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

Copy the specified `numChars` from the specified `source` to the blob held by this streambuf, starting at the current put area location. The behavior is undefined unless 0 <= `numChars`.

== Synopsis

Declared in `<bdlbb_blobstreambuf.h>`

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


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