shrinkBufferCapacity(to:)

Other members in extension

Types

• struct CopyBytesError

  Errors thrown when calling copyBytes.

• struct HexDecodingError

  An error that is thrown when an invalid hex encoded string was attempted to be written to a ByteBuffer.

• struct HexDumpFormat

  Describes a ByteBuffer hexDump format. Can be either xxd output compatible, or hexdump compatible.

• struct LengthPrefixError
• struct QUICBinaryEncodingStrategy

  A NIOBinaryIntegerEncodingStrategy which encodes bytes as defined in RFC 9000 § 16

Typealiases

Type members

• init()

  Return an empty ByteBuffer allocated with ByteBufferAllocator().

• init(ByteBufferView)

  Create a ByteBuffer from the given ByteBufferViews range.

• init(buffer: ByteBuffer)

  Create a fresh ByteBuffer containing the readable bytes of buffer.

• init<Bytes>(bytes: Bytes)

  Create a fresh ByteBuffer containing the bytes.

• init(dispatchData: DispatchData)

  Create a fresh ByteBuffer containing the bytes contained in the given DispatchData.

• init(from: Decoder) throws

  Creates a ByteByffer by decoding from a Base64 encoded single value container.

• init<I>(integer: I, endianness: Endianness, as: I.Type)

  Create a fresh ByteBuffer containing the bytes of the byte representation in the given endianness of integer.

• init(plainHexEncodedBytes: String) throws

  Create a fresh ByteBuffer containing the bytes decoded from the string representation of plainHexEncodedBytes.

• init(repeating: UInt8, count: Int)

  Create a fresh ByteBuffer containing count repetitions of byte.

• init(staticString: StaticString)

  Create a fresh ByteBuffer containing the bytes of the string encoded as UTF-8.

• init(string: String)

  Create a fresh ByteBuffer containing the bytes of the string encoded as UTF-8.

• init(substring: Substring)

  Create a fresh ByteBuffer containing the bytes of the string encoded as UTF-8.

• static func == (lhs: ByteBuffer, rhs: ByteBuffer) -> Bool

  Compare two ByteBuffer values. Two ByteBuffer values are considered equal if the readable bytes are equal.

Instance members

• var capacity: Int

  The current capacity of the storage of this ByteBuffer, this is not constant and does not signify the number of bytes that have been written to this ByteBuffer.

• var debugDescription: String
• var description: String

  A String describing this ByteBuffer including length and the bytes it contains (partially).

• var readableBytes: Int

  The number of bytes readable (readableBytes = writerIndex - readerIndex).

• var readableBytesView: ByteBufferView

  A view into the readable bytes of the ByteBuffer.

• var readerIndex: Int

  The reader index or the number of bytes previously read from this ByteBuffer. readerIndex is 0 for a newly allocated ByteBuffer.

• var storageCapacity: Int

  The current capacity of the underlying storage of this ByteBuffer. A COW slice of the buffer (e.g. readSlice(length: x)) will posses the same storageCapacity as the original buffer until new data is written.

• var writableBytes: Int

  The number of bytes writable until ByteBuffer will need to grow its underlying storage which will likely trigger a copy of the bytes.

• var writerIndex: Int

  The write index or the number of bytes previously written to this ByteBuffer. writerIndex is 0 for a newly allocated ByteBuffer.

• func clear()

  Set both reader index and writer index to 0. This will reset the state of this ByteBuffer to the state of a freshly allocated one, if possible without allocations. This is the cheapest way to recycle a ByteBuffer for a new use-case.

• func clear(minimumCapacity: Int)

  Set both reader index and writer index to 0. This will reset the state of this ByteBuffer to the state of a freshly allocated one, if possible without allocations. This is the cheapest way to recycle a ByteBuffer for a new use-case.

• func copyBytes(at: Int, to: Int, length: Int) throws -> Int

  Copies length bytes starting at the fromIndex to toIndex. Does not move the writer index.

