[#OSSL_PARAM_merge]
= OSSL_PARAM_merge
:mrdocs:

Merge two OSSL_PARAM arrays, with `p2` overriding duplicate keys from `p1.`

== Synopsis

Declared in `<openssl/params.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_PARAM.adoc[OSSL_PARAM]*
OSSL_PARAM_merge(
    xref:OSSL_PARAM.adoc[OSSL_PARAM] const* p1,
    xref:OSSL_PARAM.adoc[OSSL_PARAM] const* p2);
----

== Return Value

Newly allocated merged array freed with OSSL_PARAM_free(), or NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p1*
| First array terminated by OSSL_PARAM_construct_end(), or NULL.
| *p2*
| Second array terminated by OSSL_PARAM_construct_end(), or NULL.
|===


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