73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
#include <string.h>
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#include "records.h"
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#include "covid_types.h"
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int ens_records_iterator_init_range(record_iterator_t* iterator,
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record_sequence_number_t* opt_start,
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record_sequence_number_t* opt_end) {
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iterator->sn_next = opt_start ? *opt_start : get_oldest_sequence_number();
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iterator->sn_end = opt_end ? *opt_end : get_latest_sequence_number();
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if (get_num_contacts() == 0) {
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iterator->finished = true; // no contacts -> no iteration :)
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}
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return 0;
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}
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record_t* ens_records_iterator_next(record_iterator_t* iter) {
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if (iter->finished) {
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return NULL;
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}
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record_t* next = NULL;
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// What is this?
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while (next == NULL) {
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contact_t contact;
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// try to load the next contact
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int res = load_contact(&contact, iter->sn_next);
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if (!res) {
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next = &iter->current;
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memcpy(&next->associated_encrypted_metadata, &contact.associated_encrypted_metadata, sizeof(associated_encrypted_metadata_t));
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memcpy(&next->rolling_proximity_identifier, &contact.rolling_proximity_identifier, sizeof(rolling_proximity_identifier_t));
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memcpy(&next->rssi, &contact.max_rssi, sizeof(rssi_t));
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memcpy(&next->sn, &iter->sn_next, sizeof(record_sequence_number_t));
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// TODO lome: timestamp?
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}
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if (sn_equal(iter->sn_next, iter->sn_end)) {
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iter->finished = true; // this iterator will finish after this execution
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} else {
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// increase the current sn
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iter->sn_next = sn_increment(iter->sn_next);
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}
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}
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return next;
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}
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int ens_record_iterator_clear(record_iterator_t* iter) {
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// TODO: memclear iter->current ?
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//
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iter->finished = true;
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return 0;
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}
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uint8_t ens_records_iterate_with_callback(record_iterator_t* iter, ens_record_iterator_cb_t cb, void* userdata) {
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record_t* cur = ens_records_iterator_next(iter);
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bool cont = true;
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while (cur != NULL && cont) {
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int cb_res = cb(cur, userdata);
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if (cb_res == ENS_RECORD_ITER_STOP) {
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cont = false;
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}
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}
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if (cont) {
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cb(NULL, userdata); // we call the callback one last time but with null data
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}
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return 0;
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} |