ecvt_r3
Convert a floating-point number to a string
Usage
#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
Library
Standard C library (libc, -lc)
Overview
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 | MT-Safe |
Notes
These functions are obsolete. Instead, sprintf(3) is recommended.
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.