fld_link.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
31 ****************************************************************************/
32
33#include "form.priv.h"
34
35MODULE_ID("$Id: fld_link.c,v 1.4 1999/05/16 17:18:18 juergen Exp $")
36
37/*---------------------------------------------------------------------------
38|   Facility      :  libnform
39|   Function      :  FIELD *link_field(FIELD *field, int frow, int fcol)
40|
41|   Description   :  Duplicates the field at the specified position. The
42|                    new field shares its buffers with the original one,
43|                    the attributes are independent.
44|                    If an error occurs, errno is set to
45|
46|                    E_BAD_ARGUMENT - invalid argument
47|                    E_SYSTEM_ERROR - system error
48|
49|   Return Values :  Pointer to the new field or NULL if failure
50+--------------------------------------------------------------------------*/
51FIELD *link_field(FIELD * field, int frow, int fcol)
52{
53  FIELD *New_Field = (FIELD *)0;
54  int err = E_BAD_ARGUMENT;
55
56  if (field && (frow>=0) && (fcol>=0) &&
57      ((err=E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
58      (New_Field = (FIELD *)malloc(sizeof(FIELD))) )
59    {
60      *New_Field        = *_nc_Default_Field;
61      New_Field->frow   = frow;
62      New_Field->fcol   = fcol;
63      New_Field->link   = field->link;
64      field->link       = New_Field;
65      New_Field->buf    = field->buf;
66      New_Field->rows   = field->rows;
67      New_Field->cols   = field->cols;
68      New_Field->nrow   = field->nrow;
69      New_Field->nbuf   = field->nbuf;
70      New_Field->drows  = field->drows;
71      New_Field->dcols  = field->dcols;
72      New_Field->maxgrow= field->maxgrow;
73      New_Field->just   = field->just;
74      New_Field->fore   = field->fore;
75      New_Field->back   = field->back;
76      New_Field->pad    = field->pad;
77      New_Field->opts   = field->opts;
78      New_Field->usrptr = field->usrptr;
79      if (_nc_Copy_Type(New_Field,field))
80	return New_Field;
81    }
82
83  if (New_Field)
84    free_field(New_Field);
85
86  SET_ERROR( err );
87  return (FIELD *)0;
88}
89
90/* fld_link.c ends here */
91