func decodeSlice(d *decodeState, kind int, v reflect.Value) {
if kind != kindArray {
d.saveErrorAndSkip(kind, v.Type())
return
}
t := v.Type()
offset := d.beginDoc()
i := 0
for {
kind, _ := d.scanKindName()
if kind == 0 {
break
}
if i >= v.Cap() {
newcap := v.Cap() + v.Cap()/2
if newcap < 4 {
newcap = 4
}
newv := reflect.MakeSlice(t, v.Len(), newcap)
reflect.Copy(newv, v)
v.Set(newv)
}
if i >= v.Len() {
v.SetLen(i + 1)
}
d.decodeValue(kind, v.Index(i))
i += 1
}
d.endDoc(offset)
}
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 setRepeated(field reflect.Value, vslice []Value, setElem setFunc) error {
vlen := len(vslice)
var flen int
switch field.Type().Kind() {
case reflect.Slice:
// Make a slice of the right size, avoiding allocation if possible.
switch {
case field.Len() < vlen:
field.Set(reflect.MakeSlice(field.Type(), vlen, vlen))
case field.Len() > vlen:
field.SetLen(vlen)
}
flen = vlen
case reflect.Array:
flen = field.Len()
if flen > vlen {
// Set extra elements to their zero value.
z := reflect.Zero(field.Type().Elem())
for i := vlen; i < flen; i++ {
field.Index(i).Set(z)
}
}
default:
return fmt.Errorf("bigquery: impossible field type %s", field.Type())
}
for i, val := range vslice {
if i < flen { // avoid writing past the end of a short array
if err := setElem(field.Index(i), val); err != nil {
return err
}
}
}
return nil
}
func (d *Decoder) decodeList(avList []*dynamodb.AttributeValue, v reflect.Value) error {
switch v.Kind() {
case reflect.Slice:
// Make room for the slice elements if needed
if v.IsNil() || v.Cap() < len(avList) {
// What about if ignoring nil/empty values?
v.Set(reflect.MakeSlice(v.Type(), 0, len(avList)))
}
case reflect.Array:
// Limited to capacity of existing array.
case reflect.Interface:
s := make([]interface{}, len(avList))
for i, av := range avList {
if err := d.decode(av, reflect.ValueOf(&s[i]).Elem(), tag{}); err != nil {
return err
}
}
v.Set(reflect.ValueOf(s))
return nil
default:
return &UnmarshalTypeError{Value: "list", Type: v.Type()}
}
// If v is not a slice, array
for i := 0; i < v.Cap() && i < len(avList); i++ {
v.SetLen(i + 1)
if err := d.decode(avList[i], v.Index(i), tag{}); err != nil {
return err
}
}
return nil
}
func (d *Decoder) decodeBinary(b []byte, v reflect.Value) error {
if v.Kind() == reflect.Interface {
buf := make([]byte, len(b))
copy(buf, b)
v.Set(reflect.ValueOf(buf))
return nil
}
switch v.Interface().(type) {
case []byte:
if v.IsNil() || v.Cap() < len(b) {
v.Set(reflect.MakeSlice(byteSliceType, len(b), len(b)))
} else if v.Len() != len(b) {
v.SetLen(len(b))
}
copy(v.Interface().([]byte), b)
default:
if v.Kind() == reflect.Array && v.Type().Elem().Kind() == reflect.Uint8 {
reflect.Copy(v, reflect.ValueOf(b))
break
}
return &UnmarshalTypeError{Value: "binary", Type: v.Type()}
}
return nil
}
func (d *Decoder) decodeStringSet(ss []*string, v reflect.Value) error {
switch v.Kind() {
case reflect.Slice:
// Make room for the slice elements if needed
if v.IsNil() || v.Cap() < len(ss) {
v.Set(reflect.MakeSlice(v.Type(), 0, len(ss)))
}
case reflect.Array:
// Limited to capacity of existing array.
