1ECVT_R(3)                  Linux Programmer's Manual                 ECVT_R(3)
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NAME

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

10       #include <stdlib.h>
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12       int ecvt_r(double number, int ndigits, int *restrict decpt,
13                  int *restrict sign, char *restrict buf, size_t len);
14       int fcvt_r(double number, int ndigits, int *restrict decpt,
15                  int *restrict sign, char *restrict buf, size_t len);
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17       int qecvt_r(long double number, int ndigits, int *restrict decpt,
18                  int *restrict sign, char *restrict buf, size_t len);
19       int qfcvt_r(long double number, int ndigits, int *restrict decpt,
20                  int *restrict sign, char *restrict buf, size_t len);
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22   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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24       ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r():
25           /* Glibc since 2.19: */ _DEFAULT_SOURCE
26               || /* Glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
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DESCRIPTION

29       The functions ecvt_r(), fcvt_r(), qecvt_r(), and qfcvt_r() are  identi‐
30       cal  to  ecvt(3), fcvt(3), qecvt(3), and qfcvt(3), respectively, except
31       that they do not return their result in a static  buffer,  but  instead
32       use the supplied buf of size len.  See ecvt(3) and qecvt(3).
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RETURN VALUE

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

38       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
39       tributes(7).
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41       ┌────────────────────────────────────────────┬───────────────┬─────────┐
42       │Interface                                   │ Attribute     │ Value   │
43       ├────────────────────────────────────────────┼───────────────┼─────────┤
44       │ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r()    │ Thread safety │ MT-Safe │
45       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

48       These functions are GNU extensions.
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NOTES

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

54       ecvt(3), qecvt(3), sprintf(3)
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COLOPHON

57       This page is part of release 5.13 of the Linux  man-pages  project.   A
58       description  of  the project, information about reporting bugs, and the
59       latest    version    of    this    page,    can     be     found     at
60       https://www.kernel.org/doc/man-pages/.
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64GNU                               2021-03-22                         ECVT_R(3)
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