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   qfcvt_r    ( 3 )

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Имя (Name)

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

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Синопсис (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

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Описание (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).

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Возвращаемое значение (Return value)

These functions return 0 on success, and -1 otherwise.

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Атрибуты (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()                             │               │         │
       └──────────────────────────────────────┴───────────────┴─────────┘

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Стандарты (Conforming to)

These functions are GNU extensions.

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Примечание (Note)

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

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Смотри также (See also)

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

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