func (se *sliceEncoder) encode(e *encodeState, v reflect.Value, _ bool) {
if v.IsNil() {
e.WriteString("null")
return
}
se.arrayEnc(e, v, false)
}
func getSetter(outt reflect.Type, out reflect.Value) Setter {
setterMutex.RLock()
style := setterStyle[outt]
setterMutex.RUnlock()
if style == setterNone {
return nil
}
if style == setterUnknown {
setterMutex.Lock()
defer setterMutex.Unlock()
if outt.Implements(setterIface) {
setterStyle[outt] = setterType
} else if reflect.PtrTo(outt).Implements(setterIface) {
setterStyle[outt] = setterAddr
} else {
setterStyle[outt] = setterNone
return nil
}
style = setterStyle[outt]
}
if style == setterAddr {
if !out.CanAddr() {
return nil
}
out = out.Addr()
} else if outt.Kind() == reflect.Ptr && out.IsNil() {
out.Set(reflect.New(outt.Elem()))
}
return out.Interface().(Setter)
}
func (f *decFnInfo) kSlice(rv reflect.Value) {
// A slice can be set from a map or array in stream.
currEncodedType := f.dd.currentEncodedType()
switch currEncodedType {
case valueTypeBytes, valueTypeString:
if f.ti.rtid == uint8SliceTypId || f.ti.rt.Elem().Kind() == reflect.Uint8 {
if bs2, changed2 := f.dd.decodeBytes(rv.Bytes()); changed2 {
rv.SetBytes(bs2)
}
return
}
}
if shortCircuitReflectToFastPath && rv.CanAddr() {
switch f.ti.rtid {
case intfSliceTypId:
f.d.decSliceIntf(rv.Addr().Interface().(*[]interface{}), currEncodedType, f.array)
return
case uint64SliceTypId:
f.d.decSliceUint64(rv.Addr().Interface().(*[]uint64), currEncodedType, f.array)
return
case int64SliceTypId:
f.d.decSliceInt64(rv.Addr().Interface().(*[]int64), currEncodedType, f.array)
return
case strSliceTypId:
f.d.decSliceStr(rv.Addr().Interface().(*[]string), currEncodedType, f.array)
return
}
}
containerLen, containerLenS := decContLens(f.dd, currEncodedType)
// an array can never return a nil slice. so no need to check f.array here.
if rv.IsNil() {
rv.Set(reflect.MakeSlice(f.ti.rt, containerLenS, containerLenS))
}
if containerLen == 0 {
return
}
if rvcap, rvlen := rv.Len(), rv.Cap(); containerLenS > rvcap {
if f.array { // !rv.CanSet()
decErr(msgDecCannotExpandArr, rvcap, containerLenS)
}
rvn := reflect.MakeSlice(f.ti.rt, containerLenS, containerLenS)
if rvlen > 0 {
reflect.Copy(rvn, rv)
}
rv.Set(rvn)
} else if containerLenS > rvlen {
rv.SetLen(containerLenS)
}
for j := 0; j < containerLenS; j++ {
f.d.decodeValue(rv.Index(j))
}
}
func defaultReturnHandler() ReturnHandler {
return func(ctx *Context, vals []reflect.Value) {
rv := ctx.GetVal(inject.InterfaceOf((*http.ResponseWriter)(nil)))
resp := rv.Interface().(http.ResponseWriter)
var respVal reflect.Value
if len(vals) > 1 && vals[0].Kind() == reflect.Int {
resp.WriteHeader(int(vals[0].Int()))
respVal = vals[1]
} else if len(vals) > 0 {
respVal = vals[0]
if isError(respVal) {
err := respVal.Interface().(error)
if err != nil {
ctx.internalServerError(ctx, err)
}
return
} else if canDeref(respVal) {
if respVal.IsNil() {
return // Ignore nil error
}
}
}
if canDeref(respVal) {
respVal = respVal.Elem()
}
if isByteSlice(respVal) {
resp.Write(respVal.Bytes())
} else {
resp.Write([]byte(respVal.String()))
}
}
}
func decodeMapStringInterface(d *decodeState, kind int, v reflect.Value) {
if kind != kindDocument {
d.saveErrorAndSkip(kind, v.Type())
}
if v.IsNil() {
v.Set(reflect.MakeMap(v.Type()))
}
var m map[string]interface{}
switch mm := v.Interface().(type) {
case map[string]interface{}:
m = mm
case M:
m = (map[string]interface{})(mm)
}
offset := d.beginDoc()
for {
kind, name := d.scanKindName()
if kind == 0 {
break
}
if kind == kindNull {