case reflect.Interface:
set := make([]string, len(ss))
for i, s := range ss {
if err := d.decodeString(s, reflect.ValueOf(&set[i]).Elem(), tag{}); err != nil {
return err
}
}
v.Set(reflect.ValueOf(set))
return nil
default:
return &UnmarshalTypeError{Value: "string set", Type: v.Type()}
}
for i := 0; i < v.Cap() && i < len(ss); i++ {
v.SetLen(i + 1)
u, elem := indirect(v.Index(i), false)
if u != nil {
return u.UnmarshalDynamoDBAttributeValue(&dynamodb.AttributeValue{SS: ss})
}
if err := d.decodeString(ss[i], elem, tag{}); err != nil {
return err
}
}
return nil
}
// parse a value as the appropriate type and store it in the struct
func setSlice(dest reflect.Value, values []string) error {
if !dest.CanSet() {
return fmt.Errorf("field is not writable")
}
var ptr bool
elem := dest.Type().Elem()
if elem.Kind() == reflect.Ptr {
ptr = true
elem = elem.Elem()
}
// Truncate the dest slice in case default values exist
if !dest.IsNil() {
dest.SetLen(0)
}
for _, s := range values {
v := reflect.New(elem)
if err := setScalar(v.Elem(), s); err != nil {
return err
}
if !ptr {
v = v.Elem()
}
dest.Set(reflect.Append(dest, v))
}
return nil
}
func ensureLen(d reflect.Value, n int) {
if n > d.Cap() {
d.Set(reflect.MakeSlice(d.Type(), n, n))
} else {
d.SetLen(n)
}
}
func (p *Decoder) unmarshalArray(pval *plistValue, val reflect.Value) {
subvalues := pval.value.([]*plistValue)
var n int
if val.Kind() == reflect.Slice {
// Slice of element values.
// Grow slice.
cnt := len(subvalues) + val.Len()
if cnt >= val.Cap() {
ncap := 2 * cnt
if ncap < 4 {
ncap = 4
}
new := reflect.MakeSlice(val.Type(), val.Len(), ncap)
reflect.Copy(new, val)
val.Set(new)
}
n = val.Len()
val.SetLen(cnt)
} else if val.Kind() == reflect.Array {
if len(subvalues) > val.Cap() {
panic(fmt.Errorf("plist: attempted to unmarshal %d values into an array of size %d", len(subvalues), val.Cap()))
}
} else {
panic(&incompatibleDecodeTypeError{val.Type(), pval.kind})
}
// Recur to read element into slice.
for _, sval := range subvalues {
p.unmarshal(sval, val.Index(n))
n++
}
return
}
func decodeSliceElems(s *Stream, val reflect.Value, elemdec decoder) error {
i := 0
for ; ; i++ {
// grow slice if necessary
if i >= val.Cap() {
newcap := val.Cap() + val.Cap()/2
if newcap < 4 {
newcap = 4
}
newv := reflect.MakeSlice(val.Type(), val.Len(), newcap)
reflect.Copy(newv, val)
val.Set(newv)
}
if i >= val.Len() {
val.SetLen(i + 1)
}
// decode into element
if err := elemdec(s, val.Index(i)); err == EOL {
break
} else if err != nil {
return addErrorContext(err, fmt.Sprint("[", i, "]"))
}
}
if i < val.Len() {
val.SetLen(i)
}
return nil
}
func (d *Decoder) decodeSlice(valueField reflect.Value, key string) error {
//fmt.Printf("[D] Decode slice tagged as: ->%s<-\n", key)
var errors []string
seenIndexes := make(map[string]bool)
for k := range d.vmx {
if !strings.HasPrefix(k, key) {
continue
}
index := getVMXAttrIndex(k, key)
if index == "" || seenIndexes[index] {
continue
}
// The reason we have to keep track of seen indexes is because entries
// in the vmx file with the same prefix are actually objects, they are
// decoded into Go structs, meaning that they only need one pass to be decoded.
seenIndexes[index] = true
length := valueField.Len()
capacity := valueField.Cap()
// Grow the slice if needed. This allows us to pass a value
// reference to d.decode() so it populates the value addressed by the slice.
