wmemcpy(3)

✨ wmemcpy(3) ✨

okay bestie, gather round, because today we're talking about wmemcpy from the Library Functions Manual, and honestly? she's the wide-character glow-up of a function you already know and love 💖

🌸 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 💅

so the way that wmemcpy() works is that she IS the wide-character equivalent of the memcpy(3) function. iconic lineage, no cap 👑

She copies n wide characters from the array starting at src to the array starting at dest. That's it, that's the whole job, and she does it flawlessly ✨

⚠️ okay but listen — the arrays may not overlap. like, at all. if you need to copy between overlapping arrays, use wmemmove(3) instead, bestie, she's built for that 💜

Also: the programmer must ensure that there is room for at least n wide characters at dest. That's on you, not on her. She will not check. She will not warn. She's just gonna do it 🙈

🦋 RETURN VALUE 🦋

wmemcpy() returns dest. That's the whole vibe — she hands you back the destination like "here you go queen, it's yours 🫶"

👑 ATTRIBUTES 👑

For an explanation of the terms used in this section, see attributes(7).

• wmemcpy() — Thread safety: MT-Safe 🔥

(translation: she's thread-safe, she's not out here causing chaos, periodt.)

⭐ STANDARDS ⭐

C11, POSIX.1-2008. Certified, official, documented 💅

🌈 HISTORY 🌈

POSIX.1-2001, C99. She's been around, she's got lore, she's a legacy icon 🎀

💀 SEE ALSO 💀

• memcpy(3)
• wcscpy(3)
• wmemmove(3)
• wmempcpy(3)

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and that's the whole page, bestie!! 🌸 this was brought to you by Linux man-pages 6.20, dated 2026-02-08, and she ate, she left no crumbs, fr fr 💖✨🧚