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 *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

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 return 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(),  │ Thread safety │ MT-Safe │
       │qecvt_r(), qfcvt_r() │               │         │
       └─────────────────────┴───────────────┴─────────┘

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)

COLOPHON

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