1curs_getcchar(3X)                                            curs_getcchar(3X)
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NAME

6       getcchar,  setcchar  - Get a wide character string and rendition from a
7       cchar_t or set a cchar_t from a wide-character string
8

SYNOPSIS

10       #include <curses.h>
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12       int getcchar(
13               const cchar_t *wcval,
14               wchar_t *wch,
15               attr_t *attrs,
16               short *color_pair,
17               void *opts );
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19       int setcchar(
20               cchar_t *wcval,
21               const wchar_t *wch,
22               const attr_t attrs,
23               short color_pair,
24               void *opts );
25

DESCRIPTION

27   getcchar
28       The getcchar function gets a wide-character string and rendition from a
29       cchar_t  argument.   When wch is not a null pointer, the getcchar func‐
30       tion does the following:
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32       ·   Extracts information from a cchar_t value wcval
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34       ·   Stores the character attributes in the location pointed to by attrs
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36       ·   Stores the color-pair in the location pointed to by color_pair
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38       ·   Stores the wide-character string, characters referenced  by  wcval,
39           into the array pointed to by wch.
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41       When wch is a null pointer, the getcchar function does the following:
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43       ·   Obtains the number of wide characters pointed to by wcval
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45       ·   Does not change the data referenced by attrs or color_pair
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47   setcchar
48       The  setcchar  function initializes the location pointed to by wcval by
49       using:
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51       ·   The character attributes in attrs
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53       ·   The color pair in color_pair
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55       ·   The wide-character string pointed to by wch.  The  string  must  be
56           L'\0' terminated, contain at most one spacing character, which must
57           be the first.
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59           Up to CCHARW_MAX-1 nonspacing characters  may  follow.   Additional
60           nonspacing characters are ignored.
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62           The string may contain a single control character instead.  In that
63           case, no nonspacing characters are allowed.
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EXTENSIONS

66       X/Open Curses documents the opts argument as reserved for  future  use,
67       saying  that  it must be null.  This implementation uses that parameter
68       in ABI 6 for the functions which have a color-pair parameter to support
69       extended color pairs:
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71       ·   For   functions  which modify the color, e.g., setcchar, if opts is
72           set it is treated as a pointer to int, and used to  set  the  color
73           pair instead of the short pair parameter.
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75       ·   For  functions which retrieve the color, e.g., getcchar, if opts is
76           set it is treated as a pointer to int, and  used  to  retrieve  the
77           color pair as an int value, in addition retrieving it via the stan‐
78           dard pointer to short parameter.
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NOTES

81       The wcval argument may be a value generated by a call to setcchar or by
82       a function that has a cchar_t output argument.  If wcval is constructed
83       by any other means, the effect is unspecified.
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RETURN VALUE

86       When wch is a null pointer, getcchar returns the number of wide charac‐
87       ters referenced by wcval, including one for a trailing null.
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89       When  wch  is  not  a null pointer, getcchar returns OK upon successful
90       completion, and ERR otherwise.
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92       Upon successful completion, setcchar returns OK.  Otherwise, it returns
93       ERR.
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SEE ALSO

96       Functions: curs_attr(3X), curs_color(3X), curses(3X), wcwidth(3).
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100                                                             curs_getcchar(3X)
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