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 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

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)

Information

Source
Linux kernel
OS/version
GNU
Source updated
March 15, 2016
Page created
February 9, 2018
Page generated
December 2, 2018