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normalize.go
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normalize.go
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// Copyright 2017 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package json
import (
"encoding/json"
"fmt"
"reflect"
"unsafe"
"github.com/juju/errors"
)
func normalize(in interface{}) (j JSON, err error) {
switch t := in.(type) {
case nil:
j.TypeCode = TypeCodeLiteral
j.I64 = int64(LiteralNil)
case bool:
j.TypeCode = TypeCodeLiteral
if t {
j.I64 = int64(LiteralTrue)
} else {
j.I64 = int64(LiteralFalse)
}
case int64:
j.TypeCode = TypeCodeInt64
j.I64 = t
case uint64:
j.TypeCode = TypeCodeUint64
j.I64 = *(*int64)(unsafe.Pointer(&t))
case float64:
j.TypeCode = TypeCodeFloat64
*(*float64)(unsafe.Pointer(&j.I64)) = t
case json.Number:
if i64, errTp := t.Int64(); errTp == nil {
j.TypeCode = TypeCodeInt64
j.I64 = i64
} else {
var f64 float64
f64, err = t.Float64()
j.TypeCode = TypeCodeFloat64
*(*float64)(unsafe.Pointer(&j.I64)) = f64
}
case string:
j.TypeCode = TypeCodeString
j.Str = t
case JSON:
j = t
case map[string]JSON:
j.TypeCode = TypeCodeObject
j.Object = t
case map[string]interface{}:
j.TypeCode = TypeCodeObject
j.Object = make(map[string]JSON, len(t))
for key, value := range t {
if j.Object[key], err = normalize(value); err != nil {
return
}
}
case []JSON:
j.TypeCode = TypeCodeArray
j.Array = t
case []interface{}:
j.TypeCode = TypeCodeArray
j.Array = make([]JSON, 0, len(t))
for _, elem := range t {
var elem1 JSON
elem1, err = normalize(elem)
if err != nil {
return j, err
}
j.Array = append(j.Array, elem1)
}
default:
msg := fmt.Sprintf(unknownTypeErrorMsg, reflect.TypeOf(in))
err = errors.New(msg)
}
return
}