if length >= capacity {
capacity := 2 * length
if capacity < 4 {
capacity = 4
}
newSlice := reflect.MakeSlice(valueField.Type(), length, capacity)
reflect.Copy(newSlice, valueField)
valueField.Set(newSlice)
}
valueField.SetLen(length + 1)
newKey := key
if key != index {
newKey = key + index
}
err := d.decode(valueField.Index(length), newKey)
if err != nil {
errors = appendErrors(errors, err)
valueField.SetLen(length)
}
}
if len(errors) > 0 {
return &Error{errors}
}
return nil
}
func (d *Decoder) decodeList(v reflect.Value) error {
//if we have an interface, just put a []interface{} in it!
if v.Kind() == reflect.Interface {
var x []interface{}
defer func(p reflect.Value) { p.Set(v) }(v)
v = reflect.ValueOf(&x).Elem()
}
if v.Kind() != reflect.Array && v.Kind() != reflect.Slice {
return fmt.Errorf("Cant store a []interface{} into %s", v.Type())
}
//read out the l that prefixes the list
ch, err := d.readByte()
if err != nil {
return err
}
if ch != 'l' {
panic("got something other than a list head after a peek")
}
for i := 0; ; i++ {
//peek for the end token and read it out
ch, err := d.peekByte()
if err != nil {
return err
}
switch ch {
case 'e':
_, err := d.readByte() //consume the end
return err
}
//grow it if required
if i >= v.Cap() && v.IsValid() {
newcap := v.Cap() + v.Cap()/2
if newcap < 4 {
newcap = 4
}
newv := reflect.MakeSlice(v.Type(), v.Len(), newcap)
reflect.Copy(newv, v)
v.Set(newv)
}
//reslice into cap (its a slice now since it had to have grown)
if i >= v.Len() && v.IsValid() {
v.SetLen(i + 1)
}
//decode a value into the index
if err := d.decodeInto(v.Index(i)); err != nil {
return err
}
}
panic("unreachable")
}
//FIXME: fix when v is invalid
// type(1) | name length(1) | item size(4) | raw name bytes | 0x00
// | element number(4) | element1 | ... | elementN
func (d *decodeState) array(v reflect.Value) {
d.off += 1 // type
klen := int(Int8(d.data[d.off:]))
d.off += 1 // name length
// vlen := int(Int32(d.data[d.off:]))
d.off += 4 // content length
//var key string
if klen > 0 {
key := d.data[d.off : d.off+klen-1]
d.off += klen
v = fieldByTag(v, key)
u, pv := d.indirect(v, false)
if u != nil {
d.off -= 1 + 1 + 4 + klen
if err := u.UnmarshalMCPACK(d.next()); err != nil {
d.error(err)
}
return
}
v = pv
}
n := int(Int32(d.data[d.off:]))
d.off += 4 // member number
if v.Kind() == reflect.Slice {
if n > v.Cap() {
newv := reflect.MakeSlice(v.Type(), n, n)
v.Set(newv)
}
v.SetLen(n)
}
for i := 0; i < n; i++ {
if i < v.Len() {
d.value(v.Index(i))
} else {
d.value(reflect.Value{})
}
}
if n < v.Len() {
if v.Kind() == reflect.Array {
z := reflect.Zero(v.Type().Elem())
for i := 0; i < v.Len(); i++ {
v.Index(i).Set(z)
}
}
}
if n == 0 && v.Kind() == reflect.Slice {
v.Set(reflect.MakeSlice(v.Type(), 0, 0))
}
}
func fixSliceLen(slice reflect.Value, lenslice int) reflect.Value {
if slice.Len() != lenslice {
if slice.Cap() >= lenslice {
slice.SetLen(lenslice)
} else {
slice.Set(reflect.MakeSlice(slice.Type(), lenslice, lenslice))
}
}
return slice
}
// unmarshalAttr unmarshals a single XML attribute into val.
