| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #define BT_LOG_TAG "LIB/INT-RANGE-SET" |
| 8 | #include "lib/logging.h" |
| 9 | |
| 10 | #include <stdbool.h> |
| 11 | |
| 12 | #include <babeltrace2/babeltrace.h> |
| 13 | |
| 14 | #include "lib/assert-cond.h" |
| 15 | #include "common/assert.h" |
| 16 | #include "func-status.h" |
| 17 | #include "integer-range-set.h" |
| 18 | |
| 19 | uint64_t bt_integer_range_unsigned_get_lower( |
| 20 | const struct bt_integer_range_unsigned *u_range) |
| 21 | { |
| 22 | const struct bt_integer_range *range = (const void *) u_range; |
| 23 | |
| 24 | BT_ASSERT_PRE_DEV_INT_RANGE_NON_NULL(range); |
| 25 | return range->lower.u; |
| 26 | } |
| 27 | |
| 28 | uint64_t bt_integer_range_unsigned_get_upper( |
| 29 | const struct bt_integer_range_unsigned *u_range) |
| 30 | { |
| 31 | const struct bt_integer_range *range = (const void *) u_range; |
| 32 | |
| 33 | BT_ASSERT_PRE_DEV_INT_RANGE_NON_NULL(range); |
| 34 | return range->upper.u; |
| 35 | } |
| 36 | |
| 37 | int64_t bt_integer_range_signed_get_lower( |
| 38 | const struct bt_integer_range_signed *i_range) |
| 39 | { |
| 40 | const struct bt_integer_range *range = (const void *) i_range; |
| 41 | |
| 42 | BT_ASSERT_PRE_DEV_INT_RANGE_NON_NULL(range); |
| 43 | return range->lower.i; |
| 44 | } |
| 45 | |
| 46 | int64_t bt_integer_range_signed_get_upper( |
| 47 | const struct bt_integer_range_signed *i_range) |
| 48 | { |
| 49 | const struct bt_integer_range *range = (const void *) i_range; |
| 50 | |
| 51 | BT_ASSERT_PRE_DEV_INT_RANGE_NON_NULL(range); |
| 52 | return range->upper.i; |
| 53 | } |
| 54 | |
| 55 | static |
| 56 | bool compare_ranges(const struct bt_integer_range *range_a, |
| 57 | const struct bt_integer_range *range_b) |
| 58 | { |
| 59 | return range_a->lower.u == range_b->lower.u && |
| 60 | range_a->upper.u == range_b->upper.u; |
| 61 | } |
| 62 | |
| 63 | bt_bool bt_integer_range_unsigned_is_equal( |
| 64 | const struct bt_integer_range_unsigned *range_a, |
| 65 | const struct bt_integer_range_unsigned *range_b) |
| 66 | { |
| 67 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-a", range_a, |
| 68 | "Integer range A"); |
| 69 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-b", range_b, |
| 70 | "Integer range B"); |
| 71 | return (bt_bool) compare_ranges((const void *) range_a, |
| 72 | (const void *) range_b); |
| 73 | } |
| 74 | |
| 75 | bt_bool bt_integer_range_signed_is_equal( |
| 76 | const struct bt_integer_range_signed *range_a, |
| 77 | const struct bt_integer_range_signed *range_b) |
| 78 | { |
| 79 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-a", range_a, |
| 80 | "Integer range A"); |
| 81 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-b", range_b, |
| 82 | "Integer range B"); |
| 83 | return (bt_bool) compare_ranges((const void *) range_a, |
| 84 | (const void *) range_b); |
| 85 | } |
| 86 | |
| 87 | uint64_t bt_integer_range_set_get_range_count( |
| 88 | const bt_integer_range_set *range_set) |
| 89 | { |
| 90 | BT_ASSERT_PRE_DEV_INT_RANGE_SET_NON_NULL(range_set); |
| 91 | return (uint64_t) range_set->ranges->len; |
| 92 | } |
| 93 | |
| 94 | const struct bt_integer_range_unsigned * |
| 95 | bt_integer_range_set_unsigned_borrow_range_by_index_const( |
| 96 | const bt_integer_range_set_unsigned *u_range_set, |
| 97 | uint64_t index) |
| 98 | { |
| 99 | const struct bt_integer_range_set *range_set = |
