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

Copy the specified `numChars` from the specified `source` to the blob held by this streambuf, starting at the current put area location&period; The behavior is undefined unless 0 &lt;&equals; `numChars`&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
std::streamsize
xsputn(
    char&lowbar;type const* source,
    std::streamsize numChars) override;
----


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