term_variables(3X)					    term_variables(3X)

NAME
       SP, acs_map, boolcodes, boolfnames, boolnames, cur_term, numcodes,
       numfnames, numnames, strcodes, strfnames, strnames, ttytype - curses
       terminfo global variables

SYNOPSIS
       #include <curses.h>
       #include <term.h>

       chtype acs_map[];
       NCURSES_CONST char * const * boolcodes;
       NCURSES_CONST char * const * boolfnames;
       NCURSES_CONST char * const * boolnames;
       TERMINAL * cur_term;
       NCURSES_CONST char * const * numcodes;
       NCURSES_CONST char * const * numfnames;
       NCURSES_CONST char * const * numnames;
       NCURSES_CONST char * const * strcodes;
       NCURSES_CONST char * const * strfnames;
       NCURSES_CONST char * const * strnames;
       char ttytype[];

DESCRIPTION
       This  page  summarizes  variables provided by the curses library's low-
       level terminfo interface.  A more complete description is given in  the
       curs_terminfo(3X) manual page.

       Depending  on  the  configuration,  these  may  be actual variables, or
       macros (see curs_threads(3X)) which provide read-only access  to	 curs‐
       es's state.  In either case, applications should treat them as read-on‐
       ly to avoid confusing the library.

   Alternate Character Set Mapping
       After initializing the curses or terminfo interfaces, the acs_map array
       holds  information  used to translate cells with the A_ALTCHARSET video
       attribute into line-drawing characters.

       The encoding of the information in this array has changed periodically.
       Application  developers	need  only know that it is used for the "ACS_"
       constants in <curses.h>.

       The comparable data for the wide-character library is a	private	 vari‐
       able.

   Current Terminal Data
       After initializing the curses or terminfo interfaces, the cur_term con‐
       tains data describing the current terminal.  This variable is also  set
       as a side-effect of set_term(3X) and delscreen(3X).

       It  is possible to save a value of cur_term for subsequent use as a pa‐
       rameter to set_term, for switching between screens.  Alternatively, one
       can  save  the  return  value  from  newterm  or	 setupterm to reuse in
       set_term.

   Terminfo Names
       The tic(1) and infocmp(1) programs use lookup tables for the  long  and
       short  names  of	 terminfo  capabilities,  as well as the corresponding
       names for termcap capabilities.	These are available to other  applica‐
       tions, though the hash-tables are not available.

       The  long  terminfo  capability	names  use a "l" (ell) in their names:
       boolfnames numfnames strfnames

       These are the short names for terminfo  capabilities:  boolnames,  num‐
       names, and strnames.

       These  are the corresponding names used for termcap descriptions: bool‐
       codes, numcodes, and strcodes.

   Terminal Type
       On initialization of  the  curses  or  terminfo	interfaces,  setupterm
       copies the terminal name to the array ttytype.

NOTES
       The  low-level  terminfo	 interface is initialized using setupterm(3X).
       The upper-level curses interface uses the low-level terminfo interface,
       internally.

PORTABILITY
       X/Open Curses does not describe any of these except for cur_term.  (The
       inclusion of cur_term appears to be an oversight, since other  compara‐
       ble low-level information is omitted by X/Open).

       Other  implementations may have comparable variables.  Some implementa‐
       tions provide the variables in their libraries, but omit them from  the
       header files.

SEE ALSO
       curses(3X),  curs_terminfo(3X), curs_threads(3X), terminfo(3X), termin‐
       fo(5).

							    term_variables(3X)

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