/
safe_value.go
46 lines (42 loc) · 1.57 KB
/
safe_value.go
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// Copyright 2024 The Cockroach Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0
package script
import (
"github.com/cockroachdb/cdc-sink/internal/util/crep"
"github.com/dop251/goja"
)
// The maximum safe numeric value in JavaScript.
const maxInt = 1 << 53
// safeValue returns a JS runtime value that contains the given value
// as though it had been stringified and then parsed.
//
// Numbers will be converted to a string representation to ensure
// minimum loss of fidelity when round-tripped through the userscript.
// If the user actually wants to perform math in JavaScript, the Number
// API is available, or the JS idiom of `+value` can be used.
//
// Goja does not, yet, have builtin support for BigInt. If and when this
// happens, we should revisit this code to emit the numbers as such.
func safeValue(rt *goja.Runtime, value any) (goja.Value, error) {
if jsVal, ok := value.(goja.Value); ok {
return jsVal, nil
}
canon, err := crep.Canonical(value)
if err != nil {
return nil, err
}
return rt.ToValue(canon), nil
}