ncurses 5.7 - patch 20100123
[ncurses.git] / form / fld_dup.c
1 /****************************************************************************
2  * Copyright (c) 1998-2007,2010 Free Software Foundation, Inc.              *
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10  * furnished to do so, subject to the following conditions:                 *
11  *                                                                          *
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14  *                                                                          *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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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    *
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25  * sale, use or other dealings in this Software without prior written       *
26  * authorization.                                                           *
27  ****************************************************************************/
28
29 /****************************************************************************
30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
31  ****************************************************************************/
32
33 #include "form.priv.h"
34
35 MODULE_ID("$Id: fld_dup.c,v 1.13 2010/01/23 21:14:35 tom Exp $")
36
37 /*---------------------------------------------------------------------------
38 |   Facility      :  libnform
39 |   Function      :  FIELD *dup_field(FIELD *field, int frow, int fcol)
40 |
41 |   Description   :  Duplicates the field at the specified position. All
42 |                    field attributes and the buffers are copied.
43 |                    If an error occurs, errno is set to
44 |
45 |                    E_BAD_ARGUMENT - invalid argument
46 |                    E_SYSTEM_ERROR - system error
47 |
48 |   Return Values :  Pointer to the new field or NULL if failure
49 +--------------------------------------------------------------------------*/
50 NCURSES_EXPORT(FIELD *)
51 dup_field(FIELD *field, int frow, int fcol)
52 {
53   FIELD *New_Field = (FIELD *)0;
54   int err = E_BAD_ARGUMENT;
55
56   T((T_CALLED("dup_field(%p,%d,%d)"), (void *)field, frow, fcol));
57   if (field && (frow >= 0) && (fcol >= 0) &&
58       ((err = E_SYSTEM_ERROR) != 0) &&  /* trick : this resets the default error */
59       (New_Field = typeMalloc(FIELD, 1)))
60     {
61       T((T_CREATE("field %p"), (void *)New_Field));
62       *New_Field = *_nc_Default_Field;
63       New_Field->frow = frow;
64       New_Field->fcol = fcol;
65       New_Field->link = New_Field;
66       New_Field->rows = field->rows;
67       New_Field->cols = field->cols;
68       New_Field->nrow = field->nrow;
69       New_Field->drows = field->drows;
70       New_Field->dcols = field->dcols;
71       New_Field->maxgrow = field->maxgrow;
72       New_Field->nbuf = field->nbuf;
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
80       if (_nc_Copy_Type(New_Field, field))
81         {
82           size_t i, len;
83
84           len = Total_Buffer_Size(New_Field);
85           if ((New_Field->buf = (FIELD_CELL *)malloc(len)))
86             {
87               for (i = 0; i < len; ++i)
88                 New_Field->buf[i] = field->buf[i];
89               returnField(New_Field);
90             }
91         }
92     }
93
94   if (New_Field)
95     free_field(New_Field);
96
97   SET_ERROR(err);
98   returnField((FIELD *)0);
99 }
100
101 /* fld_dup.c ends here */