gotosocial/vendor/github.com/bytedance/sonic/ast/node.go

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2023-02-25 12:12:40 +00:00
/*
* Copyright 2021 ByteDance 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,
* 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.
*/
package ast
import (
`encoding/json`
`fmt`
`strconv`
`unsafe`
`reflect`
`github.com/bytedance/sonic/internal/native/types`
`github.com/bytedance/sonic/internal/rt`
)
const (
_CAP_BITS = 32
_LEN_MASK = 1 << _CAP_BITS - 1
_NODE_SIZE = unsafe.Sizeof(Node{})
_PAIR_SIZE = unsafe.Sizeof(Pair{})
)
const (
_V_NONE types.ValueType = 0
_V_NODE_BASE types.ValueType = 1 << 5
_V_LAZY types.ValueType = 1 << 7
_V_RAW types.ValueType = 1 << 8
_V_NUMBER = _V_NODE_BASE + 1
_V_ANY = _V_NODE_BASE + 2
_V_ARRAY_LAZY = _V_LAZY | types.V_ARRAY
_V_OBJECT_LAZY = _V_LAZY | types.V_OBJECT
_MASK_LAZY = _V_LAZY - 1
_MASK_RAW = _V_RAW - 1
)
const (
V_NONE = 0
V_ERROR = 1
V_NULL = 2
V_TRUE = 3
V_FALSE = 4
V_ARRAY = 5
V_OBJECT = 6
V_STRING = 7
V_NUMBER = int(_V_NUMBER)
V_ANY = int(_V_ANY)
)
var (
byteType = rt.UnpackType(reflect.TypeOf(byte(0)))
)
type Node struct {
v int64
t types.ValueType
p unsafe.Pointer
}
// UnmarshalJSON is just an adapter to json.Unmarshaler.
// If you want better performance, use Searcher.GetByPath() directly
func (self *Node) UnmarshalJSON(data []byte) (err error) {
*self, err = NewSearcher(string(data)).GetByPath()
return
}
/** Node Type Accessor **/
// Type returns json type represented by the node
// It will be one of belows:
// V_NONE = 0 (empty node)
// V_ERROR = 1 (error node)
// V_NULL = 2 (json value `null`)
// V_TRUE = 3 (json value `true`)
// V_FALSE = 4 (json value `false`)
// V_ARRAY = 5 (json value array)
// V_OBJECT = 6 (json value object)
// V_STRING = 7 (json value string)
// V_NUMBER = 33 (json value number )
// V_ANY = 34 (golang interface{})
func (self Node) Type() int {
return int(self.t & _MASK_LAZY & _MASK_RAW)
}
func (self Node) itype() types.ValueType {
return self.t & _MASK_LAZY & _MASK_RAW
}
// Exists returns false only if the self is nil or empty node V_NONE
func (self *Node) Exists() bool {
return self != nil && self.t != _V_NONE
}
// Valid reports if self is NOT V_ERROR or nil
func (self *Node) Valid() bool {
if self == nil {
return false
}
return self.t != V_ERROR
}
// Check checks if the node itself is valid, and return:
// - ErrNotFound If the node is nil
// - Its underlying error If the node is V_ERROR
func (self *Node) Check() error {
if self == nil {
return ErrNotExist
} else if self.t != V_ERROR {
return nil
} else {
return self
}
}
// Error returns error message if the node is invalid
func (self Node) Error() string {
if self.t != V_ERROR {
return ""
} else {
return *(*string)(self.p)
}
}
// IsRaw returns true if node's underlying value is raw json
func (self Node) IsRaw() bool {
return self.t&_V_RAW != 0
}
func (self *Node) isLazy() bool {
return self != nil && self.t&_V_LAZY != 0
}
func (self *Node) isAny() bool {
return self != nil && self.t == _V_ANY
}
/** Simple Value Methods **/
// Raw returns json representation of the node,
func (self *Node) Raw() (string, error) {
if !self.IsRaw() {
buf, err := self.MarshalJSON()
return rt.Mem2Str(buf), err
}
return rt.StrFrom(self.p, self.v), nil
}
func (self *Node) checkRaw() error {
if err := self.Check(); err != nil {
return err
}
if self.IsRaw() {
self.parseRaw(false)
}
return nil
}
// Bool returns bool value represented by this node,
// including types.V_TRUE|V_FALSE|V_NUMBER|V_STRING|V_ANY|V_NULL,
// V_NONE will return error
func (self *Node) Bool() (bool, error) {
if err := self.checkRaw(); err != nil {
return false, err
}
switch self.t {
case types.V_TRUE : return true , nil
case types.V_FALSE : return false, nil
case types.V_NULL : return false, nil
case _V_NUMBER :
if i, err := numberToInt64(self); err == nil {
return i != 0, nil
} else if f, err := numberToFloat64(self); err == nil {
return f != 0, nil
} else {
return false, err
}
case types.V_STRING: return strconv.ParseBool(rt.StrFrom(self.p, self.v))
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case bool : return v, nil
case int : return v != 0, nil
case int8 : return v != 0, nil
case int16 : return v != 0, nil
case int32 : return v != 0, nil
case int64 : return v != 0, nil
case uint : return v != 0, nil
case uint8 : return v != 0, nil
case uint16 : return v != 0, nil
case uint32 : return v != 0, nil
case uint64 : return v != 0, nil
case float32: return v != 0, nil
case float64: return v != 0, nil
case string : return strconv.ParseBool(v)
case json.Number:
if i, err := v.Int64(); err == nil {
return i != 0, nil
} else if f, err := v.Float64(); err == nil {
return f != 0, nil
} else {
return false, err
}
default: return false, ErrUnsupportType
}
default : return false, ErrUnsupportType
}
}
// Int64 casts the node to int64 value,
// including V_NUMBER|V_TRUE|V_FALSE|V_ANY|V_STRING
// V_NONE it will return error
func (self *Node) Int64() (int64, error) {
if err := self.checkRaw(); err != nil {
return 0, err
}
switch self.t {
case _V_NUMBER, types.V_STRING :
if i, err := numberToInt64(self); err == nil {
return i, nil
} else if f, err := numberToFloat64(self); err == nil {
return int64(f), nil
} else {
return 0, err
}
case types.V_TRUE : return 1, nil
case types.V_FALSE : return 0, nil
