1LRINT(3)                   Linux Programmer's Manual                  LRINT(3)
2
3
4

NAME

6       lrint,  lrintf,  lrintl,  llrint,  llrintf,  llrintl - round to nearest
7       integer
8

SYNOPSIS

10       #include <math.h>
11
12       long int lrint(double x);
13       long int lrintf(float x);
14       long int lrintl(long double x);
15
16       long long int llrint(double x);
17       long long int llrintf(float x);
18       long long int llrintl(long double x);
19
20       Link with -lm.
21
22   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
23
24       All functions shown above:
25           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
26

DESCRIPTION

28       These functions round their argument  to  the  nearest  integer  value,
29       using the current rounding direction (see fesetround(3)).
30
31       Note  that  unlike  the rint(3) family of functions, the return type of
32       these functions differs from that of their arguments.
33

RETURN VALUE

35       These functions return the rounded integer value.
36
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.
40

ERRORS

42       See math_error(7) for information on how to determine whether an  error
43       has occurred when calling these functions.
44
45       The following errors can occur:
46
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.
49
50       These functions do not set errno.
51

VERSIONS

53       These functions first appeared in glibc in version 2.1.
54

ATTRIBUTES

56       For   an   explanation   of   the  terms  used  in  this  section,  see
57       attributes(7).
58
59       ┌───────────────────────────────┬───────────────┬─────────┐
60Interface                      Attribute     Value   
61       ├───────────────────────────────┼───────────────┼─────────┤
62lrint(), lrintf(), lrintl(),   │ Thread safety │ MT-Safe │
63llrint(), llrintf(), llrintl() │               │         │
64       └───────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

66       C99, POSIX.1-2001, POSIX.1-2008.
67

SEE ALSO

69       ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)
70

COLOPHON

72       This page is part of release 5.02 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/.
76
77
78
79                                  2017-09-15                          LRINT(3)
Impressum