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GNU
2016-03-15
Aliases: fcvt_r(3), fcvt_r(3), fcvt_r(3), fcvt_r(3), fcvt_r(3), fcvt_r(3), fcvt_r(3), fcvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qecvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3), qfcvt_r(3)

manpages-dev

Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

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 identical 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

Thread safety MT-Safe

CONFORMING TO

These functions are GNU extensions.

NOTES

These functions are obsolete. Instead, sprintf(3) is recommended.

COLOPHON

This page is part of release 5.00 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/.

REFERENCED BY

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