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term_variables 3x

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[];

       SCREEN * SP;

       TERMINAL * cur_term;

       char ttytype[];

       NCURSES_CONST char * const * boolcodes;
       NCURSES_CONST char * const * boolfnames;
       NCURSES_CONST char * const * boolnames;

       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;


DESCRIPTION

       This  page summarizes variables provided by the curses li-
       brary's low-level terminfo interface.  A more complete de-
       scription is given in the curs_terminfo(3x) manual page.

       Depending  on the configuration, these may be actual vari-
       ables, or  macros  (see  curs_threads(3x))  which  provide
       read-only  access  to curses's state.  In either case, ap-
       plications should treat them as read-only to avoid confus-
       ing 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 variable.


Current Terminal Data

       After  initializing the curses or terminfo interfaces, the
       cur_term contains 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  parameter  to  set_term, for switching between
       screens.  Alternatively, one can  save  the  return  value
       from newterm or setupterm(3x) 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  applications,  although  the
       hash-tables used by the terminfo and termcap functions are
       not available.

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

       These are the short names for terminfo capabilities: bool-
       names, numnames, and strnames.

       These are the corresponding names  used  for  termcap  de-
       scriptions: boolcodes, numcodes, and strcodes.


Terminal Type

       On  initialization  of  the curses or terminfo interfaces,
       setupterm(3x) copies the terminal name to the  array  tty-
       type.


Terminfo Names

       In addition to the variables, <term.h> also defines a sym-
       bol for each terminfo capability long name.  These are  in
       terms of the symbol CUR, which is defined

       #define CUR cur_term->type.

       These symbols provide a faster method of accessing termin-
       fo capabilities than using tigetstr(3x), etc.


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 comparable low-level information is
       omitted by X/Open).

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

       All  implementations which provide terminfo interfaces add
       definitions as described in the  Terminfo  Names  section.
       Most,  but  not all, base the definition upon the cur_term
       variable.


SEE ALSO

       curses(3x),      curs_terminfo(3x),      curs_threads(3x),
       terminfo(5).



                                                     term_variables(3x)