continue
}
m[string(name)] = d.decodeValueInterface(kind)
}
d.endDoc(offset)
}
func isZero(v reflect.Value) bool {
switch v.Kind() {
case reflect.Func, reflect.Map, reflect.Slice:
return v.IsNil()
case reflect.Array:
z := true
for i := 0; i < v.Len(); i++ {
z = z && isZero(v.Index(i))
}
return z
case reflect.Struct:
if v.Type() == reflect.TypeOf(t) {
if v.Interface().(time.Time).IsZero() {
return true
}
return false
}
z := true
for i := 0; i < v.NumField(); i++ {
z = z && isZero(v.Field(i))
}
return z
}
// Compare other types directly:
z := reflect.Zero(v.Type())
return v.Interface() == z.Interface()
}
func (q *queryParser) parseScalar(v url.Values, r reflect.Value, name string, tag reflect.StructTag) error {
switch value := r.Interface().(type) {
case string:
v.Set(name, value)
case []byte:
if !r.IsNil() {
v.Set(name, base64.StdEncoding.EncodeToString(value))
}
case bool:
v.Set(name, strconv.FormatBool(value))
case int64:
v.Set(name, strconv.FormatInt(value, 10))
case int:
v.Set(name, strconv.Itoa(value))
case float64:
v.Set(name, strconv.FormatFloat(value, 'f', -1, 64))
case float32:
v.Set(name, strconv.FormatFloat(float64(value), 'f', -1, 32))
case time.Time:
const ISO8601UTC = "2006-01-02T15:04:05Z"
v.Set(name, value.UTC().Format(ISO8601UTC))
default:
return fmt.Errorf("unsupported value for param %s: %v (%s)", name, r.Interface(), r.Type().Name())
}
return nil
}
func (pe *ptrEncoder) encode(e *encodeState, v reflect.Value, quoted bool) {
if v.IsNil() {
e.WriteString("null")
return
}
pe.elemEnc(e, v.Elem(), quoted)
}
func (f encFnInfo) getValueForMarshalInterface(rv reflect.Value, indir int8) (v interface{}, proceed bool) {
if indir == 0 {
v = rv.Interface()
} else if indir == -1 {
// If a non-pointer was passed to Encode(), then that value is not addressable.
// Take addr if addresable, else copy value to an addressable value.
if rv.CanAddr() {
v = rv.Addr().Interface()
} else {
rv2 := reflect.New(rv.Type())
rv2.Elem().Set(rv)
v = rv2.Interface()
// fmt.Printf("rv.Type: %v, rv2.Type: %v, v: %v\n", rv.Type(), rv2.Type(), v)
}
} else {
for j := int8(0); j < indir; j++ {
if rv.IsNil() {
f.ee.EncodeNil()
return
}
rv = rv.Elem()
}
v = rv.Interface()
}
return v, true
}
// scan the value by fields, and set to v
func rawScanStruct(v reflect.Value, fields []string, scanner rowScaner) (err error) {
if v.IsNil() {
e := fmt.Sprintf("struct can not be nil, but got %#v", v.Interface())
return errors.New(e)
}
dest := make([]interface{}, len(fields))
for v.Kind() == reflect.Ptr {
v = v.Elem()
}
// Loop over column names and find field in s to bind to
// based on column name. all returned columns must match
// a field in the s struct
for x, fieldName := range fields {
f := v.FieldByName(fieldName)
if f == zeroVal {
e := fmt.Sprintf("Scanner: No field %s in type %s",
fieldName, v.Type())
return errors.New(e)
} else {
dest[x] = f.Addr().Interface()
}
}
err = scanner.Scan(dest...)
return
}
func decodeMap(v reflect.Value, x interface{}) {
t := v.Type()
if v.IsNil() {
v.Set(reflect.MakeMap(t))
}
for k, c := range getNode(x) {
i := reflect.New(t.Key()).Elem()
decodeValue(i, k)
w := v.MapIndex(i)
if w.IsValid() { // We have an actual element value to decode into.
if w.Kind() == reflect.Interface {
w = w.Elem()
}
w = reflect.New(w.Type()).Elem()
} else if t.Elem().Kind() != reflect.Interface { // The map's element type is concrete.
w = reflect.New(t.Elem()).Elem()
} else {
// The best we can do here is to decode as either a string (for scalars) or a map[string]interface {} (for the rest).
