TypeData::Uint32:
TRY(decode_scalar<u32>(decoder, value));
break;
case SQL::TypeData::Uint64:
TRY(decode_scalar<u64>(decoder, value));
break;
default:
VERIFY_NOT_REACHED();
break;
}
break;
}
case SQL::SQLType::Float: {
double number { 0.0 };
TRY(decoder.decode(number));
value = number;
case SQL::SQLType::Float:
TRY(decode_scalar<double>(decoder, value));
break;
}
case SQL::SQLType::Boolean: {
bool boolean { false };
TRY(decoder.decode(boolean));
value = boolean;
case SQL::SQLType::Boolean:
TRY(decode_scalar<bool>(decoder, value));
break;
}
case SQL::SQLType::Tuple: {
Vector<SQL::Value> tuple;
TRY(decoder.decode(tuple));

87
Userland/Libraries/LibSQL/Value.h
View file

@ -7,6 +7,7 @@
#pragma once
#include <AK/Checked.h>
#include <AK/DeprecatedString.h>
#include <AK/Format.h>
#include <AK/Optional.h>
@ -17,58 +18,107 @@
#include <LibSQL/Forward.h>
#include <LibSQL/Result.h>
#include <LibSQL/Type.h>
#include <math.h>
namespace SQL {
template<typename T>
concept Boolean = SameAs<RemoveCVReference<T>, bool>;
template<typename T>
concept Integer = (Integral<T> && !Boolean<T>);
/**
* 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 {
template<Integer T>
using IntegerType = Conditional<IsSigned<T>, i64, u64>;
public:
explicit Value(SQLType sql_type = SQLType::Null);
explicit Value(DeprecatedString);
explicit Value(int);
explicit Value(u32);
explicit Value(double);
Value(Value const&);
Value(Value&&);
~Value();
static ResultOr<Value> create_tuple(NonnullRefPtr<TupleDescriptor>);
static ResultOr<Value> create_tuple(Vector<Value>);
explicit Value(Integer auto value)
: m_type(SQLType::Integer)
, m_value(static_cast<IntegerType<decltype(value)>>(value))
{
}
template<typename T>
requires(SameAs<RemoveCVReference<T>, bool>) explicit Value(T value)
explicit Value(Boolean auto value)
: m_type(SQLType::Boolean)
, m_value(value)
{
}
static ResultOr<Value> create_tuple(NonnullRefPtr<TupleDescriptor>);
static ResultOr<Value> create_tuple(Vector<Value>);
[[nodiscard]] SQLType type() const;
[[nodiscard]] StringView type_name() const;
[[nodiscard]] bool is_type_compatible_with(SQLType) const;
[[nodiscard]] bool is_null() const;
[[nodiscard]] bool is_int() const;
[[nodiscard]] auto const& value() const
{
VERIFY(m_value.has_value());
return *m_value;
}
[[nodiscard]] DeprecatedString to_deprecated_string() const;
[[nodiscard]] Optional<int> to_int() const;
[[nodiscard]] Optional<u32> to_u32() const;
[[nodiscard]] Optional<double> to_double() const;
[[nodiscard]] Optional<bool> to_bool() const;
[[nodiscard]] Optional<Vector<Value>> to_vector() const;
template<Integer T>
[[nodiscard]] Optional<T> to_int() const
{
if (is_null())
return {};
return m_value->visit(
[](DeprecatedString const& value) -> Optional<T> {
if constexpr (IsSigned<T>)
return value.to_int<T>();
else
return value.to_uint<T>();
},
[](Integer auto value) -> Optional<T> {
if (!AK::is_within_range<T>(value))
return {};
return static_cast<T>(value);
},
[](double value) -> Optional<T> {
if (!AK::is_within_range<T>(value))
return {};
return static_cast<T>(round(value));
},
[](bool value) -> Optional<T> { return static_cast<T>(value); },
[](TupleValue const&) -> Optional<T> { return {}; });
}
Value& operator=(Value);
Value& operator=(DeprecatedString);
Value& operator=(int);
Value& operator=(u32);
Value& operator=(double);
Value& operator=(Integer auto value)
{
m_type = SQLType::Integer;
m_value = static_cast<IntegerType<decltype(value)>>(value);
return *this;
}
ResultOr<void> assign_tuple(NonnullRefPtr<TupleDescriptor>);
ResultOr<void> assign_tuple(Vector<Value>);
template<typename T>
requires(SameAs<RemoveCVReference<T>, bool>) Value& operator=(T value)
Value& operator=(Boolean auto value)
{
m_type = SQLType::Boolean;
m_value = value;
@ -83,9 +133,14 @@ public:
[[nodiscard]] int compare(Value const&) const;
bool operator==(Value const&) const;
bool operator==(StringView) const;
bool operator==(int) const;
bool operator==(u32) const;
bool operator==(double) const;
template<Integer T>
bool operator==(T value)
{
return to_int<T>() == value;
}
bool operator!=(Value const&) const;
bool operator<(Value const&) const;
bool operator<=(Value const&) const;
@ -97,10 +152,12 @@ public:
ResultOr<Value> multiply(Value const&) const;
ResultOr<Value> divide(Value const&) const;
ResultOr<Value> modulo(Value const&) const;
ResultOr<Value> negate() const;
ResultOr<Value> shift_left(Value const&) const;
ResultOr<Value> shift_right(Value const&) const;
ResultOr<Value> bitwise_or(Value const&) const;
ResultOr<Value> bitwise_and(Value const&) const;
ResultOr<Value> bitwise_not() const;
[[nodiscard]] TupleElementDescriptor descriptor() const;
@ -112,7 +169,7 @@ private:
Vector<Value> values;
};
using ValueType = Variant<DeprecatedString, int, double, bool, TupleValue>;
using ValueType = Variant<DeprecatedString, i64, u64, double, bool, TupleValue>;
static ResultOr<NonnullRefPtr<TupleDescriptor>> infer_tuple_descriptor(Vector<Value> const& values);
Value(NonnullRefPtr<TupleDescriptor> descriptor, Vector<Value> values);