• func discardReadBytes() -> Bool

  Discard the bytes before the reader index. The byte at index readerIndex before calling this method will be at index 0 after the call returns.

• func encode(to: Encoder) throws

  Encodes this buffer as a base64 string in a single value container.

• func getBytes(at: Int, length: Int) -> [UInt8]?

  Get length bytes starting at index and return the result as [UInt8]. This will not change the reader index. The selected bytes must be readable or else nil will be returned.

• func getDispatchData(at: Int, length: Int) -> DispatchData?

  Get the bytes at index from this ByteBuffer as a DispatchData. Does not move the reader index. The selected bytes must be readable or else nil will be returned.

• func getInteger<T>(at: Int, endianness: Endianness, as: T.Type) -> T?

  Get the integer at index from this ByteBuffer. Does not move the reader index. The selected bytes must be readable or else nil will be returned.

• func getLengthPrefixedSlice<Integer>(at: Int, endianness: Endianness, as: Integer.Type) -> ByteBuffer?

  Gets an Integer from self and gets a slice of that length from self and returns it.

• func getNullTerminatedString(at: Int) -> String?

  Get the string at index from this ByteBuffer decoding using the UTF-8 encoding. Does not move the reader index. The selected bytes must be readable or else nil will be returned.

• func getSlice(at: Int, length: Int) -> ByteBuffer?

  Returns a slice of size length bytes, starting at index. The ByteBuffer this is invoked on and the ByteBuffer returned will share the same underlying storage. However, the byte at index in this ByteBuffer will correspond to index 0 in the returned ByteBuffer. The readerIndex of the returned ByteBuffer will be 0, the writerIndex will be length.

• func getString(at: Int, length: Int) -> String?

  Get the string at index from this ByteBuffer decoding using the UTF-8 encoding. Does not move the reader index. The selected bytes must be readable or else nil will be returned.

• func hash(into: inout Hasher)

  The hash value for the readable bytes.

• func hexDump(format: HexDumpFormat) -> String

  Returns a hex dump of this ByteBuffer in a preferred HexDumpFormat.

• func modifyIfUniquelyOwned<T>((inout ByteBuffer) throws -> T) rethrows -> T?

  Modify this ByteBuffer if this ByteBuffer is known to uniquely own its storage.

• func moveReaderIndex(forwardBy: Int)

  Move the reader index forward by offset bytes.

• func moveReaderIndex(to: Int)

  Set the reader index to offset.

• func moveWriterIndex(forwardBy: Int)

  Move the writer index forward by offset bytes.

• func moveWriterIndex(to: Int)

  Set the writer index to offset.

• func readBytes(length: Int) -> [UInt8]?

  Read length bytes off this ByteBuffer, move the reader index forward by length bytes and return the result as [UInt8].

• func readDispatchData(length: Int) -> DispatchData?

  Read length bytes off this ByteBuffer and return them as a DispatchData. Move the reader index forward by length.

• func readEncodedInteger<Strategy, Integer>(as: Integer.Type, strategy: Strategy) -> Integer?

  Read a binary encoded integer, moving the readerIndex appropriately. If there are not enough bytes, nil is returned.

• func readInteger<T>(endianness: Endianness, as: T.Type) -> T?

  Read an integer off this ByteBuffer, move the reader index forward by the integer’s byte size and return the result.

• func readLengthPrefixed<Integer, Result>(endianness: Endianness, as: Integer.Type, readMessage: (ByteBuffer) throws -> Result?) throws -> Result?

  Reads an Integer from self, reads a slice of that length and passes it to readMessage. It is checked that readMessage returns a non-nil value.

• func readLengthPrefixedSlice<Integer>(endianness: Endianness, as: Integer.Type) -> ByteBuffer?

  Reads an Integer from self and reads a slice of that length from self and returns it.

• func readLengthPrefixedSlice<Strategy>(strategy: Strategy) -> ByteBuffer?

