iswprint(3)

✨ iswprint — test for printing wide character ✨

okay bestie, sit down, hydrate, and let's talk about iswprint from the iswprint(3) page 💖

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🫶 LIBRARY

Standard C library (libc, -lc) — she's built in, no extra linking drama, no cap.

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🌸 SYNOPSIS

#include <wctype.h>

int iswprint(wint_t wc);

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💅 DESCRIPTION

So iswprint() is literally the wide-character equivalent of the isprint(3) function, fr fr. What she does is test whether wc is a wide character that belongs to the wide-character class "print".

Now the tea on the "print" class: it is disjoint from the wide-character class "cntrl" — they do not overlap, not even a little. 🙅♀️

And the "print" class also contains the wide-character class "graph". So graph characters are chilling inside print's house. iykyk.

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⭐ RETURN VALUE

• If wc is a wide character belonging to the wide-character class "print" → she returns nonzero 🔥
• Otherwise → she returns zero 💀

That's it, that's the whole vibe check.

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🎀 ATTRIBUTES

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

• Interface: iswprint()
• Attribute: Thread safety
• Value: MT-Safe locale

So yes bestie, she's MT-Safe locale — write that down.

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👑 STANDARDS

C11, POSIX.1-2008. Iconic behavior, standardized, periodt.

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🌈 HISTORY

POSIX.1-2001, C99. She's been around, she's a legacy queen.

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📝 NOTES

The behavior of iswprint() depends on the LC_CTYPE category of the current locale. So like… your locale is the main character here. Change the locale, change the answer. Lowkey important, highkey true.

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🦋 SEE ALSO

• isprint(3)
• iswctype(3)

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okay that's the whole page, you're basically a wide-character expert now, so proud of you 🥹💜 this was Linux man-pages 6.20, dated 2026-02-08 — mwah, go forth and classify your wide characters responsibly 🎀✨