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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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599 changed files with 70746 additions and 66896 deletions
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108
firmware/application/database.cpp
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@ -27,81 +27,69 @@
namespace std {
int database::retrieve_mid_record(MidDBRecord* record, std::string search_term){
file_path = "AIS/mids.db";
index_item_length = 4;
record_length = 32;
int database::retrieve_mid_record(MidDBRecord* record, std::string search_term) {
file_path = "AIS/mids.db";
index_item_length = 4;
record_length = 32;
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
return(result);
return (result);
}
int database::retrieve_airline_record(AirlinesDBRecord* record, std::string search_term){
file_path = "ADSB/airlines.db";
index_item_length = 4;
record_length = 64;
int database::retrieve_airline_record(AirlinesDBRecord* record, std::string search_term) {
file_path = "ADSB/airlines.db";
index_item_length = 4;
record_length = 64;
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
return(result);
return (result);
}
int database::retrieve_aircraft_record(AircraftDBRecord* record, std::string search_term){
int database::retrieve_aircraft_record(AircraftDBRecord* record, std::string search_term) {
file_path = "ADSB/icao24.db";
index_item_length = 7;
record_length = 146;
file_path = "ADSB/icao24.db";
index_item_length = 7;
record_length = 146;
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
result = std::database::retrieve_record(file_path, index_item_length, record_length, record, search_term);
return(result);
return (result);
}
int database::retrieve_record(std::string file_path, int index_item_length, int record_length, void* record, std::string search_term) {
auto result = db_file.open(file_path);
if (!result.is_valid()) {
number_of_records = (db_file.size() / (index_item_length + record_length)); // determine number of records in file
// binary search tree
int first = 0, // First search element
last = number_of_records - 1, // Last search element
middle, // Mid point of search
position = -1; // Position of search value
while (!found && first <= last) {
middle = (first + last) / 2; // Calculate mid point
db_file.seek(middle * index_item_length);
db_file.read(file_buffer, search_term.length());
if (file_buffer == search_term) { // If value is found at mid
found = true;
position = middle;
} else if (file_buffer > search_term) // If value is in lower half
last = middle - 1;
else
first = middle + 1; // If value is in upper half
}
int database::retrieve_record(std::string file_path, int index_item_length, int record_length, void* record, std::string search_term)
{
auto result = db_file.open(file_path);
if (!result.is_valid()) {
number_of_records = (db_file.size() / (index_item_length + record_length)); // determine number of records in file
// binary search tree
int first = 0, // First search element
last = number_of_records - 1, // Last search element
middle, // Mid point of search
position = -1; // Position of search value
while (!found && first <= last) {
middle = (first + last) / 2; // Calculate mid point
db_file.seek(middle * index_item_length);
db_file.read(file_buffer, search_term.length());
if (file_buffer == search_term) { // If value is found at mid
found = true;
position = middle;
}
else if (file_buffer > search_term) // If value is in lower half
last = middle - 1;
else
first = middle + 1; // If value is in upper half
}
if(found == true) {
db_file.seek((number_of_records * index_item_length) + (position * record_length)); // seek starting after index
db_file.read(record, record_length);
return(DATABASE_RECORD_FOUND);
}
else {
return(DATABASE_RECORD_NOT_FOUND);
}
}
else return(DATABASE_NOT_FOUND);
if (found == true) {
db_file.seek((number_of_records * index_item_length) + (position * record_length)); // seek starting after index
db_file.read(record, record_length);
return (DATABASE_RECORD_FOUND);
} else {
return (DATABASE_RECORD_NOT_FOUND);
}
} else
return (DATABASE_NOT_FOUND);
}
} /* namespace std */