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Fix null value for struct field

This commit is contained in:
Masaaki Goshima 2020-08-08 13:20:42 +09:00
parent 4f06b13b6b
commit 69573d1b74
5 changed files with 92 additions and 5 deletions
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21
decode_array.go
View File

@ -20,6 +20,11 @@ func (d *arrayDecoder) decodeStream(s *stream, p uintptr) error {
for {
switch s.char() {
case ' ', '\n', '\t', '\r':
case 'n':
if err := nullBytes(s); err != nil {
return err
}
return nil
case '[':
idx := 0
for {
@ -63,6 +68,22 @@ func (d *arrayDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, error
switch buf[cursor] {
case ' ', '\n', '\t', '\r':
continue
case 'n':
buflen := int64(len(buf))
if cursor+3 >= buflen {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+1] != 'u' {
return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
}
if buf[cursor+2] != 'l' {
return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
}
if buf[cursor+3] != 'l' {
return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
}
cursor += 4
return cursor, nil
case '[':
idx := 0
for {

28
decode_map.go
View File

@ -47,7 +47,14 @@ func (d *mapDecoder) setValueStream(s *stream, key interface{}) error {
func (d *mapDecoder) decodeStream(s *stream, p uintptr) error {
s.skipWhiteSpace()
if s.char() != '{' {
switch s.char() {
case 'n':
if err := nullBytes(s); err != nil {
return err
}
return nil
case '{':
default:
return errExpected("{ character for map value", s.totalOffset())
}
mapValue := makemap(d.mapType, 0)
@ -94,7 +101,24 @@ func (d *mapDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, error)
if buflen < 2 {
return 0, errExpected("{} for map", cursor)
}
if buf[cursor] != '{' {
switch buf[cursor] {
case 'n':
if cursor+3 >= buflen {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+1] != 'u' {
return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
}
if buf[cursor+2] != 'l' {
return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
}
if buf[cursor+3] != 'l' {
return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
}
cursor += 4
return cursor, nil
case '{':
default:
return 0, errExpected("{ character for map value", cursor)
}
cursor++

21
decode_slice.go
View File

@ -62,6 +62,11 @@ func (d *sliceDecoder) decodeStream(s *stream, p uintptr) error {
case ' ', '\n', '\t', '\r':
s.cursor++
continue
case 'n':
if err := nullBytes(s); err != nil {
return err
}
return nil
case '[':
idx := 0
slice := d.newSlice()
@ -136,6 +141,22 @@ func (d *sliceDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, error
switch buf[cursor] {
case ' ', '\n', '\t', '\r':
continue
case 'n':
buflen := int64(len(buf))
if cursor+3 >= buflen {
return 0, errUnexpectedEndOfJSON("null", cursor)
}
if buf[cursor+1] != 'u' {
return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
}
if buf[cursor+2] != 'l' {
return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
}
if buf[cursor+3] != 'l' {
return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
}
cursor += 4
return cursor, nil
case '[':
idx := 0
slice := d.newSlice()

20
decode_test.go
View File

@ -135,12 +135,26 @@ func Test_Decoder(t *testing.T) {
assertEq(t, "struct.D.AA", 2, v.D.AA)
assertEq(t, "struct.D.BB", "world", v.D.BB)
assertEq(t, "struct.D.CC", true, v.D.CC)
t.Run("struct.null", func(t *testing.T) {
t.Run("struct.field null", func(t *testing.T) {
var v struct {
A string
B []string
C []int
D map[string]interface{}
E [2]string
F interface{}
}
assertErr(t, json.Unmarshal([]byte(`{"a":null}`), &v))
assertEq(t, "string is null", v.A, "")
assertErr(t, json.Unmarshal([]byte(`{"a":null,"b":null,"c":null,"d":null,"e":null,"f":null}`), &v))
assertEq(t, "string", v.A, "")
assertNeq(t, "[]string", v.B, nil)
assertEq(t, "[]string", len(v.B), 0)
assertNeq(t, "[]int", v.C, nil)
assertEq(t, "[]int", len(v.C), 0)
assertNeq(t, "map", v.D, nil)
assertEq(t, "map", len(v.D), 0)
assertNeq(t, "array", v.E, nil)
assertEq(t, "array", len(v.E), 2)
assertEq(t, "interface{}", v.F, nil)
})
})
t.Run("interface", func(t *testing.T) {

7
helper_test.go
View File

@ -15,3 +15,10 @@ func assertEq(t *testing.T, msg string, exp interface{}, act interface{}) {
t.Fatalf("failed to test for %s. exp=[%v] but act=[%v]", msg, exp, act)
}
}
func assertNeq(t *testing.T, msg string, exp interface{}, act interface{}) {
t.Helper()
if exp == act {
t.Fatalf("failed to test for %s. expected value is not [%v] but got same value", msg, act)
}
}