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Girish Gowdrad27a1902021-02-23 16:19:08 -08001// Go support for Protocol Buffers - Google's data interchange format
2//
3// Copyright 2016 The Go Authors. All rights reserved.
4// https://github.com/golang/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10// * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12// * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16// * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32package proto
33
34import (
35 "errors"
36 "fmt"
37 "math"
38 "reflect"
39 "sort"
40 "strconv"
41 "strings"
42 "sync"
43 "sync/atomic"
44 "unicode/utf8"
45)
46
47// a sizer takes a pointer to a field and the size of its tag, computes the size of
48// the encoded data.
49type sizer func(pointer, int) int
50
51// a marshaler takes a byte slice, a pointer to a field, and its tag (in wire format),
52// marshals the field to the end of the slice, returns the slice and error (if any).
53type marshaler func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error)
54
55// marshalInfo is the information used for marshaling a message.
56type marshalInfo struct {
57 typ reflect.Type
58 fields []*marshalFieldInfo
59 unrecognized field // offset of XXX_unrecognized
60 extensions field // offset of XXX_InternalExtensions
61 v1extensions field // offset of XXX_extensions
62 sizecache field // offset of XXX_sizecache
63 initialized int32 // 0 -- only typ is set, 1 -- fully initialized
64 messageset bool // uses message set wire format
65 hasmarshaler bool // has custom marshaler
66 sync.RWMutex // protect extElems map, also for initialization
67 extElems map[int32]*marshalElemInfo // info of extension elements
68}
69
70// marshalFieldInfo is the information used for marshaling a field of a message.
71type marshalFieldInfo struct {
72 field field
73 wiretag uint64 // tag in wire format
74 tagsize int // size of tag in wire format
75 sizer sizer
76 marshaler marshaler
77 isPointer bool
78 required bool // field is required
79 name string // name of the field, for error reporting
80 oneofElems map[reflect.Type]*marshalElemInfo // info of oneof elements
81}
82
83// marshalElemInfo is the information used for marshaling an extension or oneof element.
84type marshalElemInfo struct {
85 wiretag uint64 // tag in wire format
86 tagsize int // size of tag in wire format
87 sizer sizer
88 marshaler marshaler
89 isptr bool // elem is pointer typed, thus interface of this type is a direct interface (extension only)
90 deref bool // dereference the pointer before operating on it; implies isptr
91}
92
93var (
94 marshalInfoMap = map[reflect.Type]*marshalInfo{}
95 marshalInfoLock sync.Mutex
96)
97
98// getMarshalInfo returns the information to marshal a given type of message.
99// The info it returns may not necessarily initialized.
100// t is the type of the message (NOT the pointer to it).
101func getMarshalInfo(t reflect.Type) *marshalInfo {
102 marshalInfoLock.Lock()
103 u, ok := marshalInfoMap[t]
104 if !ok {
105 u = &marshalInfo{typ: t}
106 marshalInfoMap[t] = u
107 }
108 marshalInfoLock.Unlock()
109 return u
110}
111
112// Size is the entry point from generated code,
113// and should be ONLY called by generated code.
114// It computes the size of encoded data of msg.
115// a is a pointer to a place to store cached marshal info.
116func (a *InternalMessageInfo) Size(msg Message) int {
117 u := getMessageMarshalInfo(msg, a)
118 ptr := toPointer(&msg)
119 if ptr.isNil() {
120 // We get here if msg is a typed nil ((*SomeMessage)(nil)),
121 // so it satisfies the interface, and msg == nil wouldn't
122 // catch it. We don't want crash in this case.
123 return 0
124 }
125 return u.size(ptr)
126}
127
128// Marshal is the entry point from generated code,
129// and should be ONLY called by generated code.
130// It marshals msg to the end of b.
131// a is a pointer to a place to store cached marshal info.
132func (a *InternalMessageInfo) Marshal(b []byte, msg Message, deterministic bool) ([]byte, error) {
133 u := getMessageMarshalInfo(msg, a)
134 ptr := toPointer(&msg)
135 if ptr.isNil() {
136 // We get here if msg is a typed nil ((*SomeMessage)(nil)),
137 // so it satisfies the interface, and msg == nil wouldn't
138 // catch it. We don't want crash in this case.
139 return b, ErrNil
140 }
141 return u.marshal(b, ptr, deterministic)
142}
143
144func getMessageMarshalInfo(msg interface{}, a *InternalMessageInfo) *marshalInfo {
145 // u := a.marshal, but atomically.
146 // We use an atomic here to ensure memory consistency.
147 u := atomicLoadMarshalInfo(&a.marshal)
148 if u == nil {
149 // Get marshal information from type of message.
150 t := reflect.ValueOf(msg).Type()
151 if t.Kind() != reflect.Ptr {
152 panic(fmt.Sprintf("cannot handle non-pointer message type %v", t))
153 }
154 u = getMarshalInfo(t.Elem())
155 // Store it in the cache for later users.
156 // a.marshal = u, but atomically.
157 atomicStoreMarshalInfo(&a.marshal, u)
158 }
159 return u
160}
161
162// size is the main function to compute the size of the encoded data of a message.
163// ptr is the pointer to the message.
164func (u *marshalInfo) size(ptr pointer) int {
165 if atomic.LoadInt32(&u.initialized) == 0 {
166 u.computeMarshalInfo()
167 }
168
169 // If the message can marshal itself, let it do it, for compatibility.
170 // NOTE: This is not efficient.
171 if u.hasmarshaler {
172 m := ptr.asPointerTo(u.typ).Interface().(Marshaler)
173 b, _ := m.Marshal()
174 return len(b)
175 }
176
177 n := 0
178 for _, f := range u.fields {
179 if f.isPointer && ptr.offset(f.field).getPointer().isNil() {
180 // nil pointer always marshals to nothing
181 continue
182 }
183 n += f.sizer(ptr.offset(f.field), f.tagsize)
184 }
185 if u.extensions.IsValid() {
186 e := ptr.offset(u.extensions).toExtensions()
187 if u.messageset {
188 n += u.sizeMessageSet(e)
189 } else {
190 n += u.sizeExtensions(e)
191 }
192 }
193 if u.v1extensions.IsValid() {
194 m := *ptr.offset(u.v1extensions).toOldExtensions()
195 n += u.sizeV1Extensions(m)
196 }
197 if u.unrecognized.IsValid() {
198 s := *ptr.offset(u.unrecognized).toBytes()
199 n += len(s)
200 }
201 // cache the result for use in marshal
202 if u.sizecache.IsValid() {
203 atomic.StoreInt32(ptr.offset(u.sizecache).toInt32(), int32(n))
204 }
205 return n
206}
207
208// cachedsize gets the size from cache. If there is no cache (i.e. message is not generated),
209// fall back to compute the size.
