ISPUNCT(3POSIX)

📦 version 2017a, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💅 ISPUNCT — the POSIX Programmer's Manual, bestie edition

okay so we're in the POSIX Programmer's Manual (the 3POSIX section, iykyk) and this page is literally just ispunct and ispunct_l — the "is this a punctuation character??" girlies. let's get into it 🎀

🌸 PROLOG

Real talk before we start: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ — so if you're on Linux, go consult the corresponding Linux manual page for the deets on Linux behavior. OR, plot twist, the interface might not even be implemented on Linux at all. 🙈

✨ NAME

ispunct, ispunct_l — test for a punctuation character

🦋 SYNOPSIS

#include <ctype.h>

int ispunct(int c);
int ispunct_l(int c, locale_t locale);

💖 DESCRIPTION

So for ispunct(): 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 — no drama intended, fr. This volume of POSIX.1‐2017 defers to the ISO C standard. periodt.

The ispunct() and ispunct_l() functions shall test whether c is 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. 👑

The c argument is an int, the value of which the application shall ensure is a character representable as an unsigned char or equal to the value of the macro EOF. If the argument has any other value, the behavior is undefined. 🚨 (not me warning you twice, but like, don't do it.)

The behavior is undefined if the locale argument to ispunct_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. bestie please. 💀

🌈 RETURN VALUE

The ispunct() and ispunct_l() functions shall return non-zero if c is a punctuation character; otherwise, they shall return 0. that's it, that's the whole vibe check. ✨

🍓 ERRORS

No errors are defined.

The following sections are informative. (translation: the tea is optional but delicious 🧚)

🎀 EXAMPLES

None. (yes literally none, we're moving on 😭)

🫶 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 cowboy coding, bestie, we stay portable. 🌍

💜 RATIONALE

None.

⭐ FUTURE DIRECTIONS

None.

👑 SEE ALSO

  • isalnum()
  • isalpha()
  • isblank()
  • iscntrl()
  • isdigit()
  • isgraph()
  • islower()
  • isprint()
  • isspace()
  • isupper()
  • isxdigit()
  • setlocale()
  • uselocale()

The Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale, <ctype.h>, <locale.h>

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 .

and that's the whole page, bestie!! 🫶 this masterpiece was brought to you by IEEE/The Open Group, 2017 — mwah, iconic, no notes. ✨💅

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