| 1 | |
| 2 | #include <lttv/hook.h> |
| 3 | |
| 4 | |
| 5 | typedef struct _LttvHookClosure { |
| 6 | LttvHook hook; |
| 7 | void *hook_data; |
| 8 | } LttvHookClosure; |
| 9 | |
| 10 | |
| 11 | LttvHooks *lttv_hooks_new() |
| 12 | { |
| 13 | return g_array_new(FALSE, FALSE, sizeof(LttvHookClosure)); |
| 14 | } |
| 15 | |
| 16 | |
| 17 | void lttv_hooks_destroy(LttvHooks *h) |
| 18 | { |
| 19 | g_array_free(h, TRUE); |
| 20 | } |
| 21 | |
| 22 | |
| 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"); |
| 28 | |
| 29 | c.hook = f; |
| 30 | c.hook_data = hook_data; |
| 31 | g_array_append_val(h,c); |
| 32 | } |
| 33 | |
| 34 | |
| 35 | void lttv_hooks_add_list(LttvHooks *h, LttvHooks *list) |
| 36 | { |
| 37 | guint i; |
| 38 | |
| 39 | if(list == NULL) return; |
| 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) |
| 67 | { |
| 68 | unsigned i; |
| 69 | |
| 70 | LttvHookClosure *c; |
| 71 | |
| 72 | for(i = 0 ; i < h->len ; i++) { |
| 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 | |
| 88 | if(list == NULL) return; |
| 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 | } |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | |
| 111 | unsigned lttv_hooks_number(LttvHooks *h) |
| 112 | { |
| 113 | return h->len; |
| 114 | } |
| 115 | |
| 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 | |
| 127 | void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i) |
| 128 | { |
| 129 | g_array_remove_index(h, i); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | gboolean lttv_hooks_call(LttvHooks *h, void *call_data) |
| 134 | { |
| 135 | gboolean ret = FALSE; |
| 136 | |
| 137 | LttvHookClosure *c; |
| 138 | |
| 139 | guint i; |
| 140 | |
| 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 | |
| 155 | guint i; |
| 156 | |
| 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 | { |
| 167 | return g_ptr_array_new(); |
| 168 | } |
| 169 | |
| 170 | |
| 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 | } |
| 178 | g_ptr_array_free(h, TRUE); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id) |
| 183 | { |
| 184 | if(h->len <= id) g_ptr_array_set_size(h, id + 1); |
| 185 | if(h->pdata[id] == NULL) h->pdata[id] = lttv_hooks_new(); |
| 186 | return h->pdata[id]; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | unsigned lttv_hooks_by_id_max_id(LttvHooksById *h) |
| 191 | { |
| 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 | } |
| 209 | } |
| 210 | |