xref: /openbsd-src/lib/libmenu/m_pattern.c (revision a28daedfc357b214be5c701aa8ba8adb29a7f1c2)
1 /*	$OpenBSD: m_pattern.c,v 1.4 2001/01/22 18:02:05 millert Exp $	*/
2 
3 /****************************************************************************
4  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
5  *                                                                          *
6  * Permission is hereby granted, free of charge, to any person obtaining a  *
7  * copy of this software and associated documentation files (the            *
8  * "Software"), to deal in the Software without restriction, including      *
9  * without limitation the rights to use, copy, modify, merge, publish,      *
10  * distribute, distribute with modifications, sublicense, and/or sell       *
11  * copies of the Software, and to permit persons to whom the Software is    *
12  * furnished to do so, subject to the following conditions:                 *
13  *                                                                          *
14  * The above copyright notice and this permission notice shall be included  *
15  * in all copies or substantial portions of the Software.                   *
16  *                                                                          *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24  *                                                                          *
25  * Except as contained in this notice, the name(s) of the above copyright   *
26  * holders shall not be used in advertising or otherwise to promote the     *
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29  ****************************************************************************/
30 
31 /****************************************************************************
32  *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
33  ****************************************************************************/
34 
35 /***************************************************************************
36 * Module m_pattern                                                         *
37 * Pattern matching handling                                                *
38 ***************************************************************************/
39 
40 #include "menu.priv.h"
41 
42 MODULE_ID("$From: m_pattern.c,v 1.6 2000/12/10 02:16:48 tom Exp $")
43 
44 /*---------------------------------------------------------------------------
45 |   Facility      :  libnmenu
46 |   Function      :  char *menu_pattern(const MENU *menu)
47 |
48 |   Description   :  Return the value of the pattern buffer.
49 |
50 |   Return Values :  NULL          - if there is no pattern buffer allocated
51 |                    EmptyString   - if there is a pattern buffer but no
52 |                                    pattern is stored
53 |                    PatternString - as expected
54 +--------------------------------------------------------------------------*/
55 NCURSES_EXPORT(char *)
56 menu_pattern (const MENU * menu)
57 {
58   return (menu ? (menu->pattern ? menu->pattern : "") : (char *)0);
59 }
60 
61 /*---------------------------------------------------------------------------
62 |   Facility      :  libnmenu
63 |   Function      :  int set_menu_pattern(MENU *menu, const char *p)
64 |
65 |   Description   :  Set the match pattern for a menu and position to the
66 |                    first item that matches.
67 |
68 |   Return Values :  E_OK              - success
69 |                    E_BAD_ARGUMENT    - invalid menu or pattern pointer
70 |                    E_NOT_CONNECTED   - no items connected to menu
71 |                    E_BAD_STATE       - menu in user hook routine
72 |                    E_NO_MATCH        - no item matches pattern
73 +--------------------------------------------------------------------------*/
74 NCURSES_EXPORT(int)
75 set_menu_pattern (MENU *menu, const char *p)
76 {
77   ITEM *matchitem;
78   int   matchpos;
79 
80   if (!menu || !p)
81     RETURN(E_BAD_ARGUMENT);
82 
83   if (!(menu->items))
84     RETURN(E_NOT_CONNECTED);
85 
86   if ( menu->status & _IN_DRIVER )
87     RETURN(E_BAD_STATE);
88 
89   Reset_Pattern(menu);
90 
91   if (!(*p))
92     {
93       pos_menu_cursor(menu);
94       RETURN(E_OK);
95     }
96 
97   if (menu->status & _LINK_NEEDED)
98     _nc_Link_Items(menu);
99 
100   matchpos  = menu->toprow;
101   matchitem = menu->curitem;
102   assert(matchitem);
103 
104   while(*p)
105     {
106       if ( !isprint((unsigned char)(*p)) ||
107 	  (_nc_Match_Next_Character_In_Item_Name(menu,*p,&matchitem) != E_OK) )
108 	{
109 	  Reset_Pattern(menu);
110 	  pos_menu_cursor(menu);
111 	  RETURN(E_NO_MATCH);
112 	}
113       p++;
114     }
115 
116   /* This is reached if there was a match. So we position to the new item */
117   Adjust_Current_Item(menu,matchpos,matchitem);
118   RETURN(E_OK);
119 }
120 
121 /* m_pattern.c ends here */
122