xref: /PHP-7.2/ext/mbstring/oniguruma/src/regtrav.c (revision 2a76d228)
1 /**********************************************************************
2   regtrav.c -  Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5  * Copyright (c) 2002-2004  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #include "regint.h"
31 
32 #ifdef USE_CAPTURE_HISTORY
33 
34 static int
capture_tree_traverse(OnigCaptureTreeNode * node,int at,int (* callback_func)(int,int,int,int,int,void *),int level,void * arg)35 capture_tree_traverse(OnigCaptureTreeNode* node, int at,
36                       int(*callback_func)(int,int,int,int,int,void*),
37                       int level, void* arg)
38 {
39   int r, i;
40 
41   if (node == (OnigCaptureTreeNode* )0)
42     return 0;
43 
44   if ((at & ONIG_TRAVERSE_CALLBACK_AT_FIRST) != 0) {
45     r = (*callback_func)(node->group, node->beg, node->end,
46                          level, ONIG_TRAVERSE_CALLBACK_AT_FIRST, arg);
47     if (r != 0) return r;
48   }
49 
50   for (i = 0; i < node->num_childs; i++) {
51     r = capture_tree_traverse(node->childs[i], at,
52                               callback_func, level + 1, arg);
53     if (r != 0) return r;
54   }
55 
56   if ((at & ONIG_TRAVERSE_CALLBACK_AT_LAST) != 0) {
57     r = (*callback_func)(node->group, node->beg, node->end,
58                          level, ONIG_TRAVERSE_CALLBACK_AT_LAST, arg);
59     if (r != 0) return r;
60   }
61 
62   return 0;
63 }
64 #endif /* USE_CAPTURE_HISTORY */
65 
66 extern int
onig_capture_tree_traverse(OnigRegion * region,int at,int (* callback_func)(int,int,int,int,int,void *),void * arg)67 onig_capture_tree_traverse(OnigRegion* region, int at,
68                   int(*callback_func)(int,int,int,int,int,void*), void* arg)
69 {
70 #ifdef USE_CAPTURE_HISTORY
71   return capture_tree_traverse(region->history_root, at,
72                                callback_func, 0, arg);
73 #else
74   return ONIG_NO_SUPPORT_CONFIG;
75 #endif
76 }
77