getcchar, setcchar - Get a wide character string and rendition from a cchar_t or set a cchar_t from a wide-character string
#include <curses.h> int getcchar( const cchar_t *wcval, wchar_t *wch, attr_t *attrs, short *color_pair, void *opts ); int setcchar( cchar_t *wcval, const wchar_t *wch, const attr_t attrs, short color_pair, void *opts );
The getcchar function gets a wide-character string and rendition from a cchar_t argument. When wch is not a null pointer, the getcchar func- tion does the following: o Extracts information from a cchar_t value wcval o Stores the character attributes in the location pointed to by attrs o Stores the color-pair in the location pointed to by color_pair o Stores the wide-character string, characters referenced by wcval, into the array pointed to by wch. When wch is a null pointer, the getcchar function does the following: o Obtains the number of wide characters pointed to by wcval o Does not change the data referenced by attrs or color_pair
The setcchar function initializes the location pointed to by wcval by using: o The character attributes in attrs o The color pair in color_pair o The wide-character string pointed to by wch. The string must be L'\0' terminated, contain at most one spacing character, which must be the first. Up to CCHARW_MAX-1 nonspacing characters may follow. Additional nonspacing characters are ignored. The string may contain a single control character instead. In that case, no nonspacing characters are allowed.
X/Open Curses documents the opts argument as reserved for future use, saying that it must be null. This implementation uses that parameter in ABI 6 for the functions which have a color-pair parameter to support extended color pairs: o For functions which modify the color, e.g., setcchar, if opts is set it is treated as a pointer to int, and used to set the color pair instead of the short pair parameter. o For functions which retrieve the color, e.g., getcchar, if opts is set it is treated as a pointer to int, and used to retrieve the color pair as an int value, in addition retrieving it via the stan- dard pointer to short parameter.
The wcval argument may be a value generated by a call to setcchar or by a function that has a cchar_t output argument. If wcval is constructed by any other means, the effect is unspecified.
When wch is a null pointer, getcchar returns the number of wide charac- ters referenced by wcval, including one for a trailing null. When wch is not a null pointer, getcchar returns OK upon successful completion, and ERR otherwise. Upon successful completion, setcchar returns OK. Otherwise, it returns ERR.
Functions: curs_attr(3x), curs_color(3x), curses(3x), wcwidth(3). curs_getcchar(3x)