ecvt_r(3) — Linux manual page

ecvt_r(3)               Library Functions Manual               ecvt_r(3)

NAME

       ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-point
       number to a string

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <stdlib.h>

       [[deprecated]] int ecvt_r(double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);
       [[deprecated]] int fcvt_r(double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);

       [[deprecated]] int qecvt_r(long double number, int ndigits,
                                 int *restrict decpt, int *restrict sign,
                                 char *restrict buf, size_t len);
       [[deprecated]] 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 >= 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 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(), qecvt_r(),      │ Thread safety │ MT-Safe │
       │ qfcvt_r()                           │               │         │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       GNU.

NOTES

       These functions are obsolete.  Instead, sprintf(3) is
       recommended.

SEE ALSO

       ecvt(3), qecvt(3), sprintf(3)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                      ecvt_r(3)

Pages that refer to this page: ecvt(3), qecvt(3)

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