Manpages - ecvt_r.3

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);

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

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).

These functions are GNU extensions.

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

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

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