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  37 <TITLE>form_field_userptr 3x 2023-10-07 ncurses 6.4 Library calls</TITLE>
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  42 <H1 class="no-header">form_field_userptr 3x 2023-10-07 ncurses 6.4 Library calls</H1>
  43 <PRE>
  44 <STRONG><A HREF="form_field_userptr.3x.html">form_field_userptr(3x)</A></STRONG>           Library calls          <STRONG><A HREF="form_field_userptr.3x.html">form_field_userptr(3x)</A></STRONG>
  45
  46
  47
  48
  49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>set_field_userptr</STRONG>,  <STRONG>field_userptr</STRONG>  -  associate application data with a
  51        form field
  52
  53
  54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  55        <STRONG>#include</STRONG> <STRONG>&lt;form.h&gt;</STRONG>
  56
  57        <STRONG>int</STRONG> <STRONG>set_field_userptr(FIELD</STRONG> <STRONG>*</STRONG><EM>field</EM><STRONG>,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG><EM>userptr</EM><STRONG>);</STRONG>
  58        <STRONG>void</STRONG> <STRONG>*field_userptr(const</STRONG> <STRONG>FIELD</STRONG> <STRONG>*</STRONG><EM>field</EM><STRONG>);</STRONG>
  59
  60
  61 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  62        Every form field has a field that can  be  used  to  hold  application-
  63        specific  data  (that is, the form-driver code leaves it alone).  These
  64        functions get and set that field.
  65
  66
  67 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
  68        The function <STRONG>field_userptr</STRONG> returns a pointer (which may be  <STRONG>NULL</STRONG>).   It
  69        does not set <STRONG>errno</STRONG>.
  70
  71        The function <STRONG>set_field_userptr</STRONG> returns <STRONG>E_OK</STRONG> (success).
  72
  73
  74 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
  75        The  header  file  <STRONG>&lt;form.h&gt;</STRONG>  automatically  includes  the  header  file
  76        <STRONG>&lt;curses.h&gt;</STRONG>.
  77
  78
  79 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
  80        These routines emulate the System  V  forms  library.   They  were  not
  81        supported on Version 7 or BSD versions.
  82
  83        The user pointer is a void pointer.  We chose not to leave it as a char
  84        pointer for SVr4 compatibility.
  85
  86
  87 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
  88        Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S.
  89        Raymond.
  90
  91
  92 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
  93        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>
  94
  95
  96
  97 ncurses 6.4                       2023-10-07            <STRONG><A HREF="form_field_userptr.3x.html">form_field_userptr(3x)</A></STRONG>
  98 </PRE>
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 100 <ul>
 101 <li><a href="#h2-NAME">NAME</a></li>
 102 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 103 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
 104 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 105 <li><a href="#h2-NOTES">NOTES</a></li>
 106 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 107 <li><a href="#h2-AUTHORS">AUTHORS</a></li>
 108 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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