1legacy_coding(3X)                                            legacy_coding(3X)
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NAME

6       use_legacy_coding - use terminal's default colors
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SYNOPSIS

9       #include <curses.h>
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11       int use_legacy_coding(int level);
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DESCRIPTION

14       The use_legacy_coding() function is an extension to the curses library.
15       It allows the caller to change  the  result  of  unctrl,  and  suppress
16       related checks within the library that would normally cause nonprinting
17       characters to be rendered in visible form.   This  affects  only  8-bit
18       characters.
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20       The level parameter controls the result:
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22              0    the library functions normally, rendering nonprinting char‐
23                   acters as described in unctrl.
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25              1    the  library  ignores  isprintf  for  codes  in  the  range
26                   160-255.
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28              2    the  library  ignores  isprintf  for  codes  in  the  range
29                   128-255.  It also modifies the output  of  unctrl,  showing
30                   codes in the range 128-159 as is.
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RETURN VALUE

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

38       This  routine  is specific to ncurses.  It was not supported on Version
39       7, BSD or System V implementations.  It is recommended  that  any  code
40       depending on ncurses extensions be conditioned using NCURSES_VERSION.
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SEE ALSO

43       unctrl.
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AUTHOR

46       Thomas Dickey (to support lynx's font-switching feature).
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50                                                             legacy_coding(3X)