status-go/vendor/github.com/francoispqt/gojay/decode.go

387 lines
9.9 KiB
Go

package gojay
import (
"fmt"
"io"
)
// UnmarshalJSONArray parses the JSON-encoded data and stores the result in the value pointed to by v.
//
// v must implement UnmarshalerJSONArray.
//
// If a JSON value is not appropriate for a given target type, or if a JSON number
// overflows the target type, UnmarshalJSONArray skips that field and completes the unmarshaling as best it can.
func UnmarshalJSONArray(data []byte, v UnmarshalerJSONArray) error {
dec := borrowDecoder(nil, 0)
defer dec.Release()
dec.data = make([]byte, len(data))
copy(dec.data, data)
dec.length = len(data)
_, err := dec.decodeArray(v)
if err != nil {
return err
}
if dec.err != nil {
return dec.err
}
return nil
}
// UnmarshalJSONObject parses the JSON-encoded data and stores the result in the value pointed to by v.
//
// v must implement UnmarshalerJSONObject.
//
// If a JSON value is not appropriate for a given target type, or if a JSON number
// overflows the target type, UnmarshalJSONObject skips that field and completes the unmarshaling as best it can.
func UnmarshalJSONObject(data []byte, v UnmarshalerJSONObject) error {
dec := borrowDecoder(nil, 0)
defer dec.Release()
dec.data = make([]byte, len(data))
copy(dec.data, data)
dec.length = len(data)
_, err := dec.decodeObject(v)
if err != nil {
return err
}
if dec.err != nil {
return dec.err
}
return nil
}
// Unmarshal parses the JSON-encoded data and stores the result in the value pointed to by v.
// If v is nil, not an implementation of UnmarshalerJSONObject or UnmarshalerJSONArray or not one of the following types:
// *string, **string, *int, **int, *int8, **int8, *int16, **int16, *int32, **int32, *int64, **int64, *uint8, **uint8, *uint16, **uint16,
// *uint32, **uint32, *uint64, **uint64, *float64, **float64, *float32, **float32, *bool, **bool
// Unmarshal returns an InvalidUnmarshalError.
//
//
// If a JSON value is not appropriate for a given target type, or if a JSON number
// overflows the target type, Unmarshal skips that field and completes the unmarshaling as best it can.
// If no more serious errors are encountered, Unmarshal returns an UnmarshalTypeError describing the earliest such error.
// In any case, it's not guaranteed that all the remaining fields following the problematic one will be unmarshaled into the target object.
func Unmarshal(data []byte, v interface{}) error {
var err error
var dec *Decoder
switch vt := v.(type) {
case *string:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeString(vt)
case **string:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeStringNull(vt)
case *int:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt(vt)
case **int:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeIntNull(vt)
case *int8:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt8(vt)
case **int8:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt8Null(vt)
case *int16:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt16(vt)
case **int16:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt16Null(vt)
case *int32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt32(vt)
case **int32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt32Null(vt)
case *int64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt64(vt)
case **int64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeInt64Null(vt)
case *uint8:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint8(vt)
case **uint8:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint8Null(vt)
case *uint16:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint16(vt)
case **uint16:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint16Null(vt)
case *uint32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint32(vt)
case **uint32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint32Null(vt)
case *uint64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint64(vt)
case **uint64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeUint64Null(vt)
case *float64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeFloat64(vt)
case **float64:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeFloat64Null(vt)
case *float32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeFloat32(vt)
case **float32:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeFloat32Null(vt)
case *bool:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeBool(vt)
case **bool:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = data
err = dec.decodeBoolNull(vt)
case UnmarshalerJSONObject:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = make([]byte, len(data))
copy(dec.data, data)
_, err = dec.decodeObject(vt)
case UnmarshalerJSONArray:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = make([]byte, len(data))
copy(dec.data, data)
_, err = dec.decodeArray(vt)
case *interface{}:
dec = borrowDecoder(nil, 0)
dec.length = len(data)
dec.data = make([]byte, len(data))
copy(dec.data, data)
err = dec.decodeInterface(vt)
default:
return InvalidUnmarshalError(fmt.Sprintf(invalidUnmarshalErrorMsg, vt))
}
defer dec.Release()
if err != nil {
return err
}
return dec.err
}
// UnmarshalerJSONObject is the interface to implement to decode a JSON Object.
