[#OPENSSL_sk_find_all]
= OPENSSL_sk_find_all
:mrdocs:

Search for `data` and report how many matching elements exist.

== Synopsis

Declared in `<openssl/stack.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OPENSSL_sk_find_all(
    xref:OPENSSL_STACK.adoc[OPENSSL_STACK]* st,
    void const* data,
    int* pnum);
----

== Return Value

Zero‐based index of a match, or ‐1 if not found.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *st*
| Stack to search (sorted when a comparison function is set).
| *data*
| Value to locate.
| *pnum*
| Optional address updated to the number of matches (1 or 0 when no comparison function is set).
|===


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