1LRINT(3)                   Linux Programmer's Manual                  LRINT(3)
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NAME

6       lrint,  lrintf,  lrintl,  llrint,  llrintf,  llrintl - round to nearest
7       integer
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SYNOPSIS

10       #include <math.h>
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12       long int lrint(double x);
13       long int lrintf(float x);
14       long int lrintl(long double x);
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16       long long int llrint(double x);
17       long long int llrintf(float x);
18       long long int llrintl(long double x);
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20       Link with -lm.
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22   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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24       All functions shown above:
25           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
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DESCRIPTION

28       These functions round their argument  to  the  nearest  integer  value,
29       using the current rounding direction (see fesetround(3)).
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31       Note  that  unlike  the rint(3) family of functions, the return type of
32       these functions differs from that of their arguments.
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RETURN VALUE

35       These functions return the rounded integer value.
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37       If x is a NaN or an infinity, or the rounded value is too large  to  be
38       stored  in  a long (long long in the case of the ll* functions), then a
39       domain error occurs, and the return value is unspecified.
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ERRORS

42       See math_error(7) for information on how to determine whether an  error
43       has occurred when calling these functions.
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45       The following errors can occur:
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47       Domain error: x is a NaN or infinite, or the rounded value is too large
48              An invalid floating-point exception (FE_INVALID) is raised.
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50       These functions do not set errno.
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VERSIONS

53       These functions first appeared in glibc in version 2.1.
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ATTRIBUTES

56       For   an   explanation   of   the  terms  used  in  this  section,  see
57       attributes(7).
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59       ┌───────────────────────────────┬───────────────┬─────────┐
60       │Interface                      │ Attribute     │ Value   │
61       ├───────────────────────────────┼───────────────┼─────────┤
62       │lrint(), lrintf(), lrintl(),   │ Thread safety │ MT-Safe │
63       │llrint(), llrintf(), llrintl() │               │         │
64       └───────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

66       C99, POSIX.1-2001, POSIX.1-2008.
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SEE ALSO

69       ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)
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COLOPHON

72       This page is part of release 4.15 of the Linux  man-pages  project.   A
73       description  of  the project, information about reporting bugs, and the
74       latest    version    of    this    page,    can     be     found     at
75       https://www.kernel.org/doc/man-pages/.
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79                                  2017-09-15                          LRINT(3)
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