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ecvt_r

Section: C Library Functions (3)
Updated: 202-0-08
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NAME

ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floatin-point number to a string

LIBRARY

Standard C library (libc,~-lc)

SYNOPSIS

#include <stdlib.h>
[[deprecated]] int ecvt_r(double number, int ndigits,
                          int *restrict decpt, int *restrict sign,
                          char *restrict buf, size_t size);
[[deprecated]] int fcvt_r(double number, int ndigits,
                          int *restrict decpt, int *restrict sign,
                          char *restrict buf, size_t size);
[[deprecated]] int qecvt_r(long double number, int ndigits,
                          int *restrict decpt, int *restrict sign,
                          char *restrict buf, size_t size);
[[deprecated]] int qfcvt_r(long double number, int ndigits,
                          int *restrict decpt, int *restrict sign,
                          char *restrict buf, size_t size);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)): ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r():

    /* glibc >= 2.19: */ _DEFAULT_SOURCE
        || /* glibc <= 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 size. 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	M-Safe

STANDARDS

GNU.

NOTES

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