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-'\" t
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified Sat Jul 24 19:40:39 1993 by Rik Faith (faith@cs.unc.edu)
-.\" Modified Fri Jun 25 12:10:47 1999 by Andries Brouwer (aeb@cwi.nl)
-.\"
-.TH ecvt 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-ecvt, fcvt \- convert a floating-point number to a string
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <stdlib.h>
-.P
-.BI "[[deprecated]] char *ecvt(double " number ", int " ndigits ,
-.BI " int *restrict " decpt ", int *restrict " sign );
-.BI "[[deprecated]] char *fcvt(double " number ", int " ndigits ,
-.BI " int *restrict " decpt ", int *restrict " sign );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR ecvt (),
-.BR fcvt ():
-.nf
- Since glibc 2.17
- (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200809L))
- || /* glibc >= 2.20 */ _DEFAULT_SOURCE
- || /* glibc <= 2.19 */ _SVID_SOURCE
- glibc 2.12 to glibc 2.16:
- (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
- || _SVID_SOURCE
- Before glibc 2.12:
- _SVID_SOURCE || _XOPEN_SOURCE >= 500
-.\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
-.fi
-.SH DESCRIPTION
-The
-.BR ecvt ()
-function converts \fInumber\fP to a null-terminated
-string of \fIndigits\fP digits (where \fIndigits\fP is reduced to a
-system-specific limit determined by the precision of a
-.IR double ),
-and returns a pointer to the string.
-The high-order digit is nonzero, unless
-.I number
-is zero.
-The low order digit is rounded.
-The string itself does not contain a decimal point; however,
-the position of the decimal point relative to the start of the string
-is stored in \fI*decpt\fP.
-A negative value for \fI*decpt\fP means that
-the decimal point is to the left of the start of the string.
-If the sign of
-\fInumber\fP is negative, \fI*sign\fP is set to a nonzero value,
-otherwise it is set to 0.
-If
-.I number
-is zero, it is unspecified whether \fI*decpt\fP is 0 or 1.
-.P
-The
-.BR fcvt ()
-function is identical to
-.BR ecvt (),
-except that
-\fIndigits\fP specifies the number of digits after the decimal point.
-.SH RETURN VALUE
-Both the
-.BR ecvt ()
-and
-.BR fcvt ()
-functions return a pointer to a
-static string containing the ASCII representation of \fInumber\fP.
-The static string is overwritten by each call to
-.BR ecvt ()
-or
-.BR fcvt ().
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR ecvt ()
-T} Thread safety MT-Unsafe race:ecvt
-T{
-.na
-.nh
-.BR fcvt ()
-T} Thread safety MT-Unsafe race:fcvt
-.TE
-.SH STANDARDS
-None.
-.SH HISTORY
-SVr2;
-marked as LEGACY in POSIX.1-2001.
-POSIX.1-2008 removes the specifications of
-.BR ecvt ()
-and
-.BR fcvt (),
-recommending the use of
-.BR sprintf (3)
-instead (though
-.BR snprintf (3)
-may be preferable).
-.SH NOTES
-.\" Linux libc4 and libc5 specified the type of
-.\" .I ndigits
-.\" as
-.\" .IR size_t .
-Not all locales use a point as the radix character ("decimal point").
-.SH SEE ALSO
-.BR ecvt_r (3),
-.BR gcvt (3),
-.BR qecvt (3),
-.BR setlocale (3),
-.BR sprintf (3)