1 | // =============================================================== // |
---|
2 | // // |
---|
3 | // File : ad_hcb.h // |
---|
4 | // Purpose : hierarchical callbacks // |
---|
5 | // // |
---|
6 | // Coded by Ralf Westram (coder@reallysoft.de) in January 2014 // |
---|
7 | // Institute of Microbiology (Technical University Munich) // |
---|
8 | // http://www.arb-home.de/ // |
---|
9 | // // |
---|
10 | // =============================================================== // |
---|
11 | |
---|
12 | #ifndef AD_HCB_H |
---|
13 | #define AD_HCB_H |
---|
14 | |
---|
15 | #ifndef ARBDB_BASE_H |
---|
16 | #include "arbdb_base.h" |
---|
17 | #endif |
---|
18 | #ifndef GB_LOCAL_H |
---|
19 | #include "gb_local.h" |
---|
20 | #endif |
---|
21 | #ifndef GB_KEY_H |
---|
22 | #include "gb_key.h" |
---|
23 | #endif |
---|
24 | |
---|
25 | // -------------------------------- |
---|
26 | // hierarchical callbacks |
---|
27 | |
---|
28 | |
---|
29 | /*! Stores path to a specific location in DB hierarchy as list of GBQUARKs |
---|
30 | */ |
---|
31 | class gb_hierarchy_location { |
---|
32 | static const int MAX_HIERARCHY_DEPTH = 10; // no real limit, just avoids dynamic allocation |
---|
33 | GBQUARK quark[MAX_HIERARCHY_DEPTH]; |
---|
34 | |
---|
35 | public: |
---|
36 | gb_hierarchy_location(GBDATA *gbd) { |
---|
37 | for (int offset = 0; gbd; ++offset) { |
---|
38 | gb_assert(offset<MAX_HIERARCHY_DEPTH); // increase MAX_HIERARCHY_DEPTH (or use dynamic mem) |
---|
39 | quark[offset] = GB_KEY_QUARK(gbd); |
---|
40 | if (!quark[offset]) return; |
---|
41 | |
---|
42 | gbd = gbd->get_father(); |
---|
43 | } |
---|
44 | gb_assert(0); // did not reach DB-root (invalid entry?) |
---|
45 | } |
---|
46 | |
---|
47 | bool matches(GBDATA *gbd) const { |
---|
48 | //! return true if 'gbd' is at 'this' hierarchy location |
---|
49 | for (int offset = 0; gbd; ++offset) { |
---|
50 | GBQUARK q = GB_KEY_QUARK(gbd); |
---|
51 | if (!quark[offset]) return !q; |
---|
52 | if (q != quark[offset]) return false; |
---|
53 | |
---|
54 | gbd = gbd->get_father(); |
---|
55 | } |
---|
56 | |
---|
57 | gb_assert(0); |
---|
58 | return false; |
---|
59 | } |
---|
60 | }; |
---|
61 | |
---|
62 | class gb_hierarchy_callback : public gb_callback { |
---|
63 | gb_hierarchy_location loc; |
---|
64 | public: |
---|
65 | gb_hierarchy_callback(const TypedDatabaseCallback& spec_, GBDATA *gbd_representative) |
---|
66 | : gb_callback(spec_), |
---|
67 | loc(gbd_representative) |
---|
68 | {} |
---|
69 | |
---|
70 | bool triggered_by(GBDATA *gbd) const { return loc.matches(gbd); } |
---|
71 | }; |
---|
72 | |
---|
73 | struct gb_hierarchy_callback_list : public CallbackList<gb_hierarchy_callback> { |
---|
74 | // need forward decl for gb_hierarchy_callback_list, i.e. cant use a simple typedef here |
---|
75 | }; |
---|
76 | |
---|
77 | #else |
---|
78 | #error ad_hcb.h included twice |
---|
79 | #endif // AD_HCB_H |
---|