case types.V_NULL : return 0, nil
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case bool : if v { return 1, nil } else { return 0, nil }
case int : return int64(v), nil
case int8 : return int64(v), nil
case int16 : return int64(v), nil
case int32 : return int64(v), nil
case int64 : return int64(v), nil
case uint : return int64(v), nil
case uint8 : return int64(v), nil
case uint16 : return int64(v), nil
case uint32 : return int64(v), nil
case uint64 : return int64(v), nil
case float32: return int64(v), nil
case float64: return int64(v), nil
case string :
if i, err := strconv.ParseInt(v, 10, 64); err == nil {
return i, nil
} else if f, err := strconv.ParseFloat(v, 64); err == nil {
return int64(f), nil
} else {
return 0, err
}
case json.Number:
if i, err := v.Int64(); err == nil {
return i, nil
} else if f, err := v.Float64(); err == nil {
return int64(f), nil
} else {
return 0, err
}
default: return 0, ErrUnsupportType
}
default : return 0, ErrUnsupportType
}
}
// StrictInt64 exports underlying int64 value, including V_NUMBER, V_ANY
func (self *Node) StrictInt64() (int64, error) {
if err := self.checkRaw(); err != nil {
return 0, err
}
switch self.t {
case _V_NUMBER : return numberToInt64(self)
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case int : return int64(v), nil
case int8 : return int64(v), nil
case int16 : return int64(v), nil
case int32 : return int64(v), nil
case int64 : return int64(v), nil
case uint : return int64(v), nil
case uint8 : return int64(v), nil
case uint16: return int64(v), nil
case uint32: return int64(v), nil
case uint64: return int64(v), nil
case json.Number:
if i, err := v.Int64(); err == nil {
return i, nil
} else {
return 0, err
}
default: return 0, ErrUnsupportType
}
default : return 0, ErrUnsupportType
}
}
func castNumber(v bool) json.Number {
if v {
return json.Number("1")
} else {
return json.Number("0")
}
}
// Number casts node to float64,
// including V_NUMBER|V_TRUE|V_FALSE|V_ANY|V_STRING|V_NULL,
// V_NONE it will return error
func (self *Node) Number() (json.Number, error) {
if err := self.checkRaw(); err != nil {
return json.Number(""), err
}
switch self.t {
case _V_NUMBER : return toNumber(self) , nil
case types.V_STRING :
if _, err := numberToInt64(self); err == nil {
return toNumber(self), nil
} else if _, err := numberToFloat64(self); err == nil {
return toNumber(self), nil
} else {
return json.Number(""), err
}
case types.V_TRUE : return json.Number("1"), nil
case types.V_FALSE : return json.Number("0"), nil
case types.V_NULL : return json.Number("0"), nil
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case bool : return castNumber(v), nil
case int : return castNumber(v != 0), nil
case int8 : return castNumber(v != 0), nil
case int16 : return castNumber(v != 0), nil
case int32 : return castNumber(v != 0), nil
case int64 : return castNumber(v != 0), nil
case uint : return castNumber(v != 0), nil
case uint8 : return castNumber(v != 0), nil
case uint16 : return castNumber(v != 0), nil
case uint32 : return castNumber(v != 0), nil
case uint64 : return castNumber(v != 0), nil
case float32: return castNumber(v != 0), nil
case float64: return castNumber(v != 0), nil
case string :
if _, err := strconv.ParseFloat(v, 64); err == nil {
return json.Number(v), nil
} else {
return json.Number(""), err
}
case json.Number: return v, nil
default: return json.Number(""), ErrUnsupportType
}
default : return json.Number(""), ErrUnsupportType
}
}
// Number exports underlying float64 value, including V_NUMBER, V_ANY of json.Number
func (self *Node) StrictNumber() (json.Number, error) {
if err := self.checkRaw(); err != nil {
return json.Number(""), err
}
switch self.t {
case _V_NUMBER : return toNumber(self) , nil
case _V_ANY :
if v, ok := self.packAny().(json.Number); ok {
return v, nil
} else {
return json.Number(""), ErrUnsupportType
}
default : return json.Number(""), ErrUnsupportType
}
}
// String cast node to string,
// including V_NUMBER|V_TRUE|V_FALSE|V_ANY|V_STRING|V_NULL,
// V_NONE it will return error
func (self *Node) String() (string, error) {
if err := self.checkRaw(); err != nil {
return "", err
}
switch self.t {
case types.V_NULL : return "" , nil
case types.V_TRUE : return "true" , nil
case types.V_FALSE : return "false", nil
case types.V_STRING, _V_NUMBER : return rt.StrFrom(self.p, self.v), nil
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case bool : return strconv.FormatBool(v), nil
case int : return strconv.Itoa(v), nil
case int8 : return strconv.Itoa(int(v)), nil
case int16 : return strconv.Itoa(int(v)), nil
case int32 : return strconv.Itoa(int(v)), nil
case int64 : return strconv.Itoa(int(v)), nil
case uint : return strconv.Itoa(int(v)), nil
case uint8 : return strconv.Itoa(int(v)), nil
case uint16 : return strconv.Itoa(int(v)), nil
case uint32 : return strconv.Itoa(int(v)), nil
case uint64 : return strconv.Itoa(int(v)), nil
case float32: return strconv.FormatFloat(float64(v), 'g', -1, 64), nil
case float64: return strconv.FormatFloat(float64(v), 'g', -1, 64), nil
case string : return v, nil
case json.Number: return v.String(), nil
default: return "", ErrUnsupportType
}
default : return "" , ErrUnsupportType
}
}
// StrictString returns string value (unescaped), includeing V_STRING, V_ANY of string.
