form/fld_dup.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
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  11  *                                                                          *
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  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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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 */