qfcvt_r (3)

#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():

_SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE >= 500

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).

These functions return 0 on success, and -1 otherwise.

These functions are GNU extensions.

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

ecvt(3), qecvt(3), sprintf(3)

This page is part of release 3.74 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 http://www.kernel.org/doc/man-pages/.