man3/wctob.3

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  10 .\" References consulted:
  11 .\"   GNU glibc-2 source code and manual
  12 .\"   Dinkumware C library reference http://www.dinkumware.com/
  13 .\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
  14 .\"   ISO/IEC 9899:1999
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  16 .TH WCTOB 3 2015-08-08 "GNU" "Linux Programmer's Manual"
  17 .SH NAME
  18 wctob \- try to represent a wide character as a single byte
  19 .SH SYNOPSIS
  20 .nf
  21 .B #include <wchar.h>
  22 .sp
  23 .BI "int wctob(wint_t " c );
  24 .fi
  25 .SH DESCRIPTION
  26 The
  27 .BR wctob ()
  28 function tests whether
  29 the multibyte representation of the
  30 wide character
  31 .IR c ,
  32 starting in the initial state, consists of a single
  33 byte.
  34 If so, it is returned as an
  35 .IR "unsigned char" .
  36 .PP
  37 Never use this function.
  38 It cannot help you in writing internationalized
  39 programs.
  40 Internationalized programs must never distinguish single-byte and
  41 multibyte characters.
  42 .SH RETURN VALUE
  43 The
  44 .BR wctob ()
  45 function returns the single-byte representation of
  46 .IR c ,
  47 if it exists, of
  48 .B EOF
  49 otherwise.
  50 .SH ATTRIBUTES
  51 For an explanation of the terms used in this section, see
  52 .BR attributes (7).
  53 .TS
  54 allbox;
  55 lb lb lb
  56 l l l.
  57 Interface       Attribute       Value
  58 T{
  59 .BR wctob ()
  60 T}      Thread safety   MT-Safe
  61 .TE
  62
  63 .SH CONFORMING TO
  64 POSIX.1-2001, POSIX.1-2008, C99.
  65 .SH NOTES
  66 The behavior of
  67 .BR wctob ()
  68 depends on the
  69 .B LC_CTYPE
  70 category of the
  71 current locale.
  72 .PP
  73 This function should never be used.
  74 Internationalized programs must never
  75 distinguish single-byte and multibyte characters.
  76 Use either
  77 .BR wctomb (3)
  78 or the thread-safe
  79 .BR wcrtomb (3)
  80 instead.
  81 .SH SEE ALSO
  82 .BR btowc (3),
  83 .BR wcrtomb (3),
  84 .BR wctomb (3)