From fc22b3d6507c6745911b9dfcc68f1e665ae13dbc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 21:43:11 +0200 Subject: Adding upstream version 4.22.0. Signed-off-by: Daniel Baumann --- upstream/debian-bookworm/man3/nan.3 | 97 +++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 upstream/debian-bookworm/man3/nan.3 (limited to 'upstream/debian-bookworm/man3/nan.3') diff --git a/upstream/debian-bookworm/man3/nan.3 b/upstream/debian-bookworm/man3/nan.3 new file mode 100644 index 00000000..bb941a8b --- /dev/null +++ b/upstream/debian-bookworm/man3/nan.3 @@ -0,0 +1,97 @@ +'\" t +.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) +.\" +.\" SPDX-License-Identifier: GPL-1.0-or-later +.\" +.\" Based on glibc infopages +.\" +.\" Corrections by aeb +.\" +.TH nan 3 2022-12-15 "Linux man-pages 6.03" +.SH NAME +nan, nanf, nanl \- return 'Not a Number' +.SH LIBRARY +Math library +.RI ( libm ", " \-lm ) +.SH SYNOPSIS +.nf +.B #include +.PP +.BI "double nan(const char *" tagp ); +.BI "float nanf(const char *" tagp ); +.BI "long double nanl(const char *" tagp ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR nan (), +.BR nanf (), +.BR nanl (): +.nf + _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L +.fi +.SH DESCRIPTION +These functions return a representation (determined by +.IR tagp ) +of a quiet NaN. +If the implementation does not support +quiet NaNs, these functions return zero. +.PP +The call +.I nan("char\-sequence") +is equivalent to: +.PP +.in +4n +.EX +strtod("NAN(char\-sequence)", NULL); +.EE +.in +.PP +Similarly, calls to +.BR nanf () +and +.BR nanl () +are equivalent to analogous calls to +.BR strtof (3) +and +.BR strtold (3). +.PP +The argument +.I tagp +is used in an unspecified manner. +On IEEE 754 systems, there are many representations of NaN, and +.I tagp +selects one. +On other systems it may do nothing. +.SH VERSIONS +These functions were added in glibc 2.1. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.ad l +.nh +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.BR nan (), +.BR nanf (), +.BR nanl () +T} Thread safety MT-Safe locale +.TE +.hy +.ad +.sp 1 +.SH STANDARDS +C99, POSIX.1-2001, POSIX.1-2008. +See also IEC 559 and the appendix with +recommended functions in IEEE 754/IEEE 854. +.SH SEE ALSO +.BR isnan (3), +.BR strtod (3), +.BR math_error (7) -- cgit v1.2.3