ecvt_r - Man Page

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).

InterfaceAttributeValue
ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r()Thread safetyMT-Safe

Standards

These functions are GNU extensions.

Notes

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

See Also

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

Referenced By

ecvt(3), qecvt(3).

The man pages fcvt_r(3), qecvt_r(3) and qfcvt_r(3) are aliases of ecvt_r(3).

2022-12-15 Linux man-pages 6.02