release/src/router/libncurses/doc/html/man/curs_termcap.3x.html

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  34 <TITLE>curs_termcap 3x</TITLE>
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  39 <H1>curs_termcap 3x</H1>
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  41 <PRE>
  42 <!-- Manpage converted by man2html 3.0.1 -->
  43 <STRONG><A HREF="curs_termcap.3x.html">curs_termcap(3x)</A></STRONG>                                       <STRONG><A HREF="curs_termcap.3x.html">curs_termcap(3x)</A></STRONG>
  44
  45
  46
  47
  48 </PRE>
  49 <H2>NAME</H2><PRE>
  50        <STRONG>PC</STRONG>, <STRONG>UP</STRONG>, <STRONG>BC</STRONG>, <STRONG>ospeed</STRONG>, <STRONG>tgetent</STRONG>, <STRONG>tgetflag</STRONG>, <STRONG>tgetnum</STRONG>, <STRONG>tgetstr</STRONG>,
  51        <STRONG>tgoto</STRONG>, <STRONG>tputs</STRONG> - direct <STRONG>curses</STRONG> interface to the terminfo
  52        capability database
  53
  54
  55 </PRE>
  56 <H2>SYNOPSIS</H2><PRE>
  57        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  58        <STRONG>#include</STRONG> <STRONG>&lt;term.h&gt;</STRONG>
  59
  60        <STRONG>extern</STRONG> <STRONG>char</STRONG> <STRONG>PC;</STRONG>
  61        <STRONG>extern</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>UP;</STRONG>
  62        <STRONG>extern</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>BC;</STRONG>
  63        <STRONG>extern</STRONG> <STRONG>short</STRONG> <STRONG>ospeed;</STRONG>
  64
  65        <STRONG>int</STRONG> <STRONG>tgetent(char</STRONG> <STRONG>*bp,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*name);</STRONG>
  66        <STRONG>int</STRONG> <STRONG>tgetflag(char</STRONG> <STRONG>*id);</STRONG>
  67        <STRONG>int</STRONG> <STRONG>tgetnum(char</STRONG> <STRONG>*id);</STRONG>
  68        <STRONG>char</STRONG> <STRONG>*tgetstr(char</STRONG> <STRONG>*id,</STRONG> <STRONG>char</STRONG> <STRONG>**area);</STRONG>
  69        <STRONG>char</STRONG> <STRONG>*tgoto(const</STRONG> <STRONG>char</STRONG> <STRONG>*cap,</STRONG> <STRONG>int</STRONG> <STRONG>col,</STRONG> <STRONG>int</STRONG> <STRONG>row);</STRONG>
  70        <STRONG>int</STRONG> <STRONG>tputs(const</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>affcnt,</STRONG> <STRONG>int</STRONG> <STRONG>(*putc)(int));</STRONG>
  71
  72
  73 </PRE>
  74 <H2>DESCRIPTION</H2><PRE>
  75        These  routines  are included as a conversion aid for pro-
  76        grams that use the <EM>termcap</EM> library.  Their parameters  are
  77        the  same and the routines are emulated using the <EM>terminfo</EM>
  78        database.  Thus, they can only be used to query the  capa-
  79        bilities  of  entries  for which a terminfo entry has been
  80        compiled.
  81
  82        The <STRONG>tgetent</STRONG> routine loads the entry for <EM>name</EM>.  It  returns
  83        1  on  success, 0 if there is no such entry, and -1 if the
  84        terminfo database could not be found.  The  emulation  ig-
  85        nores the buffer pointer <EM>bp</EM>.
  86
  87        The <STRONG>tgetflag</STRONG> routine gets the boolean entry for <EM>id</EM>, or ze-
  88        ro if it is not available.
  89
  90        The <STRONG>tgetnum</STRONG> routine gets the numeric entry for <EM>id</EM>,  or  -1
  91        if it is not available.
  92
  93        The  <STRONG>tgetstr</STRONG>  routine  returns the string entry for <EM>id</EM>, or
  94        zero if it is not available.  Use <STRONG>tputs</STRONG> to output the  re-
  95        turned  string.   The  return value will also be copied to
  96        the buffer pointed to by <EM>area</EM>, and the <EM>area</EM> value will  be
  97        updated to point past the null ending this value.
  98
  99        Only the first two characters of the <STRONG>id</STRONG> parameter of <STRONG>tget-</STRONG>
 100        <STRONG>flag</STRONG>, <STRONG>tgetnum</STRONG> and <STRONG>tgetstr</STRONG> are compared in lookups.
 101
 102        The <STRONG>tgoto</STRONG> routine instantiates  the  parameters  into  the
 103        given  capability.   The output from this routine is to be
 104        passed to <STRONG>tputs</STRONG>.
