nextup(3) Library Functions Manual nextup(3) NAME nextup, nextupf, nextupl, nextdown, nextdownf, nextdownl - return next floating-point number toward positive/negative infinity LIBRARY Math library (libm, -lm) SYNOPSIS #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <math.h> double nextup(double x); float nextupf(float x); long double nextupl(long double x); double nextdown(double x); float nextdownf(float x); long double nextdownl(long double x); DESCRIPTION The nextup(), nextupf(), and nextupl() functions return the next repre- sentable floating-point number greater than x. If x is the smallest representable negative number in the corresponding type, these functions return -0. If x is 0, the returned value is the smallest representable positive number of the corresponding type. If x is positive infinity, the returned value is positive infinity. If x is negative infinity, the returned value is the largest representable finite negative number of the corresponding type. If x is Nan, the returned value is NaN. The value returned by nextdown(x) is -nextup(-x), and similarly for the other types. RETURN VALUE See DESCRIPTION. VERSIONS These functions were added in glibc 2.24. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │nextup(), nextupf(), nextupl(), nextdown(), │ Thread safety │ MT-Safe │ │nextdownf(), nextdownl() │ │ │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS These functions are described in IEEE Std 754-2008 - Standard for Floating-Point Arithmetic and ISO/IEC TS 18661. SEE ALSO nearbyint(3), nextafter(3) Linux man-pages 6.03 2022-12-15 nextup(3)
Generated by dwww version 1.15 on Thu Jun 27 09:23:40 CEST 2024.