func (p *Decoder) unmarshalAttr(val reflect.Value, attr Attr) error {
if val.Kind() == reflect.Ptr {
if val.IsNil() {
val.Set(reflect.New(val.Type().Elem()))
}
val = val.Elem()
}
if val.CanInterface() && val.Type().Implements(unmarshalerAttrType) {
// This is an unmarshaler with a non-pointer receiver,
// so it's likely to be incorrect, but we do what we're told.
return val.Interface().(UnmarshalerAttr).UnmarshalXMLAttr(attr)
}
if val.CanAddr() {
pv := val.Addr()
if pv.CanInterface() && pv.Type().Implements(unmarshalerAttrType) {
return pv.Interface().(UnmarshalerAttr).UnmarshalXMLAttr(attr)
}
}
// Not an UnmarshalerAttr; try encoding.TextUnmarshaler.
if val.CanInterface() && val.Type().Implements(textUnmarshalerType) {
// This is an unmarshaler with a non-pointer receiver,
// so it's likely to be incorrect, but we do what we're told.
return val.Interface().(encoding.TextUnmarshaler).UnmarshalText([]byte(attr.Value))
}
if val.CanAddr() {
pv := val.Addr()
if pv.CanInterface() && pv.Type().Implements(textUnmarshalerType) {
return pv.Interface().(encoding.TextUnmarshaler).UnmarshalText([]byte(attr.Value))
}
}
if val.Type().Kind() == reflect.Slice && val.Type().Elem().Kind() != reflect.Uint8 {
// Slice of element values.
// Grow slice.
n := val.Len()
val.Set(reflect.Append(val, reflect.Zero(val.Type().Elem())))
// Recur to read element into slice.
if err := p.unmarshalAttr(val.Index(n), attr); err != nil {
val.SetLen(n)
return err
}
return nil
}
if val.Type() == attrType {
val.Set(reflect.ValueOf(attr))
return nil
}
return copyValue(val, []byte(attr.Value))
}
func (md *MetaData) unifySlice(data interface{}, rv reflect.Value) error {
datav := reflect.ValueOf(data)
if datav.Kind() != reflect.Slice {
return badtype("slice", data)
}
sliceLen := datav.Len()
if rv.IsNil() || rv.Len() < datav.Len() {
rv.Set(reflect.MakeSlice(rv.Type(), sliceLen, sliceLen))
}
rv.SetLen(datav.Len())
return md.unifySliceArray(datav, rv)
}
func setSlice(value reflect.Value, args []string) (n int, err error) {
value.SetLen(0)
slice := value
for _, i := range args {
x := reflect.New(value.Type().Elem())
if err = setValue(x.Elem(), i); err != nil {
return
}
slice = reflect.Append(slice, x.Elem())
n++
}
value.Set(slice)
return
}
func (md *MetaData) unifySlice(data interface{}, rv reflect.Value) error {
datav := reflect.ValueOf(data)
if datav.Kind() != reflect.Slice {
if !datav.IsValid() {
return nil
}
return badtype("slice", data)
}
n := datav.Len()
if rv.IsNil() || rv.Cap() < n {
rv.Set(reflect.MakeSlice(rv.Type(), n, n))
}
rv.SetLen(n)
return md.unifySliceArray(datav, rv)
}
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
}
}
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)
}
rtelem := f.ti.rt.Elem()
for rtelem.Kind() == reflect.Ptr {
rtelem = rtelem.Elem()
}
fn := f.d.getDecFn(rtelem)
for j := 0; j < containerLenS; j++ {
f.d.decodeValue(rv.Index(j), fn)
}
}
func decodeByteSlice(d *decodeState, kind int, v reflect.Value) {
var p []byte
switch kind {
default:
d.saveErrorAndSkip(kind, v.Type())
return
case kindBinary:
p, _ = d.scanBinary()
}
if v.IsNil() || v.Cap() < len(p) {
v.Set(reflect.MakeSlice(v.Type(), len(p), len(p)))
} else {
v.SetLen(len(p))
}
reflect.Copy(v, reflect.ValueOf(p))
}
func (d *Decoder) decodeNumberSet(ns []*string, v reflect.Value) error {
switch v.Kind() {
case reflect.Slice:
// Make room for the slice elements if needed
if v.IsNil() || v.Cap() < len(ns) {
// What about if ignoring nil/empty values?