  Reads a slice which is prefixed with a length. The length will be read using strategy, and then that many bytes will be read to create a slice.

• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8, T9)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8).Type) -> (T1, T2, T3, T4, T5, T6, T7, T8)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6, T7>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7).Type) -> (T1, T2, T3, T4, T5, T6, T7)?
• func readMultipleIntegers<T1, T2, T3, T4, T5, T6>(endianness: Endianness, as: (T1, T2, T3, T4, T5, T6).Type) -> (T1, T2, T3, T4, T5, T6)?
• func readMultipleIntegers<T1, T2, T3, T4, T5>(endianness: Endianness, as: (T1, T2, T3, T4, T5).Type) -> (T1, T2, T3, T4, T5)?
• func readMultipleIntegers<T1, T2, T3, T4>(endianness: Endianness, as: (T1, T2, T3, T4).Type) -> (T1, T2, T3, T4)?
• func readMultipleIntegers<T1, T2, T3>(endianness: Endianness, as: (T1, T2, T3).Type) -> (T1, T2, T3)?
• func readMultipleIntegers<T1, T2>(endianness: Endianness, as: (T1, T2).Type) -> (T1, T2)?
• func readNullTerminatedString() -> String?

  Read a null terminated string off this ByteBuffer, decoding it as String using the UTF-8 encoding. Move the reader index forward by the string’s length and its null terminator.

• func readSlice(length: Int) -> ByteBuffer?

  Slice length bytes off this ByteBuffer and move the reader index forward by length. If enough bytes are readable the ByteBuffer returned by this method will share the underlying storage with the ByteBuffer the method was invoked on. The returned ByteBuffer will contain the bytes in the range readerIndex..<(readerIndex + length) of the original ByteBuffer. The readerIndex of the returned ByteBuffer will be 0, the writerIndex will be length.

• func readString(length: Int) -> String?

  Read length bytes off this ByteBuffer, decoding it as String using the UTF-8 encoding. Move the reader index forward by length.

• func readWithUnsafeMutableReadableBytes((UnsafeMutableRawBufferPointer) throws -> Int) rethrows -> Int

  Yields a mutable buffer pointer containing this ByteBuffer’s readable bytes. You may modify the yielded bytes. Will move the reader index by the number of bytes returned by body but leave writer index as it was.

• func readWithUnsafeMutableReadableBytes<T>((UnsafeMutableRawBufferPointer) throws -> (Int, T)) rethrows -> T

  Yields a mutable buffer pointer containing this ByteBuffer’s readable bytes. You may modify the yielded bytes. Will move the reader index by the number of bytes body returns in the first tuple component but leave writer index as it was.

• func readWithUnsafeReadableBytes((UnsafeRawBufferPointer) throws -> Int) rethrows -> Int

  Yields an immutable buffer pointer containing this ByteBuffer’s readable bytes. Will move the reader index by the number of bytes returned by body.

• func readWithUnsafeReadableBytes<T>((UnsafeRawBufferPointer) throws -> (Int, T)) rethrows -> T

  Yields an immutable buffer pointer containing this ByteBuffer’s readable bytes. Will move the reader index by the number of bytes body returns in the first tuple component.

• func reserveCapacity(Int)

  Reserves enough space to store the specified number of bytes.

• func reserveCapacity(minimumWritableBytes: Int)

  Reserves enough space to write at least the specified number of bytes.

• func setBuffer(ByteBuffer, at: Int) -> Int

  Copy buffer’s readable bytes into this ByteBuffer starting at index. Does not move any of the reader or writer indices.

• func setBytes(UnsafeRawBufferPointer, at: Int) -> Int

  Copy bytes into the ByteBuffer at index. Does not move the writer index.

• func setBytes<Bytes>(Bytes, at: Int) -> Int

  Copy the collection of bytes into the ByteBuffer at index. Does not move the writer index.

• func setDispatchData(DispatchData, at: Int) -> Int

  Write dispatchData into this ByteBuffer at index. Does not move the writer index.

