man3/qecvt.3

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  25 .\" This replaces an earlier man page written by Walter Harms
  26 .\" <walter.harms@informatik.uni-oldenburg.de>.
  27 .\"
  28 .TH QECVT 3  2016-03-15 "GNU" "Linux Programmer's Manual"
  29 .SH NAME
  30 qecvt, qfcvt, qgcvt \- convert a floating-point number to a string
  31 .SH SYNOPSIS
  32 .B #include <stdlib.h>
  33 .PP
  34 .BI "char *qecvt(long double " number ", int " ndigits ", int *" decpt ,
  35 .BI "int *" sign );
  36 .PP
  37 .BI "char *qfcvt(long double " number ", int " ndigits ", int *" decpt ,
  38 .BI "int *" sign );
  39 .PP
  40 .BI "char *qgcvt(long double " number ", int " ndigit ", char *" buf );
  41 .PP
  42 .in -4n
  43 Feature Test Macro Requirements for glibc (see
  44 .BR feature_test_macros (7)):
  45 .in
  46 .PP
  47 .ad l
  48 .BR qecvt (),
  49 .BR qfcvt (),
  50 .BR qgcvt ():
  51 _SVID_SOURCE
  52 .ad b
  53 .\" FIXME . The full FTM picture looks to have be something like the
  54 .\" following mess:
  55 .\"    glibc 2.20 onward
  56 .\"        _DEFAULT_SOURCE
  57 .\"    glibc 2.18 to glibc 2.19
  58 .\"        _BSD_SOURCE || _SVID_SOURCE
  59 .\"    glibc 2.10 to glibc 2.17
  60 .\"        _SVID_SOURCE || (_XOPEN_SOURCE >= 500 ||
  61 .\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&
  62 .\"                ! (_POSIX_C_SOURCE >= 200809L))
  63 .\"    Before glibc 2.10:
  64 .\"        _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
  65 .\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED)
  66 .SH DESCRIPTION
  67 The functions
  68 .BR qecvt (),
  69 .BR qfcvt (),
  70 and
  71 .BR qgcvt ()
  72 are identical to
  73 .BR ecvt (3),
  74 .BR fcvt (3),
  75 and
  76 .BR gcvt (3)
  77 respectively, except that they use a
  78 .I "long double"
  79 argument
  80 .IR number .
  81 See
  82 .BR ecvt (3)
  83 and
  84 .BR gcvt (3).
  85 .SH ATTRIBUTES
  86 For an explanation of the terms used in this section, see
  87 .BR attributes (7).
  88 .TS
  89 allbox;
  90 lb lb lb
  91 l l l.
  92 Interface       Attribute       Value
  93 T{
  94 .BR qecvt ()
  95 T}      Thread safety   MT-Unsafe race:qecvt
  96 T{
  97 .BR qfcvt ()
  98 T}      Thread safety   MT-Unsafe race:qfcvt
  99 T{
 100 .BR qgcvt ()
 101 T}      Thread safety   MT-Safe
 102 .TE
 103 .SH CONFORMING TO
 104 SVr4.
 105 Not seen in most common UNIX implementations,
 106 but occurs in SunOS.
 107 .\" Not supported by libc4 and libc5.
 108 Supported by glibc.
 109 .SH NOTES
 110 These functions are obsolete.
 111 Instead,
 112 .BR snprintf (3)
 113 is recommended.
 114 .SH SEE ALSO
 115 .BR ecvt (3),
 116 .BR ecvt_r (3),
 117 .BR gcvt (3),
 118 .BR sprintf (3)