210func (u *marshalInfo) cachedsize(ptr pointer) int {
211 if u.sizecache.IsValid() {
212 return int(atomic.LoadInt32(ptr.offset(u.sizecache).toInt32()))
213 }
214 return u.size(ptr)
215}
216
217// marshal is the main function to marshal a message. It takes a byte slice and appends
218// the encoded data to the end of the slice, returns the slice and error (if any).
219// ptr is the pointer to the message.
220// If deterministic is true, map is marshaled in deterministic order.
221func (u *marshalInfo) marshal(b []byte, ptr pointer, deterministic bool) ([]byte, error) {
222 if atomic.LoadInt32(&u.initialized) == 0 {
223 u.computeMarshalInfo()
224 }
225
226 // If the message can marshal itself, let it do it, for compatibility.
227 // NOTE: This is not efficient.
228 if u.hasmarshaler {
229 m := ptr.asPointerTo(u.typ).Interface().(Marshaler)
230 b1, err := m.Marshal()
231 b = append(b, b1...)
232 return b, err
233 }
234
235 var err, errLater error
236 // The old marshaler encodes extensions at beginning.
237 if u.extensions.IsValid() {
238 e := ptr.offset(u.extensions).toExtensions()
239 if u.messageset {
240 b, err = u.appendMessageSet(b, e, deterministic)
241 } else {
242 b, err = u.appendExtensions(b, e, deterministic)
243 }
244 if err != nil {
245 return b, err
246 }
247 }
248 if u.v1extensions.IsValid() {
249 m := *ptr.offset(u.v1extensions).toOldExtensions()
250 b, err = u.appendV1Extensions(b, m, deterministic)
251 if err != nil {
252 return b, err
253 }
254 }
255 for _, f := range u.fields {
256 if f.required {
257 if ptr.offset(f.field).getPointer().isNil() {
258 // Required field is not set.
259 // We record the error but keep going, to give a complete marshaling.
260 if errLater == nil {
261 errLater = &RequiredNotSetError{f.name}
262 }
263 continue
264 }
265 }
266 if f.isPointer && ptr.offset(f.field).getPointer().isNil() {
267 // nil pointer always marshals to nothing
268 continue
269 }
270 b, err = f.marshaler(b, ptr.offset(f.field), f.wiretag, deterministic)
271 if err != nil {
272 if err1, ok := err.(*RequiredNotSetError); ok {
273 // Required field in submessage is not set.
274 // We record the error but keep going, to give a complete marshaling.
275 if errLater == nil {
276 errLater = &RequiredNotSetError{f.name + "." + err1.field}
277 }
278 continue
279 }
280 if err == errRepeatedHasNil {
281 err = errors.New("proto: repeated field " + f.name + " has nil element")
282 }
283 if err == errInvalidUTF8 {
284 if errLater == nil {
285 fullName := revProtoTypes[reflect.PtrTo(u.typ)] + "." + f.name
286 errLater = &invalidUTF8Error{fullName}
287 }
288 continue
289 }
290 return b, err
291 }
292 }
293 if u.unrecognized.IsValid() {
294 s := *ptr.offset(u.unrecognized).toBytes()
295 b = append(b, s...)
296 }
297 return b, errLater
298}
299
300// computeMarshalInfo initializes the marshal info.
301func (u *marshalInfo) computeMarshalInfo() {
302 u.Lock()
303 defer u.Unlock()
304 if u.initialized != 0 { // non-atomic read is ok as it is protected by the lock
305 return
306 }
307
308 t := u.typ
309 u.unrecognized = invalidField
310 u.extensions = invalidField
311 u.v1extensions = invalidField
312 u.sizecache = invalidField
313
314 // If the message can marshal itself, let it do it, for compatibility.
315 // NOTE: This is not efficient.
316 if reflect.PtrTo(t).Implements(marshalerType) {
317 u.hasmarshaler = true
318 atomic.StoreInt32(&u.initialized, 1)
319 return
320 }
321
322 // get oneof implementers
323 var oneofImplementers []interface{}
324 switch m := reflect.Zero(reflect.PtrTo(t)).Interface().(type) {
325 case oneofFuncsIface:
326 _, _, _, oneofImplementers = m.XXX_OneofFuncs()
327 case oneofWrappersIface:
328 oneofImplementers = m.XXX_OneofWrappers()
329 }
330
331 n := t.NumField()
332
333 // deal with XXX fields first
334 for i := 0; i < t.NumField(); i++ {
335 f := t.Field(i)
336 if !strings.HasPrefix(f.Name, "XXX_") {
337 continue
338 }
339 switch f.Name {
340 case "XXX_sizecache":
341 u.sizecache = toField(&f)
342 case "XXX_unrecognized":
343 u.unrecognized = toField(&f)
344 case "XXX_InternalExtensions":
345 u.extensions = toField(&f)
346 u.messageset = f.Tag.Get("protobuf_messageset") == "1"
347 case "XXX_extensions":
348 u.v1extensions = toField(&f)
349 case "XXX_NoUnkeyedLiteral":
350 // nothing to do
351 default:
352 panic("unknown XXX field: " + f.Name)
353 }
354 n--
355 }
356
357 // normal fields
358 fields := make([]marshalFieldInfo, n) // batch allocation
359 u.fields = make([]*marshalFieldInfo, 0, n)
360 for i, j := 0, 0; i < t.NumField(); i++ {
361 f := t.Field(i)
362
363 if strings.HasPrefix(f.Name, "XXX_") {
364 continue
365 }
366 field := &fields[j]
367 j++
368 field.name = f.Name
369 u.fields = append(u.fields, field)
370 if f.Tag.Get("protobuf_oneof") != "" {
371 field.computeOneofFieldInfo(&f, oneofImplementers)
372 continue
373 }
374 if f.Tag.Get("protobuf") == "" {
375 // field has no tag (not in generated message), ignore it
376 u.fields = u.fields[:len(u.fields)-1]
377 j--
378 continue
379 }
380 field.computeMarshalFieldInfo(&f)
381 }
382
383 // fields are marshaled in tag order on the wire.