• func setInteger<T>(T, at: Int, endianness: Endianness, as: T.Type) -> Int

  Write integer into this ByteBuffer starting at index. This does not alter the writer index.

• func setNullTerminatedString(String, at: Int) -> Int

  Write string null terminated into this ByteBuffer at index using UTF-8 encoding. Does not move the writer index.

• func setRepeatingByte(UInt8, count: Int, at: Int) -> Int

  Sets the given byte count times at the given index. Will reserve more memory if necessary. Does not move the writer index.

• func setStaticString(StaticString, at: Int) -> Int

  Write the static string into this ByteBuffer at index using UTF-8 encoding, moving the writer index forward appropriately.

• func setString(String, at: Int) -> Int

  Write string into this ByteBuffer at index using UTF-8 encoding. Does not move the writer index.

• func setSubstring(Substring, at: Int) -> Int

  Write substring into this ByteBuffer at index using UTF-8 encoding. Does not move the writer index.

• func slice() -> ByteBuffer

  Slice the readable bytes off this ByteBuffer without modifying the reader index. This method will return a ByteBuffer sharing the underlying storage with the ByteBuffer the method was invoked on. The returned ByteBuffer will contain the bytes in the range readerIndex..<writerIndex of the original ByteBuffer.

• func viewBytes(at: Int, length: Int) -> ByteBufferView?

  Returns a view into some portion of the readable bytes of a ByteBuffer.

• func withUnsafeMutableReadableBytes<T>((UnsafeMutableRawBufferPointer) throws -> T) rethrows -> T

  Yields a mutable buffer pointer containing this ByteBuffer’s readable bytes. You may modify those bytes.

• func withUnsafeMutableWritableBytes<T>((UnsafeMutableRawBufferPointer) throws -> T) rethrows -> T

  Yields the bytes currently writable (bytesWritable = capacity - writerIndex). Before reading those bytes you must first write to them otherwise you will trigger undefined behaviour. The writer index will remain unchanged.

• func withUnsafeReadableBytes<T>((UnsafeRawBufferPointer) throws -> T) rethrows -> T

  Yields a buffer pointer containing this ByteBuffer’s readable bytes.

• func withUnsafeReadableBytesWithStorageManagement<T>((UnsafeRawBufferPointer, Unmanaged<AnyObject>) throws -> T) rethrows -> T

  Yields a buffer pointer containing this ByteBuffer‘s readable bytes. You may hold a pointer to those bytes even after the closure returned iff you model the lifetime of those bytes correctly using the Unmanaged instance. If you don’t require the pointer after the closure returns, use withUnsafeReadableBytes.

• func withVeryUnsafeBytes<T>((UnsafeRawBufferPointer) throws -> T) rethrows -> T

  This vends a pointer to the storage of the ByteBuffer. It’s marked as very unsafe because it might contain uninitialised memory and it’s undefined behaviour to read it. In most cases you should use withUnsafeReadableBytes.

• func withVeryUnsafeBytesWithStorageManagement<T>((UnsafeRawBufferPointer, Unmanaged<AnyObject>) throws -> T) rethrows -> T

  See withUnsafeReadableBytesWithStorageManagement and withVeryUnsafeBytes.

• func withVeryUnsafeMutableBytes<T>((UnsafeMutableRawBufferPointer) throws -> T) rethrows -> T

  This vends a pointer to the storage of the ByteBuffer. It’s marked as very unsafe because it might contain uninitialised memory and it’s undefined behaviour to read it. In most cases you should use withUnsafeMutableWritableBytes.

• func writeBuffer(inout ByteBuffer) -> Int

  Write buffer’s readable bytes into this ByteBuffer starting at writerIndex. This will move both this ByteBuffer’s writer index as well as buffer’s reader index by the number of bytes readable in buffer.

• func writeBytes(UnsafeRawBufferPointer) -> Int

  Write bytes into this ByteBuffer. Moves the writer index forward by the number of bytes written.

