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Added example for getHeaderInfo() (#251)

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Patrick Servello 2020-01-01 13:22:40 -06:00 committed by Sébastien Rombauts
parent e6288ee920
commit ab012273de
1 changed files with 37 additions and 0 deletions
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37
examples/example1/main.cpp
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@ -89,6 +89,43 @@ int main ()
std::cout << "SQlite3 version " << SQLite::VERSION << " (" << SQLite::getLibVersion() << ")" << std::endl;
std::cout << "SQliteC++ version " << SQLITECPP_VERSION << std::endl;
////////////////////////////////////////////////////////////////////////////
// Inspect a database via SQLite header information
try
{
SQLite::Header exampleHeader = SQLite::Database::getHeaderInfo(filename_example_db3);
// Print values for all header fields
// Official documentation for fields can be found here: https://www.sqlite.org/fileformat.html#the_database_header
std::cout << "Magic header string: " << exampleHeader.headerStr << std::endl;
std::cout << "Page size bytes: " << exampleHeader.pageSizeBytes << std::endl;
std::cout << "File format write version: " << exampleHeader.fileFormatWriteVersion << std::endl;
std::cout << "File format read version: " << exampleHeader.fileFormatReadVersion << std::endl;
std::cout << "Reserved space bytes: " << exampleHeader.reservedSpaceBytes << std::endl;
std::cout << "Max embedded payload fraction " << exampleHeader.maxEmbeddedPayloadFrac << std::endl;
std::cout << "Min embedded payload fraction: " << exampleHeader.minEmbeddedPayloadFrac << std::endl;
std::cout << "Leaf payload fraction: " << exampleHeader.leafPayloadFrac << std::endl;
std::cout << "File change counter: " << exampleHeader.fileChangeCounter << std::endl;
std::cout << "Database size pages: " << exampleHeader.databaseSizePages << std::endl;
std::cout << "First freelist trunk page: " << exampleHeader.firstFreelistTrunkPage << std::endl;
std::cout << "Total freelist trunk pages: " << exampleHeader.totalFreelistPages << std::endl;
std::cout << "Schema cookie: " << exampleHeader.schemaCookie << std::endl;
std::cout << "Schema format number: " << exampleHeader.schemaFormatNumber << std::endl;
std::cout << "Default page cache size bytes: " << exampleHeader.defaultPageCacheSizeBytes << std::endl;
std::cout << "Largest B tree page number: " << exampleHeader.largestBTreePageNumber << std::endl;
std::cout << "Database text encoding: " << exampleHeader.databaseTextEncoding << std::endl;
std::cout << "User version: " << exampleHeader.userVersion << std::endl;
std::cout << "Incremental vaccum mode: " << exampleHeader.incrementalVaccumMode << std::endl;
std::cout << "Application ID: " << exampleHeader.applicationId << std::endl;
std::cout << "Version valid for: " << exampleHeader.versionValidFor << std::endl;
std::cout << "SQLite version: " << exampleHeader.sqliteVersion << std::endl;
}
catch (std::exception& e)
{
std::cout << "SQLite exception: " << e.what() << std::endl;
return EXIT_FAILURE; // unexpected error : exit the example program
}
////////////////////////////////////////////////////////////////////////////
// Very basic first example (1/7) :
try