mirror of
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rebase: update K8s packages to v0.32.1
Update K8s packages in go.mod to v0.32.1 Signed-off-by: Praveen M <m.praveen@ibm.com>
This commit is contained in:
Praveen M
mergify[bot]
292
vendor/github.com/godbus/dbus/v5/decoder.go
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vendored
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292
vendor/github.com/godbus/dbus/v5/decoder.go
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@ -0,0 +1,292 @@
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package dbus
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import (
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"encoding/binary"
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"io"
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"reflect"
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)
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type decoder struct {
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in io.Reader
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order binary.ByteOrder
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pos int
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fds []int
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}
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// newDecoder returns a new decoder that reads values from in. The input is
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// expected to be in the given byte order.
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func newDecoder(in io.Reader, order binary.ByteOrder, fds []int) *decoder {
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dec := new(decoder)
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dec.in = in
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dec.order = order
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dec.fds = fds
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return dec
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}
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// align aligns the input to the given boundary and panics on error.
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func (dec *decoder) align(n int) {
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if dec.pos%n != 0 {
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newpos := (dec.pos + n - 1) & ^(n - 1)
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empty := make([]byte, newpos-dec.pos)
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if _, err := io.ReadFull(dec.in, empty); err != nil {
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panic(err)
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}
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dec.pos = newpos
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}
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}
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// Calls binary.Read(dec.in, dec.order, v) and panics on read errors.
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func (dec *decoder) binread(v interface{}) {
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if err := binary.Read(dec.in, dec.order, v); err != nil {
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panic(err)
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}
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}
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func (dec *decoder) Decode(sig Signature) (vs []interface{}, err error) {
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defer func() {
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var ok bool
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v := recover()
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if err, ok = v.(error); ok {
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if err == io.EOF || err == io.ErrUnexpectedEOF {
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err = FormatError("unexpected EOF")
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}
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}
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}()
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vs = make([]interface{}, 0)
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s := sig.str
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for s != "" {
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err, rem := validSingle(s, &depthCounter{})
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if err != nil {
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return nil, err
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}
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v := dec.decode(s[:len(s)-len(rem)], 0)
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vs = append(vs, v)
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s = rem
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}
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return vs, nil
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}
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func (dec *decoder) decode(s string, depth int) interface{} {
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dec.align(alignment(typeFor(s)))
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switch s[0] {
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case 'y':
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var b [1]byte
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if _, err := dec.in.Read(b[:]); err != nil {
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panic(err)
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}
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dec.pos++
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return b[0]
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case 'b':
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i := dec.decode("u", depth).(uint32)
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switch {
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case i == 0:
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return false
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case i == 1:
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return true
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default:
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panic(FormatError("invalid value for boolean"))
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}
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case 'n':
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var i int16
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dec.binread(&i)
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dec.pos += 2
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return i
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case 'i':
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var i int32
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dec.binread(&i)
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dec.pos += 4
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return i
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case 'x':
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var i int64
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dec.binread(&i)
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dec.pos += 8
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return i
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case 'q':
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var i uint16
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dec.binread(&i)
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dec.pos += 2
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return i
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case 'u':
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var i uint32
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dec.binread(&i)
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dec.pos += 4
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return i
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case 't':
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var i uint64
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dec.binread(&i)
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dec.pos += 8
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return i
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case 'd':
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var f float64
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dec.binread(&f)
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dec.pos += 8
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return f
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case 's':
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length := dec.decode("u", depth).(uint32)
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b := make([]byte, int(length)+1)
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if _, err := io.ReadFull(dec.in, b); err != nil {
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panic(err)
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}
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dec.pos += int(length) + 1
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return string(b[:len(b)-1])
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case 'o':
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return ObjectPath(dec.decode("s", depth).(string))
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case 'g':
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length := dec.decode("y", depth).(byte)
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b := make([]byte, int(length)+1)
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if _, err := io.ReadFull(dec.in, b); err != nil {
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panic(err)
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}
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dec.pos += int(length) + 1
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sig, err := ParseSignature(string(b[:len(b)-1]))
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if err != nil {
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panic(err)
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}
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return sig
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case 'v':
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if depth >= 64 {
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panic(FormatError("input exceeds container depth limit"))
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}
