| 1 | |
| 2 | #include <lttv/attribute.h> |
| 3 | |
| 4 | typedef union _AttributeValue { |
| 5 | int dv_int; |
| 6 | unsigned dv_uint; |
| 7 | long dv_long; |
| 8 | unsigned long dv_ulong; |
| 9 | float dv_float; |
| 10 | double dv_double; |
| 11 | LttvTime dv_time; |
| 12 | gpointer dv_pointer; |
| 13 | char *dv_string; |
| 14 | GObject *dv_gobject; |
| 15 | } AttributeValue; |
| 16 | |
| 17 | |
| 18 | typedef struct _Attribute { |
| 19 | LttvAttributeName name; |
| 20 | LttvAttributeType type; |
| 21 | AttributeValue value; |
| 22 | } Attribute; |
| 23 | |
| 24 | |
| 25 | LttvAttributeValue address_of_value(LttvAttributeType t, AttributeValue *v) |
| 26 | { |
| 27 | LttvAttributeValue va; |
| 28 | |
| 29 | switch(t) { |
| 30 | case LTTV_INT: va.v_int = &v->dv_int; break; |
| 31 | case LTTV_UINT: va.v_uint = &v->dv_uint; break; |
| 32 | case LTTV_LONG: va.v_long = &v->dv_long; break; |
| 33 | case LTTV_ULONG: va.v_ulong = &v->dv_ulong; break; |
| 34 | case LTTV_FLOAT: va.v_float = &v->dv_float; break; |
| 35 | case LTTV_DOUBLE: va.v_double = &v->dv_double; break; |
| 36 | case LTTV_TIME: va.v_time = &v->dv_time; break; |
| 37 | case LTTV_POINTER: va.v_pointer = &v->dv_pointer; break; |
| 38 | case LTTV_STRING: va.v_string = &v->dv_string; break; |
| 39 | case LTTV_GOBJECT: va.v_gobject = &v->dv_gobject; break; |
| 40 | } |
| 41 | return va; |
| 42 | } |
| 43 | |
| 44 | |
| 45 | AttributeValue init_value(LttvAttributeType t) |
| 46 | { |
| 47 | AttributeValue v; |
| 48 | |
| 49 | switch(t) { |
| 50 | case LTTV_INT: v.dv_int = 0; break; |
| 51 | case LTTV_UINT: v.dv_uint = 0; break; |
| 52 | case LTTV_LONG: v.dv_long = 0; break; |
| 53 | case LTTV_ULONG: v.dv_ulong = 0; break; |
| 54 | case LTTV_FLOAT: v.dv_float = 0; break; |
| 55 | case LTTV_DOUBLE: v.dv_double = 0; break; |
| 56 | case LTTV_TIME: v.dv_time.tv_sec = 0; v.dv_time.tv_nsec = 0; break; |
| 57 | case LTTV_POINTER: v.dv_pointer = NULL; break; |
| 58 | case LTTV_STRING: v.dv_string = NULL; break; |
| 59 | case LTTV_GOBJECT: v.dv_gobject = NULL; break; |
| 60 | } |
| 61 | return v; |
| 62 | } |
| 63 | |
| 64 | |
| 65 | unsigned int |
| 66 | lttv_attribute_get_number(LttvAttribute *self) |
| 67 | { |
| 68 | return self->attributes->len; |
| 69 | } |
| 70 | |
| 71 | |
| 72 | gboolean |
| 73 | lttv_attribute_named(LttvAttribute *self, gboolean *homogeneous) |
| 74 | { |
| 75 | *homogeneous = FALSE; |
| 76 | return TRUE; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | LttvAttributeType |
| 81 | lttv_attribute_get(LttvAttribute *self, unsigned i, LttvAttributeName *name, |
| 82 | LttvAttributeValue *v) |
| 83 | { |
| 84 | Attribute *a; |
| 85 | |
| 86 | a = &g_array_index(self->attributes, Attribute, i); |
| 87 | *name = a->name; |
| 88 | *v = address_of_value(a->type, &(a->value)); |
| 89 | return a->type; |
| 90 | } |
| 91 | |
| 92 | |
| 93 | LttvAttributeType |
| 94 | lttv_attribute_get_by_name(LttvAttribute *self, LttvAttributeName name, |
| 95 | LttvAttributeValue *v) |
| 96 | { |
| 97 | Attribute *a; |
| 98 | |
| 99 | unsigned i; |
| 100 | |
| 101 | gpointer p; |
| 102 | |
| 103 | p = g_hash_table_lookup(self->names, GUINT_TO_POINTER(name)); |
| 104 | if(p == NULL) return LTTV_NONE; |
| 105 | |
| 106 | i = GPOINTER_TO_UINT(p); |
| 107 | i--; |
| 108 | a = &g_array_index(self->attributes, Attribute, i); |
| 109 | *v = address_of_value(a->type, &(a->value)); |
| 110 | return a->type; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | LttvAttributeValue |
| 115 | lttv_attribute_add(LttvAttribute *self, LttvAttributeName name, |