384 sort.Sort(byTag(u.fields))
385
386 atomic.StoreInt32(&u.initialized, 1)
387}
388
389// helper for sorting fields by tag
390type byTag []*marshalFieldInfo
391
392func (a byTag) Len() int { return len(a) }
393func (a byTag) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
394func (a byTag) Less(i, j int) bool { return a[i].wiretag < a[j].wiretag }
395
396// getExtElemInfo returns the information to marshal an extension element.
397// The info it returns is initialized.
398func (u *marshalInfo) getExtElemInfo(desc *ExtensionDesc) *marshalElemInfo {
399 // get from cache first
400 u.RLock()
401 e, ok := u.extElems[desc.Field]
402 u.RUnlock()
403 if ok {
404 return e
405 }
406
407 t := reflect.TypeOf(desc.ExtensionType) // pointer or slice to basic type or struct
408 tags := strings.Split(desc.Tag, ",")
409 tag, err := strconv.Atoi(tags[1])
410 if err != nil {
411 panic("tag is not an integer")
412 }
413 wt := wiretype(tags[0])
414 if t.Kind() == reflect.Ptr && t.Elem().Kind() != reflect.Struct {
415 t = t.Elem()
416 }
417 sizer, marshaler := typeMarshaler(t, tags, false, false)
418 var deref bool
419 if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
420 t = reflect.PtrTo(t)
421 deref = true
422 }
423 e = &marshalElemInfo{
424 wiretag: uint64(tag)<<3 | wt,
425 tagsize: SizeVarint(uint64(tag) << 3),
426 sizer: sizer,
427 marshaler: marshaler,
428 isptr: t.Kind() == reflect.Ptr,
429 deref: deref,
430 }
431
432 // update cache
433 u.Lock()
434 if u.extElems == nil {
435 u.extElems = make(map[int32]*marshalElemInfo)
436 }
437 u.extElems[desc.Field] = e
438 u.Unlock()
439 return e
440}
441
442// computeMarshalFieldInfo fills up the information to marshal a field.
443func (fi *marshalFieldInfo) computeMarshalFieldInfo(f *reflect.StructField) {
444 // parse protobuf tag of the field.
445 // tag has format of "bytes,49,opt,name=foo,def=hello!"
446 tags := strings.Split(f.Tag.Get("protobuf"), ",")
447 if tags[0] == "" {
448 return
449 }
450 tag, err := strconv.Atoi(tags[1])
451 if err != nil {
452 panic("tag is not an integer")
453 }
454 wt := wiretype(tags[0])
455 if tags[2] == "req" {
456 fi.required = true
457 }
458 fi.setTag(f, tag, wt)
459 fi.setMarshaler(f, tags)
460}
461
462func (fi *marshalFieldInfo) computeOneofFieldInfo(f *reflect.StructField, oneofImplementers []interface{}) {
463 fi.field = toField(f)
464 fi.wiretag = math.MaxInt32 // Use a large tag number, make oneofs sorted at the end. This tag will not appear on the wire.
465 fi.isPointer = true
466 fi.sizer, fi.marshaler = makeOneOfMarshaler(fi, f)
467 fi.oneofElems = make(map[reflect.Type]*marshalElemInfo)
468
469 ityp := f.Type // interface type
470 for _, o := range oneofImplementers {
471 t := reflect.TypeOf(o)
472 if !t.Implements(ityp) {
473 continue
474 }
475 sf := t.Elem().Field(0) // oneof implementer is a struct with a single field
476 tags := strings.Split(sf.Tag.Get("protobuf"), ",")
477 tag, err := strconv.Atoi(tags[1])
478 if err != nil {
479 panic("tag is not an integer")
480 }
481 wt := wiretype(tags[0])
482 sizer, marshaler := typeMarshaler(sf.Type, tags, false, true) // oneof should not omit any zero value
483 fi.oneofElems[t.Elem()] = &marshalElemInfo{
484 wiretag: uint64(tag)<<3 | wt,
485 tagsize: SizeVarint(uint64(tag) << 3),
486 sizer: sizer,
487 marshaler: marshaler,
488 }
489 }
490}
491
492// wiretype returns the wire encoding of the type.
493func wiretype(encoding string) uint64 {
494 switch encoding {
495 case "fixed32":
496 return WireFixed32
497 case "fixed64":
498 return WireFixed64
499 case "varint", "zigzag32", "zigzag64":
500 return WireVarint
501 case "bytes":
502 return WireBytes
503 case "group":
504 return WireStartGroup
505 }
506 panic("unknown wire type " + encoding)
507}
508
509// setTag fills up the tag (in wire format) and its size in the info of a field.
510func (fi *marshalFieldInfo) setTag(f *reflect.StructField, tag int, wt uint64) {
511 fi.field = toField(f)
512 fi.wiretag = uint64(tag)<<3 | wt
513 fi.tagsize = SizeVarint(uint64(tag) << 3)
514}
515
516// setMarshaler fills up the sizer and marshaler in the info of a field.
517func (fi *marshalFieldInfo) setMarshaler(f *reflect.StructField, tags []string) {
518 switch f.Type.Kind() {
519 case reflect.Map:
520 // map field
521 fi.isPointer = true
522 fi.sizer, fi.marshaler = makeMapMarshaler(f)
523 return
524 case reflect.Ptr, reflect.Slice:
525 fi.isPointer = true
526 }
527 fi.sizer, fi.marshaler = typeMarshaler(f.Type, tags, true, false)
528}
529
530// typeMarshaler returns the sizer and marshaler of a given field.
531// t is the type of the field.
532// tags is the generated "protobuf" tag of the field.
533// If nozero is true, zero value is not marshaled to the wire.
534// If oneof is true, it is a oneof field.
