contrib/ncurses/menu/m_new.c

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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 1.21 2010/01/23 21:20:11 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  MENU* _nc_new_menu(SCREEN*, 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 NCURSES_SP_NAME(new_menu) (NCURSES_SP_DCLx ITEM ** items)
  55 {
  56   int err = E_SYSTEM_ERROR;
  57   MENU *menu = typeCalloc(MENU, 1);
  58
  59   T((T_CALLED("new_menu(%p,%p)"), (void *)SP_PARM, (void *)items));
  60   if (menu)
  61     {
  62       *menu = _nc_Default_Menu;
  63       menu->status = 0;
  64       menu->rows = menu->frows;
  65       menu->cols = menu->fcols;
  66 #if NCURSES_SP_FUNCS
  67       /* This ensures userwin and usersub are always non-null,
  68          so we can derive always the SCREEN that this menu is
  69          running on. */
  70       menu->userwin = SP_PARM->_stdscr;
  71       menu->usersub = SP_PARM->_stdscr;
  72 #endif
  73       if (items && *items)
  74         {
  75           if (!_nc_Connect_Items(menu, items))
  76             {
  77               err = E_NOT_CONNECTED;
  78               free(menu);
  79               menu = (MENU *) 0;
  80             }
  81           else
  82             err = E_OK;
  83         }
  84     }
  85
  86   if (!menu)
  87     SET_ERROR(err);
  88
  89   returnMenu(menu);
  90 }
  91
  92 /*---------------------------------------------------------------------------
  93 |   Facility      :  libnmenu
  94 |   Function      :  MENU *new_menu(ITEM **items)
  95 |
  96 |   Description   :  Creates a new menu connected to the item pointer
  97 |                    array items and returns a pointer to the new menu.
  98 |                    The new menu is initialized with the values from the
  99 |                    default menu.
 100 |
 101 |   Return Values :  NULL on error
 102 +--------------------------------------------------------------------------*/
 103 #if NCURSES_SP_FUNCS
 104 NCURSES_EXPORT(MENU *)
 105 new_menu(ITEM ** items)
 106 {
 107   return NCURSES_SP_NAME(new_menu) (CURRENT_SCREEN, items);
 108 }
 109 #endif
 110
 111 /*---------------------------------------------------------------------------
 112 |   Facility      :  libnmenu
 113 |   Function      :  int free_menu(MENU *menu)
 114 |
 115 |   Description   :  Disconnects menu from its associated item pointer
 116 |                    array and frees the storage allocated for the menu.
 117 |
 118 |   Return Values :  E_OK               - success
 119 |                    E_BAD_ARGUMENT     - Invalid menu pointer passed
 120 |                    E_POSTED           - Menu is already posted
 121 +--------------------------------------------------------------------------*/
 122 NCURSES_EXPORT(int)
 123 free_menu(MENU * menu)
 124 {
 125   T((T_CALLED("free_menu(%p)"), (void *)menu));
 126   if (!menu)
 127     RETURN(E_BAD_ARGUMENT);
 128
 129   if (menu->status & _POSTED)
 130     RETURN(E_POSTED);
 131
 132   if (menu->items)
 133     _nc_Disconnect_Items(menu);
 134
 135   if ((menu->status & _MARK_ALLOCATED) && menu->mark)
 136     free(menu->mark);
 137
 138   free(menu);
 139   RETURN(E_OK);
 140 }
 141
 142 /* m_new.c ends here */