remquo(3)

1remquo(3)                  Library Functions Manual                  remquo(3)
2
3
4

NAME

6       remquo, remquof, remquol - remainder and part of quotient
7

LIBRARY

9       Math library (libm, -lm)
10

SYNOPSIS

12       #include <math.h>
13
14       double remquo(double x, double y, int *quo);
15       float remquof(float x, float y, int *quo);
16       long double remquol(long double x, long double y, int *quo);
17
18   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
19
20       remquo(), remquof(), remquol():
21           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
22

DESCRIPTION

24       These functions compute the remainder and part of the quotient upon di‐
25       vision of x by y.  A few bits of the quotient are stored  via  the  quo
26       pointer.  The remainder is returned as the function result.
27
28       The  value of the remainder is the same as that computed by the remain‐
29       der(3) function.
30
31       The value stored via the quo pointer has the sign of x / y  and  agrees
32       with the quotient in at least the low order 3 bits.
33
34       For  example,  remquo(29.0, 3.0)  returns -1.0 and might store 2.  Note
35       that the actual quotient might not fit in an integer.
36

RETURN VALUE

38       On success, these functions return the  same  value  as  the  analogous
39       functions described in remainder(3).
40
41       If x or y is a NaN, a NaN is returned.
42
43       If  x  is an infinity, and y is not a NaN, a domain error occurs, and a
44       NaN is returned.
45
46       If y is zero, and x is not a NaN, a domain error occurs, and a  NaN  is
47       returned.
48

ERRORS

50       See  math_error(7) for information on how to determine whether an error
51       has occurred when calling these functions.
52
53       The following errors can occur:
54
55       Domain error: x is an infinity or y is 0, and the other argument is not
56       a NaN
57              An invalid floating-point exception (FE_INVALID) is raised.
58
59       These functions do not set errno.
60

ATTRIBUTES

62       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
63       tributes(7).
64
65       ┌────────────────────────────────────────────┬───────────────┬─────────┐
66       │Interface                                   │ Attribute     │ Value   │
67       ├────────────────────────────────────────────┼───────────────┼─────────┤
68       │remquo(), remquof(), remquol()              │ Thread safety │ MT-Safe │
69       └────────────────────────────────────────────┴───────────────┴─────────┘
70

STANDARDS

72       C11, POSIX.1-2008.
73

HISTORY

75       glibc 2.1.  C99, POSIX.1-2001.
76