type UnmarshalerJSONObject interface {
UnmarshalJSONObject(*Decoder, string) error
NKeys() int
}
// UnmarshalerJSONArray is the interface to implement to decode a JSON Array.
type UnmarshalerJSONArray interface {
UnmarshalJSONArray(*Decoder) error
}
// A Decoder reads and decodes JSON values from an input stream.
type Decoder struct {
r io.Reader
data []byte
err error
isPooled byte
called byte
child byte
cursor int
length int
keysDone int
arrayIndex int
}
// Decode reads the next JSON-encoded value from the decoder's input (io.Reader) and stores it in the value pointed to by v.
//
// See the documentation for Unmarshal for details about the conversion of JSON into a Go value.
// The differences between Decode and Unmarshal are:
// - Decode reads from an io.Reader in the Decoder, whereas Unmarshal reads from a []byte
// - Decode leaves to the user the option of borrowing and releasing a Decoder, whereas Unmarshal internally always borrows a Decoder and releases it when the unmarshaling is completed
func (dec *Decoder) Decode(v interface{}) error {
if dec.isPooled == 1 {
panic(InvalidUsagePooledDecoderError("Invalid usage of pooled decoder"))
}
var err error
switch vt := v.(type) {
case *string:
err = dec.decodeString(vt)
case **string:
err = dec.decodeStringNull(vt)
case *int:
err = dec.decodeInt(vt)
case **int:
err = dec.decodeIntNull(vt)
case *int8:
err = dec.decodeInt8(vt)
case **int8:
err = dec.decodeInt8Null(vt)
case *int16:
err = dec.decodeInt16(vt)
case **int16:
err = dec.decodeInt16Null(vt)
case *int32:
err = dec.decodeInt32(vt)
case **int32:
err = dec.decodeInt32Null(vt)
case *int64:
err = dec.decodeInt64(vt)
case **int64:
err = dec.decodeInt64Null(vt)
case *uint8:
err = dec.decodeUint8(vt)
case **uint8:
err = dec.decodeUint8Null(vt)
case *uint16:
err = dec.decodeUint16(vt)
case **uint16:
err = dec.decodeUint16Null(vt)
case *uint32:
err = dec.decodeUint32(vt)
case **uint32:
err = dec.decodeUint32Null(vt)
case *uint64:
err = dec.decodeUint64(vt)
case **uint64:
err = dec.decodeUint64Null(vt)
case *float64:
err = dec.decodeFloat64(vt)
case **float64:
err = dec.decodeFloat64Null(vt)
case *float32:
err = dec.decodeFloat32(vt)
case **float32:
err = dec.decodeFloat32Null(vt)
case *bool:
err = dec.decodeBool(vt)
case **bool:
err = dec.decodeBoolNull(vt)
case UnmarshalerJSONObject:
_, err = dec.decodeObject(vt)
case UnmarshalerJSONArray:
_, err = dec.decodeArray(vt)
case *EmbeddedJSON:
err = dec.decodeEmbeddedJSON(vt)
case *interface{}:
err = dec.decodeInterface(vt)
default:
return InvalidUnmarshalError(fmt.Sprintf(invalidUnmarshalErrorMsg, vt))
}
if err != nil {
return err
}
return dec.err
}
// Non exported
func isDigit(b byte) bool {
switch b {
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
return true
default:
return false
}
}
func (dec *Decoder) read() bool {
if dec.r != nil {
// if we reach the end, double the buffer to ensure there's always more space
if len(dec.data) == dec.length {
nLen := dec.length * 2
if nLen == 0 {
nLen = 512
}
Buf := make([]byte, nLen, nLen)
copy(Buf, dec.data)
dec.data = Buf
}
var n int
var err error
for n == 0 {
n, err = dec.r.Read(dec.data[dec.length:])
if err != nil {
if err != io.EOF {
dec.err = err
return false
}
if n == 0 {
return false
}
dec.length = dec.length + n
return true
}
}
dec.length = dec.length + n
return true
}
return false
}
func (dec *Decoder) nextChar() byte {
for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
switch dec.data[dec.cursor] {
case ' ', '\n', '\t', '\r', ',':
continue
}
d := dec.data[dec.cursor]
return d
}
return 0
}