diff options
Diffstat (limited to 'man3/INFINITY.3')
-rw-r--r-- | man3/INFINITY.3 | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/man3/INFINITY.3 b/man3/INFINITY.3 deleted file mode 100644 index 0f8eab0..0000000 --- a/man3/INFINITY.3 +++ /dev/null @@ -1,85 +0,0 @@ -.\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>. -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.TH INFINITY 3 2023-10-31 "Linux man-pages 6.7" -.SH NAME -INFINITY, NAN, HUGE_VAL, HUGE_VALF, HUGE_VALL \- floating-point constants -.SH LIBRARY -Math library -.RI ( libm ) -.SH SYNOPSIS -.nf -.BR "#define _ISOC99_SOURCE" " /* See feature_test_macros(7) */" -.B #include <math.h> -.P -.B INFINITY -.P -.B NAN -.P -.B HUGE_VAL -.B HUGE_VALF -.B HUGE_VALL -.fi -.SH DESCRIPTION -The macro -.B INFINITY -expands to a -.I float -constant representing positive infinity. -.P -The macro -.B NAN -expands to a -.I float -constant representing a quiet NaN -(when supported). -A -.I quiet -NaN is a NaN ("not-a-number") that does not raise exceptions -when it is used in arithmetic. -The opposite is a -.I signaling -NaN. -See IEC 60559:1989. -.P -The macros -.BR HUGE_VAL , -.BR HUGE_VALF , -.B HUGE_VALL -expand to constants of types -.IR double , -.IR float , -and -.IR "long double" , -respectively, -that represent a large positive value, possibly positive infinity. -.SH STANDARDS -C11. -.SH HISTORY -C99. -.P -On a glibc system, the macro -.B HUGE_VAL -is always available. -Availability of the -.B NAN -macro can be tested using -.BR "#ifdef NAN" , -and similarly for -.BR INFINITY , -.BR HUGE_VALF , -.BR HUGE_VALL . -They will be defined by -.I <math.h> -if -.B _ISOC99_SOURCE -or -.B _GNU_SOURCE -is defined, or -.B __STDC_VERSION__ -is defined -and has a value not less than 199901L. -.SH SEE ALSO -.BR fpclassify (3), -.BR math_error (7) |