ECVT_R(3) Linux Programmer's Manual ECVT_R(3)NAME
ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-point number to a
string
SYNOPSIS
#include <stdlib.h>
int ecvt_r(double number, int ndigits, int *decpt,
int *sign, char *buf, size_t len);
int fcvt_r(double number, int ndigits, int *decpt,
int *sign, char *buf, size_t len);
int qecvt_r(long double number, int ndigits, int *decpt,
int *sign, char *buf, size_t len);
int qfcvt_r(long double number, int ndigits, int *decpt,
int *sign, char *buf, size_t len);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r():
/* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
DESCRIPTION
The functions ecvt_r(), fcvt_r(), qecvt_r(), and qfcvt_r() are identi‐
cal to ecvt(3), fcvt(3), qecvt(3), and qfcvt(3), respectively, except
that they do not return their result in a static buffer, but instead
use the supplied buf of size len. See ecvt(3) and qecvt(3).
RETURN VALUE
These functions return 0 on success, and -1 otherwise.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├─────────────────────┼───────────────┼─────────┤
│ecvt_r(), fcvt_r(), │ Thread safety │ MT-Safe │
│qecvt_r(), qfcvt_r() │ │ │
└─────────────────────┴───────────────┴─────────┘
CONFORMING TO
These functions are GNU extensions.
NOTES
These functions are obsolete. Instead, sprintf(3) is recommended.
SEE ALSOecvt(3), qecvt(3), sprintf(3)COLOPHON
This page is part of release 4.14 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2016-03-15 ECVT_R(3)
