ncurses 6.2 - patch 20201219

[ncurses.git] / man / term_variables.3x

diff --git a/man/term_variables.3x b/man/term_variables.3x
index bd2e0f6e8b4c2bfb1b0179031040af6363898da6..0abaf0968bde50dcfcee54664e1f35c432151726 100644 (file)
--- a/man/term_variables.3x
+++ b/man/term_variables.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
 .\"***************************************************************************

-.\" Copyright (c) 2010,2011 Free Software Foundation, Inc.                   *
+.\" Copyright 2019,2020 Thomas E. Dickey                                     *
+.\" Copyright 2010-2015,2017 Free Software Foundation, Inc.                  *

 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *


@@ -26,9 +27,13 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"

-.\" $Id: term_variables.3x,v 1.3 2011/12/17 23:31:50 tom Exp $
+.\" $Id: term_variables.3x,v 1.12 2020/02/02 23:34:34 tom Exp $

 .TH term_variables 3X ""
 .ds n 5
 .TH term_variables 3X ""
 .ds n 5

+.ie \n(.g .ds `` \(lq
+.el       .ds `` ``
+.ie \n(.g .ds '' \(rq
+.el       .ds '' ''

 .na
 .hy 0
 .SH NAME
 .na
 .hy 0
 .SH NAME


@@ -55,28 +60,30 @@
 \fB#include <term.h>\fR
 .PP
 \fBchtype acs_map[];\fR
 \fB#include <term.h>\fR
 .PP
 \fBchtype acs_map[];\fR

-.br
-\fBNCURSES_CONST char * const * boolcodes;\fR
-.br
-\fBNCURSES_CONST char * const * boolfnames;\fR
-.br
-\fBNCURSES_CONST char * const * boolnames;\fR
-.br
+.sp
+\fBSCREEN * SP;\fR
+.sp

 \fBTERMINAL * cur_term;\fR
 \fBTERMINAL * cur_term;\fR

+.sp
+\fBchar ttytype[];\fR
+.sp
+\fBNCURSES_CONST char * const boolcodes[];\fR

 .br
 .br

-\fBNCURSES_CONST char * const * numcodes;\fR
-.br
-\fBNCURSES_CONST char * const * numfnames;\fR
+\fBNCURSES_CONST char * const boolfnames[];\fR

 .br
 .br

-\fBNCURSES_CONST char * const * numnames;\fR
+\fBNCURSES_CONST char * const boolnames[];\fR
+.sp
+\fBNCURSES_CONST char * const numcodes[];\fR

 .br
 .br

-\fBNCURSES_CONST char * const * strcodes;\fR
+\fBNCURSES_CONST char * const numfnames[];\fR

 .br
 .br

-\fBNCURSES_CONST char * const * strfnames;\fR
+\fBNCURSES_CONST char * const numnames[];\fR
+.sp
+\fBNCURSES_CONST char * const strcodes[];\fR

 .br
 .br

-\fBNCURSES_CONST char * const * strnames;\fR
+\fBNCURSES_CONST char * const strfnames[];\fR

 .br
 .br

-\fBchar ttytype[];\fR
+\fBNCURSES_CONST char * const strnames[];\fR

 .br
 .fi
 .SH DESCRIPTION
 .br
 .fi
 .SH DESCRIPTION


@@ -95,7 +102,7 @@ the \fBacs_map\fP array holds information used to translate cells
 with the \fBA_ALTCHARSET\fP video attribute into line-drawing characters.
 .PP
 The encoding of the information in this array has changed periodically.
 with the \fBA_ALTCHARSET\fP video attribute into line-drawing characters.
 .PP
 The encoding of the information in this array has changed periodically.

-Application developers need only know that it is used for the "ACS_"
+Application developers need only know that it is used for the \*(``ACS_\*(''

 constants in <curses.h>.
 .PP
 The comparable data for the wide-character library is a private variable.
 constants in <curses.h>.
 .PP
 The comparable data for the wide-character library is a private variable.


