Struct SpanWriter<T>

Represents simple memory writer backed by Span<T>.

Inherited Members

ValueType.Equals(object)

ValueType.GetHashCode()

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Namespace: DotNext.Buffers

Assembly: DotNext.dll

Syntax

public ref struct SpanWriter<T>

Type Parameters

Name	Description
T	The type of elements in the span.

Constructors

SpanWriter(Span<T>)

Initializes a new memory writer.

Declaration

public SpanWriter(Span<T> span)

Parameters

Type	Name	Description
Span<T>	span	The span used to write elements.

SpanWriter(ref T, int)

Initializes a new memory writer.

Declaration

public SpanWriter(ref T reference, int length)

Parameters

Type	Name	Description
T	reference	Managed pointer to the memory block.
int	length	The length of the elements referenced by the pointer.

Exceptions

Type	Condition
ArgumentOutOfRangeException	length is negative.

Properties

Current

Gets the element at the current position in the underlying memory block.

Declaration

public readonly ref T Current { get; }

Property Value

Type	Description
T

Exceptions

Type	Condition
InvalidOperationException	The position of this writer is out of range.

FreeCapacity

Gets the available space in the underlying span.

Declaration

public readonly int FreeCapacity { get; }

Property Value

Type	Description
int

RemainingSpan

Gets the remaining part of the span.

Declaration

public readonly Span<T> RemainingSpan { get; }

Property Value

Type	Description
Span<T>

Span

Gets underlying span.

Declaration

public readonly Span<T> Span { get; }

Property Value

Type	Description
Span<T>

WrittenCount

Gets the number of occupied elements in the underlying span.

Declaration

public int WrittenCount { readonly get; set; }

Property Value

Type	Description
int

WrittenSpan

Gets the span over written elements.

Declaration

public readonly Span<T> WrittenSpan { get; }

Property Value

Type	Description
Span<T>	The segment of underlying span containing written elements.

Methods

Add()

Adds single element and returns a reference to it.

Declaration

public ref T Add()

Returns

Type	Description
T	The reference to the added element.

Exceptions

Type	Condition
InternalBufferOverflowException	Remaining space in the underlying span is not enough to place the item.

Add(T)

Puts single element into the underlying span.

Declaration

public void Add(T item)

Parameters

Type	Name	Description
T	item	The item to place.

Exceptions

Type	Condition
InternalBufferOverflowException	Remaining space in the underlying span is not enough to place the item.

Advance(int)

Advances the position of this writer.

Declaration

public void Advance(int count)

Parameters

Type	Name	Description
int	count	The number of written elements.

Exceptions

Type	Condition
ArgumentOutOfRangeException	count is greater than the available space in the rest of the memory block.

Reset()

Sets writer position to the first element.

Declaration

public void Reset()

Rewind(int)

Moves the writer back the specified number of items.

Declaration

public void Rewind(int count)

Parameters

Type	Name	Description
int	count	The number of items.

Exceptions

Type	Condition
ArgumentOutOfRangeException	count is less than zero or greater than WrittenCount.

Slide(int)

Obtains the portion of underlying span and marks it as written.

Declaration

public Span<T> Slide(int count)

Parameters

Type	Name	Description
int	count	The size of the segment.

Returns

Type	Description
Span<T>	The portion of the underlying span.

Exceptions

Type	Condition
ArgumentOutOfRangeException	count is negative or greater than FreeCapacity.

ToString()

Gets the textual representation of the written content.

Declaration

public override readonly string ToString()

Returns

Type	Description
string	The textual representation of the written content.

Overrides

ValueType.ToString()

TryAdd(T)

Puts single element into the underlying span.

Declaration

public bool TryAdd(T item)

Parameters

Type	Name	Description
T	item	The item to place.

Returns

Type	Description
bool	true if item has beem placed successfully; false if remaining space in the underlying span is not enough to place the item.

TrySlide(int, out Span<T>)

Obtains the portion of underlying span and marks it as written.

Declaration

public bool TrySlide(int count, out Span<T> segment)

Parameters

Type	Name	Description
int	count	The size of the segment.
Span<T>	segment	The portion of the underlying span.

Returns

Type	Description
bool	true if segment is obtained successfully; false if remaining space in the underlying span is not enough to place count elements.

Exceptions

Type	Condition
ArgumentOutOfRangeException	count is negative.

TryWrite(scoped ReadOnlySpan<T>)

Copies the elements to the underlying span.

Declaration

public bool TryWrite(scoped ReadOnlySpan<T> input)

Parameters

Type	Name	Description
ReadOnlySpan<T>	input	The span to copy from.

Returns

Type	Description
bool	true if all elements are copied successfully; false if remaining space in the underlying span is not enough to place all elements from input.

TryWrite<TArg>(delegate*<TArg, Span<T>, out int, bool>, TArg)

Attempts to write a portion of data.

Declaration

[CLSCompliant(false)]
public bool TryWrite<TArg>(delegate*<TArg, Span<T>, out int, bool> action, TArg arg)

Parameters

Type	Name	Description
delegate*<TArg, Span<T>, out int, bool>	action	The action responsible for writing elements.
TArg	arg	The state to be passed to the action.

Returns

Type	Description
bool	true if all elements are written successfully; otherwise, false.

Type Parameters

Name	Description
TArg	The type of the argument to be passed to the callback.

Exceptions

Type	Condition
ArgumentNullException	action is zero.

Write(scoped ReadOnlySpan<T>)

Copies the elements to the underlying span.

Declaration

public int Write(scoped ReadOnlySpan<T> input)

Parameters

Type	Name	Description
ReadOnlySpan<T>	input	The span of elements to copy from.

Returns

Type	Description
int	The number of written elements.

Write<TArg>(delegate*<TArg, Span<T>, void>, TArg, int)

Writes a portion of data.

Declaration

[CLSCompliant(false)]
public void Write<TArg>(delegate*<TArg, Span<T>, void> action, TArg arg, int count)

Parameters

Type	Name	Description
delegate*<TArg, Span<T>, void>	action	The action responsible for writing elements.
TArg	arg	The state to be passed to the action.
int	count	The number of the elements to be written.

Type Parameters

Name	Description
TArg	The type of the argument to be passed to the callback.

Exceptions

Type	Condition
ArgumentNullException	action is zero.
ArgumentOutOfRangeException	count is negative or greater than FreeCapacity.