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| Current File : //usr/src/contrib/ncurses/menu/m_item_new.c |
/****************************************************************************
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/****************************************************************************
* Author: Juergen Pfeifer, 1995,1997 *
****************************************************************************/
/***************************************************************************
* Module m_item_new *
* Create and destroy menu items *
* Set and get marker string for menu *
***************************************************************************/
#include "menu.priv.h"
#if USE_WIDEC_SUPPORT
#if HAVE_WCTYPE_H
#include <wctype.h>
#endif
#endif
MODULE_ID("$Id: m_item_new.c,v 1.27 2006/12/17 19:47:09 tom 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)
{
int result = TRUE;
#if USE_WIDEC_SUPPORT
int count = mbstowcs(0, s, 0);
wchar_t *temp = 0;
assert(s);
if (count > 0
&& (temp = typeCalloc(wchar_t, (2 + (unsigned)count))) != 0)
{
int n;
mbstowcs(temp, s, (unsigned)count);
for (n = 0; n < count; ++n)
if (!iswprint((wint_t) temp[n]))
{
result = FALSE;
break;
}
free(temp);
}
#else
assert(s);
while (*s)
{
if (!isprint(UChar(*s)))
{
result = FALSE;
break;
}
s++;
}
#endif
return result;
}
/*---------------------------------------------------------------------------
| 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.
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(ITEM *)
new_item(const char *name, const char *description)
{
ITEM *item;
T((T_CALLED("new_item(\"%s\", \"%s\")"),
name ? name : "",
description ? description : ""));
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);
}
returnItem(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
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
free_item(ITEM * item)
{
T((T_CALLED("free_item(%p)"), 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
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_menu_mark(MENU * menu, const char *mark)
{
unsigned l;
T((T_CALLED("set_menu_mark(%p,%s)"), menu, _nc_visbuf(mark)));
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 != (int)l)
RETURN(E_BAD_ARGUMENT);
}
menu->marklen = l;
if (l)
{
menu->mark = (char *)malloc(l + 1);
if (menu->mark)
{
strcpy(menu->mark, mark);
if (menu != &_nc_Default_Menu)
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
{
returnCode(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
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(const char *)
menu_mark(const MENU * menu)
{
T((T_CALLED("menu_mark(%p)"), menu));
returnPtr(Normalize_Menu(menu)->mark);
}
/* m_item_new.c */