---
name: "uint64_unpack_big"
section: "3"
platform: "linux"
package: "libowfat-dev"
version: "0.32-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/uint64_unpack_big"
---

# uint64\_unpack\_big(3)

read an unsigned big-endian 64-bit integer

## NAME

uint64\_unpack\_big - read an unsigned big-endian 64-bit integer

## SYNTAX

**#include \<libowfat/uint64.h\>**

uint64 *u*;

void **uint64\_unpack\_big**(const char *s*\[4\],uint64 \**u*);

## DESCRIPTION

uint64 is a 64-bit unsigned integer type.

uint64\_unpack\_big portably reads a uint64 as stored on a big-endian architecture (i.e. in network byte order) from *s* and writes it into *u* in the native byte order.

## SEE ALSO

[uint64\_pack\_big(3)](/uint64_pack_big/3.md), [uint64\_unpack(3)](/uint64_unpack/3.md)