| 116 | LttvAttributeType t) |
| 117 | { |
| 118 | unsigned i; |
| 119 | |
| 120 | Attribute a, *pa; |
| 121 | |
| 122 | i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name)); |
| 123 | if(i != 0) g_error("duplicate entry in attribute table"); |
| 124 | |
| 125 | a.name = name; |
| 126 | a.type = t; |
| 127 | a.value = init_value(t); |
| 128 | g_array_append_val(self->attributes, a); |
| 129 | i = self->attributes->len - 1; |
| 130 | pa = &g_array_index(self->attributes, Attribute, i); |
| 131 | g_hash_table_insert(self->names, GUINT_TO_POINTER(name), |
| 132 | GUINT_TO_POINTER(i + 1)); |
| 133 | return address_of_value(t, &(pa->value)); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | /* Remove an attribute */ |
| 138 | |
| 139 | void |
| 140 | lttv_attribute_remove(LttvAttribute *self, unsigned i) |
| 141 | { |
| 142 | Attribute *a; |
| 143 | |
| 144 | a = &g_array_index(self->attributes, Attribute, i); |
| 145 | |
| 146 | /* Remove the array element and its entry in the name index */ |
| 147 | |
| 148 | g_hash_table_remove(self->names, GUINT_TO_POINTER(a->name)); |
| 149 | g_array_remove_index_fast(self->attributes, i); |
| 150 | |
| 151 | /* The element used to replace the removed element has its index entry |
| 152 | all wrong now. Reinsert it with its new position. */ |
| 153 | |
| 154 | if(self->attributes->len != i){ |
| 155 | g_hash_table_remove(self->names, GUINT_TO_POINTER(a->name)); |
| 156 | g_hash_table_insert(self->names, GUINT_TO_POINTER(a->name), GUINT_TO_POINTER(i + 1)); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | void |
| 161 | lttv_attribute_remove_by_name(LttvAttribute *self, LttvAttributeName name) |
| 162 | { |
| 163 | unsigned i; |
| 164 | |
| 165 | i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name)); |
| 166 | if(i == 0) g_error("remove by name non existent attribute"); |
| 167 | |
| 168 | lttv_attribute_remove(self, i - 1); |
| 169 | } |
| 170 | |
| 171 | /* Create an empty iattribute object and add it as an attribute under the |
| 172 | specified name, or return an existing iattribute attribute. If an |
| 173 | attribute of that name already exists but is not a GObject supporting the |
| 174 | iattribute interface, return NULL. */ |
| 175 | |
| 176 | LttvIAttribute* |
| 177 | lttv_attribute_create_subdir(LttvAttribute *self, LttvAttributeName name) |
| 178 | { |
| 179 | unsigned i; |
| 180 | |
| 181 | Attribute a; |
| 182 | |
| 183 | LttvAttribute *new; |
| 184 | |
| 185 | i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name)); |
| 186 | if(i != 0) { |
| 187 | a = g_array_index(self->attributes, Attribute, i - 1); |
| 188 | if(a.type == LTTV_GOBJECT && LTTV_IS_IATTRIBUTE(a.value.dv_gobject)) { |
| 189 | return LTTV_IATTRIBUTE(a.value.dv_gobject); |
| 190 | } |
| 191 | else return NULL; |
| 192 | } |
| 193 | new = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL); |
| 194 | *(lttv_attribute_add(self, name, LTTV_GOBJECT).v_gobject) = G_OBJECT(new); |
| 195 | return (LttvIAttribute *)new; |
| 196 | } |
| 197 | |
| 198 | gboolean |
| 199 | lttv_attribute_find(LttvAttribute *self, LttvAttributeName name, |
| 200 | LttvAttributeType t, LttvAttributeValue *v) |
| 201 | { |
| 202 | unsigned i; |
| 203 | |
| 204 | Attribute *a; |
| 205 | |
| 206 | i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name)); |
| 207 | if(i != 0) { |
| 208 | a = &g_array_index(self->attributes, Attribute, i - 1); |
| 209 | if(a->type != t) return FALSE; |
| 210 | *v = address_of_value(t, &(a->value)); |
