fcvt_r(3) Linux Man Page - System Grab Bag

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). allbox; lbx lb lb T{ ecvt_r()fcvt_r()qecvt_r()qfcvt_r()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

Standards

GNU.

Notes

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