[#ossl_param_st-data_size]
= xref:ossl_param_st.adoc[ossl&lowbar;param&lowbar;st]::data&lowbar;size
:relfileprefix: ../
:mrdocs:

Size in bytes of the buffer at `data` (or of the pointed&hyphen;to value for PTR types)&period;

== Synopsis

Declared in `&lt;openssl&sol;core&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size&lowbar;t data&lowbar;size;
----


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