ncursesw-morphos/doc/html/man/term_variables.3x.html
Thomas E. Dickey 58552e8c76 ncurses 6.0 - patch 20170107
+ amend changes for tput to reset tty modes to "sane" if the program
  is run as "reset", like tset.  Likewise, ensure that tset sends
  either reset- or init-strings.
+ improve manual page descriptions of tput init/reset and tset/reset,
  to make it easier to see how they are similar and different.
+ move a static result from key_name() to _nc_globals
+ modify _nc_get_screensize to allow for use_env() and use_tioctl()
  state to be per-screen when sp-funcs are configured, better matching
  the behavior when using the term-driver configuration.
+ improve cross-references in manual pages for often used functions
+ move SCREEN field for use_tioctl() data before the ncursesw fields,
  and limit that to the sp-funcs configuration to improve termlib
  compatibility (cf:  20120714).
+ correct order of initialization for traces in use_env() and
  use_tioctl() versus first trace calls.
2017-01-08 01:40:29 +00:00

202 lines
11 KiB
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<H1 class="no-header">term_variables 3x</H1>
<PRE>
<STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG> <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>SP</STRONG>, <STRONG>acs_map</STRONG>, <STRONG>boolcodes</STRONG>, <STRONG>boolfnames</STRONG>, <STRONG>boolnames</STRONG>, <STRONG>cur_term</STRONG>,
<STRONG>numcodes</STRONG>, <STRONG>numfnames</STRONG>, <STRONG>numnames</STRONG>, <STRONG>strcodes</STRONG>, <STRONG>strfnames</STRONG>,
<STRONG>strnames</STRONG>, <STRONG>ttytype</STRONG> - <STRONG>curses</STRONG> terminfo global variables
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
<STRONG>#include</STRONG> <STRONG>&lt;term.h&gt;</STRONG>
<STRONG>chtype</STRONG> <STRONG>acs_map[];</STRONG>
<STRONG>SCREEN</STRONG> <STRONG>*</STRONG> <STRONG>SP;</STRONG>
<STRONG>TERMINAL</STRONG> <STRONG>*</STRONG> <STRONG>cur_term;</STRONG>
<STRONG>char</STRONG> <STRONG>ttytype[];</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolcodes;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolfnames;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolnames;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numcodes;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numfnames;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numnames;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strcodes;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strfnames;</STRONG>
<STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strnames;</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
This page summarizes variables provided by the <STRONG>curses</STRONG> li-
brary's low-level terminfo interface. A more complete de-
scription is given in the <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> manual page.
Depending on the configuration, these may be actual vari-
ables, or macros (see <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>) which provide
read-only access to <EM>curses</EM>'s state. In either case, ap-
plications should treat them as read-only to avoid confus-
ing the library.
</PRE><H3><a name="h3-Alternate-Character-Set-Mapping">Alternate Character Set Mapping</a></H3><PRE>
After initializing the curses or terminfo interfaces, the
<STRONG>acs_map</STRONG> array holds information used to translate cells
with the <STRONG>A_ALTCHARSET</STRONG> 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 &lt;curses.h&gt;.
The comparable data for the wide-character library is a
private variable.
</PRE><H3><a name="h3-Current-Terminal-Data">Current Terminal Data</a></H3><PRE>
After initializing the curses or terminfo interfaces, the
<STRONG>cur_term</STRONG> contains data describing the current terminal.
This variable is also set as a side-effect of <STRONG><A HREF="curs_initscr.3x.html">set_term(3x)</A></STRONG>
and <STRONG><A HREF="curs_initscr.3x.html">delscreen(3x)</A></STRONG>.
It is possible to save a value of <STRONG>cur_term</STRONG> for subsequent
use as a parameter to <STRONG>set_term</STRONG>, for switching between
screens. Alternatively, one can save the return value
from <STRONG>newterm</STRONG> or <STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG> to reuse in <STRONG>set_term</STRONG>.
</PRE><H3><a name="h3-Terminfo-Names">Terminfo Names</a></H3><PRE>
The <STRONG><A HREF="tic.1m.html">tic(1)</A></STRONG> and <STRONG><A HREF="infocmp.1m.html">infocmp(1)</A></STRONG> 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: <STRONG>boolfnames</STRONG>, <STRONG>numfnames</STRONG>, and <STRONG>strfnames</STRONG>.
These are the short names for terminfo capabilities: <STRONG>bool-</STRONG>
<STRONG>names</STRONG>, <STRONG>numnames</STRONG>, and <STRONG>strnames</STRONG>.
These are the corresponding names used for termcap de-
scriptions: <STRONG>boolcodes</STRONG>, <STRONG>numcodes</STRONG>, and <STRONG>strcodes</STRONG>.
</PRE><H3><a name="h3-Terminal-Type">Terminal Type</a></H3><PRE>
On initialization of the curses or terminfo interfaces,
<STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG> copies the terminal name to the array <STRONG>tty-</STRONG>
<STRONG>type</STRONG>.
</PRE><H3><a name="h3-Terminfo-Names">Terminfo Names</a></H3><PRE>
In addition to the variables, <STRONG>&lt;term.h&gt;</STRONG> also defines a sym-
bol for each terminfo capability <EM>long</EM> <EM>name</EM>. These are in
terms of the symbol <STRONG>CUR</STRONG>, which is defined
#define CUR cur_term-&gt;type.
These symbols provide a faster method of accessing termin-
fo capabilities than using <STRONG><A HREF="curs_terminfo.3x.html">tigetstr(3x)</A></STRONG>, etc.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
The low-level terminfo interface is initialized using
<STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG>. The upper-level curses interface uses the
low-level terminfo interface, internally.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
X/Open Curses does not describe any of these except for
<STRONG>cur_term</STRONG>. (The inclusion of <STRONG>cur_term</STRONG> 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 <STRONG>Terminfo</STRONG> <STRONG>Names</STRONG> section.
Most, but not all, base the definition upon the <STRONG>cur_term</STRONG>
variable.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>, <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>,
<STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>.
<STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
<ul>
<li><a href="#h3-Alternate-Character-Set-Mapping">Alternate Character Set Mapping</a></li>
<li><a href="#h3-Current-Terminal-Data">Current Terminal Data</a></li>
<li><a href="#h3-Terminfo-Names">Terminfo Names</a></li>
<li><a href="#h3-Terminal-Type">Terminal Type</a></li>
<li><a href="#h3-Terminfo-Names">Terminfo Names</a></li>
</ul>
</li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
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