Manual Pages  — legacy_coding

 use_legacy_coding - override curses locale encoding checks

SYNOPSIS DESCRIPTION RETURN VALUE PORTABILITY AUTHORS SEE ALSO

#include <curses.h>

int use_legacy_coding(int level);

 use_legacy_coding is an extension to the curses library. It allows the caller to change the result of  unctrl(3X), suppressing  isprint(3)-based checks within the library that would normally cause nonprinting characters to be rendered in visible form. The alteration affects only eight-bit characters.

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.

If the screen has not been initialized, or the level parameter is out of range,  use_legacy_coding returns ERR. Otherwise, it returns the previous level: 0, 1, or 2.

 use_legacy_coding is specific to  ncurses. It was not supported on Version 7, BSD or System V implementations. Applications employing  ncurses extensions should condition their use on the visibility of the  NCURSES_VERSION preprocessor macro.

Thomas Dickey (to support  lynx(1)'s font-switching feature).

 unctrl(3X)