form/fld_dup.c

   1 /****************************************************************************
   2  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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  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    *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  26  * authorization.                                                           *
  27  ****************************************************************************/
  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 */