CLOG(3POSIX)

💖 hey bestie, welcome to clog(3POSIX) 💖

okay so this is a page from the POSIX Programmer's Manual, and it's filed under section 3POSIX. it's literally the glow-up guide to the complex natural logarithm functions. let's get into it 🫶

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✨ PROLOG ✨

ok so first things first, real talk: 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 might not even be implemented on Linux at all. 💀 no cap.

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🌸 NAME 🌸

clog, clogf, clogl — the complex natural logarithm functions. that's it, that's the whole vibe. 💅

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🎀 SYNOPSIS 🎀

#include <complex.h>

double complex clog(double complex z);
float complex clogf(float complex z);
long double complex clogl(long double complex z);

look at those three icons. one for each precision. obsessed. ✨

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🦋 DESCRIPTION 🦋

so here's the tea. the functionality described on this reference page is aligned with the ISO C standard. and if there's any conflict between the requirements described here and the ISO C standard? that conflict is unintentional, bestie, we promise. this volume of POSIX.1‐2017 defers to the ISO C standard. periodt.

now for the actual function behavior:

these functions shall compute the complex natural (base e) logarithm of z, with a branch cut along the negative real axis. that branch cut is the drama, iykyk. 👑

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🌈 RETURN VALUE 🌈

these functions shall return the complex natural logarithm value, sitting pretty in the range of a strip that's mathematically unbounded along the real axis, and in the interval [-iπ, +iπ] along the imaginary axis. iconic range honestly. 💜

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💀 ERRORS 💀

no errors are defined. literally none. nothing to see here. the vibes are immaculate and error-free. 🙈

the following sections are informative, so like, they're the bonus content, not the main character requirements:

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🍓 EXAMPLES 🍓

None.

(yeah. empty. a whole section of nothing. it's giving minimalist. 🎀)

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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 💅

• cexp()

also from the Base Definitions volume of POSIX.1‐2017: <complex.h>. go give those a read if you wanna be a well-rounded Unix girlie. 🌸

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👑 COPYRIGHT 👑

ok this is the boring-but-important part, so let's give it the respect it deserves:

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 .

and 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 .

real talk: that discrepancy clause matters. if this page and the actual standard ever disagree, the standard wins. always. 💯

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and that's the whole page, bestie!! brought to you by IEEE/The Open Group, 2017, under the CLOG(3POSIX) banner. now go log some complex numbers, you absolute icon. 🫶✨💖