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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, an ncurses extension to the curses library, permits cus- tomiztion 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 charac- ters 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. HISTORY ncurses 5.6 (2006) introduced use_legacy_coding to support lynx(1)'s font- switching feature. AUTHORS Thomas Dickey SEE ALSO unctrl(3X) ncurses 6.6 2024-09-14 legacy_coding(3X)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXTENSIONS | PORTABILITY | HISTORY | AUTHORS | SEE ALSO
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