v.Set(reflect.MakeSlice(v.Type(), 0, len(ns)))
}
case reflect.Array:
// Limited to capacity of existing array.
case reflect.Interface:
if d.UseNumber {
set := make([]Number, len(ns))
for i, n := range ns {
if err := d.decodeNumber(n, reflect.ValueOf(&set[i]).Elem()); err != nil {
return err
}
}
v.Set(reflect.ValueOf(set))
} else {
set := make([]float64, len(ns))
for i, n := range ns {
if err := d.decodeNumber(n, reflect.ValueOf(&set[i]).Elem()); err != nil {
return err
}
}
v.Set(reflect.ValueOf(set))
}
return nil
default:
return &UnmarshalTypeError{Value: "number set", Type: v.Type()}
}
for i := 0; i < v.Cap() && i < len(ns); i++ {
v.SetLen(i + 1)
u, elem := indirect(v.Index(i), false)
if u != nil {
return u.UnmarshalDynamoDBAttributeValue(&dynamodb.AttributeValue{NS: ns})
}
if err := d.decodeNumber(ns[i], elem); err != nil {
return err
}
}
return nil
}
func (c *Config) configureArray(v, config reflect.Value, path string) error {
vkind := v.Kind()
// nil interface
if vkind == reflect.Interface && v.NumMethod() == 0 {
v.Set(config)
return nil
}
if vkind != reflect.Array && vkind != reflect.Slice {
return &ConfigValueError{path, fmt.Sprintf("%v cannot be used to configure %v", config.Type(), v.Type())}
}
n := config.Len()
// grow slice if it's smaller than the config array
if vkind == reflect.Slice && v.Cap() < n {
t := reflect.MakeSlice(v.Type(), n, n)
reflect.Copy(t, v)
v.Set(t)
}
if n > v.Cap() {
n = v.Cap()
}
for i := 0; i < n; i++ {
if err := c.configure(v.Index(i), config.Index(i), path+"."+strconv.Itoa(i)); err != nil {
return err
}
}
if n < v.Len() {
if vkind == reflect.Array {
// Array. Zero the rest.
z := reflect.Zero(v.Type().Elem())
for i := n; i < v.Len(); i++ {
v.Index(i).Set(z)
}
} else {
v.SetLen(n)
}
}
return nil
}
func (d *decoder) parse_list(v reflect.Value) {
switch v.Kind() {
case reflect.Array, reflect.Slice:
default:
panic(&UnmarshalTypeError{
Value: "array",
Type: v.Type(),
})
}
i := 0
for {
if v.Kind() == reflect.Slice && i >= v.Len() {
v.Set(reflect.Append(v, reflect.Zero(v.Type().Elem())))
}
ok := false
if i < v.Len() {
ok = d.parse_value(v.Index(i))
} else {
_, ok = d.parse_value_interface()
}
if !ok {
break
}
i++
}
if i < v.Len() {
if v.Kind() == reflect.Array {
z := reflect.Zero(v.Type().Elem())
for n := v.Len(); i < n; i++ {
v.Index(i).Set(z)
}
} else {
v.SetLen(i)
}
}
if i == 0 && v.Kind() == reflect.Slice {
v.Set(reflect.MakeSlice(v.Type(), 0, 0))
}
}
func (d *Decoder) decodeBinary(b []byte, v reflect.Value) error {
if v.Kind() == reflect.Interface {
buf := make([]byte, len(b))
copy(buf, b)
v.Set(reflect.ValueOf(buf))
return nil
}
if v.Kind() != reflect.Slice {
return &UnmarshalTypeError{Value: "binary", Type: v.Type()}
}
if v.Type() == byteSliceType {
// Optimization for []byte types
if v.IsNil() || v.Cap() < len(b) {
v.Set(reflect.MakeSlice(byteSliceType, len(b), len(b)))
} else if v.Len() != len(b) {
v.SetLen(len(b))
}
copy(v.Interface().([]byte), b)
return nil
}
switch v.Type().Elem().Kind() {
case reflect.Uint8:
// Fallback to reflection copy for type aliased of []byte type
if v.IsNil() || v.Cap() < len(b) {
v.Set(reflect.MakeSlice(v.Type(), len(b), len(b)))
} else if v.Len() != len(b) {
v.SetLen(len(b))
}
for i := 0; i < len(b); i++ {
v.Index(i).SetUint(uint64(b[i]))
}
default:
if v.Kind() == reflect.Array && v.Type().Elem().Kind() == reflect.Uint8 {
reflect.Copy(v, reflect.ValueOf(b))
break
}
return &UnmarshalTypeError{Value: "binary", Type: v.Type()}
}
return nil
}
// decodeArray treats the next bytes as a variable length series of XDR encoded
// elements of the same type as the array represented by the reflection value.
