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1 | #include <lttv/hook.h> |
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2 | |
3 | |
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4 | typedef struct _LttvHookClosure { |
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5 | lttv_hook hook; |
6 | void *hook_data; |
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7 | } LttvHookClosure; |
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8 | |
9 | |
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10 | LttvHooks *lttv_hooks_new() |
11 | { |
12 | return g_array_new(FALSE, FALSE, sizeof(LttvHookClosure)); |
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13 | } |
14 | |
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15 | |
16 | void lttv_hooks_destroy(LttvHooks *h) |
17 | { |
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18 | g_array_free(h, TRUE); |
19 | } |
20 | |
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21 | |
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22 | void lttv_hooks_add(LttvHooks *h, LttvHook f, void *hook_data) |
23 | { |
24 | LttvHookClosure c; |
25 | |
26 | if(h == NULL)g_error("Null hook added"); |
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27 | |
28 | c.hook = f; |
29 | c.hook_data = hook_data; |
30 | g_array_append_val(h,c); |
31 | } |
32 | |
33 | |
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34 | void lttv_hooks_add_list(LttvHooks *h, LttvHooks *list) |
35 | { |
36 | guint i; |
37 | |
38 | for(i = 0 ; i < list->len; i++) { |
39 | g_array_append_val(h,g_array_index(list, LttvHookClosure, i)); |
40 | } |
41 | } |
42 | |
43 | |
44 | void *lttv_hooks_remove(LttvHooks *h, LttvHook f) |
45 | { |
46 | unsigned i; |
47 | |
48 | void *hook_data; |
49 | |
50 | LttvHookClosure *c; |
51 | |
52 | for(i = 0 ; i < h->len ; i++) { |
53 | c = &g_array_index(h, LttvHookClosure, i); |
54 | if(c->hook == f) { |
55 | hook_data = c->hook_data; |
56 | lttv_hooks_remove_by_position(h, i); |
57 | return hook_data; |
58 | } |
59 | } |
60 | return NULL; |
61 | } |
62 | |
63 | |
64 | void lttv_hooks_remove_data(LttvHooks *h, LttvHook f, void *hook_data) |
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65 | { |
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66 | unsigned i; |
67 | |
68 | LttvHookClosure *c; |
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69 | |
70 | for(i = 0 ; i < h->len ; i++) { |
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71 | c = &g_array_index(h, LttvHookClosure, i); |
72 | if(c->hook == f && c->hook_data == hook_data) { |
73 | lttv_hooks_remove_by_position(h, i); |
74 | return; |
75 | } |
76 | } |
77 | } |
78 | |
79 | |
80 | void lttv_hooks_remove_list(LttvHooks *h, LttvHooks *list) |
81 | { |
82 | guint i, j; |
83 | |
84 | LttvHookClosure *c, *c_list; |
85 | |
86 | for(i = 0, j = 0 ; i < h->len && j < list->len ;) { |
87 | c = &g_array_index(h, LttvHookClosure, i); |
88 | c_list = &g_array_index(list, LttvHookClosure, j); |
89 | if(c->hook == c_list->hook && c->hook_data == c_list->hook_data) { |
90 | lttv_hooks_remove_by_position(h, i); |
91 | j++; |
92 | } |
93 | else i++; |
94 | } |
95 | |
96 | /* Normally the hooks in h are ordered as in list. If this is not the case, |
97 | try harder here. */ |
98 | |
99 | if(j < list->len) { |
100 | for(; j < list->len ; j++) { |
101 | c_list = &g_array_index(list, LttvHookClosure, j); |
102 | lttv_hooks_remove_data(h, c_list->hook, c_list->hook_data); |
103 | } |
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104 | } |
105 | } |
106 | |
107 | |
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108 | unsigned lttv_hooks_number(LttvHooks *h) |
109 | { |
110 | return h->len; |
111 | } |
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112 | |
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113 | |
114 | void lttv_hooks_get(LttvHooks *h, unsigned i, LttvHook *f, void **hook_data) |
115 | { |
116 | LttvHookClosure *c; |
117 | |
118 | c = &g_array_index(h, LttvHookClosure, i); |
119 | *f = c->hook; |
120 | *hook_data = c->hook_data; |
121 | } |
122 | |
123 | |
124 | void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i); |
125 | { |
126 | g_array_remove_index(h, i) |
127 | } |
128 | |
129 | |
130 | gboolean lttv_hooks_call(LttvHooks *h, void *call_data) |
131 | { |
132 | gboolean ret = FALSE; |
133 | |
134 | LttvHookClosure *c; |
135 | |
136 | if(h != NULL) { |
137 | for(i = 0 ; i < h->len ; i++) { |
138 | c = &g_array_index(h, LttvHookClosure, i); |
139 | ret = ret || c->hook(c->hook_data,call_data); |
140 | } |
141 | } |
142 | return ret; |
143 | } |
144 | |
145 | |
146 | gboolean lttv_hooks_call_check(LttvHooks *h, void *call_data) |
147 | { |
148 | LttvHookClosure *c; |
149 | |
150 | for(i = 0 ; i < h->len ; i++) { |
151 | c = &g_array_index(h, LttvHookClosure, i); |
152 | if(c->hook(c->hook_data,call_data)) return TRUE; |
153 | } |
154 | return FALSE; |
155 | } |
156 | |
157 | |
158 | LttvHooksById *lttv_hooks_by_id_new() |
159 | { |
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160 | return g_ptr_array_new(); |
161 | } |
162 | |
163 | |
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164 | void lttv_hooks_by_id_destroy(LttvHooksById *h) |
165 | { |
166 | guint i; |
167 | |
168 | for(i = 0 ; i < h->len ; i++) { |
169 | if(h->pdata[i] != NULL) lttv_hooks_destroy((LttvHooks *)(h->pdata[i])); |
170 | } |
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171 | g_ptr_array_free(h, TRUE); |
172 | } |
173 | |
174 | |
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175 | LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id); |
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176 | { |
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177 | if(h->len <= id) g_ptr_array_set_size(h, id + 1); |
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178 | if(h->pdata[id] == NULL) h->pdata[id] = lttv_hooks_new(); |
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179 | return h->pdata[id]; |
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180 | } |
181 | |
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182 | |
183 | unsigned lttv_hooks_by_id_max_id(LttvHooksById *h) |
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184 | { |
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185 | return h->len; |
186 | } |
187 | |
188 | |
189 | LttvHooks *lttv_hooks_by_id_get(LttvHooksById *h, unsigned id) |
190 | { |
191 | if(id < h->len) return h->pdata[id]; |
192 | return NULL; |
193 | } |
194 | |
195 | |
196 | void lttv_hooks_by_id_remove(LttvHooksById *h, unsigned id) |
197 | { |
198 | if(id < h->len && h->pdata[id] != NULL) { |
199 | lttv_hooks_destroy((LttvHooks *)h->pdata[id]); |
200 | h->pdata[id] = NULL; |
201 | } |
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202 | } |
203 | |