ncurses 5.4
[ncurses.git] / form / fld_dup.c
1 /****************************************************************************
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28
29 /****************************************************************************
30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
31  ****************************************************************************/
32
33 #include "form.priv.h"
34
35 MODULE_ID("$Id: fld_dup.c,v 1.7 2003/10/25 15:17:08 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   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    = New_Field;
64       New_Field->rows    = field->rows;
65       New_Field->cols    = field->cols;
66       New_Field->nrow    = field->nrow;
67       New_Field->drows   = field->drows;
68       New_Field->dcols   = field->dcols;
69       New_Field->maxgrow = field->maxgrow;
70       New_Field->nbuf    = field->nbuf;
71       New_Field->just    = field->just;
72       New_Field->fore    = field->fore;
73       New_Field->back    = field->back;
74       New_Field->pad     = field->pad;
75       New_Field->opts    = field->opts;
76       New_Field->usrptr  = field->usrptr;
77
78       if (_nc_Copy_Type(New_Field,field))
79         {
80           size_t len;
81
82           len = Total_Buffer_Size(New_Field);
83           if ( (New_Field->buf=(char *)malloc(len)) )
84             {
85               memcpy(New_Field->buf,field->buf,len);
86               return New_Field;
87             }
88         }
89     }
90
91   if (New_Field) 
92     free_field(New_Field);
93
94   SET_ERROR(err);
95   return (FIELD *)0;
96 }
97
98 /* fld_dup.c ends here */