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ECVT_R(3)                                                               Linux Programmer's Manual                                                              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 *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);

   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 <= 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 re‐
       turn 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)

GNU                                                                            2021-03-22                                                                      ECVT_R(3)

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