qfcvt_r (3) - Linux Manuals

qfcvt_r: convert a floating-point number to a string

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
ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r()	Thread safety	MT-Safe

CONFORMING TO

These functions are GNU extensions.

NOTES

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

COLOPHON

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