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64b56afd AC |
1 | /* |
2 | * Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>. | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice is present in all copies. | |
7 | * | |
8 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
9 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
10 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
11 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
12 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
13 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
14 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
15 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
16 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
17 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
18 | * POSSIBILITY OF SUCH DAMAGE. | |
19 | */ | |
20 | ||
21 | #include "stdinc.h" | |
22 | #include "capability.h" | |
23 | #include "irc_dictionary.h" | |
24 | ||
25 | struct CapabilityIndex { | |
26 | struct Dictionary *cap_dict; | |
27 | unsigned int highest_bit; | |
28 | }; | |
29 | ||
30 | struct CapabilityEntry { | |
31 | unsigned int orphaned; | |
32 | unsigned int value; | |
33 | }; | |
34 | ||
35 | unsigned int | |
36 | capability_get(struct CapabilityIndex *index, const char *cap) | |
37 | { | |
38 | struct CapabilityEntry *entry; | |
39 | ||
40 | s_assert(index != NULL); | |
41 | ||
42 | entry = irc_dictionary_retrieve(index->cap_dict, cap); | |
43 | if (entry != NULL && !entry->orphaned) | |
44 | return entry->value; | |
45 | ||
46 | return 0xFFFFFFFF; | |
47 | } | |
48 | ||
49 | unsigned int | |
50 | capability_put(struct CapabilityIndex *index, const char *cap) | |
51 | { | |
52 | struct CapabilityEntry *entry; | |
53 | ||
54 | s_assert(index != NULL); | |
55 | ||
56 | if ((entry = irc_dictionary_retrieve(index->cap_dict, cap)) != NULL) | |
57 | { | |
58 | entry->orphaned = 0; | |
59 | return entry->value; | |
60 | } | |
61 | ||
62 | entry = rb_malloc(sizeof(struct CapabilityEntry)); | |
63 | entry->orphaned = 0; | |
64 | entry->value = index->highest_bit; | |
65 | ||
66 | irc_dictionary_add(index->cap_dict, cap, entry); | |
67 | ||
68 | index->highest_bit <<= 1; | |
69 | ||
70 | /* hmm... not sure what to do here, so i guess we will abort for now... --nenolod */ | |
71 | if (index->highest_bit == 0) | |
72 | abort(); | |
73 | ||
74 | return entry->value; | |
75 | } | |
76 | ||
77 | void | |
78 | capability_orphan(struct CapabilityIndex *index, const char *cap) | |
79 | { | |
80 | struct CapabilityEntry *entry; | |
81 | ||
82 | s_assert(index != NULL); | |
83 | ||
84 | entry = irc_dictionary_retrieve(index->cap_dict, cap); | |
85 | if (entry != NULL) | |
86 | entry->orphaned = 1; | |
87 | } | |
88 | ||
89 | static void | |
90 | capability_destroy(struct DictionaryElement *delem, void *privdata) | |
91 | { | |
92 | s_assert(delem != NULL); | |
93 | ||
94 | rb_free(delem->data); | |
95 | } | |
96 | ||
97 | struct CapabilityIndex * | |
98 | capability_index_create(void) | |
99 | { | |
100 | struct CapabilityIndex *index; | |
101 | ||
102 | index = rb_malloc(sizeof(struct CapabilityIndex)); | |
103 | index->cap_dict = irc_dictionary_create(strcasecmp); | |
104 | index->highest_bit = 1; | |
105 | ||
106 | return index; | |
107 | } | |
108 | ||
109 | void | |
110 | capability_index_destroy(struct CapabilityIndex *index) | |
111 | { | |
112 | s_assert(index != NULL); | |
113 | ||
114 | irc_dictionary_destroy(index->cap_dict, capability_destroy, NULL); | |
115 | rb_free(index); | |
116 | } | |
5e773521 AC |
117 | |
118 | const char * | |
119 | capability_index_list(struct CapabilityIndex *index, unsigned int cap_mask) | |
120 | { | |
121 | struct DictionaryIter iter; | |
122 | struct CapabilityEntry *entry; | |
123 | static char buf[BUFSIZE]; | |
124 | char *t = buf; | |
125 | int tl; | |
126 | ||
127 | s_assert(index != NULL); | |
128 | ||
129 | *t = '\0'; | |
130 | ||
131 | DICTIONARY_FOREACH(entry, &iter, index->cap_dict) | |
132 | { | |
133 | if (entry->value & cap_mask) | |
134 | { | |
135 | tl = rb_sprintf(t, "%s ", iter.cur->key); | |
136 | t += tl; | |
137 | } | |
138 | } | |
139 | ||
140 | t--; | |
141 | *t = '\0'; | |
142 | ||
143 | return buf; | |
144 | } | |
ec3a9055 AC |
145 | |
146 | unsigned int | |
147 | capability_index_mask(struct CapabilityIndex *index) | |
148 | { | |
149 | struct DictionaryIter iter; | |
150 | struct CapabilityEntry *entry; | |
151 | unsigned int mask = 0; | |
152 | ||
153 | s_assert(index != NULL); | |
154 | ||
155 | DICTIONARY_FOREACH(entry, &iter, index->cap_dict) | |
156 | { | |
157 | if (!entry->orphaned) | |
158 | mask |= entry->value; | |
159 | } | |
160 | ||
161 | return mask; | |
162 | } |