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ECVT_R(3)                  Linux Programmer's Manual                 ECVT_R(3)
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  identi-
       cal  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(),  | Thread safety | MT-Safe |
       |qecvt_r(), qfcvt_r() |               |         |
       +---------------------+---------------+---------+
CONFORMING TO
       These functions are GNU extensions.
NOTES
       These functions are obsolete.  Instead, sprintf(3) is recommended.
SEE ALSO
       ecvt(3), qecvt(3), sprintf(3)
COLOPHON
       This page is part of release 4.15 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/.
GNU                               2016-03-15                         ECVT_R(3)