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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | STANDARDS | CAVEATS | SEE ALSO | COLOPHON |
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roundup(3) Library Functions Manual roundup(3)
roundup - round up in steps
Standard C library (libc)
#include <sys/param.h>
roundup(x, step);
This macro rounds x to the nearest multiple of step that is not
less than x.
It is typically used for rounding up a pointer to align it or
increasing a buffer to be allocated.
This API is not designed to be generic, and doesn't work in some
cases that are not important for the typical use cases described
above. See CAVEATS.
This macro returns the rounded value.
None.
The arguments may be evaluated more than once.
x should be nonnegative, and step should be positive.
If x + step would overflow or wrap around, the behavior is
undefined.
ceil(3), floor(3), lrint(3), rint(3), lround(3), round(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
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for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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2024-06-26. If you discover any rendering problems in this HTML
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Linux man-pages 6.9.1 2024-05-02 roundup(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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