iswgraph(3)

✨ iswgraph(3) ✨

okay bestie, welcome to the manual page for iswgraph() 🫶 this little icon lives in the Library Functions Manual and it's here to answer one very specific question for you: is this wide character graphic, or is it not? 💅

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🌸 LIBRARY 🌸

Standard C library (libc, -lc) — she's literally built in, no extra install needed, no cap ✨

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🎀 SYNOPSIS 🎀

#include <wctype.h>

int iswgraph(wint_t wc);

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💖 DESCRIPTION 💖

iswgraph() is the wide-character equivalent of the isgraph(3) function. glowed up, same energy ✨ She tests whether wc is a wide character belonging to the wide-character class "graph".

The wide-character class "graph" is a subclass of the wide-character class "print". So it's giving print-adjacent, but make it exclusive 💅

Since she's a subclass of "print", the wide-character class "graph" is disjoint from the wide-character class "cntrl". They do not overlap, periodt 🚫

The wide-character class "graph" is also disjoint from the wide-character class "space" — and therefore also disjoint from "blank", which is "space"'s subclass. Not a single crumb of overlap, she said no thank you 🙈

And here's the part that makes her iconic: the wide-character class "graph" contains all the wide characters from the wide-character class "print" except the space character. So it therefore contains the wide-character classes "alnum" and "punct" too. She's collecting classes like Pokémon 👑

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🔥 RETURN VALUE 🔥

• nonzero — wc is a wide character belonging to the wide-character class "graph" ✅
• zero — otherwise. nope, not graphic, not today bestie 💀

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🦋 ATTRIBUTES 🦋

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

• iswgraph() — Thread safety: MT-Safe locale 🌈

ngl the original had a whole table here, but bullet form hits different and it's the exact same info 🫶

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👑 STANDARDS 👑

C11, POSIX.1-2008. Certified, official, she's in the standard 💅

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🌈 HISTORY 🌈

POSIX.1-2001, C99. She's been around, she's got lore 📜✨

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💜 NOTES 💜

The behavior of iswgraph() depends on the LC_CTYPE category of the current locale. fr fr — set your locale and she'll act accordingly, don't skip this step 😭

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🍓 SEE ALSO 🍓

• isgraph(3)
• iswctype(3)

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okay that's the whole vibe, bestie 🎀 this was Linux man-pages 6.20, dated 2026-02-08, and honestly? she ate 💅 mwah, go check your wide chars responsibly 🫶✨