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var variant Variant
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sig := dec.decode("g", depth).(Signature)
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if len(sig.str) == 0 {
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panic(FormatError("variant signature is empty"))
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}
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err, rem := validSingle(sig.str, &depthCounter{})
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if err != nil {
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panic(err)
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}
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if rem != "" {
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panic(FormatError("variant signature has multiple types"))
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}
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variant.sig = sig
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variant.value = dec.decode(sig.str, depth+1)
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return variant
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case 'h':
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idx := dec.decode("u", depth).(uint32)
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if int(idx) < len(dec.fds) {
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return UnixFD(dec.fds[idx])
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}
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return UnixFDIndex(idx)
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case 'a':
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if len(s) > 1 && s[1] == '{' {
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ksig := s[2:3]
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vsig := s[3 : len(s)-1]
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v := reflect.MakeMap(reflect.MapOf(typeFor(ksig), typeFor(vsig)))
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if depth >= 63 {
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panic(FormatError("input exceeds container depth limit"))
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}
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length := dec.decode("u", depth).(uint32)
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// Even for empty maps, the correct padding must be included
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dec.align(8)
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spos := dec.pos
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for dec.pos < spos+int(length) {
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dec.align(8)
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if !isKeyType(v.Type().Key()) {
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panic(InvalidTypeError{v.Type()})
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}
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kv := dec.decode(ksig, depth+2)
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vv := dec.decode(vsig, depth+2)
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v.SetMapIndex(reflect.ValueOf(kv), reflect.ValueOf(vv))
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}
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return v.Interface()
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}
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if depth >= 64 {
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panic(FormatError("input exceeds container depth limit"))
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}
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sig := s[1:]
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length := dec.decode("u", depth).(uint32)
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// capacity can be determined only for fixed-size element types
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var capacity int
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if s := sigByteSize(sig); s != 0 {
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capacity = int(length) / s
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}
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v := reflect.MakeSlice(reflect.SliceOf(typeFor(sig)), 0, capacity)
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// Even for empty arrays, the correct padding must be included
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align := alignment(typeFor(s[1:]))
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if len(s) > 1 && s[1] == '(' {
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//Special case for arrays of structs
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//structs decode as a slice of interface{} values
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//but the dbus alignment does not match this
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align = 8
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}
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dec.align(align)
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spos := dec.pos
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for dec.pos < spos+int(length) {
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ev := dec.decode(s[1:], depth+1)
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v = reflect.Append(v, reflect.ValueOf(ev))
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}
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return v.Interface()
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case '(':
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if depth >= 64 {
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panic(FormatError("input exceeds container depth limit"))
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}
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dec.align(8)
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v := make([]interface{}, 0)
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s = s[1 : len(s)-1]
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for s != "" {
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err, rem := validSingle(s, &depthCounter{})
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if err != nil {
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panic(err)
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}
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ev := dec.decode(s[:len(s)-len(rem)], depth+1)
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v = append(v, ev)
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s = rem
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}
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return v
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default:
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panic(SignatureError{Sig: s})
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}
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}
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// sigByteSize tries to calculates size of the given signature in bytes.
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//
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// It returns zero when it can't, for example when it contains non-fixed size
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// types such as strings, maps and arrays that require reading of the transmitted
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// data, for that we would need to implement the unread method for Decoder first.
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func sigByteSize(sig string) int {
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var total int
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for offset := 0; offset < len(sig); {
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switch sig[offset] {
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case 'y':
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total += 1
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offset += 1
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case 'n', 'q':
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total += 2
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offset += 1
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case 'b', 'i', 'u', 'h':
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total += 4
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offset += 1
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case 'x', 't', 'd':
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total += 8
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offset += 1
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case '(':
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i := 1
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depth := 1
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for i < len(sig[offset:]) && depth != 0 {
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if sig[offset+i] == '(' {
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depth++
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} else if sig[offset+i] == ')' {
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depth--
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}
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i++
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}
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s := sigByteSize(sig[offset+1 : offset+i-1])
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if s == 0 {
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return 0
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}
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total += s
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offset += i
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default:
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return 0
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}
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}
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return total
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}
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// A FormatError is an error in the wire format.
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type FormatError string
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func (e FormatError) Error() string {
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return "dbus: wire format error: " + string(e)
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}
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