ISWPUNCT(3P)

🌸 ISWPUNCT(3P) — the POSIX Programmer's Manual, bestie edition 🌸

okay so before literally anything else, you need the ✨ PROLOG ✨ tea:

🫶 PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so like, go check the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface may just not be implemented on Linux at all. 🙈

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💖 NAME

iswpunct, iswpunct_l — the little functions that test for a punctuation wide-character code. that's it, that's the job. 💅

✨ SYNOPSIS

#include <wctype.h>

int iswpunct(wint_t wc);
int iswpunct_l(wint_t wc, locale_t locale);

look at them. two lil guys. iconic. 👑

🦋 DESCRIPTION

so for iswpunct(): the functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2017 defers to the ISO C standard. (translation: ISO C is the referee, we're just the commentary 🎀)

The iswpunct() and iswpunct_l() functions shall test whether wc is a wide-character code representing a character of class punct in the current locale, or in the locale represented by locale, respectively; see the Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale. 📖

okay so the wc argument is a wint_t, and the value of it — the application shall ensure — is a wide-character code corresponding to a valid character in the locale used by the function, or equal to the value of the macro WEOF.

⚠️ If the argument has any other value, the behavior is undefined. not "kinda weird", not "a little off" — undefined. do not do this. 💀

And another one, bestie:

🚨 The behavior is undefined if the locale argument to iswpunct_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. no cap.

🌈 RETURN VALUE

• iswpunct() and iswpunct_l() shall return non-zero if wc is a punctuation wide-character code.
• otherwise, they shall return 0.

that's the whole vibe check. nonzero = yes queen, zero = no. 💅

🍓 ERRORS

No errors are defined. ✨

The following sections are informative. (so like, the lore continues but it's bonus content 📚)

🧚 EXAMPLES

None. 😭 not a single one. we move.

💜 APPLICATION USAGE

To ensure applications portability — especially across natural languages — only these functions and the functions in the reference pages listed in the SEE ALSO section should be used for character classification. no DIY-ing your own classifier, iykyk. 🫶

👑 RATIONALE

None.

⭐ FUTURE DIRECTIONS

None.

🌸 SEE ALSO

• iswalnum()
• iswalpha()
• iswcntrl()
• iswctype()
• iswdigit()
• iswgraph()
• iswlower()
• iswprint()
• iswspace()
• iswupper()
• iswxdigit()
• setlocale()
• uselocale()

Also, the Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale, plus <locale.h> and <wctype.h>. 💖

📜 COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . 🔗

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . 🐛

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and that's the whole page, bestie!! this one came from IEEE/The Open Group, 2017 — so when you're citing it in your head, that's the source and the date. stay punctuation-aware out there 💅✨🎀