ncurses 5.3
[ncurses.git] / form / fld_dup.c
1 /****************************************************************************
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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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28
29 /****************************************************************************
30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
31  *   Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en             *
32  ****************************************************************************/
33
34 #include "form.priv.h"
35
36 MODULE_ID("$Id: fld_dup.c,v 1.6 2002/07/06 15:33:27 juergen Exp $")
37
38 /*---------------------------------------------------------------------------
39 |   Facility      :  libnform  
40 |   Function      :  FIELD *dup_field(FIELD *field, int frow, int fcol)
41 |   
42 |   Description   :  Duplicates the field at the specified position. All
43 |                    field attributes and the buffers are copied.
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 NCURSES_EXPORT(FIELD *)
52 dup_field (FIELD * field, int frow, int fcol)
53 {
54   FIELD *New_Field = (FIELD *)0;
55   int err = E_BAD_ARGUMENT;
56
57   if (field && (frow>=0) && (fcol>=0) && 
58       ((err=E_SYSTEM_ERROR) != 0) && /* trick : this resets the default error */
59       (New_Field=(FIELD *)malloc(sizeof(FIELD))) )
60     {
61       *New_Field         = *_nc_Default_Field;
62       New_Field->frow    = frow;
63       New_Field->fcol    = fcol;
64       New_Field->link    = New_Field;
65       New_Field->rows    = field->rows;
66       New_Field->cols    = field->cols;
67       New_Field->nrow    = field->nrow;
68       New_Field->drows   = field->drows;
69       New_Field->dcols   = field->dcols;
70       New_Field->maxgrow = field->maxgrow;
71       New_Field->nbuf    = field->nbuf;
72       New_Field->just    = field->just;
73       New_Field->fore    = field->fore;
74       New_Field->back    = field->back;
75       New_Field->pad     = field->pad;
76       New_Field->opts    = field->opts;
77       New_Field->usrptr  = field->usrptr;
78
79       if (_nc_Copy_Type(New_Field,field))
80         {
81           size_t len;
82
83           len = Total_Buffer_Size(New_Field);
84           if ( (New_Field->buf=(char *)malloc(len)) )
85             {
86               memcpy(New_Field->buf,field->buf,len);
87               return New_Field;
88             }
89         }
90     }
91
92   if (New_Field) 
93     free_field(New_Field);
94
95   SET_ERROR(err);
96   return (FIELD *)0;
97 }
98
99 /* fld_dup.c ends here */