'\" t
+.\"***************************************************************************
+.\" Copyright 2018-2020,2021 Thomas E. Dickey *
+.\" Copyright 1998-2007,2010 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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+.\" sale, use or other dealings in this Software without prior written *
+.\" authorization. *
+.\"***************************************************************************
+.\"
+.\" $Id: form_hook.3x,v 1.18 2021/12/25 21:49:32 tom Exp $
.TH form_hook 3X ""
.SH NAME
-\fBform_hook\fR - set hooks for automatic invocation by applications
+\fBform_hook\fP \- set hooks for automatic invocation by applications
.SH SYNOPSIS
-\fB#include <form.h>\fR
+\fB#include <form.h>\fP
+.sp
+\fBint set_field_init(FORM *\fP\fIform\fP\fB, Form_Hook \fP\fIfunc\fP\fB);\fP
.br
-int set_field_init(FORM *form, void (*func)(FORM *));
+\fBForm_Hook field_init(const FORM *\fP\fIform\fP\fB);\fP
+.sp
+\fBint set_field_term(FORM *\fP\fIform\fP\fB, Form_Hook \fP\fIfunc\fP\fB);\fP
.br
-void (*)(FORM *) field_init(const FORM *form);
+\fBForm_Hook field_term(const FORM *\fP\fIform\fP\fB);\fP
+.sp
+\fBint set_form_init(FORM *\fP\fIform\fP\fB, Form_Hook \fP\fIfunc\fP\fB);\fP
.br
-int set_field_term(FORM *form, void (*func)(FORM *));
+\fBForm_Hook form_init(const FORM *\fP\fIform\fP\fB);\fP
+.sp
+\fBint set_form_term(FORM *\fP\fIform\fP\fB, Form_Hook \fP\fIfunc\fP\fB);\fP
.br
-void (*)(FORM *) field_term(const FORM *form);
-.br
-int set_form_init(FORM *form, void (*func)(FORM *));
-.br
-void (*)(FORM *) form_init(const FORM *form);
-.br
-int set_form_term(FORM *form, void (*func)(FORM *));
-.br
-void (*)(FORM *) form_term(const FORM *form);
+\fBForm_Hook form_term(const FORM *\fP\fIform\fP\fB);\fP
.br
.SH DESCRIPTION
These functions make it possible to set hook functions to be called at various
-points in the automatic processing of input event codes by \fBform_driver\fR.
-
-The function \fBset_field_init\fR sets a hook to be called at form-post time
-and each time the selected field changes (after the change). \fBfield_init\fR
-returns the current field init hook, if any (\fBNULL\fR if there is no such
+points in the automatic processing of input event codes by \fBform_driver\fP.
+.PP
+The function \fBset_field_init\fP sets a hook to be called at form-post time
+and each time the selected field changes (after the change).
+\fBfield_init\fP
+returns the current field init hook, if any (\fBNULL\fP if there is no such
hook).
-
-The function \fBset_field_term\fR sets a hook to be called at form-unpost time
-and each time the selected field changes (before the change). \fBfield_term\fR
-returns the current field term hook, if any (\fBNULL\fR if there is no such
+.PP
+The function \fBset_field_term\fP sets a hook to be called at form-unpost time
+and each time the selected field changes (before the change).
+\fBfield_term\fP
+returns the current field term hook, if any (\fBNULL\fP if there is no such
hook).
-
-The function \fBset_form_init\fR sets a hook to be called at form-post time and
-just after a page change once it is posted. \fBform_init\fR returns the
-current form init hook, if any (\fBNULL\fR if there is no such hook).
-
-The function \fBset_form_term\fR sets a hook to be called at form-unpost time
-and just before a page change change once it is posted. \fBform_init\fR
-returns the current form term hook, if any (\fBNULL\fR if there is no such
+.PP
+The function \fBset_form_init\fP sets a hook to be called at form-post time and
+just after a page change once it is posted.
+\fBform_init\fP returns the
+current form init hook, if any (\fBNULL\fP if there is no such hook).
+.PP
+The function \fBset_form_term\fP sets a hook to be called at form-unpost time
+and just before a page change once it is posted.
+\fBform_init\fP
+returns the current form term hook, if any (\fBNULL\fP if there is no such
hook).
.SH RETURN VALUE
-Routines that return pointers return \fBNULL\fR on error. Other routines
+Routines that return pointers return \fBNULL\fP on error.
+Other routines
return one of the following:
.TP 5
-\fBE_OK\fR
+.B E_OK
The routine succeeded.
.TP 5
-\fBE_SYSTEM_ERROR\fR
-System error occurred (see \fBerrno\fR).
+.B E_SYSTEM_ERROR
+System error occurred (see \fBerrno\fP(3)).
.SH SEE ALSO
-\fBcurses\fR(3X), \fBform\fR(3X).
+\fBcurses\fP(3X), \fBform\fP(3X).
.SH NOTES
-The header file \fB<form.h>\fR automatically includes the header file
-\fB<curses.h>\fR.
+The header file \fB<form.h>\fP automatically includes the header file
+\fB<curses.h>\fP.
.SH PORTABILITY
-These routines emulate the System V forms library. They were not supported on
+These routines emulate the System V forms library.
+They were not supported on
Version 7 or BSD versions.
.SH AUTHORS
-Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
-S. Raymond.
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End:
+Juergen Pfeifer.
+Manual pages and adaptation for new curses by Eric S. Raymond.
projects / ncurses.git / blobdiff