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 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 threads(3NCURSES)) which provide read-only access to curses’s state. In either case, applications should treat them as read-only 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 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: boolnames, numnames, and strnames.
These are the corresponding names used for termcap descriptions: boolcodes, numcodes, and strcodes.
Terminal
Type
A terminal description begins with one or more terminal
names separated by “|” (vertical bars). On
initialization of the curses or terminfo interfaces,
setupterm(3X) copies the terminal names to the array
ttytype.
Terminfo
Names
In addition to the variables, <term.h> also
defines a symbol for each terminfo capability long
name. These are in terms of the symbol CUR, which
is defined
#define CUR ((TERMTYPE *)(cur_term))->
These symbols provide a faster method of accessing terminfo capabilities than using tigetstr(3X), etc.
The actual definition of CUR depends upon the implementation, but each terminfo library provides these long names defined to point into the current terminal description loaded into memory.
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
ncurses(3NCURSES), terminfo(3NCURSES), threads(3NCURSES), terminfo(5).