Method nextEncoded

postgres/parser/json/encoded.go:234–265

()

}

func (e *encodedObjectIterator) nextEncoded() (
	nextKey []byte,
	nextJEntry jEntry,
	nextVal []byte,
	ok bool,
	err error,
) {
	if e.idx >= e.len {
		return nil, jEntry{}, nil, false, nil
	}

	// Recall the layout of an encoded object:
	// [ container header ] [ all key JEntries ] [ all value JEntries ] [ all key data ] [ all value data ].
	nextKeyJEntry, err := getJEntryAt(e.data, containerHeaderLen+e.idx*jEntryLen, e.curKeyIdx)
	if err != nil {
		return nil, jEntry{}, nil, false, err
	}
	nextKeyData := e.data[e.keyOffset+e.curKeyIdx : e.keyOffset+e.curKeyIdx+int(nextKeyJEntry.length)]

	offsetFromBeginningOfData := e.curValueIdx + e.valueOffset - e.keyOffset

	nextValueJEntry, err := getJEntryAt(e.data, containerHeaderLen+(e.idx+e.len)*jEntryLen, offsetFromBeginningOfData)
	if err != nil {
		return nil, jEntry{}, nil, false, err
	}
	nextValueData := e.data[e.valueOffset+e.curValueIdx : e.valueOffset+e.curValueIdx+int(nextValueJEntry.length)]

	e.idx++
	e.curKeyIdx += int(nextKeyJEntry.length)
	e.curValueIdx += int(nextValueJEntry.length)
	return nextKeyData, nextValueJEntry, nextValueData, true, nil
}

// iterObject iterates through all the keys and values of an encoded object
// without requiring decoding of all of them.