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package gojay
// TODO @afiune for now we are using the standard json unmarshaling but in
// the future it would be great to implement one here inside this repo
import "encoding/json"
// DecodeInterface reads the next JSON-encoded value from the decoder's input (io.Reader) and stores it in the value pointed to by i.
//
// i must be an interface poiter
func (dec *Decoder) DecodeInterface(i *interface{}) error {
if dec.isPooled == 1 {
panic(InvalidUsagePooledDecoderError("Invalid usage of pooled decoder"))
}
err := dec.decodeInterface(i)
return err
}
func (dec *Decoder) decodeInterface(i *interface{}) error {
start, end, err := dec.getObject()
if err != nil {
dec.cursor = start
return err
}
// if start & end are equal the object is a null, don't unmarshal
if start == end {
return nil
}
object := dec.data[start:end]
if err = json.Unmarshal(object, i); err != nil {
return err
}
dec.cursor = end
return nil
}
// @afiune Maybe return the type as well?
func (dec *Decoder) getObject() (start int, end int, err error) {
// start cursor
for ; dec.cursor < dec.length || dec.read(); dec.cursor++ {
switch dec.data[dec.cursor] {
case ' ', '\n', '\t', '\r', ',':
continue
// is null
case 'n':
dec.cursor++
err = dec.assertNull()
if err != nil {
return
}
// Set start & end to the same cursor to indicate the object
// is a null and should not be unmarshal
start = dec.cursor
end = dec.cursor
return
case 't':
start = dec.cursor
dec.cursor++
err = dec.assertTrue()
if err != nil {
return
}
end = dec.cursor
dec.cursor++
return
// is false
case 'f':
start = dec.cursor
dec.cursor++
err = dec.assertFalse()
if err != nil {
return
}
end = dec.cursor
dec.cursor++
return
// is an object
case '{':
start = dec.cursor
dec.cursor++
end, err = dec.skipObject()
dec.cursor = end
return
// is string
case '"':
start = dec.cursor
dec.cursor++
start, end, err = dec.getString()
start--
dec.cursor = end
return
// is array
case '[':
start = dec.cursor
dec.cursor++
end, err = dec.skipArray()
dec.cursor = end
return
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-':
start = dec.cursor
end, err = dec.skipNumber()
dec.cursor = end
return
default:
err = dec.raiseInvalidJSONErr(dec.cursor)
return
}
}
err = dec.raiseInvalidJSONErr(dec.cursor)
return
}
// Add Values functions
// AddInterface decodes the JSON value within an object or an array to a interface{}.
func (dec *Decoder) AddInterface(v *interface{}) error {
return dec.Interface(v)
}
// Interface decodes the JSON value within an object or an array to an interface{}.
func (dec *Decoder) Interface(value *interface{}) error {
err := dec.decodeInterface(value)
if err != nil {
return err
}
dec.called |= 1
return nil
}
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