qecvt(3) Library Functions Manual qecvt(3)
NAME
qecvt, qfcvt, qgcvt - convert a floating-point number to a string
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
[[deprecated]] char *qecvt(long double number, int ndigits,
int *restrict decpt, int *restrict sign);
[[deprecated]] char *qfcvt(long double number, int ndigits,
int *restrict decpt, int *restrict sign);
[[deprecated]] 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 at-
tributes(7).
┌───────────────────────────────┬───────────────┬──────────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼──────────────────────┤
│qecvt() │ Thread safety │ MT-Unsafe race:qecvt │
├───────────────────────────────┼───────────────┼──────────────────────┤
│qfcvt() │ Thread safety │ MT-Unsafe race:qfcvt │
├───────────────────────────────┼───────────────┼──────────────────────┤
│qgcvt() │ Thread safety │ MT-Safe │
└───────────────────────────────┴───────────────┴──────────────────────┘
STANDARDS
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)
Linux man-pages 6.03 2022-12-15 qecvt(3)
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