[#BloombergLP-bdlde-Utf8CheckingInStreamBufWrapper-xsputn]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlde.adoc[bdlde]::xref:BloombergLP/bdlde/Utf8CheckingInStreamBufWrapper.adoc[Utf8CheckingInStreamBufWrapper]::xsputn
:relfileprefix: ../../../
:mrdocs:

Attempt to write characters; always fails in this input‐only wrapper.

== Synopsis

Declared in `<bdlde_utf8checkinginstreambufwrapper.h>`

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

== Description

Output function, not supported in this input‐only implementation; stubbed out, arguments ignored, returns 0. Note that this function is forwarded to by `sputn` in the base class.

== Return Value

0 (output is not supported)

== Parameters

[cols="1,4"]
|===
| Name| Description
| *buffer*
| unused output buffer (ignored)
| *numBytes*
| unused count of characters to write (ignored)
|===


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