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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
35 MODULE_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 +--------------------------------------------------------------------------*/
51 FIELD *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 */