m_pattern.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_pattern                                                         *
35* Pattern matching handling                                                *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_pattern.c,v 1.4 1999/05/16 17:27:28 juergen Exp $")
41
42/*---------------------------------------------------------------------------
43|   Facility      :  libnmenu
44|   Function      :  char *menu_pattern(const MENU *menu)
45|
46|   Description   :  Return the value of the pattern buffer.
47|
48|   Return Values :  NULL          - if there is no pattern buffer allocated
49|                    EmptyString   - if there is a pattern buffer but no
50|                                    pattern is stored
51|                    PatternString - as expected
52+--------------------------------------------------------------------------*/
53char *menu_pattern(const MENU * menu)
54{
55  return (menu ? (menu->pattern ? menu->pattern : "") : (char *)0);
56}
57
58/*---------------------------------------------------------------------------
59|   Facility      :  libnmenu
60|   Function      :  int set_menu_pattern(MENU *menu, const char *p)
61|
62|   Description   :  Set the match pattern for a menu and position to the
63|                    first item that matches.
64|
65|   Return Values :  E_OK              - success
66|                    E_BAD_ARGUMENT    - invalid menu or pattern pointer
67|                    E_NOT_CONNECTED   - no items connected to menu
68|                    E_BAD_STATE       - menu in user hook routine
69|                    E_NO_MATCH        - no item matches pattern
70+--------------------------------------------------------------------------*/
71int set_menu_pattern(MENU *menu, const char *p)
72{
73  ITEM *matchitem;
74  int   matchpos;
75
76  if (!menu || !p)
77    RETURN(E_BAD_ARGUMENT);
78
79  if (!(menu->items))
80    RETURN(E_NOT_CONNECTED);
81
82  if ( menu->status & _IN_DRIVER )
83    RETURN(E_BAD_STATE);
84
85  Reset_Pattern(menu);
86
87  if (!(*p))
88    {
89      pos_menu_cursor(menu);
90      RETURN(E_OK);
91    }
92
93  if (menu->status & _LINK_NEEDED)
94    _nc_Link_Items(menu);
95
96  matchpos  = menu->toprow;
97  matchitem = menu->curitem;
98  assert(matchitem);
99
100  while(*p)
101    {
102      if ( !isprint(*p) ||
103	  (_nc_Match_Next_Character_In_Item_Name(menu,*p,&matchitem) != E_OK) )
104	{
105	  Reset_Pattern(menu);
106	  pos_menu_cursor(menu);
107	  RETURN(E_NO_MATCH);
108	}
109      p++;
110    }
111
112  /* This is reached if there was a match. So we position to the new item */
113  Adjust_Current_Item(menu,matchpos,matchitem);
114  RETURN(E_OK);
115}
116
117/* m_pattern.c ends here */
118