ecvt_r(3)                  Library Functions Manual                  ecvt_r(3)

NAME
       ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-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 len);
       [[deprecated]] int fcvt_r(double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);

       [[deprecated]] int qecvt_r(long double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);
       [[deprecated]] int qfcvt_r(long double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);

   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 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 |
       |()                                          |               |         |
       +--------------------------------------------+---------------+---------+
STANDARDS
       GNU.

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

SEE ALSO
       ecvt(3), qecvt(3), sprintf(3)

Linux man-pages 6.7               2023-10-31                         ecvt_r(3)