2002-01-15 05:47:02 +03:00
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.\" $NetBSD: form_field_buffer.3,v 1.2 2002/01/15 02:50:16 wiz Exp $
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2001-07-08 16:10:28 +04:00
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.\"
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.\" Copyright (c) 2001
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.\" Brett Lymn - blymn@baea.com.au, brett_lymn@yahoo.com.au
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.\"
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.\" This code is donated to The NetBSD Foundation by the author.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the Author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd January, 2001
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.Dt FORMS 3
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.Os
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.Sh NAME
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.Nm field_buffer ,
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.Nm field_status ,
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.Nm set_field_buffer ,
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.Nm set_field_status ,
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.Nm set_max_field
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.Nd form library
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.Sh LIBRARY
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.Lb libform
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.Sh SYNOPSIS
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.Fd #include <form.h>
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.Ft char *
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.Fn field_buffer "FIELD *field, int buffer"
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.Ft int
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.Fn field_status "FIELD *field"
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.Ft int
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.Fn set_field_buffer "FIELD *field, int buffer, char *value"
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.Ft int
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.Fn set_field_status "FIELD *field, int status"
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.Sh DESCRIPTION
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The
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.Fn field_buffer
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function returns the contents of the buffer number specified by
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.Fa buffer
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for the given field. If the requested buffer number exceeds the
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number of buffers attached to the field then NULL will be returned.
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The field buffer may be set by calling
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.Fn set_field_buffer
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which will set the given buffer number to the contents of the string
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passed. Calling
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.Fn field_status
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will return the status of the first buffer attached to the field. If
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the field has been modified then the function will return TRUE
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otherwise FALSE is returned, the status of the first buffer may be
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programmatically set by calling
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.Fn set_field_status .
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The maximum growth of a dynamic field can be set by calling
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.Fn set_max_field
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which limits the fields rows if the field is a multiline field or the
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fields columns if the field only has a single row.
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.Sh RETURN VALUES
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Functions returning pointers will return NULL if an error is detected.
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The functions that return an int will return one of the following error
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values:
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.Pp
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.Bl -tag -width E_UNKNOWN_COMMAND -compact
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.It Er E_OK
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The function was successful.
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.It Er E_BAD_ARGUMENT
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A bad parameter was passed to the function.
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.It Er E_SYSTEM_ERROR
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A system error occurred performing the function.
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.El
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.Sh SEE ALSO
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.Xr curses 3 ,
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.Xr forms 3
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.Sh NOTES
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The header
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.Pa <form.h>
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automatically includes both
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.Pa <curses.h>
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and
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.Pa <eti.h> .
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