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boolcodes(3ncurses)


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 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
   On  initialization  of  the  curses  or  terminfo interfaces, setupterm
   copies the terminal name 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 cur_term->type.

   These  symbols  provide  a  faster   method   of   accessing   terminfo
   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

   ncurses(3NCURSES), terminfo(3NCURSES), threads(3NCURSES), terminfo(5).

                                              terminfo_variables(3NCURSES)



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