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

NAME

6       infnan - deal with infinite or not-a-number (NaN) result
7

SYNOPSIS

9       #include <math.h>
10
11       double infnan(int error);
12
13       Link with -lm.
14

DESCRIPTION

16       The infnan() function returns a suitable value for infinity and "not-a-
17       number" (NaN) results.  The value of error can be ERANGE  to  represent
18       infinity or anything else to represent NaN.  errno is also set.
19

RETURN VALUE

21       If error is ERANGE (Infinity), HUGE_VAL is returned.
22
23       If error is -ERANGE (-Infinity), -HUGE_VAL is returned.
24
25       If error is anything else, NAN is returned.
26

ERRORS

28       EDOM   The value of error is "not-a-number" (NaN).
29
30       ERANGE The value of error is positive infinity or negative infinity.
31

CONFORMING TO

33       4.3BSD.
34

NOTES

36       This  obsolete  function  was  provided  in libc4 and libc5, but is not
37       available in glibc2.
38

COLOPHON

40       This page is part of release 3.22 of the Linux  man-pages  project.   A
41       description  of  the project, and information about reporting bugs, can
42       be found at http://www.kernel.org/doc/man-pages/.
43
44
45
46GNU                               1993-06-02                         INFNAN(3)
Impressum