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ddc8de03 | 1 | /* Callback management. |
99dee823 | 2 | Copyright (C) 2014-2021 Free Software Foundation, Inc. |
ddc8de03 PM |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <cc1plugin-config.h> | |
21 | #include <string.h> | |
22 | #include <stdlib.h> | |
23 | #include "callbacks.hh" | |
24 | #include "libiberty.h" | |
25 | ||
26 | // An entry in the hash table. | |
27 | struct method | |
28 | { | |
29 | const char *name; | |
30 | cc1_plugin::callback_ftype *func; | |
31 | }; | |
32 | ||
33 | // Hash function for struct method. | |
34 | static hashval_t | |
35 | hash_method (const void *a) | |
36 | { | |
37 | const struct method *m = (const struct method *) a; | |
38 | ||
39 | return htab_hash_string (m->name); | |
40 | } | |
41 | ||
42 | // Equality function for struct method. | |
43 | static int | |
44 | eq_method (const void *a, const void *b) | |
45 | { | |
46 | const struct method *ma = (const struct method *) a; | |
47 | const struct method *mb = (const struct method *) b; | |
48 | ||
49 | return strcmp (ma->name, mb->name) == 0; | |
50 | } | |
51 | ||
52 | cc1_plugin::callbacks::callbacks () | |
53 | : m_registry (htab_create_alloc (10, hash_method, eq_method, | |
54 | free, xcalloc, free)) | |
55 | { | |
56 | } | |
57 | ||
58 | cc1_plugin::callbacks::~callbacks () | |
59 | { | |
60 | htab_delete (m_registry); | |
61 | } | |
62 | ||
63 | void | |
64 | cc1_plugin::callbacks::add_callback (const char *name, | |
65 | cc1_plugin::callback_ftype *func) | |
66 | { | |
67 | method m; | |
68 | method **slot; | |
69 | ||
70 | m.name = name; | |
71 | m.func = func; | |
72 | ||
73 | slot = (method **) htab_find_slot (m_registry, &m, INSERT); | |
74 | *slot = XNEW (method); | |
75 | **slot = m; | |
76 | } | |
77 | ||
78 | cc1_plugin::callback_ftype * | |
79 | cc1_plugin::callbacks::find_callback (const char *name) | |
80 | { | |
81 | method m, *found; | |
82 | ||
83 | m.name = name; | |
84 | ||
85 | found = (method *) htab_find (m_registry, &m); | |
86 | if (found == NULL) | |
87 | return NULL; | |
88 | ||
89 | return found->func; | |
90 | } |