[#COMP_expand_block]
= COMP_expand_block
:mrdocs:

Decompress `ilen` bytes from `in` into `out` using a COMP_CTX.

== Synopsis

Declared in `<openssl/comp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
COMP_expand_block(
    xref:COMP_CTX.adoc[COMP_CTX]* ctx,
    unsigned char* out,
    int olen,
    unsigned char* in,
    int ilen);
----

== Return Value

Number of bytes written to `out,` or a negative value on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Compression context (for example zlib) that performs expansion.
| *out*
| Destination buffer for expanded data.
| *olen*
| Capacity of `out` in bytes.
| *in*
| Compressed input bytes.
| *ilen*
| Number of compressed bytes at `in.`
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#