Method encodeMapStringString

json/encode.go:520–584

(b []byte, p unsafe.Pointer)

}

func (e encoder) encodeMapStringString(b []byte, p unsafe.Pointer) ([]byte, error) {
	m := *(*map[string]string)(p)
	if m == nil {
		return append(b, "null"...), nil
	}

	if (e.flags & SortMapKeys) == 0 {
		// Optimized code path when the program does not need the map keys to be
		// sorted.
		b = append(b, '{')

		if len(m) != 0 {
			i := 0

			for k, v := range m {
				if i != 0 {
					b = append(b, ',')
				}

				// encodeString never returns an error so we ignore it here
				b, _ = e.encodeString(b, unsafe.Pointer(&k))
				b = append(b, ':')
				b, _ = e.encodeString(b, unsafe.Pointer(&v))

				i++
			}
		}

		b = append(b, '}')
		return b, nil
	}

	s := mapslicePool.Get().(*mapslice)
	if cap(s.elements) < len(m) {
		s.elements = make([]element, 0, align(10, uintptr(len(m))))
	}
	for key, val := range m {
		v := val
		s.elements = append(s.elements, element{key: key, val: &v})
	}
	sort.Sort(s)

	b = append(b, '{')

	for i, elem := range s.elements {
		if i != 0 {
			b = append(b, ',')
		}

		// encodeString never returns an error so we ignore it here
		b, _ = e.encodeString(b, unsafe.Pointer(&elem.key))
		b = append(b, ':')
		b, _ = e.encodeString(b, unsafe.Pointer(elem.val.(*string)))
	}

	for i := range s.elements {
		s.elements[i] = element{}
	}