// We could try to guess the type based on the string (e.g. true/false => bool) but that'll get ugly fast,
// especially if we have to guess the kind (slice vs. array vs. map) and index type (e.g. string, int, etc.)
switch c.(type) {
case node:
w = reflect.MakeMap(stringMapType)
case string:
w = reflect.New(stringType).Elem()
default:
panic("value is neither node nor string")
}
}
decodeValue(w, c)
v.SetMapIndex(i, w)
}
}
// validateType guarantees that the value is valid and assignable to the type.
func (s *state) validateType(value reflect.Value, typ reflect.Type) reflect.Value {
if !value.IsValid() {
if typ == nil || canBeNil(typ) {
// An untyped nil interface{}. Accept as a proper nil value.
return reflect.Zero(typ)
}
s.errorf("invalid value; expected %s", typ)
}
if typ != nil && !value.Type().AssignableTo(typ) {
if value.Kind() == reflect.Interface && !value.IsNil() {
value = value.Elem()
if value.Type().AssignableTo(typ) {
return value
}
// fallthrough
}
// Does one dereference or indirection work? We could do more, as we
// do with method receivers, but that gets messy and method receivers
// are much more constrained, so it makes more sense there than here.
// Besides, one is almost always all you need.
switch {
case value.Kind() == reflect.Ptr && value.Type().Elem().AssignableTo(typ):
value = value.Elem()
if !value.IsValid() {
s.errorf("dereference of nil pointer of type %s", typ)
}
case reflect.PtrTo(value.Type()).AssignableTo(typ) && value.CanAddr():
value = value.Addr()
default:
s.errorf("wrong type for value; expected %s; got %s", typ, value.Type())
}
}
return value
}
// isTrue reports whether the value is 'true', in the sense of not the zero of its type,
// and whether the value has a meaningful truth value.
func isTrue(val reflect.Value) (truth, ok bool) {
if !val.IsValid() {
// Something like var x interface{}, never set. It's a form of nil.
return false, true
}
switch val.Kind() {
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
truth = val.Len() > 0
case reflect.Bool:
truth = val.Bool()
case reflect.Complex64, reflect.Complex128:
truth = val.Complex() != 0
case reflect.Chan, reflect.Func, reflect.Ptr, reflect.Interface:
truth = !val.IsNil()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
truth = val.Int() != 0
case reflect.Float32, reflect.Float64:
truth = val.Float() != 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
truth = val.Uint() != 0
case reflect.Struct:
truth = true // Struct values are always true.
default:
return
}
return truth, true
}
func assertValid(vObj reflect.Value) error {
if !vObj.IsValid() {
return nil
}
if obj, ok := vObj.Interface().(interface {
AssertValid() error
}); ok && !(vObj.Kind() == reflect.Ptr && vObj.IsNil()) {
if err := obj.AssertValid(); err != nil {
return err
}
}
switch vObj.Kind() {
case reflect.Ptr:
return assertValid(vObj.Elem())
case reflect.Struct:
return assertStructValid(vObj)
case reflect.Slice:
for i := 0; i < vObj.Len(); i++ {
if err := assertValid(vObj.Index(i)); err != nil {
return err
}
}
}
return nil
}
// NotNilFilter returns true for field values that are not nil;
// it returns false otherwise.
