[#bsl-basic_syncbuf-xsputn-04]
= xref:bsl.adoc[bsl]::xref:bsl/basic_syncbuf.adoc[basic_syncbuf]::xsputn
:relfileprefix: ../../
:mrdocs:

Write the specified `inputString` array of the specified `count` characters to the internal buffer. Return the number of characters successfully written.

== Synopsis

Declared in `<bslstl_syncbuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::streamsize
xsputn(
    xref:bsl/basic_syncbuf/char_type.adoc[char_type] const* inputString,
    std::streamsize count) override;
----


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