// In other cases, it will return empty string.
func (self *Node) StrictString() (string, error) {
if err := self.checkRaw(); err != nil {
return "", err
}
switch self.t {
case types.V_STRING : return rt.StrFrom(self.p, self.v), nil
case _V_ANY :
if v, ok := self.packAny().(string); ok {
return v, nil
} else {
return "", ErrUnsupportType
}
default : return "", ErrUnsupportType
}
}
// Float64 cast node to float64,
// including V_NUMBER|V_TRUE|V_FALSE|V_ANY|V_STRING|V_NULL,
// V_NONE it will return error
func (self *Node) Float64() (float64, error) {
if err := self.checkRaw(); err != nil {
return 0.0, err
}
switch self.t {
case _V_NUMBER, types.V_STRING : return numberToFloat64(self)
case types.V_TRUE : return 1.0, nil
case types.V_FALSE : return 0.0, nil
case types.V_NULL : return 0.0, nil
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case bool :
if v {
return 1.0, nil
} else {
return 0.0, nil
}
case int : return float64(v), nil
case int8 : return float64(v), nil
case int16 : return float64(v), nil
case int32 : return float64(v), nil
case int64 : return float64(v), nil
case uint : return float64(v), nil
case uint8 : return float64(v), nil
case uint16 : return float64(v), nil
case uint32 : return float64(v), nil
case uint64 : return float64(v), nil
case float32: return float64(v), nil
case float64: return float64(v), nil
case string :
if f, err := strconv.ParseFloat(v, 64); err == nil {
return float64(f), nil
} else {
return 0, err
}
case json.Number:
if f, err := v.Float64(); err == nil {
return float64(f), nil
} else {
return 0, err
}
default : return 0, ErrUnsupportType
}
default : return 0.0, ErrUnsupportType
}
}
// Float64 exports underlying float64 value, includeing V_NUMBER, V_ANY
func (self *Node) StrictFloat64() (float64, error) {
if err := self.checkRaw(); err != nil {
return 0.0, err
}
switch self.t {
case _V_NUMBER : return numberToFloat64(self)
case _V_ANY :
any := self.packAny()
switch v := any.(type) {
case float32 : return float64(v), nil
case float64 : return float64(v), nil
default : return 0, ErrUnsupportType
}
default : return 0.0, ErrUnsupportType
}
}
/** Sequencial Value Methods **/
// Len returns children count of a array|object|string node
// For partially loaded node, it also works but only counts the parsed children
func (self *Node) Len() (int, error) {
if err := self.checkRaw(); err != nil {
return 0, err
}
if self.t == types.V_ARRAY || self.t == types.V_OBJECT || self.t == _V_ARRAY_LAZY || self.t == _V_OBJECT_LAZY {
return int(self.v & _LEN_MASK), nil
} else if self.t == types.V_STRING {
return int(self.v), nil
} else if self.t == _V_NONE || self.t == types.V_NULL {
return 0, nil
} else {
return 0, ErrUnsupportType
}
}
func (self Node) len() int {
return int(self.v & _LEN_MASK)
}
// Cap returns malloc capacity of a array|object node for children
func (self *Node) Cap() (int, error) {
if err := self.checkRaw(); err != nil {
return 0, err
}
if self.t == types.V_ARRAY || self.t == types.V_OBJECT || self.t == _V_ARRAY_LAZY || self.t == _V_OBJECT_LAZY {
return int(self.v >> _CAP_BITS), nil
} else if self.t == _V_NONE || self.t == types.V_NULL {
return 0, nil
} else {
return 0, ErrUnsupportType
}
}
func (self Node) cap() int {
return int(self.v >> _CAP_BITS)
}
// Set sets the node of given key under self, and reports if the key has existed.
//
// If self is V_NONE or V_NULL, it becomes V_OBJECT and sets the node at the key.
func (self *Node) Set(key string, node Node) (bool, error) {
if self != nil && (self.t == _V_NONE || self.t == types.V_NULL) {
*self = NewObject([]Pair{{key, node}})
return false, nil
}
if err := node.Check(); err != nil {
return false, err
}
p := self.Get(key)
if !p.Exists() {
l := self.len()
c := self.cap()
if l == c {
// TODO: maybe change append size in future
c += _DEFAULT_NODE_CAP
mem := unsafe_NewArray(_PAIR_TYPE, c)
memmove(mem, self.p, _PAIR_SIZE * uintptr(l))
self.p = mem
}
v := self.pairAt(l)
v.Key = key
v.Value = node
self.setCapAndLen(c, l+1)
return false, nil
} else if err := p.Check(); err != nil {
return false, err
}
*p = node
return true, nil
}
// SetAny wraps val with V_ANY node, and Set() the node.
func (self *Node) SetAny(key string, val interface{}) (bool, error) {
return self.Set(key, NewAny(val))
}
// Unset remove the node of given key under object parent, and reports if the key has existed.
func (self *Node) Unset(key string) (bool, error) {
self.must(types.V_OBJECT, "an object")
p, i := self.skipKey(key)
if !p.Exists() {
return false, nil
} else if err := p.Check(); err != nil {
return false, err
}
self.removePair(i)
return true, nil
}
// SetByIndex sets the node of given index, and reports if the key has existed.
