form/fld_dup.c

   1 /****************************************************************************
   2  * Copyright 2020 Thomas E. Dickey                                          *
   3  * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
   4  *                                                                          *
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  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  *                                                                          *
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  14  * in all copies or substantial portions of the Software.                   *
  15  *                                                                          *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  26  * sale, use or other dealings in this Software without prior written       *
  27  * authorization.                                                           *
  28  ****************************************************************************/
  29
  30 /****************************************************************************
  31  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  32  ****************************************************************************/
  33
  34 #include "form.priv.h"
  35
  36 MODULE_ID("$Id: fld_dup.c,v 1.17 2020/03/29 00:39:41 tom 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   T((T_CALLED("dup_field(%p,%d,%d)"), (void *)field, frow, fcol));
  58   if (field && (frow >= 0) && (fcol >= 0) &&
  59       ((err = E_SYSTEM_ERROR) != 0) &&  /* trick : this resets the default error */
  60       (New_Field = typeMalloc(FIELD, 1)))
  61     {
  62       T((T_CREATE("field %p"), (void *)New_Field));
  63       *New_Field = *_nc_Default_Field;
  64       New_Field->frow = (short)frow;
  65       New_Field->fcol = (short)fcol;
  66       New_Field->link = New_Field;
  67       New_Field->rows = field->rows;
  68       New_Field->cols = field->cols;
  69       New_Field->nrow = field->nrow;
  70       New_Field->drows = field->drows;
  71       New_Field->dcols = field->dcols;
  72       New_Field->maxgrow = field->maxgrow;
  73       New_Field->nbuf = field->nbuf;
  74       New_Field->just = field->just;
  75       New_Field->fore = field->fore;
  76       New_Field->back = field->back;
  77       New_Field->pad = field->pad;
  78       New_Field->opts = field->opts;
  79       New_Field->usrptr = field->usrptr;
  80
  81       if (_nc_Copy_Type(New_Field, field))
  82         {
  83           size_t len;
  84
  85           len = Total_Buffer_Size(New_Field);
  86           if ((New_Field->buf = (FIELD_CELL *)malloc(len * 20)))
  87             {
  88               memcpy(New_Field->buf, field->buf, len);
  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 */