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 *restrict decpt,
int *restrict sign, char *restrict buf, size_t len);
int fcvt_r(double number, int ndigits, int *restrict decpt,
int *restrict sign, char *restrict buf, size_t len);
int qecvt_r(long double number, int ndigits, int *restrict decpt,
int *restrict sign, char *restrict buf, size_t len);
int qfcvt_r(long double number, int ndigits, int *restrict decpt,
int *restrict sign, char *restrict buf, size_t len);
ecvt_r(), fcvt_r(), qecvt_r(),
qfcvt_r():
/* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc <= 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 (), qecvt_r (), qfcvt_r () |
Thread safety |
MT-Safe |
These functions are GNU extensions.
These functions are obsolete. Instead, sprintf(3) is recommended.
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