//
// The index must be within self's children.
func (self *Node) SetByIndex(index int, node Node) (bool, error) {
if err := node.Check(); err != nil {
return false, err
}
p := self.Index(index)
if !p.Exists() {
return false, ErrNotExist
} else if err := p.Check(); err != nil {
return false, err
}
*p = node
return true, nil
}
// SetAny wraps val with V_ANY node, and SetByIndex() the node.
func (self *Node) SetAnyByIndex(index int, val interface{}) (bool, error) {
return self.SetByIndex(index, NewAny(val))
}
// UnsetByIndex remove the node of given index
func (self *Node) UnsetByIndex(index int) (bool, error) {
var p *Node
it := self.itype()
if it == types.V_ARRAY {
p = self.Index(index)
}else if it == types.V_OBJECT {
pr := self.skipIndexPair(index)
if pr == nil {
return false, ErrNotExist
}
p = &pr.Value
} else {
return false, ErrUnsupportType
}
if !p.Exists() {
return false, ErrNotExist
}
if it == types.V_ARRAY {
self.removeNode(index)
}else if it == types.V_OBJECT {
self.removePair(index)
}
return true, nil
}
// Add appends the given node under self.
//
// If self is V_NONE or V_NULL, it becomes V_ARRAY and sets the node at index 0.
func (self *Node) Add(node Node) error {
if self != nil && (self.t == _V_NONE || self.t == types.V_NULL) {
*self = NewArray([]Node{node})
return nil
}
if err := self.should(types.V_ARRAY, "an array"); err != nil {
return err
}
if err := self.skipAllIndex(); err != nil {
return err
}
var p rt.GoSlice
p.Cap = self.cap()
p.Len = self.len()
p.Ptr = self.p
s := *(*[]Node)(unsafe.Pointer(&p))
s = append(s, node)
self.p = unsafe.Pointer(&s[0])
self.setCapAndLen(cap(s), len(s))
return nil
}
// SetAny wraps val with V_ANY node, and Add() the node.
func (self *Node) AddAny(val interface{}) error {
return self.Add(NewAny(val))
}
// GetByPath load given path on demands,
// which only ensure nodes before this path got parsed.
//
// Note, the api expects the json is well-formed at least,
// otherwise it may return unexpected result.
func (self *Node) GetByPath(path ...interface{}) *Node {
if !self.Valid() {
return self
}
var s = self
for _, p := range path {
switch p := p.(type) {
case int:
s = s.Index(p)
if !s.Valid() {
return s
}
case string:
s = s.Get(p)
if !s.Valid() {
return s
}
default:
panic("path must be either int or string")
}
}
return s
}
// Get loads given key of an object node on demands
func (self *Node) Get(key string) *Node {
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return unwrapError(err)
}
n, _ := self.skipKey(key)
return n
}
// Index indexies node at given idx,
// node type CAN be either V_OBJECT or V_ARRAY
func (self *Node) Index(idx int) *Node {
if err := self.checkRaw(); err != nil {
return unwrapError(err)
}
it := self.itype()
if it == types.V_ARRAY {
return self.skipIndex(idx)
}else if it == types.V_OBJECT {
pr := self.skipIndexPair(idx)
if pr == nil {
return newError(_ERR_NOT_FOUND, "value not exists")
}
return &pr.Value
} else {
return newError(_ERR_UNSUPPORT_TYPE, fmt.Sprintf("unsupported type: %v", self.itype()))
}
}
// IndexPair indexies pair at given idx,
// node type MUST be either V_OBJECT
func (self *Node) IndexPair(idx int) *Pair {
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return nil
}
return self.skipIndexPair(idx)
}
// IndexOrGet firstly use idx to index a value and check if its key matches
// If not, then use the key to search value
func (self *Node) IndexOrGet(idx int, key string) *Node {
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return unwrapError(err)
}
pr := self.skipIndexPair(idx)
if pr != nil && pr.Key == key {
return &pr.Value
}
n, _ := self.skipKey(key)
return n
}
/** Generic Value Converters **/
// Map loads all keys of an object node
func (self *Node) Map() (map[string]interface{}, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.(map[string]interface{}); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return nil, err
}
if err := self.loadAllKey(); err != nil {
return nil, err
}
return self.toGenericObject()
}
// MapUseNumber loads all keys of an object node, with numeric nodes casted to json.Number
func (self *Node) MapUseNumber() (map[string]interface{}, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.(map[string]interface{}); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return nil, err
}
if err := self.loadAllKey(); err != nil {
return nil, err
}
return self.toGenericObjectUseNumber()
}
// MapUseNode scans both parsed and non-parsed chidren nodes,
// and map them by their keys
func (self *Node) MapUseNode() (map[string]Node, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.(map[string]Node); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return nil, err
}
if err := self.skipAllKey(); err != nil {
return nil, err
}
return self.toGenericObjectUseNode()
}
// MapUnsafe exports the underlying pointer to its children map
// WARN: don't use it unless you know what you are doing
func (self *Node) UnsafeMap() ([]Pair, error) {
if err := self.should(types.V_OBJECT, "an object"); err != nil {
return nil, err
}
if err := self.skipAllKey(); err != nil {
return nil, err
}
s := rt.Ptr2SlicePtr(self.p, int(self.len()), self.cap())
return *(*[]Pair)(s), nil
}
// SortKeys sorts children of a V_OBJECT node in ascending key-order.