535func typeMarshaler(t reflect.Type, tags []string, nozero, oneof bool) (sizer, marshaler) {
536 encoding := tags[0]
537
538 pointer := false
539 slice := false
540 if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
541 slice = true
542 t = t.Elem()
543 }
544 if t.Kind() == reflect.Ptr {
545 pointer = true
546 t = t.Elem()
547 }
548
549 packed := false
550 proto3 := false
551 validateUTF8 := true
552 for i := 2; i < len(tags); i++ {
553 if tags[i] == "packed" {
554 packed = true
555 }
556 if tags[i] == "proto3" {
557 proto3 = true
558 }
559 }
560 validateUTF8 = validateUTF8 && proto3
561
562 switch t.Kind() {
563 case reflect.Bool:
564 if pointer {
565 return sizeBoolPtr, appendBoolPtr
566 }
567 if slice {
568 if packed {
569 return sizeBoolPackedSlice, appendBoolPackedSlice
570 }
571 return sizeBoolSlice, appendBoolSlice
572 }
573 if nozero {
574 return sizeBoolValueNoZero, appendBoolValueNoZero
575 }
576 return sizeBoolValue, appendBoolValue
577 case reflect.Uint32:
578 switch encoding {
579 case "fixed32":
580 if pointer {
581 return sizeFixed32Ptr, appendFixed32Ptr
582 }
583 if slice {
584 if packed {
585 return sizeFixed32PackedSlice, appendFixed32PackedSlice
586 }
587 return sizeFixed32Slice, appendFixed32Slice
588 }
589 if nozero {
590 return sizeFixed32ValueNoZero, appendFixed32ValueNoZero
591 }
592 return sizeFixed32Value, appendFixed32Value
593 case "varint":
594 if pointer {
595 return sizeVarint32Ptr, appendVarint32Ptr
596 }
597 if slice {
598 if packed {
599 return sizeVarint32PackedSlice, appendVarint32PackedSlice
600 }
601 return sizeVarint32Slice, appendVarint32Slice
602 }
603 if nozero {
604 return sizeVarint32ValueNoZero, appendVarint32ValueNoZero
605 }
606 return sizeVarint32Value, appendVarint32Value
607 }
608 case reflect.Int32:
609 switch encoding {
610 case "fixed32":
611 if pointer {
612 return sizeFixedS32Ptr, appendFixedS32Ptr
613 }
614 if slice {
615 if packed {
616 return sizeFixedS32PackedSlice, appendFixedS32PackedSlice
617 }
618 return sizeFixedS32Slice, appendFixedS32Slice
619 }
620 if nozero {
621 return sizeFixedS32ValueNoZero, appendFixedS32ValueNoZero
622 }
623 return sizeFixedS32Value, appendFixedS32Value
624 case "varint":
625 if pointer {
626 return sizeVarintS32Ptr, appendVarintS32Ptr
627 }
628 if slice {
629 if packed {
630 return sizeVarintS32PackedSlice, appendVarintS32PackedSlice
631 }
632 return sizeVarintS32Slice, appendVarintS32Slice
633 }
634 if nozero {
635 return sizeVarintS32ValueNoZero, appendVarintS32ValueNoZero
636 }
637 return sizeVarintS32Value, appendVarintS32Value
638 case "zigzag32":
639 if pointer {
640 return sizeZigzag32Ptr, appendZigzag32Ptr
641 }
642 if slice {
643 if packed {
644 return sizeZigzag32PackedSlice, appendZigzag32PackedSlice
645 }
646 return sizeZigzag32Slice, appendZigzag32Slice
647 }
648 if nozero {
649 return sizeZigzag32ValueNoZero, appendZigzag32ValueNoZero
650 }
651 return sizeZigzag32Value, appendZigzag32Value
652 }
653 case reflect.Uint64:
654 switch encoding {
655 case "fixed64":
656 if pointer {
657 return sizeFixed64Ptr, appendFixed64Ptr
658 }
659 if slice {
660 if packed {
661 return sizeFixed64PackedSlice, appendFixed64PackedSlice
662 }
663 return sizeFixed64Slice, appendFixed64Slice
664 }
665 if nozero {
666 return sizeFixed64ValueNoZero, appendFixed64ValueNoZero
667 }
668 return sizeFixed64Value, appendFixed64Value
669 case "varint":
670 if pointer {
671 return sizeVarint64Ptr, appendVarint64Ptr
672 }
673 if slice {
674 if packed {
675 return sizeVarint64PackedSlice, appendVarint64PackedSlice
676 }
677 return sizeVarint64Slice, appendVarint64Slice
678 }
679 if nozero {
680 return sizeVarint64ValueNoZero, appendVarint64ValueNoZero
681 }
682 return sizeVarint64Value, appendVarint64Value
683 }
684 case reflect.Int64:
685 switch encoding {
686 case "fixed64":
687 if pointer {
688 return sizeFixedS64Ptr, appendFixedS64Ptr
689 }
690 if slice {
691 if packed {
692 return sizeFixedS64PackedSlice, appendFixedS64PackedSlice
693 }
694 return sizeFixedS64Slice, appendFixedS64Slice
695 }
696 if nozero {
697 return sizeFixedS64ValueNoZero, appendFixedS64ValueNoZero
698 }
699 return sizeFixedS64Value, appendFixedS64Value
700 case "varint":
701 if pointer {
702 return sizeVarintS64Ptr, appendVarintS64Ptr
703 }
704 if slice {
705 if packed {
706 return sizeVarintS64PackedSlice, appendVarintS64PackedSlice
707 }
708 return sizeVarintS64Slice, appendVarintS64Slice
709 }
710 if nozero {
711 return sizeVarintS64ValueNoZero, appendVarintS64ValueNoZero
712 }
713 return sizeVarintS64Value, appendVarintS64Value
714 case "zigzag64":
715 if pointer {
716 return sizeZigzag64Ptr, appendZigzag64Ptr
717 }
718 if slice {
719 if packed {
720 return sizeZigzag64PackedSlice, appendZigzag64PackedSlice
721 }
722 return sizeZigzag64Slice, appendZigzag64Slice
723 }
724 if nozero {
725 return sizeZigzag64ValueNoZero, appendZigzag64ValueNoZero
726 }
727 return sizeZigzag64Value, appendZigzag64Value
728 }
729 case reflect.Float32:
730 if pointer {
731 return sizeFloat32Ptr, appendFloat32Ptr
732 }
733 if slice {
734 if packed {
735 return sizeFloat32PackedSlice, appendFloat32PackedSlice
736 }
737 return sizeFloat32Slice, appendFloat32Slice
738 }
739 if nozero {
740 return sizeFloat32ValueNoZero, appendFloat32ValueNoZero
741 }
742 return sizeFloat32Value, appendFloat32Value
743 case reflect.Float64:
744 if pointer {
745 return sizeFloat64Ptr, appendFloat64Ptr
746 }
747 if slice {
748 if packed {
749 return sizeFloat64PackedSlice, appendFloat64PackedSlice
750 }
751 return sizeFloat64Slice, appendFloat64Slice
752 }
753 if nozero {
754 return sizeFloat64ValueNoZero, appendFloat64ValueNoZero
755 }
756 return sizeFloat64Value, appendFloat64Value
757 case reflect.String:
758 if validateUTF8 {
759 if pointer {
760 return sizeStringPtr, appendUTF8StringPtr
761 }
762 if slice {
763 return sizeStringSlice, appendUTF8StringSlice
764 }
765 if nozero {
766 return sizeStringValueNoZero, appendUTF8StringValueNoZero
767 }
768 return sizeStringValue, appendUTF8StringValue
769 }
770 if pointer {
771 return sizeStringPtr, appendStringPtr
772 }
773 if slice {
774 return sizeStringSlice, appendStringSlice
775 }
776 if nozero {
777 return sizeStringValueNoZero, appendStringValueNoZero
778 }
779 return sizeStringValue, appendStringValue
780 case reflect.Slice:
781 if slice {
782 return sizeBytesSlice, appendBytesSlice
783 }
784 if oneof {
785 // Oneof bytes field may also have "proto3" tag.