func NotNilFilter(_ string, value reflect.Value) bool {
//v, ok := value.(interface {
// IsNil() bool
//})
//return !ok || !v.IsNil()
return value.IsNil()
}
func interfaceEncoder(e *encodeState, v reflect.Value, quoted bool) {
if v.IsNil() {
e.WriteString("null")
return
}
e.reflectValue(v.Elem())
}
func (f encFnInfo) kInterface(rv reflect.Value) {
if rv.IsNil() {
f.ee.EncodeNil()
return
}
f.e.encodeValue(rv.Elem(), encFn{})
}
func (e *Encoder) preEncodeValue(rv reflect.Value) (rv2 reflect.Value, proceed bool) {
LOOP:
for {
switch rv.Kind() {
case reflect.Ptr, reflect.Interface:
if rv.IsNil() {
e.e.EncodeNil()
return
}
rv = rv.Elem()
continue LOOP
case reflect.Slice, reflect.Map:
if rv.IsNil() {
e.e.EncodeNil()
return
}
case reflect.Invalid, reflect.Func:
e.e.EncodeNil()
return
}
break
}
return rv, true
}
func (q *queryParser) parseList(v url.Values, value reflect.Value, prefix string, tag reflect.StructTag) error {
// If it's empty, generate an empty value
if !value.IsNil() && value.Len() == 0 {
v.Set(prefix, "")
return nil
}
// check for unflattened list member
if !q.isEC2 && tag.Get("flattened") == "" {
prefix += ".member"
}
for i := 0; i < value.Len(); i++ {
slicePrefix := prefix
if slicePrefix == "" {
slicePrefix = strconv.Itoa(i + 1)
} else {
slicePrefix = slicePrefix + "." + strconv.Itoa(i+1)
}
if err := q.parseValue(v, value.Index(i), slicePrefix, ""); err != nil {
return err
}
}
return nil
}
func (d *decoder) parse_unmarshaler(v reflect.Value) bool {
m, ok := v.Interface().(Unmarshaler)
if !ok {
// T doesn't work, try *T
if v.Kind() != reflect.Ptr && v.CanAddr() {
m, ok = v.Addr().Interface().(Unmarshaler)
if ok {
v = v.Addr()
}
}
}
if ok && (v.Kind() != reflect.Ptr || !v.IsNil()) {
if d.read_one_value() {
err := m.UnmarshalBencode(d.buf.Bytes())
d.buf.Reset()
if err != nil {
panic(&UnmarshalerError{v.Type(), err})
}
return true
}
d.buf.Reset()
}
return false
}
func (p *Decoder) unmarshalDictionary(pval *plistValue, val reflect.Value) {
typ := val.Type()
switch val.Kind() {
case reflect.Struct:
tinfo, err := getTypeInfo(typ)
if err != nil {
panic(err)
}
subvalues := pval.value.(*dictionary).m
for _, finfo := range tinfo.fields {
p.unmarshal(subvalues[finfo.name], finfo.value(val))
}
case reflect.Map:
if val.IsNil() {
val.Set(reflect.MakeMap(typ))
}
subvalues := pval.value.(*dictionary).m
for k, sval := range subvalues {
keyv := reflect.ValueOf(k).Convert(typ.Key())
mapElem := val.MapIndex(keyv)
if !mapElem.IsValid() {
mapElem = reflect.New(typ.Elem()).Elem()
}
p.unmarshal(sval, mapElem)
val.SetMapIndex(keyv, mapElem)
}
default:
panic(&incompatibleDecodeTypeError{typ, pval.kind})
}
}
func (m *mapper) unpackValue(keys []string, values []interface{}, out reflect.Value) error {
switch out.Kind() {
case reflect.Ptr:
if out.IsNil() {
out.Set(reflect.New(out.Type().Elem()))
}
return m.unpackValue(keys, values, reflect.Indirect(out))
case reflect.Slice:
if keys == nil {
return m.unpackSimple(nil, values, out)
} else {
return m.unpackSlice(keys, values, out)
}
case reflect.Struct:
return m.unpackStruct(keys, values, out)
case reflect.Map:
if keys == nil {
return m.unpackSimple(nil, values, out)
} else {
return m.unpackMap(keys, values, out)
}
default:
return m.unpackSimple(nil, values, out)
}
return fmt.Errorf("cannot unpack result to %T (%s)", out, out.Kind())
}
// All protocol buffer fields are nillable, but be careful.
