make optional the second argument to SQLite3.status

and fully document the method.

ext/sqlite3/sqlite3.c

@@ -85,11 +85,30 @@ threadsafe_p(VALUE UNUSED(klass))
     return INT2NUM(sqlite3_threadsafe());
 }
 
+/*
+ * call-seq:
+ *   status(parameter) → Hash
+ *   status(parameter, reset_flag = false) → Hash
+ *
+ * Queries the SQLite3 library for run-time status information. Passing a truthy +reset_flag+ will
+ * reset the highwater mark to the current value.
+ *
+ * [Parameters]
+ * - +parameter+ (Integer, SQLite3::Constants::Status): The status parameter to query.
+ * - +reset_flag+ (Boolean): Whether to reset the highwater mark. (default is +false+)
+ *
+ * [Returns]
+ * A Hash containing +:current+ and +:highwater+ keys for integer values.
+ */
 static VALUE
-status_p(VALUE UNUSED(klass), VALUE opArg, VALUE resetFlagArg)
+rb_sqlite3_status(int argc, VALUE *argv, VALUE klass)
 {
+    VALUE opArg, resetFlagArg;
+
+    rb_scan_args(argc, argv, "11", &opArg, &resetFlagArg);
+
     int op = NUM2INT(opArg);
-    bool resetFlag = TYPE(resetFlagArg) == T_TRUE;
+    bool resetFlag = RTEST(resetFlagArg);
 
     int pCurrent = 0;
     int pHighwater = 0;
@@ -98,6 +117,7 @@ status_p(VALUE UNUSED(klass), VALUE opArg, VALUE resetFlagArg)
     VALUE hash = rb_hash_new();
     rb_hash_aset(hash, ID2SYM(rb_intern("current")), INT2FIX(pCurrent));
     rb_hash_aset(hash, ID2SYM(rb_intern("highwater")), INT2FIX(pHighwater));
+
     return hash;
 }
 
@@ -180,7 +200,7 @@ Init_sqlite3_native(void)
     rb_define_singleton_method(mSqlite3, "sqlcipher?", using_sqlcipher, 0);
     rb_define_singleton_method(mSqlite3, "libversion", libversion, 0);
     rb_define_singleton_method(mSqlite3, "threadsafe", threadsafe_p, 0);
-    rb_define_singleton_method(mSqlite3, "status", status_p, 2);
+    rb_define_singleton_method(mSqlite3, "status", rb_sqlite3_status, -1);
     rb_define_const(mSqlite3, "SQLITE_VERSION", rb_str_new2(SQLITE_VERSION));
     rb_define_const(mSqlite3, "SQLITE_VERSION_NUMBER", INT2FIX(SQLITE_VERSION_NUMBER));
     rb_define_const(mSqlite3, "SQLITE_LOADED_VERSION", rb_str_new2(sqlite3_libversion()));

test/test_sqlite3.rb

@@ -23,9 +23,19 @@ def test_compiled_version_and_loaded_version
     end
 
     def test_status
+      status = SQLite3.status(SQLite3::Constants::Status::MEMORY_USED)
+      assert_operator(status.fetch(:current), :>=, 0)
+      assert_operator(status.fetch(:highwater), :>=, status.fetch(:current))
+    end
+
+    def test_status_reset_highwater_mark
       status = SQLite3.status(SQLite3::Constants::Status::MEMORY_USED, false)
-      assert_not_nil(status.fetch(:current))
-      assert_not_nil(status.fetch(:highwater))
+      assert_operator(status.fetch(:current), :>=, 0)
+      assert_operator(status.fetch(:highwater), :>=, status.fetch(:current))
+
+      status = SQLite3.status(SQLite3::Constants::Status::MEMORY_USED, true)
+      assert_operator(status.fetch(:current), :>=, 0)
+      assert_operator(status.fetch(:highwater), :>=, status.fetch(:current))
     end
   end
 end