[#llvm-crc32-04]
= xref:llvm.adoc[llvm]::crc32
:relfileprefix: ../
:mrdocs:

Compute a running CRC‐32 over `Data` from a previous checksum.

== Synopsis

Declared in `<llvm/Support/CRC.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
uint32_t
crc32(
    uint32_t CRC,
    xref:llvm/ArrayRef-08.adoc[ArrayRef<uint8_t>] Data);
----

== Return Value

The updated CRC‐32 checksum.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *CRC*
| Previous CRC‐32 value to continue from.
| *Data*
| Bytes to fold into the checksum.
|===


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