/* $OpenBSD: m_item_new.c,v 1.3 1997/12/03 05:31:20 millert Exp $ */ /*-----------------------------------------------------------------------------+ | The ncurses menu library is Copyright (C) 1995-1997 | | by Juergen Pfeifer | | All Rights Reserved. | | | | Permission to use, copy, modify, and distribute this software and its | | documentation for any purpose and without fee is hereby granted, provided | | that the above copyright notice appear in all copies and that both that | | copyright notice and this permission notice appear in supporting | | documentation, and that the name of the above listed copyright holder(s) not | | be used in advertising or publicity pertaining to distribution of the | | software without specific, written prior permission. | | | | THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD TO | | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT- | | NESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR | | ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RE- | | SULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, | | NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH | | THE USE OR PERFORMANCE OF THIS SOFTWARE. | +-----------------------------------------------------------------------------*/ /*************************************************************************** * Module m_item_new * * Create and destroy menu items * * Set and get marker string for menu * ***************************************************************************/ #include "menu.priv.h" MODULE_ID("Id: m_item_new.c,v 1.7 1997/10/21 08:44:31 juergen Exp $") /*--------------------------------------------------------------------------- | Facility : libnmenu | Function : bool Is_Printable_String(const char *s) | | Description : Checks whether or not the string contains only printable | characters. | | Return Values : TRUE - if string is printable | FALSE - if string contains non-printable characters +--------------------------------------------------------------------------*/ static bool Is_Printable_String(const char *s) { assert(s); while(*s) { if (!isprint((unsigned char)*s)) return FALSE; s++; } return TRUE; } /*--------------------------------------------------------------------------- | Facility : libnmenu | Function : ITEM *new_item(char *name, char *description) | | Description : Create a new item with name and description. Return | a pointer to this new item. | N.B.: an item must(!) have a name. | | Return Values : The item pointer or NULL if creation failed. +--------------------------------------------------------------------------*/ ITEM *new_item(const char *name, const char *description) { ITEM *item; if ( !name || (*name == '\0') || !Is_Printable_String(name) ) { item = (ITEM *)0; SET_ERROR( E_BAD_ARGUMENT ); } else { item = (ITEM *)calloc(1,sizeof(ITEM)); if (item) { *item = _nc_Default_Item; /* hope we have struct assignment */ item->name.length = strlen(name); item->name.str = name; if (description && (*description != '\0') && Is_Printable_String(description)) { item->description.length = strlen(description); item->description.str = description; } else { item->description.length = 0; item->description.str = (char *)0; } } else SET_ERROR( E_SYSTEM_ERROR ); } return(item); } /*--------------------------------------------------------------------------- | Facility : libnmenu | Function : int free_item(ITEM *item) | | Description : Free the allocated storage for this item. | N.B.: a connected item can't be freed. | | Return Values : E_OK - success | E_BAD_ARGUMENT - invalid value has been passed | E_CONNECTED - item is still connected to a menu +--------------------------------------------------------------------------*/ int free_item(ITEM * item) { if (!item) RETURN( E_BAD_ARGUMENT ); if (item->imenu) RETURN( E_CONNECTED ); free(item); RETURN( E_OK ); } /*--------------------------------------------------------------------------- | Facility : libnmenu | Function : int set_menu_mark( MENU *menu, const char *mark ) | | Description : Set the mark string used to indicate the current | item (single-valued menu) or the selected items | (multi-valued menu). | The mark argument may be NULL, in which case no | marker is used. | This might be a little bit tricky, because this may | affect the geometry of the menu, which we don't allow | if it is already posted. | | Return Values : E_OK - success | E_BAD_ARGUMENT - an invalid value has been passed | E_SYSTEM_ERROR - no memory to store mark +--------------------------------------------------------------------------*/ int set_menu_mark(MENU * menu, const char * mark) { int l; if ( mark && (*mark != '\0') && Is_Printable_String(mark) ) l = strlen(mark); else l = 0; if ( menu ) { char *old_mark = menu->mark; unsigned short old_status = menu->status; if (menu->status & _POSTED) { /* If the menu is already posted, the geometry is fixed. Then we can only accept a mark with exactly the same length */ if (menu->marklen != l) RETURN(E_BAD_ARGUMENT); } menu->marklen = l; if (l) { menu->mark = (char *)malloc(l+1); if (menu->mark) { strcpy(menu->mark, mark); menu->status |= _MARK_ALLOCATED; } else { menu->mark = old_mark; RETURN(E_SYSTEM_ERROR); } } else menu->mark = (char *)0; if ((old_status & _MARK_ALLOCATED) && old_mark) free(old_mark); if (menu->status & _POSTED) { _nc_Draw_Menu( menu ); _nc_Show_Menu( menu ); } else { /* Recalculate the geometry */ _nc_Calculate_Item_Length_and_Width( menu ); } } else { return set_menu_mark(&_nc_Default_Menu, mark); } RETURN(E_OK); } /*--------------------------------------------------------------------------- | Facility : libnmenu | Function : char *menu_mark(const MENU *menu) | | Description : Return a pointer to the marker string | | Return Values : The marker string pointer or NULL if no marker defined +--------------------------------------------------------------------------*/ const char *menu_mark(const MENU * menu) { return Normalize_Menu( menu )->mark; } /* m_item_new.c */