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1 | |
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2 | #include <lttv/hook.h> |
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3 | |
4 | |
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5 | typedef struct _LttvHookClosure { |
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6 | LttvHook hook; |
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7 | void *hook_data; |
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8 | } LttvHookClosure; |
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9 | |
10 | |
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11 | LttvHooks *lttv_hooks_new() |
12 | { |
13 | return g_array_new(FALSE, FALSE, sizeof(LttvHookClosure)); |
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14 | } |
15 | |
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16 | |
17 | void lttv_hooks_destroy(LttvHooks *h) |
18 | { |
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19 | g_array_free(h, TRUE); |
20 | } |
21 | |
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22 | |
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23 | void lttv_hooks_add(LttvHooks *h, LttvHook f, void *hook_data) |
24 | { |
25 | LttvHookClosure c; |
26 | |
27 | if(h == NULL)g_error("Null hook added"); |
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28 | |
29 | c.hook = f; |
30 | c.hook_data = hook_data; |
31 | g_array_append_val(h,c); |
32 | } |
33 | |
34 | |
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35 | void lttv_hooks_add_list(LttvHooks *h, LttvHooks *list) |
36 | { |
37 | guint i; |
38 | |
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39 | if(list == NULL) return; |
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40 | for(i = 0 ; i < list->len; i++) { |
41 | g_array_append_val(h,g_array_index(list, LttvHookClosure, i)); |
42 | } |
43 | } |
44 | |
45 | |
46 | void *lttv_hooks_remove(LttvHooks *h, LttvHook f) |
47 | { |
48 | unsigned i; |
49 | |
50 | void *hook_data; |
51 | |
52 | LttvHookClosure *c; |
53 | |
54 | for(i = 0 ; i < h->len ; i++) { |
55 | c = &g_array_index(h, LttvHookClosure, i); |
56 | if(c->hook == f) { |
57 | hook_data = c->hook_data; |
58 | lttv_hooks_remove_by_position(h, i); |
59 | return hook_data; |
60 | } |
61 | } |
62 | return NULL; |
63 | } |
64 | |
65 | |
66 | void lttv_hooks_remove_data(LttvHooks *h, LttvHook f, void *hook_data) |
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67 | { |
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68 | unsigned i; |
69 | |
70 | LttvHookClosure *c; |
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71 | |
72 | for(i = 0 ; i < h->len ; i++) { |
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73 | c = &g_array_index(h, LttvHookClosure, i); |
74 | if(c->hook == f && c->hook_data == hook_data) { |
75 | lttv_hooks_remove_by_position(h, i); |
76 | return; |
77 | } |
78 | } |
79 | } |
80 | |
81 | |
82 | void lttv_hooks_remove_list(LttvHooks *h, LttvHooks *list) |
83 | { |
84 | guint i, j; |
85 | |
86 | LttvHookClosure *c, *c_list; |
87 | |
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88 | if(list == NULL) return; |
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89 | for(i = 0, j = 0 ; i < h->len && j < list->len ;) { |
90 | c = &g_array_index(h, LttvHookClosure, i); |
91 | c_list = &g_array_index(list, LttvHookClosure, j); |
92 | if(c->hook == c_list->hook && c->hook_data == c_list->hook_data) { |
93 | lttv_hooks_remove_by_position(h, i); |
94 | j++; |
95 | } |
96 | else i++; |
97 | } |
98 | |
99 | /* Normally the hooks in h are ordered as in list. If this is not the case, |
100 | try harder here. */ |
101 | |
102 | if(j < list->len) { |
103 | for(; j < list->len ; j++) { |
104 | c_list = &g_array_index(list, LttvHookClosure, j); |
105 | lttv_hooks_remove_data(h, c_list->hook, c_list->hook_data); |
106 | } |
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107 | } |
108 | } |
109 | |
110 | |
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111 | unsigned lttv_hooks_number(LttvHooks *h) |
112 | { |
113 | return h->len; |
114 | } |
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115 | |
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116 | |
117 | void lttv_hooks_get(LttvHooks *h, unsigned i, LttvHook *f, void **hook_data) |
118 | { |
119 | LttvHookClosure *c; |
120 | |
121 | c = &g_array_index(h, LttvHookClosure, i); |
122 | *f = c->hook; |
123 | *hook_data = c->hook_data; |
124 | } |
125 | |
126 | |
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127 | void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i) |
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128 | { |
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129 | g_array_remove_index(h, i); |
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130 | } |
131 | |
132 | |
133 | gboolean lttv_hooks_call(LttvHooks *h, void *call_data) |
134 | { |
135 | gboolean ret = FALSE; |
136 | |
137 | LttvHookClosure *c; |
138 | |
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139 | guint i; |
140 | |
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141 | if(h != NULL) { |
142 | for(i = 0 ; i < h->len ; i++) { |
143 | c = &g_array_index(h, LttvHookClosure, i); |
144 | ret = ret || c->hook(c->hook_data,call_data); |
145 | } |
146 | } |
147 | return ret; |
148 | } |
149 | |
150 | |
151 | gboolean lttv_hooks_call_check(LttvHooks *h, void *call_data) |
152 | { |
153 | LttvHookClosure *c; |
154 | |
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155 | guint i; |
156 | |
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157 | for(i = 0 ; i < h->len ; i++) { |
158 | c = &g_array_index(h, LttvHookClosure, i); |
159 | if(c->hook(c->hook_data,call_data)) return TRUE; |
160 | } |
161 | return FALSE; |
162 | } |
163 | |
164 | |
165 | LttvHooksById *lttv_hooks_by_id_new() |
166 | { |
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167 | return g_ptr_array_new(); |
168 | } |
169 | |
170 | |
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171 | void lttv_hooks_by_id_destroy(LttvHooksById *h) |
172 | { |
173 | guint i; |
174 | |
175 | for(i = 0 ; i < h->len ; i++) { |
176 | if(h->pdata[i] != NULL) lttv_hooks_destroy((LttvHooks *)(h->pdata[i])); |
177 | } |
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178 | g_ptr_array_free(h, TRUE); |
179 | } |
180 | |
181 | |
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182 | LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id) |
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183 | { |
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184 | if(h->len <= id) g_ptr_array_set_size(h, id + 1); |
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185 | if(h->pdata[id] == NULL) h->pdata[id] = lttv_hooks_new(); |
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186 | return h->pdata[id]; |
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187 | } |
188 | |
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189 | |
190 | unsigned lttv_hooks_by_id_max_id(LttvHooksById *h) |
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191 | { |
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192 | return h->len; |
193 | } |
194 | |
195 | |
196 | LttvHooks *lttv_hooks_by_id_get(LttvHooksById *h, unsigned id) |
197 | { |
198 | if(id < h->len) return h->pdata[id]; |
199 | return NULL; |
200 | } |
201 | |
202 | |
203 | void lttv_hooks_by_id_remove(LttvHooksById *h, unsigned id) |
204 | { |
205 | if(id < h->len && h->pdata[id] != NULL) { |
206 | lttv_hooks_destroy((LttvHooks *)h->pdata[id]); |
207 | h->pdata[id] = NULL; |
208 | } |
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209 | } |
210 | |