[#BloombergLP-bdlbb-Blob-prependDataBuffer-0c]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlbb.adoc[bdlbb]::xref:BloombergLP/bdlbb/Blob.adoc[Blob]::prependDataBuffer
:relfileprefix: ../../../
:mrdocs:

Insert the specified move‐insertable `buffer` before the beginning of this blob. The length of this blob is incremented by the length of the prepended buffer. The `buffer` is left in a valid but unspecified state. The behavior is undefined unless neither the total size of the resulting blob nor its total number of buffers exceeds `INT_MAX`. Note that this operation is equivalent to: ` const int n = blob.length(); blob.insertBuffer(0, MoveUtil::move(buffer)); blob.setLength(n + buffer.size()); ` but is more efficient.

== Synopsis

Declared in `<bdlbb_blob.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
prependDataBuffer(xref:BloombergLP/bslmf/MovableRef.adoc[bslmf::MovableRef<BlobBuffer>] buffer);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#