1 /* $OpenBSD: fld_link.c,v 1.7 2023/10/17 09:52:10 nicm Exp $ */
2 /****************************************************************************
3 * Copyright 2020,2021 Thomas E. Dickey *
4 * Copyright 1998-2010,2012 Free Software Foundation, Inc. *
5 * *
6 * Permission is hereby granted, free of charge, to any person obtaining a *
7 * copy of this software and associated documentation files (the *
8 * "Software"), to deal in the Software without restriction, including *
9 * without limitation the rights to use, copy, modify, merge, publish, *
10 * distribute, distribute with modifications, sublicense, and/or sell *
11 * copies of the Software, and to permit persons to whom the Software is *
12 * furnished to do so, subject to the following conditions: *
13 * *
14 * The above copyright notice and this permission notice shall be included *
15 * in all copies or substantial portions of the Software. *
16 * *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24 * *
25 * Except as contained in this notice, the name(s) of the above copyright *
26 * holders shall not be used in advertising or otherwise to promote the *
27 * sale, use or other dealings in this Software without prior written *
28 * authorization. *
29 ****************************************************************************/
30
31 /****************************************************************************
32 * Author: Juergen Pfeifer, 1995,1997 *
33 ****************************************************************************/
34
35 #include "form.priv.h"
36
37 MODULE_ID("$Id: fld_link.c,v 1.7 2023/10/17 09:52:10 nicm Exp $")
38
39 /*---------------------------------------------------------------------------
40 | Facility : libnform
41 | Function : FIELD *link_field(FIELD *field, int frow, int fcol)
42 |
43 | Description : Duplicates the field at the specified position. The
44 | new field shares its buffers with the original one,
45 | the attributes are independent.
46 | If an error occurs, errno is set to
47 |
48 | E_BAD_ARGUMENT - invalid argument
49 | E_SYSTEM_ERROR - system error
50 |
51 | Return Values : Pointer to the new field or NULL if failure
52 +--------------------------------------------------------------------------*/
FORM_EXPORT(FIELD *)53 FORM_EXPORT(FIELD *)
54 link_field(FIELD *field, int frow, int fcol)
55 {
56 FIELD *New_Field = (FIELD *)0;
57 int err = E_BAD_ARGUMENT;
58
59 T((T_CALLED("link_field(%p,%d,%d)"), (void *)field, frow, fcol));
60 if (field && (frow >= 0) && (fcol >= 0) &&
61 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
62 (New_Field = typeMalloc(FIELD, 1)))
63 {
64 T((T_CREATE("field %p"), (void *)New_Field));
65 *New_Field = *_nc_Default_Field;
66 New_Field->frow = (short)frow;
67 New_Field->fcol = (short)fcol;
68
69 New_Field->link = field->link;
70 field->link = New_Field;
71
72 New_Field->buf = field->buf;
73 New_Field->rows = field->rows;
74 New_Field->cols = field->cols;
75 New_Field->nrow = field->nrow;
76 New_Field->nbuf = field->nbuf;
77 New_Field->drows = field->drows;
78 New_Field->dcols = field->dcols;
79 New_Field->maxgrow = field->maxgrow;
80 New_Field->just = field->just;
81 New_Field->fore = field->fore;
82 New_Field->back = field->back;
83 New_Field->pad = field->pad;
84 New_Field->opts = field->opts;
85 New_Field->usrptr = field->usrptr;
86
87 if (_nc_Copy_Type(New_Field, field))
88 returnField(New_Field);
89 }
90
91 if (New_Field)
92 free_field(New_Field);
93
94 SET_ERROR(err);
95 returnField((FIELD *)0);
96 }
97
98 /* fld_link.c ends here */
99