WCTOB(3P)

💖 WCTOB(3P) — the POSIX Programmer's Manual, bestie edition 💖

okay so this is a page from the POSIX Programmer's Manual (yes, that's the manual name, we're being ✨official✨ today), and before we dive in there's a lil heads-up you need to know about:

🫶 PROLOG 🫶

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. So like... check your local vibes first, bestie. 🙈

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✨ NAME ✨

wctob — wide-character to single-byte conversion

it's giving "glow up from wide to skinny" but for characters 💅

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🌸 SYNOPSIS 🌸

#include <stdio.h>
#include <wchar.h>

int wctob(wint_t c);

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💜 DESCRIPTION 💜

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. (no drama, ISO C is the main character here 👑)

So what does wctob() actually do? It shall determine whether c corresponds to a member of the extended character set whose character representation is a single byte when in the initial shift state. Basically: "hey, can you squeeze into one byte, or are you too much?" 🎀

And lowkey important — the behavior of this function shall be affected by the LC_CTYPE category of the current locale. Locale said what it said. 🌈

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🔥 RETURN VALUE 🔥

• If c does not correspond to a character with length one in the initial shift state, wctob() shall return EOF.
• Otherwise, it shall return the single-byte representation of that character as an unsigned char converted to int.

tl;dr — one byte or EOF, no in between, periodt. 💀

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💀 ERRORS 💀

No errors are defined.

The following sections are informative.

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🎀 EXAMPLES 🎀

None.

(iconic of them honestly — no examples, just vibes)

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🦋 APPLICATION USAGE 🦋

None.

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⭐ RATIONALE ⭐

None.

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🌈 FUTURE DIRECTIONS 🌈

None.

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👑 SEE ALSO 👑

• btowc()

The Base Definitions volume of POSIX.1‐2017, <stdio.h>, <wchar.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. 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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no cap, that copyright paragraph is a whole meal but we keep it because every single detail matters 🫶

and that's the whole page bestie!! brought to you by IEEE/The Open Group, dated 2017, signed off as WCTOB(3P) — stay single-byte, stay slay 💅✨