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legacy_coding(3) Library calls legacy_coding(3) NAME use_legacy_coding - override locale-encoding checks SYNOPSIS #include <curses.h> int use_legacy_coding(int level); DESCRIPTION The use_legacy_coding function is an extension to the curses library. It allows the caller to change the result of unctrl, and suppress re- lated checks within the library that would normally cause nonprinting characters to be rendered in visible form. This affects only 8-bit characters. The level parameter controls the result: 0 the library functions normally, rendering nonprinting char- acters as described in unctrl. 1 the library ignores isprintf for codes in the range 160-255. 2 the library ignores isprintf for codes in the range 128-255. It also modifies the output of unctrl, showing codes in the range 128-159 as is. RETURN VALUE If the screen has not been initialized, or the level parameter is out of range, the function returns ERR. Otherwise, it returns the previous level: 0, 1 or 2. PORTABILITY This routine is specific to ncurses. It was not supported on Version 7, BSD or System V implementations. It is recommended that any code depending on ncurses extensions be conditioned using NCURSES_VERSION. SEE ALSO unctrl(3). AUTHOR Thomas Dickey (to support lynx's font-switching feature). ncurses 6.4 2022-02-12 legacy_coding(3)