contrib/ncurses-5.4/menu/m_new.c

   1 /****************************************************************************
   2  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_new                                                             *
  35 * Creation and destruction of new menus                                    *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_new.c,v 1.13 2003/10/25 14:54:48 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  MENU *new_menu(ITEM **items)
  45 |
  46 |   Description   :  Creates a new menu connected to the item pointer
  47 |                    array items and returns a pointer to the new menu.
  48 |                    The new menu is initialized with the values from the
  49 |                    default menu.
  50 |
  51 |   Return Values :  NULL on error
  52 +--------------------------------------------------------------------------*/
  53 NCURSES_EXPORT(MENU *)
  54 new_menu (ITEM ** items)
  55 {
  56   MENU *menu = (MENU *)calloc(1,sizeof(MENU));
  57
  58   if (menu)
  59     {
  60       *menu = _nc_Default_Menu;
  61       menu->status = 0;
  62       menu->rows = menu->frows;
  63       menu->cols = menu->fcols;
  64       if (items && *items)
  65         {
  66           if (!_nc_Connect_Items(menu,items))
  67             {
  68               free(menu);
  69               menu = (MENU *)0;
  70             }
  71         }
  72     }
  73
  74   if (!menu)
  75     SET_ERROR(E_SYSTEM_ERROR);
  76
  77   return(menu);
  78 }
  79
  80 /*---------------------------------------------------------------------------
  81 |   Facility      :  libnmenu
  82 |   Function      :  int free_menu(MENU *menu)
  83 |
  84 |   Description   :  Disconnects menu from its associated item pointer
  85 |                    array and frees the storage allocated for the menu.
  86 |
  87 |   Return Values :  E_OK               - success
  88 |                    E_BAD_ARGUMENT     - Invalid menu pointer passed
  89 |                    E_POSTED           - Menu is already posted
  90 +--------------------------------------------------------------------------*/
  91 NCURSES_EXPORT(int)
  92 free_menu (MENU * menu)
  93 {
  94   if (!menu)
  95     RETURN(E_BAD_ARGUMENT);
  96
  97   if ( menu->status & _POSTED )
  98     RETURN(E_POSTED);
  99
 100   if (menu->items)
 101     _nc_Disconnect_Items(menu);
 102
 103   if ((menu->status & _MARK_ALLOCATED) && menu->mark)
 104     free(menu->mark);
 105
 106   free(menu);
 107   RETURN(E_OK);
 108 }
 109
 110 /* m_new.c ends here */