/* Add your header comment here */ #include SQLITE_EXTENSION_INIT1 /* ** The half() SQL function returns half of its input value. */ static void halfFunc( sqlite3_context *context, int argc, sqlite3_value **argv ){ sqlite3_result_double(context, 0.5*sqlite3_value_double(argv[0])); } /* SQLite invokes this routine once when it loads the extension. ** Create new functions, collating sequences, and virtual table ** modules here. This is usually the only exported symbol in ** the shared library. */ int sqlite3_extension_init( sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines *pApi ){ SQLITE_EXTENSION_INIT2(pApi) sqlite3_create_function(db, "half", 1, SQLITE_ANY, 0, halfFunc, 0, 0); return 0; }