// If recurse is true, it recursively sorts children's children as long as a V_OBJECT node is found.
func (self *Node) SortKeys(recurse bool) (err error) {
ps, err := self.UnsafeMap()
if err != nil {
return err
}
PairSlice(ps).Sort()
if recurse {
var sc Scanner
sc = func(path Sequence, node *Node) bool {
if node.itype() == types.V_OBJECT {
if err := node.SortKeys(recurse); err != nil {
return false
}
}
if node.itype() == types.V_ARRAY {
if err := node.ForEach(sc); err != nil {
return false
}
}
return true
}
self.ForEach(sc)
}
return nil
}
// Array loads all indexes of an array node
func (self *Node) Array() ([]interface{}, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.([]interface{}); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_ARRAY, "an array"); err != nil {
return nil, err
}
if err := self.loadAllIndex(); err != nil {
return nil, err
}
return self.toGenericArray()
}
// ArrayUseNumber loads all indexes of an array node, with numeric nodes casted to json.Number
func (self *Node) ArrayUseNumber() ([]interface{}, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.([]interface{}); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_ARRAY, "an array"); err != nil {
return nil, err
}
if err := self.loadAllIndex(); err != nil {
return nil, err
}
return self.toGenericArrayUseNumber()
}
// ArrayUseNode copys both parsed and non-parsed chidren nodes,
// and indexes them by original order
func (self *Node) ArrayUseNode() ([]Node, error) {
if self.isAny() {
any := self.packAny()
if v, ok := any.([]Node); ok {
return v, nil
} else {
return nil, ErrUnsupportType
}
}
if err := self.should(types.V_ARRAY, "an array"); err != nil {
return nil, err
}
if err := self.skipAllIndex(); err != nil {
return nil, err
}
return self.toGenericArrayUseNode()
}
// ArrayUnsafe exports the underlying pointer to its children array
// WARN: don't use it unless you know what you are doing
func (self *Node) UnsafeArray() ([]Node, error) {
if err := self.should(types.V_ARRAY, "an array"); err != nil {
return nil, err
}
if err := self.skipAllIndex(); err != nil {
return nil, err
}
s := rt.Ptr2SlicePtr(self.p, self.len(), self.cap())
return *(*[]Node)(s), nil
}
// Interface loads all children under all pathes from this node,
// and converts itself as generic type.
// WARN: all numberic nodes are casted to float64
func (self *Node) Interface() (interface{}, error) {
if err := self.checkRaw(); err != nil {
return nil, err
}
switch self.t {
case V_ERROR : return nil, self.Check()
case types.V_NULL : return nil, nil
case types.V_TRUE : return true, nil
case types.V_FALSE : return false, nil
case types.V_ARRAY : return self.toGenericArray()
case types.V_OBJECT : return self.toGenericObject()
case types.V_STRING : return rt.StrFrom(self.p, self.v), nil
case _V_NUMBER :
v, err := numberToFloat64(self)
if err != nil {
return nil, err
}
return v, nil
case _V_ARRAY_LAZY :
if err := self.loadAllIndex(); err != nil {
return nil, err
}
return self.toGenericArray()
case _V_OBJECT_LAZY :
if err := self.loadAllKey(); err != nil {
return nil, err
}
return self.toGenericObject()
case _V_ANY:
switch v := self.packAny().(type) {
case Node : return v.Interface()
case *Node: return v.Interface()
default : return v, nil
}
default : return nil, ErrUnsupportType
}
}
func (self *Node) packAny() interface{} {
return *(*interface{})(self.p)
}
// InterfaceUseNumber works same with Interface()
// except numberic nodes are casted to json.Number
func (self *Node) InterfaceUseNumber() (interface{}, error) {
if err := self.checkRaw(); err != nil {
return nil, err
}
switch self.t {
case V_ERROR : return nil, self.Check()
case types.V_NULL : return nil, nil
case types.V_TRUE : return true, nil
case types.V_FALSE : return false, nil
case types.V_ARRAY : return self.toGenericArrayUseNumber()
case types.V_OBJECT : return self.toGenericObjectUseNumber()
case types.V_STRING : return rt.StrFrom(self.p, self.v), nil
case _V_NUMBER : return toNumber(self), nil
case _V_ARRAY_LAZY :
if err := self.loadAllIndex(); err != nil {
return nil, err
}
return self.toGenericArrayUseNumber()
case _V_OBJECT_LAZY :
if err := self.loadAllKey(); err != nil {
return nil, err
}
return self.toGenericObjectUseNumber()
case _V_ANY : return self.packAny(), nil
default : return nil, ErrUnsupportType
}
}
// InterfaceUseNode clone itself as a new node,
// or its children as map[string]Node (or []Node)
func (self *Node) InterfaceUseNode() (interface{}, error) {
if err := self.checkRaw(); err != nil {
return nil, err
}
switch self.t {
case types.V_ARRAY : return self.toGenericArrayUseNode()
case types.V_OBJECT : return self.toGenericObjectUseNode()
case _V_ARRAY_LAZY :
if err := self.skipAllIndex(); err != nil {
return nil, err
}
return self.toGenericArrayUseNode()
case _V_OBJECT_LAZY :
if err := self.skipAllKey(); err != nil {
return nil, err
}
return self.toGenericObjectUseNode()
default : return *self, self.Check()
}
}
// LoadAll loads all the node's children and children's children as parsed.
// After calling it, the node can be safely used on concurrency
func (self *Node) LoadAll() error {
if self.IsRaw() {
self.parseRaw(true)
return self.Check()
}
switch self.itype() {
case types.V_ARRAY:
e := self.len()
if err := self.loadAllIndex(); err != nil {
return err
}
for i := 0; i < e; i++ {
n := self.nodeAt(i)
if n.IsRaw() {
n.parseRaw(true)
}
if err := n.Check(); err != nil {
return err
}
}
return nil
case types.V_OBJECT:
e := self.len()
if err := self.loadAllKey(); err != nil {
return err
}
for i := 0; i < e; i++ {
n := self.pairAt(i)
if n.Value.IsRaw() {
n.Value.parseRaw(true)
}
if err := n.Value.Check(); err != nil {
return err
}
}
return nil
default:
return self.Check()
}
}
// Load loads the node's children as parsed.
