forked from pingcap/tidb
/
normalize.go
89 lines (85 loc) · 2.05 KB
/
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(jsonLiteralNil)
case bool:
j.typeCode = typeCodeLiteral
if t {
j.i64 = int64(jsonLiteralTrue)
} else {
j.i64 = int64(jsonLiteralFalse)
}
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, err := t.Int64(); err == nil {
j.typeCode = typeCodeInt64
j.i64 = i64
} else {
f64, _ := 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 {
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
}