An owning class to represent a string in device memory. More...

#include <scalar.hpp>

Inheritance diagram for cudf::string_scalar:

Public Types
using	value_type = cudf::string_view
	The value type of the string scalar.

Public Member Functions
	string_scalar (string_scalar &&other)=default
	Move constructor for string_scalar. More...

string_scalar &	operator= (string_scalar const &other)=delete

string_scalar &	operator= (string_scalar &&other)=delete

	string_scalar (string_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new string scalar object by deep copying another string_scalar. More...

	string_scalar (std::string const &string, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new string scalar object. More...

	string_scalar (value_type const &source, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new string scalar object from string_view. More...

	string_scalar (rmm::device_scalar< value_type > &data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new string scalar object from string_view in device memory. More...

	string_scalar (rmm::device_buffer &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new string scalar object by moving an existing string data buffer. More...

	operator std::string () const
	Explicit conversion operator to get the value of the scalar in a host std::string.

std::string	to_string (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Get the value of the scalar in a host std::string. More...

value_type	value (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Get the value of the scalar as a string_view. More...

size_type	size () const
	Returns the size of the string in bytes. More...

char const *	data () const
	Returns a raw pointer to the string in device memory. More...

Public Member Functions inherited from cudf::scalar
scalar &	operator= (scalar const &other)=delete

scalar &	operator= (scalar &&other)=delete

data_type	type () const noexcept
	Returns the scalar's logical value type. More...

void	set_valid_async (bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream())
	Updates the validity of the value. More...

bool	is_valid (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Indicates whether the scalar contains a valid value. More...

bool *	validity_data ()
	Returns a raw pointer to the validity bool in device memory. More...

bool const *	validity_data () const
	Return a const raw pointer to the validity bool in device memory. More...

Protected Attributes
rmm::device_buffer	_data {}
	device memory containing the string

Protected Attributes inherited from cudf::scalar
data_type	_type {type_id::EMPTY}
	Logical type of value in the scalar.

rmm::device_scalar< bool >	_is_valid
	Device bool signifying validity.

Additional Inherited Members
Protected Member Functions inherited from cudf::scalar
	scalar (scalar &&other)=default
	Move constructor for scalar. More...

	scalar (scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new scalar object by deep copying another. More...

	scalar (data_type type, bool is_valid=false, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=rmm::mr::get_current_device_resource())
	Construct a new scalar object. More...

Detailed Description

An owning class to represent a string in device memory.

Definition at line 431 of file scalar.hpp.

Constructor & Destructor Documentation

◆ string_scalar() [1/6]

cudf::string_scalar::string_scalar ( string_scalar && other )

default

Move constructor for string_scalar.

Parameters

other The other string_scalar to move from.

◆ string_scalar() [2/6]

cudf::string_scalar::string_scalar	(	string_scalar const &	other,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::device_async_resource_ref	mr = `rmm::mr::get_current_device_resource()`
	)

Construct a new string scalar object by deep copying another string_scalar.

Parameters

other	The other string_scalar to copy.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

◆ string_scalar() [3/6]

cudf::string_scalar::string_scalar	(	std::string const &	string,
		bool	is_valid = `true`,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::device_async_resource_ref	mr = `rmm::mr::get_current_device_resource()`
	)

Construct a new string scalar object.

Exceptions

std::overflow_error If the size of the input string exceeds cudf::size_type

Parameters

string	The value of the string.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

◆ string_scalar() [4/6]

cudf::string_scalar::string_scalar	(	value_type const &	source,
		bool	is_valid = `true`,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::device_async_resource_ref	mr = `rmm::mr::get_current_device_resource()`
	)

Construct a new string scalar object from string_view.

Note that this function copies the data pointed by string_view.

Parameters

source	The string_view pointing the string value to copy.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

◆ string_scalar() [5/6]

cudf::string_scalar::string_scalar	(	rmm::device_scalar< value_type > &	data,
		bool	is_valid = `true`,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::device_async_resource_ref	mr = `rmm::mr::get_current_device_resource()`
	)

Construct a new string scalar object from string_view in device memory.

Note that this function copies the data pointed by string_view.

Parameters

data	The device_scalar of string_view pointing to the string value to copy.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

◆ string_scalar() [6/6]

cudf::string_scalar::string_scalar	(	rmm::device_buffer &&	data,
		bool	is_valid = `true`,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::device_async_resource_ref	mr = `rmm::mr::get_current_device_resource()`
	)

Construct a new string scalar object by moving an existing string data buffer.

Note that this constructor moves the existing buffer into the internal data buffer; no copy is performed.

Parameters

data	The existing buffer to take over.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

Member Function Documentation

◆ data()

char const* cudf::string_scalar::data ( ) const

Returns a raw pointer to the string in device memory.

Returns: a raw pointer to the string in device memory

◆ size()

size_type cudf::string_scalar::size ( ) const

Returns the size of the string in bytes.

Returns: The size of the string in bytes

◆ to_string()

std::string cudf::string_scalar::to_string ( rmm::cuda_stream_view stream = cudf::get_default_stream() ) const

Get the value of the scalar in a host std::string.

Parameters

stream CUDA stream used for device memory operations.

Returns: The value of the scalar in a host std::string

◆ value()

value_type cudf::string_scalar::value ( rmm::cuda_stream_view stream = cudf::get_default_stream() ) const

Get the value of the scalar as a string_view.

Parameters

stream CUDA stream used for device memory operations.

Returns: The value of the scalar as a string_view

The documentation for this class was generated from the following file:

scalar.hpp

Public Types

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ string_scalar() [1/6]

◆ string_scalar() [2/6]

◆ string_scalar() [3/6]

◆ string_scalar() [4/6]

◆ string_scalar() [5/6]

◆ string_scalar() [6/6]

Member Function Documentation

◆ data()

◆ size()

◆ to_string()

◆ value()