et-nik / binngo

import "io"

func decodeMap(reader io.Reader, v interface{}) error {

	sz, rSize, err := readSize(reader)

	if err != nil {

		return err

	}

	cnt, rCount, err := readSize(reader)

	if err != nil {

		return err

	}

	return decodeMapItems(reader, v, sz, rSize+rCount, cnt)

}

func decodeMapItems(reader io.Reader, v interface{}, size int, wasRead readLen, items int) error {

	readItems := 0

	readPosition := wasRead

	for readItems < items && readPosition < readLen(size) {

		key, read, err := readMapKey(reader)

		if err != nil {

			return err

		}

		readPosition += read

		t, read, err := readType(reader)

		if err != nil {

			return err

		}

		readPosition += read

		val, err := readValue(t, reader)

		if err != nil {

			return err

		}

		readPosition += readLen(len(val))

		err = addMapItem(key, t, val, v)

		if err != nil {

			return err

		}

		readItems++

	}

	return nil

}