func isNil(v reflect.Value) bool {
switch v.Kind() {
case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return v.IsNil()
}
return false
}
func (pe *pointerEncoder) encode(b []byte, v reflect.Value) []byte {
if v.IsNil() {
return append(b, 0x10)
} else {
return pe.encodeElem(b, v.Elem())
}
}
func decodeMap(d *decodeState, kind int, v reflect.Value) {
t := v.Type()
if t.Key().Kind() != reflect.String || kind != kindDocument {
d.saveErrorAndSkip(kind, t)
return
}
if v.IsNil() {
v.Set(reflect.MakeMap(t))
}
subv := reflect.New(t.Elem()).Elem()
offset := d.beginDoc()
for {
kind, name := d.scanKindName()
if kind == 0 {
break
}
if kind == kindNull {
continue
}
subv.Set(reflect.Zero(t.Elem()))
d.decodeValue(kind, subv)
v.SetMapIndex(reflect.ValueOf(string(name)), subv)
}
d.endDoc(offset)
}
func decodeSliceValue(d *Decoder, v reflect.Value) error {
n, err := d.DecodeArrayLen()
if err != nil {
return err
}
if n == -1 {
v.Set(reflect.Zero(v.Type()))
return nil
}
if n == 0 && v.IsNil() {
v.Set(reflect.MakeSlice(v.Type(), 0, 0))
return nil
}
if v.Cap() >= n {
v.Set(v.Slice(0, n))
} else if v.Len() < v.Cap() {
v.Set(v.Slice(0, v.Cap()))
}
for i := 0; i < n; i++ {
if i >= v.Len() {
v.Set(growSliceValue(v, n))
}
sv := v.Index(i)
if err := d.DecodeValue(sv); err != nil {
return err
}
}
return nil
}
// Validates that if a value is provided for a field, that value must be at
// least a minimum length.
func validateFieldMin(f reflect.StructField, fvalue reflect.Value) error {
minStr := f.Tag.Get("min")
if minStr == "" {
return nil
}
min, _ := strconv.ParseInt(minStr, 10, 64)
kind := fvalue.Kind()
if kind == reflect.Ptr {
if fvalue.IsNil() {
return nil
}
fvalue = fvalue.Elem()
}
switch fvalue.Kind() {
case reflect.String:
if int64(fvalue.Len()) < min {
return fmt.Errorf("field too short, minimum length %d", min)
}
case reflect.Slice, reflect.Map:
if fvalue.IsNil() {
return nil
}
if int64(fvalue.Len()) < min {
return fmt.Errorf("field too short, minimum length %d", min)
}
// TODO min can also apply to number minimum value.
}
return nil
}
// NotNilFilter returns true for field values that are not nil;
// it returns false otherwise.
func NotNilFilter(_ string, v reflect.Value) bool {
switch v.Kind() {
case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return !v.IsNil()
}
return true
}
func isZero(v reflect.Value) bool {
switch v.Kind() {
case reflect.String:
return len(v.String()) == 0
case reflect.Interface, reflect.Ptr:
return v.IsNil()
case reflect.Slice:
return v.Len() == 0
case reflect.Map:
return v.Len() == 0
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return v.Uint() == 0
case reflect.Bool:
return !v.Bool()
case reflect.Struct:
vt := v.Type()
for i := v.NumField() - 1; i >= 0; i-- {
if vt.Field(i).PkgPath != "" {
continue // Private field
}
if !isZero(v.Field(i)) {
return false
}
}
return true
}
return false
}
func display(name string, v reflect.Value) {
switch v.Kind() { //uint
case reflect.Invalid:
fmt.Printf("%s = invalid\n", name)
case reflect.Slice, reflect.Array:
for i := 0; i < v.Len(); i++ {
display(fmt.Sprintf("%s[%d]", name, i), v.Index(i))
}
case reflect.Struct:
for i := 0; i < v.NumField(); i++ {
fieldPath := fmt.Sprintf("%s.%s", name, v.Type().Field(i).Name)
display(fieldPath, v.Field(i))
}
case reflect.Map:
for _, key := range v.MapKeys() {
display(fmt.Sprintf("%s[%s]", name,
formatAtom(key)), v.MapIndex(key))
}
case reflect.Ptr:
if v.IsNil() {
fmt.Printf("%s = nil\n", name)
} else {
display(fmt.Sprintf("(*%s)", name), v.Elem())
}
case reflect.Interface:
if v.IsNil() {
fmt.Printf("%s = nil\n", name)
} else {
fmt.Printf("%s.type = %s\n", name, v.Elem().Type())
display(name+".value", v.Elem())
}
default: // basic types, channels, funcs
fmt.Printf("%s = %s\n", name, formatAtom(v))
}
}