@@ -108,35 +115,64 @@ and \fBdelscreen\fP(3X).
 It is possible to save a value of \fBcur_term\fP for subsequent
 use as a parameter to \fBset_term\fP, for switching between screens.
 Alternatively, one can save the return value from \fBnewterm\fP
 It is possible to save a value of \fBcur_term\fP for subsequent
 use as a parameter to \fBset_term\fP, for switching between screens.
 Alternatively, one can save the return value from \fBnewterm\fP

-or \fBsetupterm\fP to reuse in \fBset_term\fP.
+or \fBsetupterm\fP(3X) to reuse in \fBset_term\fP.

 .SS Terminfo Names
 The \fB@TIC@\fP(1) and \fB@INFOCMP@\fP(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,
 .SS Terminfo Names
 The \fB@TIC@\fP(1) and \fB@INFOCMP@\fP(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,

-though the hash-tables are not available.
+although the hash-tables used by
+the terminfo and termcap functions are not available.

 .PP
 .PP

-The long terminfo capability names use a "l" (ell) in their names:
-boolfnames
-numfnames
-strfnames
+The long terminfo capability names use a \*(``l\*('' (ell) in their names:
+\fBboolfnames\fP,
+\fBnumfnames\fP, and
+\fBstrfnames\fP.

 .PP
 These are the short names for terminfo capabilities:
 .PP
 These are the short names for terminfo capabilities:

-boolnames,
-numnames, and
-strnames.
+\fBboolnames\fP,
+\fBnumnames\fP, and
+\fBstrnames\fP.

 .PP
 These are the corresponding names used for termcap descriptions:
 .PP
 These are the corresponding names used for termcap descriptions:

-boolcodes,
-numcodes, and
-strcodes.
+\fBboolcodes\fP,
+\fBnumcodes\fP, and
+\fBstrcodes\fP.
+.\"

 .SS Terminal Type
 .SS Terminal Type

+A terminal description begins with one or more terminal names
+separated by \*(``|\*('' (vertical bars).

 On initialization of the curses or terminfo interfaces,
 On initialization of the curses or terminfo interfaces,

-\fBsetupterm\fP copies the terminal name to the array \fBttytype\fP.
+\fBsetupterm\fP(3X) copies the terminal names to the array \fBttytype\fP.
+.\"
+.SS Terminfo Names
+.PP
+In addition to the variables, \fB<term.h>\fP also defines a symbol for each
+terminfo capability \fIlong name\fP.
+These are in terms of the symbol \fBCUR\fP,
+which is defined
+.PP
+.nf
+.ft CW
+#define CUR ((TERMTYPE *)(cur_term))->
+.fi
+.ft R
+.PP
+These symbols provide a faster method of accessing terminfo capabilities
+than using \fBtigetstr\fR(3X), etc.
+.PP
+The actual definition of \fBCUR\fP depends upon the implementation,
+but each terminfo library provides these long names defined to point
+into the current terminal description loaded into memory.
+.\"

 .SH NOTES
 .SH NOTES

-The low-level terminfo interface is initialized using \fBsetupterm\fR(3X).
+The low-level terminfo interface is initialized using
+.hy 0
+\fBsetupterm\fR(3X).
+.hy

 The upper-level curses interface uses the low-level terminfo interface,
 internally.
 The upper-level curses interface uses the low-level terminfo interface,
 internally.

+.\"

 .SH PORTABILITY
 X/Open Curses does not describe any of these except for \fBcur_term\fP.
 (The inclusion of \fBcur_term\fP appears to be an oversight,
 .SH PORTABILITY
 X/Open Curses does not describe any of these except for \fBcur_term\fP.
 (The inclusion of \fBcur_term\fP appears to be an oversight,


@@ -145,9 +181,14 @@ 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.
 Other implementations may have comparable variables.
 Some implementations provide the variables in their libraries,
 but omit them from the header files.

+.PP
+All implementations which provide terminfo interfaces add definitions
+as described in the \fBTerminfo Names\fP section.
+Most, but not all, base the definition upon the \fBcur_term\fP variable.

 .SH SEE ALSO
 .SH SEE ALSO

+.hy 0

 \fBcurses\fR(3X),
 \fBcurs_terminfo\fR(3X),
 \fBcurs_threads\fR(3X),
 \fBcurses\fR(3X),
 \fBcurs_terminfo\fR(3X),
 \fBcurs_threads\fR(3X),

-\fBterminfo\fR(3X),

 \fBterminfo\fR(\*n).
 \fBterminfo\fR(\*n).

+.hy