ISWPRINT(3POSIX)

💖 ISWPRINT(3POSIX) 💖

okay bestie, welcome to the POSIX Programmer's Manual ✨ this one's from the IEEE/The Open Group, 2017, and it's literally the whole vibe for iswprint. let's get into it 🫶

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🌸 PROLOG 🌸

so like, real talk first: this manual page is part of the POSIX Programmer's Manual. the Linux implementation of this interface may differ (so go check the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface may not even be implemented on Linux at all. no cap. 🙈

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✨ NAME ✨

iswprint, iswprint_l — test for a printable wide-character code 💅

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🎀 SYNOPSIS 🎀

#include <wctype.h>

int iswprint(wint_t wc);
int iswprint_l(wint_t wc, locale_t locale);

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🦋 DESCRIPTION 🦋

so for iswprint(): the functionality described on this reference page is aligned with the ISO C standard. and if there's any conflict between what's written here and the ISO C standard? that's unintentional, not a flex. this volume of POSIX.1‐2017 defers to the ISO C standard, periodt.

the iswprint() and iswprint_l() functions shall test whether wc is a wide-character code representing a character of class print in the current locale, or in the locale represented by locale, respectively. (see the Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale for the full lore 📖)

the wc argument is a wint_t, and the value of it? the application shall ensure it's 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. 😭 so pls don't do that.

🚨 and also: the behavior is undefined if the locale argument to iswprint_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. literally just don't, bestie.

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💜 RETURN VALUE 💜

the iswprint() and iswprint_l() functions shall return non-zero if wc is a printable wide-character code; otherwise, they shall return 0. that's it, that's the whole answer ✨

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🌈 ERRORS 🌈

No errors are defined. iconic, honestly. zero drama.

the following sections are informative — meaning they're just here for the vibes, not the rules 💅

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🍓 EXAMPLES 🍓

None. (sad, i know. we move.)

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🧚 APPLICATION USAGE 🧚

to ensure applications portability — especially across natural languages, which is a whole thing — only these functions and the functions in the reference pages listed in the SEE ALSO section should be used for character classification. iykyk 👑

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⭐ RATIONALE ⭐

None.

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🌸 FUTURE DIRECTIONS 🌸

None.

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👑 SEE ALSO 👑

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

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

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💖 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.

🫶 and fr fr: 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!! mwah 💋 this was IEEE/The Open Group, 2017, ISWPRINT(3POSIX) — thanks for reading, ily, go classify some characters responsibly 🎀✨💅