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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_critical("lttv_hooks_destroy()"); |
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20 | g_array_free(h, TRUE); |
21 | } |
22 | |
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23 | |
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24 | void lttv_hooks_add(LttvHooks *h, LttvHook f, void *hook_data) |
25 | { |
26 | LttvHookClosure c; |
27 | |
28 | if(h == NULL)g_error("Null hook added"); |
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29 | |
30 | c.hook = f; |
31 | c.hook_data = hook_data; |
32 | g_array_append_val(h,c); |
33 | } |
34 | |
35 | |
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36 | void lttv_hooks_add_list(LttvHooks *h, LttvHooks *list) |
37 | { |
38 | guint i; |
39 | |
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40 | if(list == NULL) return; |
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41 | for(i = 0 ; i < list->len; i++) { |
42 | g_array_append_val(h,g_array_index(list, LttvHookClosure, i)); |
43 | } |
44 | } |
45 | |
46 | |
47 | void *lttv_hooks_remove(LttvHooks *h, LttvHook f) |
48 | { |
49 | unsigned i; |
50 | |
51 | void *hook_data; |
52 | |
53 | LttvHookClosure *c; |
54 | |
55 | for(i = 0 ; i < h->len ; i++) { |
56 | c = &g_array_index(h, LttvHookClosure, i); |
57 | if(c->hook == f) { |
58 | hook_data = c->hook_data; |
59 | lttv_hooks_remove_by_position(h, i); |
60 | return hook_data; |
61 | } |
62 | } |
63 | return NULL; |
64 | } |
65 | |
66 | |
67 | void lttv_hooks_remove_data(LttvHooks *h, LttvHook f, void *hook_data) |
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68 | { |
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69 | unsigned i; |
70 | |
71 | LttvHookClosure *c; |
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72 | |
73 | for(i = 0 ; i < h->len ; i++) { |
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74 | c = &g_array_index(h, LttvHookClosure, i); |
75 | if(c->hook == f && c->hook_data == hook_data) { |
76 | lttv_hooks_remove_by_position(h, i); |
77 | return; |
78 | } |
79 | } |
80 | } |
81 | |
82 | |
83 | void lttv_hooks_remove_list(LttvHooks *h, LttvHooks *list) |
84 | { |
85 | guint i, j; |
86 | |
87 | LttvHookClosure *c, *c_list; |
88 | |
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89 | if(list == NULL) return; |
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90 | for(i = 0, j = 0 ; i < h->len && j < list->len ;) { |
91 | c = &g_array_index(h, LttvHookClosure, i); |
92 | c_list = &g_array_index(list, LttvHookClosure, j); |
93 | if(c->hook == c_list->hook && c->hook_data == c_list->hook_data) { |
94 | lttv_hooks_remove_by_position(h, i); |
95 | j++; |
96 | } |
97 | else i++; |
98 | } |
99 | |
100 | /* Normally the hooks in h are ordered as in list. If this is not the case, |
101 | try harder here. */ |
102 | |
103 | if(j < list->len) { |
104 | for(; j < list->len ; j++) { |
105 | c_list = &g_array_index(list, LttvHookClosure, j); |
106 | lttv_hooks_remove_data(h, c_list->hook, c_list->hook_data); |
107 | } |
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108 | } |
109 | } |
110 | |
111 | |
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112 | unsigned lttv_hooks_number(LttvHooks *h) |
113 | { |
114 | return h->len; |
115 | } |
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116 | |
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117 | |
118 | void lttv_hooks_get(LttvHooks *h, unsigned i, LttvHook *f, void **hook_data) |
119 | { |
120 | LttvHookClosure *c; |
121 | |
122 | c = &g_array_index(h, LttvHookClosure, i); |
123 | *f = c->hook; |
124 | *hook_data = c->hook_data; |
125 | } |
126 | |
127 | |
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128 | void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i) |
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129 | { |
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130 | g_array_remove_index(h, i); |
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131 | } |
132 | |
133 | |
134 | gboolean lttv_hooks_call(LttvHooks *h, void *call_data) |
135 | { |
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136 | gboolean ret, sum_ret = FALSE; |
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137 | |
138 | LttvHookClosure *c; |
139 | |
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140 | guint i; |
141 | |
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142 | if(h != NULL) { |
143 | for(i = 0 ; i < h->len ; i++) { |
144 | c = &g_array_index(h, LttvHookClosure, i); |
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145 | ret = c->hook(c->hook_data,call_data); |
146 | sum_ret = sum_ret || ret; |
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147 | } |
148 | } |
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149 | return sum_ret; |
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150 | } |
151 | |
152 | |
153 | gboolean lttv_hooks_call_check(LttvHooks *h, void *call_data) |
154 | { |
155 | LttvHookClosure *c; |
156 | |
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157 | guint i; |
158 | |
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159 | for(i = 0 ; i < h->len ; i++) { |
160 | c = &g_array_index(h, LttvHookClosure, i); |
161 | if(c->hook(c->hook_data,call_data)) return TRUE; |
162 | } |
163 | return FALSE; |
164 | } |
165 | |
166 | |
167 | LttvHooksById *lttv_hooks_by_id_new() |
168 | { |
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169 | return g_ptr_array_new(); |
170 | } |
171 | |
172 | |
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173 | void lttv_hooks_by_id_destroy(LttvHooksById *h) |
174 | { |
175 | guint i; |
176 | |
177 | for(i = 0 ; i < h->len ; i++) { |
178 | if(h->pdata[i] != NULL) lttv_hooks_destroy((LttvHooks *)(h->pdata[i])); |
179 | } |
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180 | g_ptr_array_free(h, TRUE); |
181 | } |
182 | |
183 | |
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184 | LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id) |
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185 | { |
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186 | if(h->len <= id) g_ptr_array_set_size(h, id + 1); |
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187 | if(h->pdata[id] == NULL) h->pdata[id] = lttv_hooks_new(); |
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188 | return h->pdata[id]; |
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189 | } |
190 | |
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191 | |
192 | unsigned lttv_hooks_by_id_max_id(LttvHooksById *h) |
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193 | { |
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194 | return h->len; |
195 | } |
196 | |
197 | |
198 | LttvHooks *lttv_hooks_by_id_get(LttvHooksById *h, unsigned id) |
199 | { |
200 | if(id < h->len) return h->pdata[id]; |
201 | return NULL; |
202 | } |
203 | |
204 | |
205 | void lttv_hooks_by_id_remove(LttvHooksById *h, unsigned id) |
206 | { |
207 | if(id < h->len && h->pdata[id] != NULL) { |
208 | lttv_hooks_destroy((LttvHooks *)h->pdata[id]); |
209 | h->pdata[id] = NULL; |
210 | } |
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211 | } |
212 | |