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'\" t
.\"***************************************************************************
.\" Copyright 2018,2020 Thomas E. Dickey *
.\" Copyright 1998-2010,2015 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 *
.\" "Software"), to deal in the Software without restriction, including *
.\" without limitation the rights to use, copy, modify, merge, publish, *
.\" distribute, distribute with modifications, sublicense, and/or sell *
.\" copies of the Software, and to permit persons to whom the Software is *
.\" furnished to do so, subject to the following conditions: *
.\" *
.\" The above copyright notice and this permission notice shall be included *
.\" in all copies or substantial portions of the Software. *
.\" *
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
.\" *
.\" Except as contained in this notice, the name(s) of the above copyright *
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.\"***************************************************************************
.\"
.\" $Id: form_field_userptr.3x,v 1.16 2020/10/24 09:06:33 tom Exp $
.TH form_field_userptr 3X ""
.SH NAME
\fBset_field_userptr\fR,
\fBfield_userptr\fR \- associate application data with a form field
.SH SYNOPSIS
\fB#include <form.h>\fR
.sp
\fBint set_field_userptr(FIELD *\fP\fIfield\fP\fB, void *\fP\fIuserptr\fP\fB);\fP
.br
\fBvoid *field_userptr(const FIELD *\fP\fIfield\fP\fB);\fP
.SH DESCRIPTION
Every form field has a field that can be used to hold application-specific data
(that is, the form-driver code leaves it alone).
These functions get and set
that field.
.SH RETURN VALUE
The function \fBfield_userptr\fR returns a pointer (which may be \fBNULL\fR).
It does not set \fBerrno\fP.
.PP
The function \fBset_field_userptr\fR returns \fBE_OK\fP (success).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).
.SH NOTES
The header file \fB<form.h>\fR automatically includes the header file
\fB<curses.h>\fR.
.SH PORTABILITY
These routines emulate the System V forms library.
They were not supported on
Version 7 or BSD versions.
.PP
The user pointer is a void pointer.
We chose not to leave it as a char pointer for SVr4 compatibility.
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.
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