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QECVT(3) Linux Programmer's Manual QECVT(3)
NAME
qecvt, qfcvt, qgcvt - convert a floating-point number to a string
SYNOPSIS
#include <stdlib.h>
char *qecvt(long double number, int ndigits, int *restrict decpt,
int *restrict sign);
char *qfcvt(long double number, int ndigits, int *restrict decpt,
int *restrict sign);
char *qgcvt(long double number, int ndigit, char *buf);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
qecvt(), qfcvt(), qgcvt():
Since glibc 2.19:
_DEFAULT_SOURCE
In glibc up to and including 2.19:
_SVID_SOURCE
DESCRIPTION
The functions qecvt(), qfcvt(), and qgcvt() are identical to ecvt(3), fcvt(3), and gcvt(3) respectively, except that they use a long double argument number. See
ecvt(3) and gcvt(3).
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬──────────────────────┐
│Interface │ Attribute │ Value │
├─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼──────────────────────┤
│qecvt() │ Thread safety │ MT-Unsafe race:qecvt │
├─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼──────────────────────┤
│qfcvt() │ Thread safety │ MT-Unsafe race:qfcvt │
├─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼──────────────────────┤
│qgcvt() │ Thread safety │ MT-Safe │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴──────────────────────┘
CONFORMING TO
SVr4. Not seen in most common UNIX implementations, but occurs in SunOS. Supported by glibc.
NOTES
These functions are obsolete. Instead, snprintf(3) is recommended.
SEE ALSO
ecvt(3), ecvt_r(3), gcvt(3), sprintf(3)
GNU 2021-03-22 QECVT(3)