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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
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ECVT_R(3) Linux Programmer's Manual ECVT_R(3)
ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-point number to
a string
#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
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.
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() │ │ │
└─────────────────────┴───────────────┴─────────┘
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 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)
Pages that refer to this page: ecvt(3), qecvt(3)
Copyright and license for this manual page
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