 105
 106        The <STRONG>tputs</STRONG> routine is described  on  the  <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>
 107        manual page.  It can retrieve capabilities by either term-
 108        cap or terminfo name.
 109
 110        The variables <STRONG>PC</STRONG>, <STRONG>UP</STRONG> and <STRONG>BC</STRONG> are set by <STRONG>tgetent</STRONG> to the ter-
 111        minfo   entry's   data   for   <STRONG>pad_char</STRONG>,   <STRONG>cursor_up</STRONG>   and
 112        <STRONG>backspace_if_not_bs</STRONG>, respectively.   <STRONG>UP</STRONG>  is  not  used  by
 113        ncurses.  <STRONG>PC</STRONG> is used in the <STRONG>tdelay_output</STRONG> function.  <STRONG>BC</STRONG> is
 114        used in the <STRONG>tgoto</STRONG> emulation.  The variable <STRONG>ospeed</STRONG>  is  set
 115        by ncurses in a system-specific coding to reflect the ter-
 116        minal speed.
 117
 118
 119 </PRE>
 120 <H2>RETURN VALUE</H2><PRE>
 121        Except where explicitly noted, routines that return an in-
 122        teger  return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> (SVr4 only specifies
 123        "an integer value other than <STRONG>ERR</STRONG>") upon successful comple-
 124        tion.
 125
 126        Routines that return pointers return <STRONG>NULL</STRONG> on error.
 127
 128
 129 </PRE>
 130 <H2>BUGS</H2><PRE>
 131        If you call <STRONG>tgetstr</STRONG> to fetch <STRONG>ca</STRONG> or any other parameterized
 132        string, be aware that it will be returned in terminfo  no-
 133        tation, not the older and not-quite-compatible termcap no-
 134        tation.  This will not cause problems if all you  do  with
 135        it  is  call  <STRONG>tgoto</STRONG>  or <STRONG>tparm</STRONG>, which both expand terminfo-
 136        style strings as terminfo.  (The <STRONG>tgoto</STRONG> function,  if  con-
 137        figured  to  support  termcap, will check if the string is
 138        indeed terminfo-style by looking for  "%p"  parameters  or
 139        "$&lt;..&gt;"  delays,  and invoke a termcap-style parser if the
 140        string does not appear to be terminfo).
 141
 142        Because terminfo conventions for representing  padding  in
 143        string  capabilities  differ  from termcap's, <STRONG>tputs("50");</STRONG>
 144        will put out a literal "50" rather than  busy-waiting  for
 145        50 milliseconds.  Cope with it.
 146
 147        Note  that termcap has nothing analogous to terminfo's <STRONG>sgr</STRONG>
 148        string.  One consequence of this is that termcap  applica-
 149        tions  assume me (terminfo <STRONG>sgr0</STRONG>) does not reset the alter-
 150        nate character set.  This implementation checks  for,  and
 151        modifies the data shown to the termcap interface to accom-
 152        modate termcap's limitation in this respect.
 153
 154
 155 </PRE>
 156 <H2>PORTABILITY</H2><PRE>
 157        The XSI Curses standard, Issue  4  describes  these  func-
 158        tions.   However,  they are marked TO BE WITHDRAWN and may
 159        be removed in future versions.
 160
 161        Neither the XSI Curses standard nor  the  SVr4  man  pages
 162        documented  the return values of <STRONG>tgetent</STRONG> correctly, though
 163        all three were in fact returned ever since SVr1.  In  par-
 164        ticular,  an  omission in the XSI Curses documentation has
 165        been misinterpreted to mean that  <STRONG>tgetent</STRONG>  returns  <STRONG>OK</STRONG>  or
 166        <STRONG>ERR</STRONG>.  Because the purpose of these functions is to provide
 167        compatibility with the <EM>termcap</EM> library, that is  a  defect
 168        in XCurses, Issue 4, Version 2 rather than in ncurses.
 169
 170        External  variables  are  provided  for support of certain
 171        termcap applications.  However, termcap applications'  use
 172        of those variables is poorly documented, e.g., not distin-
 173        guishing between input and output.   In  particular,  some
 174        applications are reported to declare and/or modify <STRONG>ospeed</STRONG>.
 175
 176
 177 </PRE>
 178 <H2>SEE ALSO</H2><PRE>
 179        <STRONG><A HREF="ncurses.3x.html">curses(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>, <STRONG><A HREF="putc.3.html">putc(3)</A></STRONG>.
 180
 181
 182
 183                                                        <STRONG><A HREF="curs_termcap.3x.html">curs_termcap(3x)</A></STRONG>
 184 </PRE>
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