term_variables(3x) term_variables(3x)
SP, acs_map, boolcodes, boolfnames, boolnames, cur_term,
numcodes, numfnames, numnames, strcodes, strfnames,
strnames, ttytype - curses terminfo global variables
#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;
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.
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.
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.
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.
On initialization of the curses or terminfo interfaces,
setupterm(3x) copies the terminal name to the array tty-
type.
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.
The low-level terminfo interface is initialized using
setupterm(3x). The upper-level curses interface uses the
low-level terminfo interface, internally.
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.
curses(3x), curs_terminfo(3x), curs_threads(3x),
terminfo(5).
term_variables(3x)