Struct hdbconnect::types::BLob

pub struct BLob(_);

BLOB implementation that is used within TypedValue::BLOB.

BLOB comes in two flavors, depending on whether we read it from the database or write it to the database.

Methods

impl BLOB

fn len(&self) -> Result<usize, PrtError>

Length of contained data.

fn is_empty(&self) -> Result<bool, PrtError>

Is container empty

fn ref_to_bytes(&self) -> Result<&Vec<u8>, PrtError>

Ref to the contained Vec.

fn into_bytes(self) -> Result<Vec<u8>, PrtError>

Converts into the contained Vec.

fn max_size(&self) -> usize

Returns the maximum size of the internal buffers.

Tests can verify that this value does not exceed lob_read_size + buf.len().

Trait Implementations

impl Clone for BLOB

fn clone(&self) -> BLOB

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BLOB

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Read for BLOB

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

unsafe fn initializer(&self) -> Initializer

🔬 This is a nightly-only experimental API. (read_initializer)

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chars(self) -> Chars<Self>

🔬 This is a nightly-only experimental API. (io)

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an [Iterator] over [char]s.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.