// After calling it, only the node itself can be used on concurrency (not include its children)
func (self *Node) Load() error {
if self.IsRaw() {
self.parseRaw(false)
return self.Load()
}
switch self.t {
case _V_ARRAY_LAZY:
return self.skipAllIndex()
case _V_OBJECT_LAZY:
return self.skipAllKey()
default:
return self.Check()
}
}
/**---------------------------------- Internal Helper Methods ----------------------------------**/
var (
_NODE_TYPE = rt.UnpackEface(Node{}).Type
_PAIR_TYPE = rt.UnpackEface(Pair{}).Type
)
func (self *Node) setCapAndLen(cap int, len int) {
if self.t == types.V_ARRAY || self.t == types.V_OBJECT || self.t == _V_ARRAY_LAZY || self.t == _V_OBJECT_LAZY {
self.v = int64(len&_LEN_MASK | cap<<_CAP_BITS)
} else {
panic("value does not have a length")
}
}
func (self *Node) unsafe_next() *Node {
return (*Node)(unsafe.Pointer(uintptr(unsafe.Pointer(self)) + _NODE_SIZE))
}
func (self *Pair) unsafe_next() *Pair {
return (*Pair)(unsafe.Pointer(uintptr(unsafe.Pointer(self)) + _PAIR_SIZE))
}
func (self *Node) must(t types.ValueType, s string) {
if err := self.checkRaw(); err != nil {
panic(err)
}
if err := self.Check(); err != nil {
panic(err)
}
if self.itype() != t {
panic("value cannot be represented as " + s)
}
}
func (self *Node) should(t types.ValueType, s string) error {
if err := self.checkRaw(); err != nil {
return err
}
if self.itype() != t {
return ErrUnsupportType
}
return nil
}
func (self *Node) nodeAt(i int) *Node {
var p = self.p
if self.isLazy() {
_, stack := self.getParserAndArrayStack()
p = *(*unsafe.Pointer)(unsafe.Pointer(&stack.v))
}
return (*Node)(unsafe.Pointer(uintptr(p) + uintptr(i)*_NODE_SIZE))
}
func (self *Node) pairAt(i int) *Pair {
var p = self.p
if self.isLazy() {
_, stack := self.getParserAndObjectStack()
p = *(*unsafe.Pointer)(unsafe.Pointer(&stack.v))
}
return (*Pair)(unsafe.Pointer(uintptr(p) + uintptr(i)*_PAIR_SIZE))
}
func (self *Node) getParserAndArrayStack() (*Parser, *parseArrayStack) {
stack := (*parseArrayStack)(self.p)
ret := (*rt.GoSlice)(unsafe.Pointer(&stack.v))
ret.Len = self.len()
ret.Cap = self.cap()
return &stack.parser, stack
}
func (self *Node) getParserAndObjectStack() (*Parser, *parseObjectStack) {
stack := (*parseObjectStack)(self.p)
ret := (*rt.GoSlice)(unsafe.Pointer(&stack.v))
ret.Len = self.len()
ret.Cap = self.cap()
return &stack.parser, stack
}
func (self *Node) skipAllIndex() error {
if !self.isLazy() {
return nil
}
var err types.ParsingError
parser, stack := self.getParserAndArrayStack()
parser.skipValue = true
parser.noLazy = true
*self, err = parser.decodeArray(stack.v)
if err != 0 {
return parser.ExportError(err)
}
return nil
}
func (self *Node) skipAllKey() error {
if !self.isLazy() {
return nil
}
var err types.ParsingError
parser, stack := self.getParserAndObjectStack()
parser.skipValue = true
parser.noLazy = true
*self, err = parser.decodeObject(stack.v)
if err != 0 {
return parser.ExportError(err)
}
return nil
}
func (self *Node) skipKey(key string) (*Node, int) {
nb := self.len()
lazy := self.isLazy()
if nb > 0 {
/* linear search */
var p *Pair
if lazy {
s := (*parseObjectStack)(self.p)
p = &s.v[0]
} else {
p = (*Pair)(self.p)
}
if p.Key == key {
return &p.Value, 0
}
for i := 1; i < nb; i++ {
p = p.unsafe_next()
if p.Key == key {
return &p.Value, i
}
}
}
/* not found */
if !lazy {
return nil, -1
}
// lazy load
for last, i := self.skipNextPair(), nb; last != nil; last, i = self.skipNextPair(), i+1 {
if last.Value.Check() != nil {
return &last.Value, -1
}
if last.Key == key {
return &last.Value, i
}
}
return nil, -1
}
func (self *Node) skipIndex(index int) *Node {
nb := self.len()
if nb > index {
v := self.nodeAt(index)
return v
}
if !self.isLazy() {
return nil
}
// lazy load
for last := self.skipNextNode(); last != nil; last = self.skipNextNode(){
if last.Check() != nil {
return last
}
if self.len() > index {
return last
}
}
return nil
}
func (self *Node) skipIndexPair(index int) *Pair {
nb := self.len()
if nb > index {
return self.pairAt(index)
}
if !self.isLazy() {
return nil
}
// lazy load
for last := self.skipNextPair(); last != nil; last = self.skipNextPair(){
if last.Value.Check() != nil {
return last
}
if self.len() > index {
return last
}
}
return nil
}
func (self *Node) loadAllIndex() error {
if !self.isLazy() {
return nil
}
var err types.ParsingError
parser, stack := self.getParserAndArrayStack()
parser.noLazy = true
*self, err = parser.decodeArray(stack.v)
if err != 0 {