786 // We want to marshal it as a oneof field. Do this
787 // check before the proto3 check.
788 return sizeBytesOneof, appendBytesOneof
789 }
790 if proto3 {
791 return sizeBytes3, appendBytes3
792 }
793 return sizeBytes, appendBytes
794 case reflect.Struct:
795 switch encoding {
796 case "group":
797 if slice {
798 return makeGroupSliceMarshaler(getMarshalInfo(t))
799 }
800 return makeGroupMarshaler(getMarshalInfo(t))
801 case "bytes":
802 if slice {
803 return makeMessageSliceMarshaler(getMarshalInfo(t))
804 }
805 return makeMessageMarshaler(getMarshalInfo(t))
806 }
807 }
808 panic(fmt.Sprintf("unknown or mismatched type: type: %v, wire type: %v", t, encoding))
809}
810
811// Below are functions to size/marshal a specific type of a field.
812// They are stored in the field's info, and called by function pointers.
813// They have type sizer or marshaler.
814
815func sizeFixed32Value(_ pointer, tagsize int) int {
816 return 4 + tagsize
817}
818func sizeFixed32ValueNoZero(ptr pointer, tagsize int) int {
819 v := *ptr.toUint32()
820 if v == 0 {
821 return 0
822 }
823 return 4 + tagsize
824}
825func sizeFixed32Ptr(ptr pointer, tagsize int) int {
826 p := *ptr.toUint32Ptr()
827 if p == nil {
828 return 0
829 }
830 return 4 + tagsize
831}
832func sizeFixed32Slice(ptr pointer, tagsize int) int {
833 s := *ptr.toUint32Slice()
834 return (4 + tagsize) * len(s)
835}
836func sizeFixed32PackedSlice(ptr pointer, tagsize int) int {
837 s := *ptr.toUint32Slice()
838 if len(s) == 0 {
839 return 0
840 }
841 return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
842}
843func sizeFixedS32Value(_ pointer, tagsize int) int {
844 return 4 + tagsize
845}
846func sizeFixedS32ValueNoZero(ptr pointer, tagsize int) int {
847 v := *ptr.toInt32()
848 if v == 0 {
849 return 0
850 }
851 return 4 + tagsize
852}
853func sizeFixedS32Ptr(ptr pointer, tagsize int) int {
854 p := ptr.getInt32Ptr()
855 if p == nil {
856 return 0
857 }
858 return 4 + tagsize
859}
860func sizeFixedS32Slice(ptr pointer, tagsize int) int {
861 s := ptr.getInt32Slice()
862 return (4 + tagsize) * len(s)
863}
864func sizeFixedS32PackedSlice(ptr pointer, tagsize int) int {
865 s := ptr.getInt32Slice()
866 if len(s) == 0 {
867 return 0
868 }
869 return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
870}
871func sizeFloat32Value(_ pointer, tagsize int) int {
872 return 4 + tagsize
873}
874func sizeFloat32ValueNoZero(ptr pointer, tagsize int) int {
875 v := math.Float32bits(*ptr.toFloat32())
876 if v == 0 {
877 return 0
878 }
879 return 4 + tagsize
880}
881func sizeFloat32Ptr(ptr pointer, tagsize int) int {
882 p := *ptr.toFloat32Ptr()
883 if p == nil {
884 return 0
885 }
886 return 4 + tagsize
887}
888func sizeFloat32Slice(ptr pointer, tagsize int) int {
889 s := *ptr.toFloat32Slice()
890 return (4 + tagsize) * len(s)
891}
892func sizeFloat32PackedSlice(ptr pointer, tagsize int) int {
893 s := *ptr.toFloat32Slice()
894 if len(s) == 0 {
895 return 0
896 }
897 return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
898}
899func sizeFixed64Value(_ pointer, tagsize int) int {
900 return 8 + tagsize
901}
902func sizeFixed64ValueNoZero(ptr pointer, tagsize int) int {
903 v := *ptr.toUint64()
904 if v == 0 {
905 return 0
906 }
907 return 8 + tagsize
908}
909func sizeFixed64Ptr(ptr pointer, tagsize int) int {
910 p := *ptr.toUint64Ptr()
911 if p == nil {
912 return 0
913 }
914 return 8 + tagsize
915}
916func sizeFixed64Slice(ptr pointer, tagsize int) int {
917 s := *ptr.toUint64Slice()
918 return (8 + tagsize) * len(s)
919}
920func sizeFixed64PackedSlice(ptr pointer, tagsize int) int {
921 s := *ptr.toUint64Slice()
922 if len(s) == 0 {
923 return 0
924 }
925 return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
926}
927func sizeFixedS64Value(_ pointer, tagsize int) int {
928 return 8 + tagsize
929}
930func sizeFixedS64ValueNoZero(ptr pointer, tagsize int) int {
931 v := *ptr.toInt64()
932 if v == 0 {
933 return 0
934 }
935 return 8 + tagsize
936}
937func sizeFixedS64Ptr(ptr pointer, tagsize int) int {
938 p := *ptr.toInt64Ptr()
939 if p == nil {
940 return 0
941 }
942 return 8 + tagsize
943}
944func sizeFixedS64Slice(ptr pointer, tagsize int) int {
945 s := *ptr.toInt64Slice()
946 return (8 + tagsize) * len(s)
947}
948func sizeFixedS64PackedSlice(ptr pointer, tagsize int) int {
949 s := *ptr.toInt64Slice()
950 if len(s) == 0 {
951 return 0
952 }
953 return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
954}
955func sizeFloat64Value(_ pointer, tagsize int) int {
956 return 8 + tagsize
957}
958func sizeFloat64ValueNoZero(ptr pointer, tagsize int) int {
959 v := math.Float64bits(*ptr.toFloat64())
960 if v == 0 {
961 return 0
962 }
