[#OSSL_DECODER_INSTANCE_get_input_structure]
= OSSL_DECODER_INSTANCE_get_input_structure
:mrdocs:

Return the input‐structure name configured for a decoder instance.

== Synopsis

Declared in `<openssl/decoder.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
OSSL_DECODER_INSTANCE_get_input_structure(
    xref:OSSL_DECODER_INSTANCE.adoc[OSSL_DECODER_INSTANCE]* decoder_inst,
    int* was_set);
----

== Return Value

Input‐structure name string, or NULL if unset.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *decoder_inst*
| Active decoder instance from a decode run.
| *was_set*
| Optional output set to 1 if an input structure was explicitly configured.
|===


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