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legacy_coding(3X) Library calls legacy_coding(3X) NAME use_legacy_coding - override curses locale encoding checks SYNOPSIS #include <curses.h> int use_legacy_coding(int level); DESCRIPTION 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 charac- ters 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 char- acters 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 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. PORTABILITY use_legacy_coding is specific to ncurses. It was not supported on Ver- sion 7, BSD or System V implementations. Applications employing ncurses extensions should condition their use on the visibility of the NCURSES_VERSION preprocessor macro. AUTHORS Thomas Dickey (to support lynx(1)'s font-switching feature). SEE ALSO unctrl(3X) ncurses 6.5 2024-04-20 legacy_coding(3X)