mirror of https://github.com/mkerrisk/man-pages
118 lines
3.2 KiB
Groff
118 lines
3.2 KiB
Groff
.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl>
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.\" This replaces an earlier man page written by Walter Harms
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.\" <walter.harms@informatik.uni-oldenburg.de>.
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.\"
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.\" Corrected return types; from Fabian; 2004-10-05
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.\"
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.TH ECVT_R 3 2021-03-22 "GNU" "Linux Programmer's Manual"
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.SH NAME
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ecvt_r, fcvt_r, qecvt_r, qfcvt_r \- convert a floating-point number to a string
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.SH SYNOPSIS
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.nf
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.B #include <stdlib.h>
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.PP
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.BI "int ecvt_r(double " number ", int " ndigits ", int *restrict " decpt ,
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.BI " int *restrict " sign ", char *restrict " buf ", size_t " len );
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.BI "int fcvt_r(double " number ", int " ndigits ", int *restrict " decpt ,
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.BI " int *restrict " sign ", char *restrict " buf ", size_t " len );
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.PP
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.BI "int qecvt_r(long double " number ", int " ndigits \
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", int *restrict " decpt ,
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.BI " int *restrict " sign ", char *restrict " buf ", size_t " len );
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.BI "int qfcvt_r(long double " number ", int " ndigits \
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", int *restrict " decpt ,
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.BI " int *restrict " sign ", char *restrict " buf ", size_t " len );
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.fi
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.PP
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.RS -4
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.RE
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.PP
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.BR ecvt_r (),
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.BR fcvt_r (),
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.BR qecvt_r (),
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.BR qfcvt_r ():
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.nf
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/* Glibc since 2.19: */ _DEFAULT_SOURCE
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|| /* Glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
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.fi
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.SH DESCRIPTION
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The functions
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.BR ecvt_r (),
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.BR fcvt_r (),
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.BR qecvt_r (),
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and
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.BR qfcvt_r ()
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are identical to
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.BR ecvt (3),
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.BR fcvt (3),
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.BR qecvt (3),
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and
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.BR qfcvt (3),
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respectively, except that they do not return their result in a static
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buffer, but instead use the supplied
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.I buf
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of size
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.IR len .
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See
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.BR ecvt (3)
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and
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.BR qecvt (3).
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.SH RETURN VALUE
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These functions return 0 on success, and \-1 otherwise.
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.SH ATTRIBUTES
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For an explanation of the terms used in this section, see
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.BR attributes (7).
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.ad l
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.nh
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.TS
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allbox;
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lbx lb lb
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l l l.
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Interface Attribute Value
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T{
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.BR ecvt_r (),
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.BR fcvt_r (),
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.BR qecvt_r (),
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.BR qfcvt_r ()
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T} Thread safety MT-Safe
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.TE
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.hy
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.ad
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.sp 1
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.SH CONFORMING TO
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These functions are GNU extensions.
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.SH NOTES
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These functions are obsolete.
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Instead,
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.BR sprintf (3)
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is recommended.
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.SH SEE ALSO
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.BR ecvt (3),
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.BR qecvt (3),
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.BR sprintf (3)
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