contrib/ncurses/form/fld_ftlink.c

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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_ftlink.c,v 1.15 2012/06/10 00:27:49 tom Exp $")
  36
  37 /*---------------------------------------------------------------------------
  38 |   Facility      :  libnform
  39 |   Function      :  FIELDTYPE *link_fieldtype(
  40 |                                FIELDTYPE *type1,
  41 |                                FIELDTYPE *type2)
  42 |
  43 |   Description   :  Create a new fieldtype built from the two given types.
  44 |                    They are connected by an logical 'OR'.
  45 |                    If an error occurs, errno is set to
  46 |                       E_BAD_ARGUMENT  - invalid arguments
  47 |                       E_SYSTEM_ERROR  - system error (no memory)
  48 |
  49 |   Return Values :  Fieldtype pointer or NULL if error occurred.
  50 +--------------------------------------------------------------------------*/
  51 NCURSES_EXPORT(FIELDTYPE *)
  52 link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2)
  53 {
  54   FIELDTYPE *nftyp = (FIELDTYPE *)0;
  55
  56   T((T_CALLED("link_fieldtype(%p,%p)"), (void *)type1, (void *)type2));
  57   if (type1 && type2)
  58     {
  59       nftyp = typeMalloc(FIELDTYPE, 1);
  60
  61       if (nftyp)
  62         {
  63           T((T_CREATE("fieldtype %p"), (void *)nftyp));
  64           *nftyp = *_nc_Default_FieldType;
  65           SetStatus(nftyp, _LINKED_TYPE);
  66           if ((type1->status & _HAS_ARGS) || (type2->status & _HAS_ARGS))
  67             SetStatus(nftyp, _HAS_ARGS);
  68           if ((type1->status & _HAS_CHOICE) || (type2->status & _HAS_CHOICE))
  69             SetStatus(nftyp, _HAS_CHOICE);
  70           nftyp->left = type1;
  71           nftyp->right = type2;
  72           type1->ref++;
  73           type2->ref++;
  74         }
  75       else
  76         {
  77           SET_ERROR(E_SYSTEM_ERROR);
  78         }
  79     }
  80   else
  81     {
  82       SET_ERROR(E_BAD_ARGUMENT);
  83     }
  84   returnFieldType(nftyp);
  85 }
  86
  87 /* fld_ftlink.c ends here */