[#OPENSSL_strnlen]
= OPENSSL_strnlen
:mrdocs:

Return the length of `str,` limited to at most `maxlen` bytes.

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size_t
OPENSSL_strnlen(
    char const* str,
    size_t maxlen);
----

== Return Value

Number of non‐NUL bytes before the first NUL, or `maxlen` if none is found.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *str*
| Possibly non‐NUL‐terminated buffer to measure.
| *maxlen*
| Maximum number of bytes to examine.
|===


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