feat: Waku v2 bridge

Issue #12610

vendor/zombiezen.com/go/sqlite/sqlitex/query.go

@@ -0,0 +1,82 @@
+// Copyright 2021 Ross Light
+// SPDX-License-Identifier: ISC
+
+package sqlitex
+
+import (
+	"errors"
+
+	"zombiezen.com/go/sqlite"
+)
+
+var errNoResults = errors.New("sqlite: statement has no results")
+var errMultipleResults = errors.New("sqlite: statement has multiple result rows")
+
+func resultSetup(stmt *sqlite.Stmt) error {
+	hasRow, err := stmt.Step()
+	if err != nil {
+		stmt.Reset()
+		return err
+	}
+	if !hasRow {
+		stmt.Reset()
+		return errNoResults
+	}
+	return nil
+}
+
+func resultTeardown(stmt *sqlite.Stmt) error {
+	hasRow, err := stmt.Step()
+	if err != nil {
+		stmt.Reset()
+		return err
+	}
+	if hasRow {
+		stmt.Reset()
+		return errMultipleResults
+	}
+	return stmt.Reset()
+}
+
+func ResultBool(stmt *sqlite.Stmt) (bool, error) {
+	res, err := ResultInt64(stmt)
+	return res != 0, err
+}
+
+func ResultInt(stmt *sqlite.Stmt) (int, error) {
+	res, err := ResultInt64(stmt)
+	return int(res), err
+}
+
+func ResultInt64(stmt *sqlite.Stmt) (int64, error) {
+	if err := resultSetup(stmt); err != nil {
+		return 0, err
+	}
+	res := stmt.ColumnInt64(0)
+	if err := resultTeardown(stmt); err != nil {
+		return 0, err
+	}
+	return res, nil
+}
+
+func ResultText(stmt *sqlite.Stmt) (string, error) {
+	if err := resultSetup(stmt); err != nil {
+		return "", err
+	}
+	res := stmt.ColumnText(0)
+	if err := resultTeardown(stmt); err != nil {
+		return "", err
+	}
+	return res, nil
+}
+
+func ResultFloat(stmt *sqlite.Stmt) (float64, error) {
+	if err := resultSetup(stmt); err != nil {
+		return 0, err
+	}
+	res := stmt.ColumnFloat(0)
+	if err := resultTeardown(stmt); err != nil {
+		return 0, err
+	}
+	return res, nil
+}