---
name: "wmemcpy"
section: "3"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/wmemcpy"
---

# wmemcpy(3)

copy an array of wide-characters

## NAME

wmemcpy - copy an array of wide-characters

## LIBRARY

Standard C library (*libc*, *-lc*)

## SYNOPSIS

```
#include <wchar.h>
```

**wchar\_t \*wmemcpy(**size\_t n;                  **wchar\_t** *dest***\[restrict** *n***\],**                  **const wchar\_t** *src***\[restrict** *n***\],**                  **size\_t** *n***);**

## DESCRIPTION

The **wmemcpy**() function is the wide-character equivalent of the [**memcpy**(3)](/memcpy/3.md) function. It copies *n* wide characters from the array starting at *src* to the array starting at *dest*.

The arrays may not overlap; use [**wmemmove**(3)](/wmemmove/3.md) to copy between overlapping arrays.

The programmer must ensure that there is room for at least *n* wide characters at *dest*.

## RETURN VALUE

**wmemcpy**() returns *dest*.

## ATTRIBUTES

For an explanation of the terms used in this section, see [**attributes**(7)](/attributes/7.md).

| | | |
| --- | --- | --- |
| **Interface** | **Attribute** | **Value** |
| **wmemcpy**() | Thread safety | MT-Safe |

## STANDARDS

C11, POSIX.1-2008.

## HISTORY

POSIX.1-2001, C99.

## SEE ALSO

[**memcpy**(3)](/memcpy/3.md), [**wcscpy**(3)](/wcscpy/3.md), [**wmemmove**(3)](/wmemmove/3.md), [**wmempcpy**(3)](/wmempcpy/3.md)