// The number of elements is obtained by first decoding the unsigned integer
// element count. Then each element is decoded into the passed array. The
// ignoreOpaque flag controls whether or not uint8 (byte) elements should be
// decoded individually or as a variable sequence of opaque data. It returns
// the number of bytes actually read.
//
// An UnmarshalError is returned if any issues are encountered while decoding
// the array elements.
//
// Reference:
// RFC Section 4.13 - Variable-Length Array
// Unsigned integer length followed by individually XDR encoded array
// elements
func (d *Decoder) decodeArray(v reflect.Value, ignoreOpaque bool) (int, error) {
dataLen, n, err := d.DecodeUint()
if err != nil {
return n, err
}
if uint(dataLen) > uint(math.MaxInt32) ||
(d.maxReadSize != 0 && uint(dataLen) > d.maxReadSize) {
err := unmarshalError("decodeArray", ErrOverflow, errMaxSlice,
dataLen, nil)
return n, err
}
// Allocate storage for the slice elements (the underlying array) if
// existing slice does not have enough capacity.
sliceLen := int(dataLen)
if v.Cap() < sliceLen {
v.Set(reflect.MakeSlice(v.Type(), sliceLen, sliceLen))
}
if v.Len() < sliceLen {
v.SetLen(sliceLen)
}
// Treat []byte (byte is alias for uint8) as opaque data unless ignored.
if !ignoreOpaque && v.Type().Elem().Kind() == reflect.Uint8 {
data, n2, err := d.DecodeFixedOpaque(int32(sliceLen))
n += n2
if err != nil {
return n, err
}
v.SetBytes(data)
return n, nil
}
// Decode each slice element.
for i := 0; i < sliceLen; i++ {
n2, err := d.decode(v.Index(i))
n += n2
if err != nil {
return n, err
}
}
return n, nil
}
func unmarshalArray(data string, v reflect.Value, kind reflect.Kind) error {
i := 0
vtype := v.Type()
l := v.Cap()
if v.Len() < l {
v.SetLen(l)
}
for len(data) > 0 {
if i >= l {
if kind == reflect.Array {
break
}
newl := l + l/2
if newl < 4 {
newl = 4
}
newv := reflect.MakeSlice(vtype, newl, newl)
reflect.Copy(newv, v)
v.Set(newv)
l = newl
}
el := v.Index(i)
i++
n, err := unmarshal(data, el)
data = data[n:]
if err != nil {
return err
}
}
if i < l {
if kind == reflect.Array {
// zero out the rest
z := reflect.Zero(vtype.Elem())
for ; i < l; i++ {
v.Index(i).Set(z)
}
} else {
v.SetLen(i)
}
}
return nil
}
func (d *arrayDecoder) decode(dv, sv reflect.Value) {
// Iterate through the slice/array and decode each element before adding it
// to the dest slice/array
i := 0
for i < sv.Len() {
if dv.Kind() == reflect.Slice {
// Get element of array, growing if necessary.