| 211 | return TRUE; |
| 212 | } |
| 213 | |
| 214 | *v = lttv_attribute_add(self, name, t); |
| 215 | return TRUE; |
| 216 | } |
| 217 | |
| 218 | |
| 219 | static void |
| 220 | attribute_interface_init (gpointer g_iface, gpointer iface_data) |
| 221 | { |
| 222 | LttvIAttributeClass *klass = (LttvIAttributeClass *)g_iface; |
| 223 | |
| 224 | klass->get_number = (unsigned int (*) (LttvIAttribute *self)) |
| 225 | lttv_attribute_get_number; |
| 226 | |
| 227 | klass->named = (gboolean (*) (LttvIAttribute *self, gboolean *homogeneous)) |
| 228 | lttv_attribute_named; |
| 229 | |
| 230 | klass->get = (LttvAttributeType (*) (LttvIAttribute *self, unsigned i, |
| 231 | LttvAttributeName *name, LttvAttributeValue *v)) lttv_attribute_get; |
| 232 | |
| 233 | klass->get_by_name = (LttvAttributeType (*) (LttvIAttribute *self, |
| 234 | LttvAttributeName name, LttvAttributeValue *v)) |
| 235 | lttv_attribute_get_by_name; |
| 236 | |
| 237 | klass->add = (LttvAttributeValue (*) (LttvIAttribute *self, |
| 238 | LttvAttributeName name, LttvAttributeType t)) lttv_attribute_add; |
| 239 | |
| 240 | klass->remove = (void (*) (LttvIAttribute *self, unsigned i)) |
| 241 | lttv_attribute_remove; |
| 242 | |
| 243 | klass->remove_by_name = (void (*) (LttvIAttribute *self, |
| 244 | LttvAttributeName name)) lttv_attribute_remove_by_name; |
| 245 | |
| 246 | klass->create_subdir = (LttvIAttribute* (*) (LttvIAttribute *self, |
| 247 | LttvAttributeName name)) lttv_attribute_create_subdir; |
| 248 | } |
| 249 | |
| 250 | |
| 251 | static void |
| 252 | attribute_instance_init (GTypeInstance *instance, gpointer g_class) |
| 253 | { |
| 254 | LttvAttribute *self = (LttvAttribute *)instance; |
| 255 | self->names = g_hash_table_new(g_direct_hash, g_direct_equal); |
| 256 | self->attributes = g_array_new(FALSE, FALSE, sizeof(Attribute)); |
| 257 | } |
| 258 | |
| 259 | |
| 260 | static void |
| 261 | attribute_finalize (LttvAttribute *self) |
| 262 | { |
| 263 | g_hash_table_destroy(self->names); |
| 264 | g_array_free(self->attributes, TRUE); |
| 265 | G_OBJECT_CLASS(g_type_class_peek_parent(LTTV_ATTRIBUTE_GET_CLASS(self)))->finalize(G_OBJECT(self)); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | static void |
| 270 | attribute_class_init (LttvAttributeClass *klass) |
| 271 | { |
| 272 | GObjectClass *gobject_class = G_OBJECT_CLASS(klass); |
| 273 | |
| 274 | gobject_class->finalize = (void (*)(GObject *self))attribute_finalize; |
| 275 | } |
| 276 | |
| 277 | GType |
| 278 | lttv_attribute_get_type (void) |
| 279 | { |
| 280 | static GType type = 0; |
| 281 | if (type == 0) { |
| 282 | static const GTypeInfo info = { |
| 283 | sizeof (LttvAttributeClass), |
| 284 | NULL, /* base_init */ |
| 285 | NULL, /* base_finalize */ |
| 286 | (GClassInitFunc) attribute_class_init, /* class_init */ |
| 287 | NULL, /* class_finalize */ |
| 288 | NULL, /* class_data */ |
| 289 | sizeof (LttvAttribute), |
| 290 | 0, /* n_preallocs */ |
| 291 | (GInstanceInitFunc) attribute_instance_init /* instance_init */ |
| 292 | }; |
| 293 | |
| 294 | static const GInterfaceInfo iattribute_info = { |
| 295 | (GInterfaceInitFunc) attribute_interface_init, /* interface_init */ |
| 296 | NULL, /* interface_finalize */ |
| 297 | NULL /* interface_data */ |
| 298 | }; |
| 299 | |
| 300 | type = g_type_register_static (G_TYPE_OBJECT, "LttvAttributeType", &info, |
| 301 | 0); |
| 302 | g_type_add_interface_static (type, LTTV_IATTRIBUTE_TYPE, &iattribute_info); |
| 303 | } |
| 304 | return type; |
| 305 | } |
| 306 | |
| 307 | |