• func writeBytes<Bytes>(Bytes) -> Int

  Write bytes, a Sequence of UInt8 into this ByteBuffer. Moves the writer index forward by the number of bytes written.

• func writeDispatchData(DispatchData) -> Int

  Write dispatchData into this ByteBuffer, moving the writer index forward appropriately.

• func writeEncodedInteger<Integer, Strategy>(Integer, strategy: Strategy) -> Int

  Write a binary encoded integer.

• func writeImmutableBuffer(ByteBuffer) -> Int
• func writeInteger<T>(T, endianness: Endianness, as: T.Type) -> Int

  Write integer into this ByteBuffer, moving the writer index forward appropriately.

• func writeLengthPrefixed<Integer>(endianness: Endianness, as: Integer.Type, writeMessage: (inout ByteBuffer) throws -> Int) throws -> Int

  Prefixes a message written by writeMessage with the number of bytes written as an Integer.

• func writeLengthPrefixed<Strategy>(strategy: Strategy, writeData: (_ buffer: inout ByteBuffer) throws -> Int) rethrows -> Int

  Prefixes bytes written by writeData with the number of bytes written. The number of bytes written is encoded using strategy.

• func writeLengthPrefixedBuffer<Strategy>(ByteBuffer, strategy: Strategy) -> Int

  Write the length of buffer using strategy. Then write the buffer.

• func writeLengthPrefixedBytes<Bytes, Strategy>(Bytes, strategy: Strategy) -> Int

  Write the length of bytes using strategy. Then write the bytes.

• func writeLengthPrefixedString<Strategy>(String, strategy: Strategy) -> Int

  Write the length of string using strategy. Then write the string.

• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8, T9>(T1, T2, T3, T4, T5, T6, T7, T8, T9, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8, T9).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7, T8>(T1, T2, T3, T4, T5, T6, T7, T8, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7, T8).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6, T7>(T1, T2, T3, T4, T5, T6, T7, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6, T7).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5, T6>(T1, T2, T3, T4, T5, T6, endianness: Endianness, as: (T1, T2, T3, T4, T5, T6).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4, T5>(T1, T2, T3, T4, T5, endianness: Endianness, as: (T1, T2, T3, T4, T5).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3, T4>(T1, T2, T3, T4, endianness: Endianness, as: (T1, T2, T3, T4).Type) -> Int
• func writeMultipleIntegers<T1, T2, T3>(T1, T2, T3, endianness: Endianness, as: (T1, T2, T3).Type) -> Int
• func writeMultipleIntegers<T1, T2>(T1, T2, endianness: Endianness, as: (T1, T2).Type) -> Int
• func writeNullTerminatedString(String) -> Int

  Write string into this ByteBuffer null terminated using UTF-8 encoding, moving the writer index forward appropriately.

• func writePlainHexEncodedBytes(String) throws -> Int

  Write ASCII hexadecimal string into this ByteBuffer as raw bytes, decoding the hexadecimal & moving the writer index forward appropriately. This method will throw if the string input is not of the “plain” hex encoded format.

• func writeRepeatingByte(UInt8, count: Int) -> Int

  Writes byte count times. Moves the writer index forward by the number of bytes written.

• func writeStaticString(StaticString) -> Int

  Write the static string into this ByteBuffer using UTF-8 encoding, moving the writer index forward appropriately.

• func writeString(String) -> Int

  Write string into this ByteBuffer using UTF-8 encoding, moving the writer index forward appropriately.

• func writeSubstring(Substring) -> Int

  Write substring into this ByteBuffer using UTF-8 encoding, moving the writer index forward appropriately.

• func writeWithUnsafeMutableBytes(minimumWritableBytes: Int, (UnsafeMutableRawBufferPointer) throws -> Int) rethrows -> Int

  This vends a pointer of the ByteBuffer at the writerIndex after ensuring that the buffer has at least minimumWritableBytes of writable bytes available.