qfcvt_r(3)

1ecvt_r(3)                  Library Functions 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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LIBRARY

10       Standard C library (libc, -lc)
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SYNOPSIS

13       #include <stdlib.h>
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15       [[deprecated]] int ecvt_r(double number, int ndigits,
16                                 int *restrict decpt, int *restrict sign,
17                                 char *restrict buf, size_t len);
18       [[deprecated]] int fcvt_r(double number, int ndigits,
19                                 int *restrict decpt, int *restrict sign,
20                                 char *restrict buf, size_t len);
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22       [[deprecated]] int qecvt_r(long double number, int ndigits,
23                                 int *restrict decpt, int *restrict sign,
24                                 char *restrict buf, size_t len);
25       [[deprecated]] int qfcvt_r(long double number, int ndigits,
26                                 int *restrict decpt, int *restrict sign,
27                                 char *restrict buf, size_t len);
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29   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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31       ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r():
32           /* glibc >= 2.19: */ _DEFAULT_SOURCE
33               || /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
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DESCRIPTION

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

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

45       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
46       tributes(7).
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48       ┌────────────────────────────────────────────┬───────────────┬─────────┐
49       │Interface                                   │ Attribute     │ Value   │
50       ├────────────────────────────────────────────┼───────────────┼─────────┤
51       │ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r()    │ Thread safety │ MT-Safe │
52       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

55       GNU.
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NOTES

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