locale/nl_langinfo.3

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  27 .Dd May 3, 2001
  28 .Dt NL_LANGINFO 3
  29 .Os
  30 .Sh NAME
  31 .Nm nl_langinfo ,
  32 .Nm nl_langinfo_l
  33 .Nd language information
  34 .Sh LIBRARY
  35 .Lb libc
  36 .Sh SYNOPSIS
  37 .In langinfo.h
  38 .Ft char *
  39 .Fo nl_langinfo
  40 .Fa "nl_item item"
  41 .Fc
  42 .In langinfo.h
  43 .In xlocale.h
  44 .Ft char *
  45 .Fo nl_langinfo_l
  46 .Fa "nl_item item"
  47 .Fa "locale_t loc"
  48 .Fc
  49 .Sh DESCRIPTION
  50 The
  51 .Fn nl_langinfo
  52 function returns a pointer to a string containing information relevant to
  53 the particular language or cultural area defined in the program's locale.
  54 The manifest constant names and values of
  55 .Fa item
  56 are defined in
  57 .In langinfo.h .
  58 .Pp
  59 Calls to
  60 .Fn setlocale
  61 with a category corresponding to the category of
  62 .Fa item ,
  63 or to the
  64 category
  65 .Dv LC_ALL ,
  66 may overwrite the buffer pointed to by the return value.
  67 .Sh EXAMPLES
  68 For example:
  69 .Pp
  70 .Dl nl_langinfo(ABDAY_1)
  71 .Pp
  72 would return a pointer to the string
  73 .Qq Li Dom
  74 if the identified language was
  75 Portuguese, and
  76 .Qq Li Sun
  77 if the identified language was English.
  78 .Pp
  79 While the
  80 .Fn nl_langinfo
  81 function uses the current locale, the
  82 .Fn nl_langinfo_l
  83 function may be passed a locale directly. See
  84 .Xr xlocale 3
  85 for more information.
  86 .Sh RETURN VALUES
  87 In a locale where langinfo data is not defined,
  88 .Fn nl_langinfo
  89 returns a pointer to the corresponding string in the
  90 .Tn POSIX
  91 locale.
  92 In all locales,
  93 .Fn nl_langinfo
  94 returns a pointer to an empty string if
  95 .Fa item
  96 contains an invalid setting.
  97 .Sh SEE ALSO
  98 .Xr setlocale 3 ,
  99 .Xr xlocale 3
 100 .Sh STANDARDS
 101 The
 102 .Fn nl_langinfo
 103 function conforms to
 104 .St -susv2 .
 105 .Sh HISTORY
 106 The
 107 .Fn nl_langinfo
 108 function first appeared in
 109 .Fx 4.6 .