[#BloombergLP-bdlbb-OutBlobStreamBuf-reset]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlbb.adoc[bdlbb]::xref:BloombergLP/bdlbb/OutBlobStreamBuf.adoc[OutBlobStreamBuf]::reset
:relfileprefix: ../../../
:mrdocs:

Reset the put position of this stream buffer&period;

== Synopsis

Declared in `&lt;bdlbb&lowbar;blobstreambuf&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
reset(xref:BloombergLP/bdlbb/Blob.adoc[bdlbb::Blob]* blob = 0);
----

== Description

Reset the put position of this buffer to the first location, available for writing in the underlying `bdlbb&colon;&colon;Blob`&period; Optionally specify a `blob` used to change current underlying `bdlbb&colon;&colon;Blob` value for&period; The behavior is undefined unless `blob` remains valid and externally unmodified for the lifetime of this `streambuf`&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *blob*
| optional replacement for the underlying blob&semi; if 0, keep the current blob
|===


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