[#BUF_reverse]
= BUF&lowbar;reverse
:mrdocs:

Reverse `siz` bytes from `in` into `out` (or in place if `in` is NULL)&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
BUF&lowbar;reverse(
    unsigned char* out,
    unsigned char const* in,
    size&lowbar;t siz);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *out*
| Destination buffer&semi; may equal `in` when reversing in place with `in` non&hyphen;NULL, or the sole buffer when `in` is NULL&period;
| *in*
| Source bytes to reverse, or NULL to reverse `out` in place&period;
| *siz*
| Number of bytes to reverse&period;
|===


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