return parser.ExportError(err)
}
return nil
}
func (self *Node) loadAllKey() error {
if !self.isLazy() {
return nil
}
var err types.ParsingError
parser, stack := self.getParserAndObjectStack()
parser.noLazy = true
*self, err = parser.decodeObject(stack.v)
if err != 0 {
return parser.ExportError(err)
}
return nil
}
func (self *Node) removeNode(i int) {
nb := self.len() - 1
node := self.nodeAt(i)
if i == nb {
self.setCapAndLen(self.cap(), nb)
*node = Node{}
return
}
from := self.nodeAt(i + 1)
memmove(unsafe.Pointer(node), unsafe.Pointer(from), _NODE_SIZE * uintptr(nb - i))
last := self.nodeAt(nb)
*last = Node{}
self.setCapAndLen(self.cap(), nb)
}
func (self *Node) removePair(i int) {
nb := self.len() - 1
node := self.pairAt(i)
if i == nb {
self.setCapAndLen(self.cap(), nb)
*node = Pair{}
return
}
from := self.pairAt(i + 1)
memmove(unsafe.Pointer(node), unsafe.Pointer(from), _PAIR_SIZE * uintptr(nb - i))
last := self.pairAt(nb)
*last = Pair{}
self.setCapAndLen(self.cap(), nb)
}
func (self *Node) toGenericArray() ([]interface{}, error) {
nb := self.len()
ret := make([]interface{}, nb)
if nb == 0 {
return ret, nil
}
/* convert each item */
var p = (*Node)(self.p)
x, err := p.Interface()
if err != nil {
return nil, err
}
ret[0] = x
for i := 1; i < nb; i++ {
p = p.unsafe_next()
x, err := p.Interface()
if err != nil {
return nil, err
}
ret[i] = x
}
/* all done */
return ret, nil
}
func (self *Node) toGenericArrayUseNumber() ([]interface{}, error) {
nb := self.len()
ret := make([]interface{}, nb)
if nb == 0 {
return ret, nil
}
/* convert each item */
var p = (*Node)(self.p)
x, err := p.InterfaceUseNumber()
if err != nil {
return nil, err
}
ret[0] = x
for i := 1; i < nb; i++ {
p = p.unsafe_next()
x, err := p.InterfaceUseNumber()
if err != nil {
return nil, err
}
ret[i] = x
}
/* all done */
return ret, nil
}
func (self *Node) toGenericArrayUseNode() ([]Node, error) {
var nb = self.len()
var out = make([]Node, nb)
if nb == 0 {
return out, nil
}
var p = (*Node)(self.p)
out[0] = *p
if err := p.Check(); err != nil {
return nil, err
}
for i := 1; i < nb; i++ {
p = p.unsafe_next()
if err := p.Check(); err != nil {
return nil, err
}
out[i] = *p
}
return out, nil
}
func (self *Node) toGenericObject() (map[string]interface{}, error) {
nb := self.len()
ret := make(map[string]interface{}, nb)
if nb == 0 {
return ret, nil
}
/* convert each item */
var p = (*Pair)(self.p)
x, err := p.Value.Interface()
if err != nil {
return nil, err
}
ret[p.Key] = x
for i := 1; i < nb; i++ {
p = p.unsafe_next()
x, err := p.Value.Interface()
if err != nil {
return nil, err
}
ret[p.Key] = x
}
/* all done */
return ret, nil
}
func (self *Node) toGenericObjectUseNumber() (map[string]interface{}, error) {
nb := self.len()
ret := make(map[string]interface{}, nb)
if nb == 0 {
return ret, nil
}
/* convert each item */
var p = (*Pair)(self.p)
x, err := p.Value.InterfaceUseNumber()
if err != nil {
return nil, err
}
ret[p.Key] = x
for i := 1; i < nb; i++ {
p = p.unsafe_next()
x, err := p.Value.InterfaceUseNumber()
if err != nil {
return nil, err
}
ret[p.Key] = x
}
/* all done */
return ret, nil
}
func (self *Node) toGenericObjectUseNode() (map[string]Node, error) {
var nb = self.len()
var out = make(map[string]Node, nb)
if nb == 0 {
return out, nil
}
var p = (*Pair)(self.p)
out[p.Key] = p.Value
if err := p.Value.Check(); err != nil {
return nil, err
}
for i := 1; i < nb; i++ {
p = p.unsafe_next()
if err := p.Value.Check(); err != nil {
return nil, err
}
out[p.Key] = p.Value
}
/* all done */
return out, nil
}
/**------------------------------------ Factory Methods ------------------------------------**/
var (
nullNode = Node{t: types.V_NULL}
trueNode = Node{t: types.V_TRUE}
falseNode = Node{t: types.V_FALSE}
emptyArrayNode = Node{t: types.V_ARRAY}
emptyObjectNode = Node{t: types.V_OBJECT}
)
// NewRaw creates a node of raw json, and decides its type by first char.
func NewRaw(json string) Node {
if json == "" {
panic("empty json string")
}
it := switchRawType(json[0])
return newRawNode(json, it)
}
// NewAny creates a node of type V_ANY if any's type isn't Node or *Node,
// which stores interface{} and can be only used for `.Interface()`\`.MarshalJSON()`.
func NewAny(any interface{}) Node {
switch n := any.(type) {
case Node:
return n
case *Node:
return *n
default:
return Node{
t: _V_ANY,
v: 0,
p: unsafe.Pointer(&any),
}
}
}
// NewBytes encodes given src with Base64 (RFC 4648), and creates a node of type V_STRING.