if i >= dv.Cap() {
newcap := dv.Cap() + dv.Cap()/2
if newcap < 4 {
newcap = 4
}
newdv := reflect.MakeSlice(dv.Type(), dv.Len(), newcap)
reflect.Copy(newdv, dv)
dv.Set(newdv)
}
if i >= dv.Len() {
dv.SetLen(i + 1)
}
}
if i < dv.Len() {
// Decode into element.
d.elemDec(dv.Index(i), sv.Index(i))
}
i++
}
// Ensure that the destination is the correct size
if i < dv.Len() {
if dv.Kind() == reflect.Array {
// Array. Zero the rest.
z := reflect.Zero(dv.Type().Elem())
for ; i < dv.Len(); i++ {
dv.Index(i).Set(z)
}
} else {
dv.SetLen(i)
}
}
}
func (f *decFnInfo) kSlice(rv reflect.Value) {
// Be more careful calling Set() here, because a reflect.Value from an array
// may have come in here (which may not be settable).
// In places where the slice got from an array could be, we should guard with CanSet() calls.
if f.rtid == byteSliceTypId { // rawbytes
if bs2, changed2 := f.dd.decodeBytes(rv.Bytes()); changed2 {
rv.SetBytes(bs2)
}
return
}
containerLen := f.dd.readArrayLen()
if rv.IsNil() {
rv.Set(reflect.MakeSlice(f.rt, containerLen, containerLen))
}
if containerLen == 0 {
return
}
// if we need to reset rv but it cannot be set, we should err out.
// for example, if slice is got from unaddressable array, CanSet = false
if rvcap, rvlen := rv.Len(), rv.Cap(); containerLen > rvcap {
if rv.CanSet() {
rvn := reflect.MakeSlice(f.rt, containerLen, containerLen)
if rvlen > 0 {
reflect.Copy(rvn, rv)
}
rv.Set(rvn)
} else {
decErr("Cannot reset slice with less cap: %v than stream contents: %v", rvcap, containerLen)
}
} else if containerLen > rvlen {
rv.SetLen(containerLen)
}
for j := 0; j < containerLen; j++ {
f.d.decodeValue(rv.Index(j))
}
}
// setElement ses the element value of a map, array, or slice at the specified index.
func setElement(data reflect.Value, p string, v interface{}) error {
value := reflect.ValueOf(v)
switch data.Kind() {
case reflect.Map:
key := reflect.ValueOf(p)
data.SetMapIndex(key, value)
case reflect.Slice, reflect.Array:
idx, err := strconv.Atoi(p)
if err != nil || idx < 0 {
return fmt.Errorf("%v is not a valid array or slice index", p)
}
if data.Kind() == reflect.Slice {
if idx >= data.Cap() {
return fmt.Errorf("%v is out of the slice index bound", p)
}
data.SetLen(idx + 1)
} else if idx >= data.Cap() {
return fmt.Errorf("%v is out of the array index bound", p)
}
data.Index(idx).Set(value)
}
return nil
}
func (par *sliceParser) ParseValue(ctx *parseContext, valueOf reflect.Value, location int, err *Error) int {
var v reflect.Value
valueOf.SetLen(0)
tp := valueOf.Type().Elem()
for {
v = reflect.New(tp).Elem()
var nl int
nl = ctx.parse(v, par.Parser, location, err)
if nl < 0 {
if valueOf.Len() >= par.Min {
return location
}
return nl
}
if nl <= location {
panic("Invalid grammar: 0-length member of ZeroOrMore")
}
location = nl
valueOf.Set(reflect.Append(valueOf, v))
if len(par.Delimiter) > 0 {
nl = ctx.skipWS(location)
if strAt(ctx.str, nl, par.Delimiter) {
location = ctx.skipWS(nl + len(par.Delimiter))
} else {
// Here we've got at least one parsed member, so it could not be an error.
return nl
}
}
}
}