| 100 | (const void *) u_range_set; |
| 101 | |
| 102 | BT_ASSERT_PRE_DEV_INT_RANGE_SET_NON_NULL(range_set); |
| 103 | BT_ASSERT_PRE_DEV_VALID_INDEX(index, range_set->ranges->len); |
| 104 | return (const void *) BT_INTEGER_RANGE_SET_RANGE_AT_INDEX(range_set, |
| 105 | index); |
| 106 | } |
| 107 | |
| 108 | const struct bt_integer_range_signed * |
| 109 | bt_integer_range_set_signed_borrow_range_by_index_const( |
| 110 | const bt_integer_range_set_signed *i_range_set, uint64_t index) |
| 111 | { |
| 112 | const struct bt_integer_range_set *range_set = |
| 113 | (const void *) i_range_set; |
| 114 | |
| 115 | BT_ASSERT_PRE_DEV_INT_RANGE_SET_NON_NULL(range_set); |
| 116 | BT_ASSERT_PRE_DEV_VALID_INDEX(index, range_set->ranges->len); |
| 117 | return (const void *) BT_INTEGER_RANGE_SET_RANGE_AT_INDEX(range_set, |
| 118 | index); |
| 119 | } |
| 120 | |
| 121 | static |
| 122 | void destroy_range_set(struct bt_object *obj) |
| 123 | { |
| 124 | struct bt_integer_range_set *range_set = (void *) obj; |
| 125 | |
| 126 | BT_LIB_LOGD("Destroying integer range set: %!+R", range_set); |
| 127 | |
| 128 | if (range_set->ranges) { |
| 129 | g_array_free(range_set->ranges, TRUE); |
| 130 | range_set->ranges = NULL; |
| 131 | } |
| 132 | |
| 133 | g_free(range_set); |
| 134 | } |
| 135 | |
| 136 | static |
| 137 | struct bt_integer_range_set *create_range_set(void) |
| 138 | { |
| 139 | struct bt_integer_range_set *range_set; |
| 140 | |
| 141 | BT_LOGD_STR("Creating empty integer range set."); |
| 142 | range_set = g_new0(struct bt_integer_range_set, 1); |
| 143 | |
| 144 | if (!range_set) { |
| 145 | BT_LIB_LOGE_APPEND_CAUSE( |
| 146 | "Failed to allocate one integer range set."); |
| 147 | goto error; |
| 148 | } |
| 149 | |
| 150 | bt_object_init_shared(&range_set->base, destroy_range_set); |
| 151 | range_set->ranges = g_array_new(FALSE, TRUE, |
| 152 | sizeof(struct bt_integer_range)); |
| 153 | if (!range_set->ranges) { |
| 154 | BT_LIB_LOGE_APPEND_CAUSE( |
| 155 | "Failed to allocate integer range set's range array."); |
| 156 | goto error; |
| 157 | } |
| 158 | |
| 159 | BT_LOGD_STR("Created empty integer range set."); |
| 160 | goto end; |
| 161 | |
| 162 | error: |
| 163 | BT_OBJECT_PUT_REF_AND_RESET(range_set); |
| 164 | |
| 165 | end: |
| 166 | return range_set; |
| 167 | } |
| 168 | |
| 169 | struct bt_integer_range_set_unsigned *bt_integer_range_set_unsigned_create(void) |
| 170 | { |
| 171 | BT_ASSERT_PRE_NO_ERROR(); |
| 172 | |
| 173 | return (void *) create_range_set(); |
| 174 | } |
| 175 | |
| 176 | struct bt_integer_range_set_signed *bt_integer_range_set_signed_create(void) |
| 177 | { |
| 178 | BT_ASSERT_PRE_NO_ERROR(); |
| 179 | |
| 180 | return (void *) create_range_set(); |
| 181 | } |
| 182 | |
| 183 | static |
| 184 | void add_range_to_range_set(struct bt_integer_range_set *range_set, |
| 185 | uint64_t u_lower, uint64_t u_upper) |
| 186 | { |
| 187 | struct bt_integer_range range = { |
| 188 | .lower.u = u_lower, |
| 189 | .upper.u = u_upper, |
| 190 | }; |
| 191 | |
| 192 | BT_ASSERT_PRE_INT_RANGE_SET_NON_NULL(range_set); |
| 193 | BT_ASSERT_PRE_DEV_HOT("integer-range-set", range_set, |
| 194 | "Integer range set", ": %!+R", range_set); |
| 195 | g_array_append_val(range_set->ranges, range); |
| 196 | BT_LIB_LOGD("Added integer range to integer range set: " |
| 197 | "%![range-set-]+R, lower-unsigned=%" PRIu64 ", " |
| 198 | "upper-unsigned=%" PRIu64, range_set, u_lower, u_upper); |