func NewBytes(src []byte) Node {
if len(src) == 0 {
panic("empty src bytes")
}
out := encodeBase64(src)
return NewString(out)
}
// NewNull creates a node of type V_NULL
func NewNull() Node {
return Node{
v: 0,
p: nil,
t: types.V_NULL,
}
}
// NewBool creates a node of type bool:
// If v is true, returns V_TRUE node
// If v is false, returns V_FALSE node
func NewBool(v bool) Node {
var t = types.V_FALSE
if v {
t = types.V_TRUE
}
return Node{
v: 0,
p: nil,
t: t,
}
}
// NewNumber creates a json.Number node
// v must be a decimal string complying with RFC8259
func NewNumber(v string) Node {
return Node{
v: int64(len(v) & _LEN_MASK),
p: rt.StrPtr(v),
t: _V_NUMBER,
}
}
func toNumber(node *Node) json.Number {
return json.Number(rt.StrFrom(node.p, node.v))
}
func numberToFloat64(node *Node) (float64, error) {
ret,err := toNumber(node).Float64()
if err != nil {
return 0, err
}
return ret, nil
}
func numberToInt64(node *Node) (int64, error) {
ret,err := toNumber(node).Int64()
if err != nil {
return 0, err
}
return ret, nil
}
func newBytes(v []byte) Node {
return Node{
t: types.V_STRING,
p: mem2ptr(v),
v: int64(len(v) & _LEN_MASK),
}
}
// NewString creates a node of type V_STRING.
// v is considered to be a valid UTF-8 string,
// which means it won't be validated and unescaped.
// when the node is encoded to json, v will be escaped.
func NewString(v string) Node {
return Node{
t: types.V_STRING,
p: rt.StrPtr(v),
v: int64(len(v) & _LEN_MASK),
}
}
// NewArray creates a node of type V_ARRAY,
// using v as its underlying children
func NewArray(v []Node) Node {
return Node{
t: types.V_ARRAY,
v: int64(len(v)&_LEN_MASK | cap(v)<<_CAP_BITS),
p: *(*unsafe.Pointer)(unsafe.Pointer(&v)),
}
}
func (self *Node) setArray(v []Node) {
self.t = types.V_ARRAY
self.setCapAndLen(cap(v), len(v))
self.p = *(*unsafe.Pointer)(unsafe.Pointer(&v))
}
// NewObject creates a node of type V_OBJECT,
// using v as its underlying children
func NewObject(v []Pair) Node {
return Node{
t: types.V_OBJECT,
v: int64(len(v)&_LEN_MASK | cap(v)<<_CAP_BITS),
p: *(*unsafe.Pointer)(unsafe.Pointer(&v)),
}
}
func (self *Node) setObject(v []Pair) {
self.t = types.V_OBJECT
self.setCapAndLen(cap(v), len(v))
self.p = *(*unsafe.Pointer)(unsafe.Pointer(&v))
}
type parseObjectStack struct {
parser Parser
v []Pair
}
type parseArrayStack struct {
parser Parser
v []Node
}
func newLazyArray(p *Parser, v []Node) Node {
s := new(parseArrayStack)
s.parser = *p
s.v = v
return Node{
t: _V_ARRAY_LAZY,
v: int64(len(v)&_LEN_MASK | cap(v)<<_CAP_BITS),
p: unsafe.Pointer(s),
}
}
func (self *Node) setLazyArray(p *Parser, v []Node) {
s := new(parseArrayStack)
s.parser = *p
s.v = v
self.t = _V_ARRAY_LAZY
self.setCapAndLen(cap(v), len(v))
self.p = (unsafe.Pointer)(s)
}
func newLazyObject(p *Parser, v []Pair) Node {
s := new(parseObjectStack)
s.parser = *p
s.v = v
return Node{
t: _V_OBJECT_LAZY,
v: int64(len(v)&_LEN_MASK | cap(v)<<_CAP_BITS),
p: unsafe.Pointer(s),
}
}
func (self *Node) setLazyObject(p *Parser, v []Pair) {
s := new(parseObjectStack)
s.parser = *p
s.v = v
self.t = _V_OBJECT_LAZY
self.setCapAndLen(cap(v), len(v))
self.p = (unsafe.Pointer)(s)
}
func newRawNode(str string, typ types.ValueType) Node {
return Node{
t: _V_RAW | typ,
p: rt.StrPtr(str),
v: int64(len(str) & _LEN_MASK),
}
}
func (self *Node) parseRaw(full bool) {
raw := rt.StrFrom(self.p, self.v)
parser := NewParser(raw)
if full {
parser.noLazy = true
parser.skipValue = false
}
var e types.ParsingError
*self, e = parser.Parse()
if e != 0 {
*self = *newSyntaxError(parser.syntaxError(e))
}
}
func newError(err types.ParsingError, msg string) *Node {
return &Node{
t: V_ERROR,
v: int64(err),
p: unsafe.Pointer(&msg),
}
}
var typeJumpTable = [256]types.ValueType{
'"' : types.V_STRING,
'-' : _V_NUMBER,
'0' : _V_NUMBER,
'1' : _V_NUMBER,
'2' : _V_NUMBER,
'3' : _V_NUMBER,
'4' : _V_NUMBER,
'5' : _V_NUMBER,
'6' : _V_NUMBER,
'7' : _V_NUMBER,
'8' : _V_NUMBER,
'9' : _V_NUMBER,
'[' : types.V_ARRAY,
'f' : types.V_FALSE,
'n' : types.V_NULL,
't' : types.V_TRUE,
'{' : types.V_OBJECT,
}
func switchRawType(c byte) types.ValueType {
return typeJumpTable[c]
}
func unwrapError(err error) *Node {
if se, ok := err.(*Node); ok {
return se
}else if sse, ok := err.(Node); ok {
return &sse
} else {
msg := err.Error()
return &Node{
t: V_ERROR,
v: 0,
p: unsafe.Pointer(&msg),
}
}
}