963 return 8 + tagsize
964}
965func sizeFloat64Ptr(ptr pointer, tagsize int) int {
966 p := *ptr.toFloat64Ptr()
967 if p == nil {
968 return 0
969 }
970 return 8 + tagsize
971}
972func sizeFloat64Slice(ptr pointer, tagsize int) int {
973 s := *ptr.toFloat64Slice()
974 return (8 + tagsize) * len(s)
975}
976func sizeFloat64PackedSlice(ptr pointer, tagsize int) int {
977 s := *ptr.toFloat64Slice()
978 if len(s) == 0 {
979 return 0
980 }
981 return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
982}
983func sizeVarint32Value(ptr pointer, tagsize int) int {
984 v := *ptr.toUint32()
985 return SizeVarint(uint64(v)) + tagsize
986}
987func sizeVarint32ValueNoZero(ptr pointer, tagsize int) int {
988 v := *ptr.toUint32()
989 if v == 0 {
990 return 0
991 }
992 return SizeVarint(uint64(v)) + tagsize
993}
994func sizeVarint32Ptr(ptr pointer, tagsize int) int {
995 p := *ptr.toUint32Ptr()
996 if p == nil {
997 return 0
998 }
999 return SizeVarint(uint64(*p)) + tagsize
1000}
1001func sizeVarint32Slice(ptr pointer, tagsize int) int {
1002 s := *ptr.toUint32Slice()
1003 n := 0
1004 for _, v := range s {
1005 n += SizeVarint(uint64(v)) + tagsize
1006 }
1007 return n
1008}
1009func sizeVarint32PackedSlice(ptr pointer, tagsize int) int {
1010 s := *ptr.toUint32Slice()
1011 if len(s) == 0 {
1012 return 0
1013 }
1014 n := 0
1015 for _, v := range s {
1016 n += SizeVarint(uint64(v))
1017 }
1018 return n + SizeVarint(uint64(n)) + tagsize
1019}
1020func sizeVarintS32Value(ptr pointer, tagsize int) int {
1021 v := *ptr.toInt32()
1022 return SizeVarint(uint64(v)) + tagsize
1023}
1024func sizeVarintS32ValueNoZero(ptr pointer, tagsize int) int {
1025 v := *ptr.toInt32()
1026 if v == 0 {
1027 return 0
1028 }
1029 return SizeVarint(uint64(v)) + tagsize
1030}
1031func sizeVarintS32Ptr(ptr pointer, tagsize int) int {
1032 p := ptr.getInt32Ptr()
1033 if p == nil {
1034 return 0
1035 }
1036 return SizeVarint(uint64(*p)) + tagsize
1037}
1038func sizeVarintS32Slice(ptr pointer, tagsize int) int {
1039 s := ptr.getInt32Slice()
1040 n := 0
1041 for _, v := range s {
1042 n += SizeVarint(uint64(v)) + tagsize
1043 }
1044 return n
1045}
1046func sizeVarintS32PackedSlice(ptr pointer, tagsize int) int {
1047 s := ptr.getInt32Slice()
1048 if len(s) == 0 {
1049 return 0
1050 }
1051 n := 0
1052 for _, v := range s {
1053 n += SizeVarint(uint64(v))
1054 }
1055 return n + SizeVarint(uint64(n)) + tagsize
1056}
1057func sizeVarint64Value(ptr pointer, tagsize int) int {
1058 v := *ptr.toUint64()
1059 return SizeVarint(v) + tagsize
1060}
1061func sizeVarint64ValueNoZero(ptr pointer, tagsize int) int {
1062 v := *ptr.toUint64()
1063 if v == 0 {
1064 return 0
1065 }
1066 return SizeVarint(v) + tagsize
1067}
1068func sizeVarint64Ptr(ptr pointer, tagsize int) int {
1069 p := *ptr.toUint64Ptr()
1070 if p == nil {
1071 return 0
1072 }
1073 return SizeVarint(*p) + tagsize
1074}
1075func sizeVarint64Slice(ptr pointer, tagsize int) int {
1076 s := *ptr.toUint64Slice()
1077 n := 0
1078 for _, v := range s {
1079 n += SizeVarint(v) + tagsize
1080 }
1081 return n
1082}
1083func sizeVarint64PackedSlice(ptr pointer, tagsize int) int {
1084 s := *ptr.toUint64Slice()
1085 if len(s) == 0 {
1086 return 0
1087 }
1088 n := 0
1089 for _, v := range s {
1090 n += SizeVarint(v)
1091 }
1092 return n + SizeVarint(uint64(n)) + tagsize
1093}
1094func sizeVarintS64Value(ptr pointer, tagsize int) int {
1095 v := *ptr.toInt64()
1096 return SizeVarint(uint64(v)) + tagsize
1097}
1098func sizeVarintS64ValueNoZero(ptr pointer, tagsize int) int {
1099 v := *ptr.toInt64()
1100 if v == 0 {
1101 return 0
1102 }
1103 return SizeVarint(uint64(v)) + tagsize
1104}
1105func sizeVarintS64Ptr(ptr pointer, tagsize int) int {
1106 p := *ptr.toInt64Ptr()
1107 if p == nil {
1108 return 0
1109 }
1110 return SizeVarint(uint64(*p)) + tagsize
1111}
1112func sizeVarintS64Slice(ptr pointer, tagsize int) int {
1113 s := *ptr.toInt64Slice()
1114 n := 0
1115 for _, v := range s {
1116 n += SizeVarint(uint64(v)) + tagsize
1117 }
1118 return n
1119}
1120func sizeVarintS64PackedSlice(ptr pointer, tagsize int) int {
1121 s := *ptr.toInt64Slice()
1122 if len(s) == 0 {
1123 return 0
1124 }
1125 n := 0
1126 for _, v := range s {
1127 n += SizeVarint(uint64(v))
1128 }
1129 return n + SizeVarint(uint64(n)) + tagsize
1130}
1131func sizeZigzag32Value(ptr pointer, tagsize int) int {
1132 v := *ptr.toInt32()
1133 return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
1134}
1135func sizeZigzag32ValueNoZero(ptr pointer, tagsize int) int {
1136 v := *ptr.toInt32()
1137 if v == 0 {
1138 return 0
1139 }
1140 return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
1141}
1142func sizeZigzag32Ptr(ptr pointer, tagsize int) int {
