ncurses 6.0 - patch 20160130
[ncurses.git] / doc / html / man / term_variables.3x.html
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41 <H1 class="no-header">term_variables 3x</H1>
42 <PRE>
43 <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>                                   <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>
44
45
46
47
48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
49        <STRONG>SP</STRONG>, <STRONG>acs_map</STRONG>, <STRONG>boolcodes</STRONG>, <STRONG>boolfnames</STRONG>, <STRONG>boolnames</STRONG>, <STRONG>cur_term</STRONG>,
50        <STRONG>numcodes</STRONG>, <STRONG>numfnames</STRONG>, <STRONG>numnames</STRONG>, <STRONG>strcodes</STRONG>, <STRONG>strfnames</STRONG>,
51        <STRONG>strnames</STRONG>, <STRONG>ttytype</STRONG> - <STRONG>curses</STRONG> terminfo global variables
52
53
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
56        <STRONG>#include</STRONG> <STRONG>&lt;term.h&gt;</STRONG>
57
58        <STRONG>chtype</STRONG> <STRONG>acs_map[];</STRONG>
59
60        <STRONG>SCREEN</STRONG> <STRONG>*</STRONG> <STRONG>SP;</STRONG>
61
62        <STRONG>TERMINAL</STRONG> <STRONG>*</STRONG> <STRONG>cur_term;</STRONG>
63
64        <STRONG>char</STRONG> <STRONG>ttytype[];</STRONG>
65
66        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolcodes;</STRONG>
67        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolfnames;</STRONG>
68        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>boolnames;</STRONG>
69
70        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numcodes;</STRONG>
71        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numfnames;</STRONG>
72        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>numnames;</STRONG>
73
74        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strcodes;</STRONG>
75        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strfnames;</STRONG>
76        <STRONG>NCURSES_CONST</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>*</STRONG> <STRONG>strnames;</STRONG>
77
78
79 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
80        This  page summarizes variables provided by the <STRONG>curses</STRONG> li-
81        brary's low-level terminfo interface.  A more complete de-
82        scription is given in the <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> manual page.
83
84        Depending  on the configuration, these may be actual vari-
85        ables, or  macros  (see  <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>)  which  provide
86        read-only  access  to <EM>curses</EM>'s state.  In either case, ap-
87        plications should treat them as read-only to avoid confus-
88        ing the library.
89
90
91 </PRE><H3><a name="h3-Alternate-Character-Set-Mapping">Alternate Character Set Mapping</a></H3><PRE>
92        After  initializing the curses or terminfo interfaces, the
93        <STRONG>acs_map</STRONG> array holds information used  to  translate  cells
94        with  the  <STRONG>A_ALTCHARSET</STRONG>  video attribute into line-drawing
95        characters.
96
97        The encoding of the information in this array has  changed
98        periodically.   Application developers need only know that
99        it is used for the "ACS_" constants in &lt;curses.h&gt;.
100
101        The comparable data for the wide-character  library  is  a
102        private variable.
103
104
105 </PRE><H3><a name="h3-Current-Terminal-Data">Current Terminal Data</a></H3><PRE>
106        After  initializing the curses or terminfo interfaces, the
107        <STRONG>cur_term</STRONG> contains data describing  the  current  terminal.
108        This variable is also set as a side-effect of <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>
109        and <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>.
110
111        It is possible to save a value of <STRONG>cur_term</STRONG> for  subsequent
112        use  as  a  parameter  to  <STRONG>set_term</STRONG>, for switching between
113        screens.  Alternatively, one can  save  the  return  value
114        from <STRONG>newterm</STRONG> or <STRONG>setupterm</STRONG> to reuse in <STRONG>set_term</STRONG>.
115
116
117 </PRE><H3><a name="h3-Terminfo-Names">Terminfo Names</a></H3><PRE>
118        The  <STRONG><A HREF="tic.1m.html">tic(1m)</A></STRONG>  and <STRONG><A HREF="infocmp.1m.html">infocmp(1m)</A></STRONG> programs use lookup tables for
119        the long and short names of terminfo capabilities, as well
120        as  the  corresponding  names  for  termcap  capabilities.
121        These are available to other  applications,  although  the
122        hash-tables used by the terminfo and termcap functions are
123        not available.
124
125        The long terminfo capability names  use  a  "l"  (ell)  in
126        their names: <STRONG>boolfnames</STRONG>, <STRONG>numfnames</STRONG>, and <STRONG>strfnames</STRONG>.
127
128        These are the short names for terminfo capabilities: <STRONG>bool-</STRONG>
129        <STRONG>names</STRONG>, <STRONG>numnames</STRONG>, and <STRONG>strnames</STRONG>.
130
131        These are the corresponding names  used  for  termcap  de-
132        scriptions: <STRONG>boolcodes</STRONG>, <STRONG>numcodes</STRONG>, and <STRONG>strcodes</STRONG>.
133
134
135 </PRE><H3><a name="h3-Terminal-Type">Terminal Type</a></H3><PRE>
136        On  initialization  of  the curses or terminfo interfaces,
137        <STRONG>setupterm</STRONG> copies the terminal name to the array <STRONG>ttytype</STRONG>.
138
139
140 </PRE><H3><a name="h3-Terminfo-Names">Terminfo Names</a></H3><PRE>
141        In addition to the variables, <STRONG>&lt;term.h&gt;</STRONG> also defines a sym-
142        bol  for each terminfo capability <EM>long</EM> <EM>name</EM>.  These are in
143        terms of the symbol <STRONG>CUR</STRONG>, which is defined
144
145        #define CUR cur_term-&gt;type.
146
147        These symbols provide a faster method of accessing termin-
148        fo capabilities than using <STRONG><A HREF="tigetstr.3x.html">tigetstr(3x)</A></STRONG>, etc.
149
150
151 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
152        The  low-level  terminfo  interface  is  initialized using
153        <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>.  The upper-level curses interface uses  the
154        low-level terminfo interface, internally.
155
156
157 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
158        X/Open  Curses  does  not describe any of these except for
159        <STRONG>cur_term</STRONG>.  (The inclusion of <STRONG>cur_term</STRONG>  appears  to  be  an
160        oversight, since other comparable low-level information is
161        omitted by X/Open).
162
163        Other implementations may have comparable variables.  Some
164        implementations  provide the variables in their libraries,
165        but omit them from the header files.
166
167        All implementations which provide terminfo interfaces  add
168        definitions  as  described  in the <STRONG>Terminfo</STRONG> <STRONG>Names</STRONG> section.
169        Most, but not all, base the definition upon  the  <STRONG>cur_term</STRONG>
170        variable.
171
172
173 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
174        <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>,
175        <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>.
176
177
178
179                                                      <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>
180 </PRE>
181 <div class="nav">
182 <ul>
183 <li><a href="#h2-NAME">NAME</a></li>
184 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
185 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
186 <ul>
187 <li><a href="#h3-Alternate-Character-Set-Mapping">Alternate Character Set Mapping</a></li>
188 <li><a href="#h3-Current-Terminal-Data">Current Terminal Data</a></li>
189 <li><a href="#h3-Terminfo-Names">Terminfo Names</a></li>
190 <li><a href="#h3-Terminal-Type">Terminal Type</a></li>
191 <li><a href="#h3-Terminfo-Names">Terminfo Names</a></li>
192 </ul>
193 </li>
194 <li><a href="#h2-NOTES">NOTES</a></li>
195 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
196 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
197 </ul>
198 </div>
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