prctl.2: Clarify the unsupported hardware case of EINVAL

[thirdparty/man-pages.git] / man3 / qecvt.3

.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl>
.\"
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.\" This replaces an earlier man page written by Walter Harms
.\" <walter.harms@informatik.uni-oldenburg.de>.
.\"
.TH QECVT 3  2016-03-15 "GNU" "Linux Programmer's Manual"
.SH NAME
qecvt, qfcvt, qgcvt \- convert a floating-point number to a string
.SH SYNOPSIS
.B #include <stdlib.h>
.PP
.BI "char *qecvt(long double " number ", int " ndigits ", int *" decpt ,
.BI "int *" sign );
.PP
.BI "char *qfcvt(long double " number ", int " ndigits ", int *" decpt ,
.BI "int *" sign );
.PP
.BI "char *qgcvt(long double " number ", int " ndigit ", char *" buf );
.PP
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.PP
.ad l
.BR qecvt (),
.BR qfcvt (),
.BR qgcvt ():
_SVID_SOURCE
.ad b
.\" FIXME . The full FTM picture looks to have be something like the
.\" following mess:
.\"    glibc 2.20 onward
.\"        _DEFAULT_SOURCE
.\"    glibc 2.18 to glibc 2.19
.\"        _BSD_SOURCE || _SVID_SOURCE
.\"    glibc 2.10 to glibc 2.17
.\"        _SVID_SOURCE || (_XOPEN_SOURCE >= 500 ||
.\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&
.\"                ! (_POSIX_C_SOURCE >= 200809L))
.\"    Before glibc 2.10:
.\"        _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
.\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED)
.SH DESCRIPTION
The functions
.BR qecvt (),
.BR qfcvt (),
and
.BR qgcvt ()
are identical to
.BR ecvt (3),
.BR fcvt (3),
and
.BR gcvt (3)
respectively, except that they use a
.I "long double"
argument
.IR number .
See
.BR ecvt (3)
and
.BR gcvt (3).
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR qecvt ()
T}	Thread safety	MT-Unsafe race:qecvt
T{
.BR qfcvt ()
T}	Thread safety	MT-Unsafe race:qfcvt
T{
.BR qgcvt ()
T}	Thread safety	MT-Safe
.TE
.SH CONFORMING TO
SVr4.
Not seen in most common UNIX implementations,
but occurs in SunOS.
.\" Not supported by libc4 and libc5.
Supported by glibc.
.SH NOTES
These functions are obsolete.
Instead,
.BR snprintf (3)
is recommended.
.SH SEE ALSO
.BR ecvt (3),
.BR ecvt_r (3),
.BR gcvt (3),
.BR sprintf (3)