1143 p := ptr.getInt32Ptr()
1144 if p == nil {
1145 return 0
1146 }
1147 v := *p
1148 return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
1149}
1150func sizeZigzag32Slice(ptr pointer, tagsize int) int {
1151 s := ptr.getInt32Slice()
1152 n := 0
1153 for _, v := range s {
1154 n += SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
1155 }
1156 return n
1157}
1158func sizeZigzag32PackedSlice(ptr pointer, tagsize int) int {
1159 s := ptr.getInt32Slice()
1160 if len(s) == 0 {
1161 return 0
1162 }
1163 n := 0
1164 for _, v := range s {
1165 n += SizeVarint(uint64((uint32(v) << 1) ^ uint32((int32(v) >> 31))))
1166 }
1167 return n + SizeVarint(uint64(n)) + tagsize
1168}
1169func sizeZigzag64Value(ptr pointer, tagsize int) int {
1170 v := *ptr.toInt64()
1171 return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
1172}
1173func sizeZigzag64ValueNoZero(ptr pointer, tagsize int) int {
1174 v := *ptr.toInt64()
1175 if v == 0 {
1176 return 0
1177 }
1178 return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
1179}
1180func sizeZigzag64Ptr(ptr pointer, tagsize int) int {
1181 p := *ptr.toInt64Ptr()
1182 if p == nil {
1183 return 0
1184 }
1185 v := *p
1186 return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
1187}
1188func sizeZigzag64Slice(ptr pointer, tagsize int) int {
1189 s := *ptr.toInt64Slice()
1190 n := 0
1191 for _, v := range s {
1192 n += SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
1193 }
1194 return n
1195}
1196func sizeZigzag64PackedSlice(ptr pointer, tagsize int) int {
1197 s := *ptr.toInt64Slice()
1198 if len(s) == 0 {
1199 return 0
1200 }
1201 n := 0
1202 for _, v := range s {
1203 n += SizeVarint(uint64(v<<1) ^ uint64((int64(v) >> 63)))
1204 }
1205 return n + SizeVarint(uint64(n)) + tagsize
1206}
1207func sizeBoolValue(_ pointer, tagsize int) int {
1208 return 1 + tagsize
1209}
1210func sizeBoolValueNoZero(ptr pointer, tagsize int) int {
1211 v := *ptr.toBool()
1212 if !v {
1213 return 0
1214 }
1215 return 1 + tagsize
1216}
1217func sizeBoolPtr(ptr pointer, tagsize int) int {
1218 p := *ptr.toBoolPtr()
1219 if p == nil {
1220 return 0
1221 }
1222 return 1 + tagsize
1223}
1224func sizeBoolSlice(ptr pointer, tagsize int) int {
1225 s := *ptr.toBoolSlice()
1226 return (1 + tagsize) * len(s)
1227}
1228func sizeBoolPackedSlice(ptr pointer, tagsize int) int {
1229 s := *ptr.toBoolSlice()
1230 if len(s) == 0 {
1231 return 0
1232 }
1233 return len(s) + SizeVarint(uint64(len(s))) + tagsize
1234}
1235func sizeStringValue(ptr pointer, tagsize int) int {
1236 v := *ptr.toString()
1237 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1238}
1239func sizeStringValueNoZero(ptr pointer, tagsize int) int {
1240 v := *ptr.toString()
1241 if v == "" {
1242 return 0
1243 }
1244 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1245}
1246func sizeStringPtr(ptr pointer, tagsize int) int {
1247 p := *ptr.toStringPtr()
1248 if p == nil {
1249 return 0
1250 }
1251 v := *p
1252 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1253}
1254func sizeStringSlice(ptr pointer, tagsize int) int {
1255 s := *ptr.toStringSlice()
1256 n := 0
1257 for _, v := range s {
1258 n += len(v) + SizeVarint(uint64(len(v))) + tagsize
1259 }
1260 return n
1261}
1262func sizeBytes(ptr pointer, tagsize int) int {
1263 v := *ptr.toBytes()
1264 if v == nil {
1265 return 0
1266 }
1267 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1268}
1269func sizeBytes3(ptr pointer, tagsize int) int {
1270 v := *ptr.toBytes()
1271 if len(v) == 0 {
1272 return 0
1273 }
1274 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1275}
1276func sizeBytesOneof(ptr pointer, tagsize int) int {
1277 v := *ptr.toBytes()
1278 return len(v) + SizeVarint(uint64(len(v))) + tagsize
1279}
1280func sizeBytesSlice(ptr pointer, tagsize int) int {
1281 s := *ptr.toBytesSlice()
1282 n := 0
1283 for _, v := range s {
1284 n += len(v) + SizeVarint(uint64(len(v))) + tagsize
1285 }
1286 return n
1287}
1288
1289// appendFixed32 appends an encoded fixed32 to b.
1290func appendFixed32(b []byte, v uint32) []byte {
1291 b = append(b,
1292 byte(v),
1293 byte(v>>8),
1294 byte(v>>16),
1295 byte(v>>24))
1296 return b
1297}
1298
1299// appendFixed64 appends an encoded fixed64 to b.
1300func appendFixed64(b []byte, v uint64) []byte {
1301 b = append(b,
1302 byte(v),
1303 byte(v>>8),
1304 byte(v>>16),
1305 byte(v>>24),
1306 byte(v>>32),
1307 byte(v>>40),
1308 byte(v>>48),
1309 byte(v>>56))
1310 return b
1311}
1312
1313// appendVarint appends an encoded varint to b.
1314func appendVarint(b []byte, v uint64) []byte {
1315 // TODO: make 1-byte (maybe 2-byte) case inline-able, once we
1316 // have non-leaf inliner.
