[#SipHashState-Compress1]
= xref:SipHashState.adoc[SipHashState]::Compress1
:relfileprefix: ../
:mrdocs:

Mutably compress one block into this state, with 1 SipRound&period;

== Synopsis

Declared in `&lt;crypto&sol;siphash&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;always&lowbar;inline&rsqb;&rsqb;
xref:SipHashState.adoc[SipHashState]&
Compress1(uint64&lowbar;t data) noexcept;
----

== Return Value

Reference to this state, to allow chaining&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *data*
| The 64&hyphen;bit block to compress&period;
|===


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