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#include <roaring/array_util.h>
#include <roaring/containers/mixed_subset.h>
#ifdef __cplusplus
extern "C" {
namespace roaring {
namespace internal {
#endif
bool array_container_is_subset_bitset(const array_container_t* container1,
const bitset_container_t* container2) {
if (container2->cardinality != BITSET_UNKNOWN_CARDINALITY) {
if (container2->cardinality < container1->cardinality) {
return false;
}
}
for (int i = 0; i < container1->cardinality; ++i) {
if (!bitset_container_contains(container2, container1->array[i])) {
return false;
}
}
return true;
}
bool run_container_is_subset_array(const run_container_t* container1,
const array_container_t* container2) {
if (run_container_cardinality(container1) > container2->cardinality)
return false;
int32_t start_pos = -1, stop_pos = -1;
for (int i = 0; i < container1->n_runs; ++i) {
int32_t start = container1->runs[i].value;
int32_t stop = start + container1->runs[i].length;
start_pos = advanceUntil(container2->array, stop_pos,
container2->cardinality, start);
stop_pos = advanceUntil(container2->array, stop_pos,
container2->cardinality, stop);
if (stop_pos == container2->cardinality) {
return false;
} else if (stop_pos - start_pos != stop - start ||
container2->array[start_pos] != start ||
container2->array[stop_pos] != stop) {
return false;
}
}
return true;
}
bool array_container_is_subset_run(const array_container_t* container1,
const run_container_t* container2) {
if (container1->cardinality > run_container_cardinality(container2))
return false;
int i_array = 0, i_run = 0;
while (i_array < container1->cardinality && i_run < container2->n_runs) {
uint32_t start = container2->runs[i_run].value;
uint32_t stop = start + container2->runs[i_run].length;
if (container1->array[i_array] < start) {
return false;
} else if (container1->array[i_array] > stop) {
i_run++;
} else { // the value of the array is in the run
i_array++;
}
}
if (i_array == container1->cardinality) {
return true;
} else {
return false;
}
}
bool run_container_is_subset_bitset(const run_container_t* container1,
const bitset_container_t* container2) {
// todo: this code could be much faster
if (container2->cardinality != BITSET_UNKNOWN_CARDINALITY) {
if (container2->cardinality < run_container_cardinality(container1)) {
return false;
}
} else {
int32_t card = bitset_container_compute_cardinality(
container2); // modify container2?
if (card < run_container_cardinality(container1)) {
return false;
}
}
for (int i = 0; i < container1->n_runs; ++i) {
uint32_t run_start = container1->runs[i].value;
uint32_t le = container1->runs[i].length;
for (uint32_t j = run_start; j <= run_start + le; ++j) {
if (!bitset_container_contains(container2, j)) {
return false;
}
}
}
return true;
}
bool bitset_container_is_subset_run(const bitset_container_t* container1,
const run_container_t* container2) {
// todo: this code could be much faster
if (container1->cardinality != BITSET_UNKNOWN_CARDINALITY) {
if (container1->cardinality > run_container_cardinality(container2)) {
return false;
}
}
int32_t i_bitset = 0, i_run = 0;
while (i_bitset < BITSET_CONTAINER_SIZE_IN_WORDS &&
i_run < container2->n_runs) {
uint64_t w = container1->words[i_bitset];
while (w != 0 && i_run < container2->n_runs) {
uint32_t start = container2->runs[i_run].value;
uint32_t stop = start + container2->runs[i_run].length;
uint64_t t = w & (~w + 1);
uint16_t r = i_bitset * 64 + roaring_trailing_zeroes(w);
if (r < start) {
return false;
} else if (r > stop) {
i_run++;
continue;
} else {
w ^= t;
}
}
if (w == 0) {
i_bitset++;
} else {
return false;
}
}
if (i_bitset < BITSET_CONTAINER_SIZE_IN_WORDS) {
// terminated iterating on the run containers, check that rest of bitset
// is empty
for (; i_bitset < BITSET_CONTAINER_SIZE_IN_WORDS; i_bitset++) {
if (container1->words[i_bitset] != 0) {
return false;
}
}
}
return true;
}
#ifdef __cplusplus
}
}
} // extern "C" { namespace roaring { namespace internal {
#endif
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