legacy_coding3
Override curses locale encoding checks
Usage
#include <curses.h>
int use_legacy_coding(int level);
Overview
use_legacy_coding, an ncurses extension to the curses library, permits customiztion of unctrl(3X) behavior, suppressing isprint(3)-based checks within the library that would normally cause nonprinting characters to be rendered in visible form. The alteration affects only byte-wide characters with the most significant bit set.
The level parameter controls the result.
0-
The library functions normally, rendering nonprinting characters as described in unctrl(3X),
1-
the library ignores isprint for codes in the range 160-255.
2-
the library ignores isprint for codes in the range 128-255. It also modifies the output of unctrl(3X), showing codes in the range 128-159 as is.
Return value
If the curses screen has not been initialized, or the level parameter is out of range, use_legacy_coding returns ERR. Otherwise, it returns the previous level.
Extensions
use_legacy_coding is an ncurses extension.
Portability
Applications employing ncurses extensions should condition their use on the visibility of the NCURSES_VERSION preprocessor macro.
Releases
46 releases since FreeBSD 6.3-RELEASE; the text changed 10 times.