| 199 | } |
| 200 | |
| 201 | enum bt_integer_range_set_add_range_status |
| 202 | bt_integer_range_set_unsigned_add_range( |
| 203 | struct bt_integer_range_set_unsigned *range_set, |
| 204 | uint64_t lower, uint64_t upper) |
| 205 | { |
| 206 | BT_ASSERT_PRE_NO_ERROR(); |
| 207 | BT_ASSERT_PRE("lower-lteq-upper", lower <= upper, |
| 208 | "Range's upper bound is less than lower bound: " |
| 209 | "upper=%" PRIu64 ", lower=%" PRIu64, lower, upper); |
| 210 | add_range_to_range_set((void *) range_set, lower, upper); |
| 211 | return BT_FUNC_STATUS_OK; |
| 212 | } |
| 213 | |
| 214 | enum bt_integer_range_set_add_range_status |
| 215 | bt_integer_range_set_signed_add_range( |
| 216 | struct bt_integer_range_set_signed *range_set, |
| 217 | int64_t lower, int64_t upper) |
| 218 | { |
| 219 | BT_ASSERT_PRE_NO_ERROR(); |
| 220 | BT_ASSERT_PRE("lower-lteq-upper", lower <= upper, |
| 221 | "Range's upper bound is less than lower bound: " |
| 222 | "upper=%" PRId64 ", lower=%" PRId64, lower, upper); |
| 223 | add_range_to_range_set((void *) range_set, |
| 224 | (int64_t) lower, (int64_t) upper); |
| 225 | return BT_FUNC_STATUS_OK; |
| 226 | } |
| 227 | |
| 228 | BT_HIDDEN |
| 229 | void _bt_integer_range_set_freeze(const struct bt_integer_range_set *range_set) |
| 230 | { |
| 231 | BT_ASSERT(range_set); |
| 232 | BT_LIB_LOGD("Freezing integer range set: %!+R", range_set); |
| 233 | ((struct bt_integer_range_set *) range_set)->frozen = true; |
| 234 | } |
| 235 | |
| 236 | BT_HIDDEN |
| 237 | bool bt_integer_range_set_unsigned_has_overlaps( |
| 238 | const struct bt_integer_range_set *range_set) |
| 239 | { |
| 240 | uint64_t i, j; |
| 241 | bool has_overlap = false; |
| 242 | |
| 243 | BT_ASSERT(range_set); |
| 244 | |
| 245 | for (i = 0; i < range_set->ranges->len; i++) { |
| 246 | const struct bt_integer_range *range_i = |
| 247 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX(range_set, i); |
| 248 | |
| 249 | for (j = 0; j < range_set->ranges->len; j++) { |
| 250 | const struct bt_integer_range *range_j = |
| 251 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX( |
| 252 | range_set, j); |
| 253 | |
| 254 | if (i == j) { |
| 255 | continue; |
| 256 | } |
| 257 | |
| 258 | if (range_i->lower.u <= range_j->upper.u && |
| 259 | range_j->lower.u <= range_i->upper.u) { |
| 260 | has_overlap = true; |
| 261 | goto end; |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | end: |
| 267 | return has_overlap; |
| 268 | } |
| 269 | |
| 270 | BT_HIDDEN |
| 271 | bool bt_integer_range_set_signed_has_overlaps( |
| 272 | const struct bt_integer_range_set *range_set) |
| 273 | { |
| 274 | uint64_t i, j; |
| 275 | bool has_overlap = false; |
| 276 | |
| 277 | BT_ASSERT(range_set); |
| 278 | |
| 279 | for (i = 0; i < range_set->ranges->len; i++) { |
| 280 | const struct bt_integer_range *range_i = |
| 281 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX(range_set, i); |
| 282 | |
| 283 | for (j = 0; j < range_set->ranges->len; j++) { |
| 284 | const struct bt_integer_range *range_j = |
| 285 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX( |
| 286 | range_set, j); |
| 287 | |
| 288 | if (i == j) { |
| 289 | continue; |
| 290 | } |
| 291 | |
| 292 | if (range_i->lower.i <= range_j->upper.i && |
| 293 | range_j->lower.i <= range_i->upper.i) { |
| 294 | has_overlap = true; |
| 295 | goto end; |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | end: |
