FERAISEEXCEPT(3P)

✨ PROLOG ✨

ok so first things first bestie 💖 this 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 details on Linux behavior if that's your vibe), or the interface might not even be implemented on Linux at all. 🙈

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🌸 NAME 🌸

feraiseexcept — raise floating-point exception

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🦋 SYNOPSIS 🦋

#include <fenv.h>

int feraiseexcept(int excepts);

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💅 DESCRIPTION 💅

So the functionality described on this reference page is aligned with the ISO C standard. If there's any conflict between the requirements described here and the ISO C standard, that's unintentional, okay? Not on purpose. This volume of POSIX.1‐2017 defers to the ISO C standard. periodt. 👑

The feraiseexcept() function shall attempt to raise the supported floating-point exceptions represented by the excepts argument. The order in which these floating-point exceptions are raised is unspecified, except that if the excepts argument represents IEC 60559 valid coincident floating-point exceptions for atomic operations (namely overflow and inexact, or underflow and inexact), then overflow or underflow shall be raised before inexact. 🫶

Whether the feraiseexcept() function additionally raises the inexact floating-point exception whenever it raises the overflow or underflow floating-point exception is implementation-defined. iykyk.

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🎀 RETURN VALUE 🎀

If the argument is zero, or if all the specified exceptions were successfully raised, feraiseexcept() shall return zero. Otherwise, it shall return a non-zero value. that's it that's the tea ☕

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⭐ ERRORS ⭐

No errors are defined. literally none. iconic behavior honestly. ✨

The following sections are informative.

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🌈 EXAMPLES 🌈

None. 💀

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🍓 APPLICATION USAGE 🍓

The effect is intended to be similar to that of floating-point exceptions raised by arithmetic operations. Hence, enabled traps for floating-point exceptions raised by this function are taken. 🔥

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🧚 RATIONALE 🧚

Raising overflow or underflow is allowed to also raise inexact, because on some architectures the only practical way to raise an exception is to execute an instruction that has the exception as a side-effect. like, it's giving "we work with what we've got" 😭

The function is not restricted to accept only valid coincident expressions for atomic operations, so the function can be used to raise exceptions accrued over several operations. so versatile. main character energy fr fr. 💜

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👑 FUTURE DIRECTIONS 👑

None. 🎀

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💖 SEE ALSO 💖

• feclearexcept()
• fegetexceptflag()
• fetestexcept()

The Base Definitions volume of POSIX.1‐2017, <fenv.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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okay that's the whole page, you ate that bestie 💅 mwah. this was IEEE/The Open Group, 2017, page FERAISEEXCEPT(3P) — go raise some exceptions responsibly, ily, bye! 🦋✨