1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2010,2012 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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24 * Except as contained in this notice, the name(s) of the above copyright *
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28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Juergen Pfeifer, 1995,1997 *
32 ****************************************************************************/
33
34 #include "form.priv.h"
35
36 MODULE_ID("$Id: fld_link.c,v 1.17 2021/06/17 21:20:30 tom Exp $")
37
38 /*---------------------------------------------------------------------------
39 | Facility : libnform
40 | Function : FIELD *link_field(FIELD *field, int frow, int fcol)
41 |
42 | Description : Duplicates the field at the specified position. The
43 | new field shares its buffers with the original one,
44 | the attributes are independent.
45 | If an error occurs, errno is set to
46 |
47 | E_BAD_ARGUMENT - invalid argument
48 | E_SYSTEM_ERROR - system error
49 |
50 | Return Values : Pointer to the new field or NULL if failure
51 +--------------------------------------------------------------------------*/
FORM_EXPORT(FIELD *)52 FORM_EXPORT(FIELD *)
53 link_field(FIELD *field, int frow, int fcol)
54 {
55 FIELD *New_Field = (FIELD *)0;
56 int err = E_BAD_ARGUMENT;
57
58 T((T_CALLED("link_field(%p,%d,%d)"), (void *)field, frow, fcol));
59 if (field && (frow >= 0) && (fcol >= 0) &&
60 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
61 (New_Field = typeMalloc(FIELD, 1)))
62 {
63 T((T_CREATE("field %p"), (void *)New_Field));
64 *New_Field = *_nc_Default_Field;
65 New_Field->frow = (short)frow;
66 New_Field->fcol = (short)fcol;
67
68 New_Field->link = field->link;
69 field->link = New_Field;
70
71 New_Field->buf = field->buf;
72 New_Field->rows = field->rows;
73 New_Field->cols = field->cols;
74 New_Field->nrow = field->nrow;
75 New_Field->nbuf = field->nbuf;
76 New_Field->drows = field->drows;
77 New_Field->dcols = field->dcols;
78 New_Field->maxgrow = field->maxgrow;
79 New_Field->just = field->just;
80 New_Field->fore = field->fore;
81 New_Field->back = field->back;
82 New_Field->pad = field->pad;
83 New_Field->opts = field->opts;
84 New_Field->usrptr = field->usrptr;
85
86 if (_nc_Copy_Type(New_Field, field))
87 returnField(New_Field);
88 }
89
90 if (New_Field)
91 free_field(New_Field);
92
93 SET_ERROR(err);
94 returnField((FIELD *)0);
95 }
96
97 /* fld_link.c ends here */
98