| 301 | return has_overlap; |
| 302 | } |
| 303 | |
| 304 | static |
| 305 | bool compare_range_sets(const struct bt_integer_range_set *range_set_a, |
| 306 | const struct bt_integer_range_set *range_set_b) |
| 307 | { |
| 308 | uint64_t a_i, b_i; |
| 309 | bool is_equal = true; |
| 310 | |
| 311 | BT_ASSERT_DBG(range_set_a); |
| 312 | BT_ASSERT_DBG(range_set_b); |
| 313 | |
| 314 | if (range_set_a == range_set_b) { |
| 315 | goto end; |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * Not super effective for the moment: do a O(N²) compare, also |
| 320 | * checking that the sizes match. |
| 321 | */ |
| 322 | if (range_set_a->ranges->len != range_set_b->ranges->len) { |
| 323 | is_equal = false; |
| 324 | goto end; |
| 325 | } |
| 326 | |
| 327 | for (a_i = 0; a_i < range_set_a->ranges->len; a_i++) { |
| 328 | const struct bt_integer_range *range_a = |
| 329 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX(range_set_a, |
| 330 | a_i); |
| 331 | bool b_has_range = false; |
| 332 | |
| 333 | for (b_i = 0; b_i < range_set_b->ranges->len; b_i++) { |
| 334 | const struct bt_integer_range *range_b = |
| 335 | BT_INTEGER_RANGE_SET_RANGE_AT_INDEX( |
| 336 | range_set_b, b_i); |
| 337 | |
| 338 | if (compare_ranges(range_a, range_b)) { |
| 339 | b_has_range = true; |
| 340 | break; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | if (!b_has_range) { |
| 345 | is_equal = false; |
| 346 | goto end; |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | end: |
| 351 | return is_equal; |
| 352 | } |
| 353 | |
| 354 | bt_bool bt_integer_range_set_unsigned_is_equal( |
| 355 | const struct bt_integer_range_set_unsigned *range_set_a, |
| 356 | const struct bt_integer_range_set_unsigned *range_set_b) |
| 357 | { |
| 358 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-set-a", range_set_a, |
| 359 | "Range set A"); |
| 360 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-set-b", range_set_b, |
| 361 | "Range set B"); |
| 362 | return (bt_bool) compare_range_sets((const void *) range_set_a, |
| 363 | (const void *) range_set_b); |
| 364 | } |
| 365 | |
| 366 | bt_bool bt_integer_range_set_signed_is_equal( |
| 367 | const struct bt_integer_range_set_signed *range_set_a, |
| 368 | const struct bt_integer_range_set_signed *range_set_b) |
| 369 | { |
| 370 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-set-a", range_set_a, |
| 371 | "Range set A"); |
| 372 | BT_ASSERT_PRE_DEV_NON_NULL("integer-range-set-b", range_set_b, |
| 373 | "Range set B"); |
| 374 | return (bt_bool) compare_range_sets((const void *) range_set_a, |
| 375 | (const void *) range_set_b); |
| 376 | } |
| 377 | |
| 378 | void bt_integer_range_set_unsigned_get_ref( |
| 379 | const struct bt_integer_range_set_unsigned *range_set) |
| 380 | { |
| 381 | bt_object_get_ref(range_set); |
| 382 | } |
| 383 | |
| 384 | void bt_integer_range_set_unsigned_put_ref( |
| 385 | const struct bt_integer_range_set_unsigned *range_set) |
| 386 | { |
| 387 | bt_object_put_ref(range_set); |
| 388 | } |
| 389 | |
| 390 | void bt_integer_range_set_signed_get_ref( |
| 391 | const struct bt_integer_range_set_signed *range_set) |
| 392 | { |
| 393 | bt_object_get_ref(range_set); |
| 394 | } |
| 395 | |
| 396 | void bt_integer_range_set_signed_put_ref( |
| 397 | const struct bt_integer_range_set_signed *range_set) |
| 398 | { |
| 399 | bt_object_put_ref(range_set); |
| 400 | } |