1317 switch {
1318 case v < 1<<7:
1319 b = append(b, byte(v))
1320 case v < 1<<14:
1321 b = append(b,
1322 byte(v&0x7f|0x80),
1323 byte(v>>7))
1324 case v < 1<<21:
1325 b = append(b,
1326 byte(v&0x7f|0x80),
1327 byte((v>>7)&0x7f|0x80),
1328 byte(v>>14))
1329 case v < 1<<28:
1330 b = append(b,
1331 byte(v&0x7f|0x80),
1332 byte((v>>7)&0x7f|0x80),
1333 byte((v>>14)&0x7f|0x80),
1334 byte(v>>21))
1335 case v < 1<<35:
1336 b = append(b,
1337 byte(v&0x7f|0x80),
1338 byte((v>>7)&0x7f|0x80),
1339 byte((v>>14)&0x7f|0x80),
1340 byte((v>>21)&0x7f|0x80),
1341 byte(v>>28))
1342 case v < 1<<42:
1343 b = append(b,
1344 byte(v&0x7f|0x80),
1345 byte((v>>7)&0x7f|0x80),
1346 byte((v>>14)&0x7f|0x80),
1347 byte((v>>21)&0x7f|0x80),
1348 byte((v>>28)&0x7f|0x80),
1349 byte(v>>35))
1350 case v < 1<<49:
1351 b = append(b,
1352 byte(v&0x7f|0x80),
1353 byte((v>>7)&0x7f|0x80),
1354 byte((v>>14)&0x7f|0x80),
1355 byte((v>>21)&0x7f|0x80),
1356 byte((v>>28)&0x7f|0x80),
1357 byte((v>>35)&0x7f|0x80),
1358 byte(v>>42))
1359 case v < 1<<56:
1360 b = append(b,
1361 byte(v&0x7f|0x80),
1362 byte((v>>7)&0x7f|0x80),
1363 byte((v>>14)&0x7f|0x80),
1364 byte((v>>21)&0x7f|0x80),
1365 byte((v>>28)&0x7f|0x80),
1366 byte((v>>35)&0x7f|0x80),
1367 byte((v>>42)&0x7f|0x80),
1368 byte(v>>49))
1369 case v < 1<<63:
1370 b = append(b,
1371 byte(v&0x7f|0x80),
1372 byte((v>>7)&0x7f|0x80),
1373 byte((v>>14)&0x7f|0x80),
1374 byte((v>>21)&0x7f|0x80),
1375 byte((v>>28)&0x7f|0x80),
1376 byte((v>>35)&0x7f|0x80),
1377 byte((v>>42)&0x7f|0x80),
1378 byte((v>>49)&0x7f|0x80),
1379 byte(v>>56))
1380 default:
1381 b = append(b,
1382 byte(v&0x7f|0x80),
1383 byte((v>>7)&0x7f|0x80),
1384 byte((v>>14)&0x7f|0x80),
1385 byte((v>>21)&0x7f|0x80),
1386 byte((v>>28)&0x7f|0x80),
1387 byte((v>>35)&0x7f|0x80),
1388 byte((v>>42)&0x7f|0x80),
1389 byte((v>>49)&0x7f|0x80),
1390 byte((v>>56)&0x7f|0x80),
1391 1)
1392 }
1393 return b
1394}
1395
1396func appendFixed32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1397 v := *ptr.toUint32()
1398 b = appendVarint(b, wiretag)
1399 b = appendFixed32(b, v)
1400 return b, nil
1401}
1402func appendFixed32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1403 v := *ptr.toUint32()
1404 if v == 0 {
1405 return b, nil
1406 }
1407 b = appendVarint(b, wiretag)
1408 b = appendFixed32(b, v)
1409 return b, nil
1410}
1411func appendFixed32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1412 p := *ptr.toUint32Ptr()
1413 if p == nil {
1414 return b, nil
1415 }
1416 b = appendVarint(b, wiretag)
1417 b = appendFixed32(b, *p)
1418 return b, nil
1419}
1420func appendFixed32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1421 s := *ptr.toUint32Slice()
1422 for _, v := range s {
1423 b = appendVarint(b, wiretag)
1424 b = appendFixed32(b, v)
1425 }
1426 return b, nil
1427}
1428func appendFixed32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1429 s := *ptr.toUint32Slice()
1430 if len(s) == 0 {
1431 return b, nil
1432 }
1433 b = appendVarint(b, wiretag&^7|WireBytes)
1434 b = appendVarint(b, uint64(4*len(s)))
1435 for _, v := range s {
1436 b = appendFixed32(b, v)
1437 }
1438 return b, nil
1439}
1440func appendFixedS32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1441 v := *ptr.toInt32()
1442 b = appendVarint(b, wiretag)
1443 b = appendFixed32(b, uint32(v))
1444 return b, nil
1445}
1446func appendFixedS32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1447 v := *ptr.toInt32()
1448 if v == 0 {
1449 return b, nil
1450 }
1451 b = appendVarint(b, wiretag)
1452 b = appendFixed32(b, uint32(v))
1453 return b, nil
1454}
1455func appendFixedS32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1456 p := ptr.getInt32Ptr()
1457 if p == nil {
1458 return b, nil
1459 }
1460 b = appendVarint(b, wiretag)
1461 b = appendFixed32(b, uint32(*p))
1462 return b, nil
1463}
1464func appendFixedS32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1465 s := ptr.getInt32Slice()
1466 for _, v := range s {
1467 b = appendVarint(b, wiretag)
1468 b = appendFixed32(b, uint32(v))
1469 }
1470 return b, nil
1471}
1472func appendFixedS32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1473 s := ptr.getInt32Slice()
1474 if len(s) == 0 {
1475 return b, nil
1476 }
1477 b = appendVarint(b, wiretag&^7|WireBytes)
1478 b = appendVarint(b, uint64(4*len(s)))
1479 for _, v := range s {
1480 b = appendFixed32(b, uint32(v))
1481 }
1482 return b, nil
1483}
1484func appendFloat32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1485 v := math.Float32bits(*ptr.toFloat32())
1486 b = appendVarint(b, wiretag)
1487 b = appendFixed32(b, v)
1488 return b, nil
1489}
1490func appendFloat32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1491 v := math.Float32bits(*ptr.toFloat32())
1492 if v == 0 {
1493 return b, nil
1494 }
1495 b = appendVarint(b, wiretag)
1496 b = appendFixed32(b, v)
1497 return b, nil
1498}
1499func appendFloat32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1500 p := *ptr.toFloat32Ptr()
1501 if p == nil {
1502 return b, nil
1503 }
1504 b = appendVarint(b, wiretag)
1505 b = appendFixed32(b, math.Float32bits(*p))
1506 return b, nil
1507}
1508func appendFloat32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1509 s := *ptr.toFloat32Slice()
1510 for _, v := range s {
1511 b = appendVarint(b, wiretag)
1512 b = appendFixed32(b, math.Float32bits(v))
1513 }
1514 return b, nil
1515}
1516func appendFloat32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1517 s := *ptr.toFloat32Slice()
1518 if len(s) == 0 {
1519 return b, nil
1520 }
1521 b = appendVarint(b, wiretag&^7|WireBytes)
1522 b = appendVarint(b, uint64(4*len(s)))
1523 for _, v := range s {
1524 b = appendFixed32(b, math.Float32bits(v))
1525 }
1526 return b, nil
1527}
1528func appendFixed64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1529 v := *ptr.toUint64()
1530 b = appendVarint(b, wiretag)
1531 b = appendFixed64(b, v)
1532 return b, nil
1533}
1534func appendFixed64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1535 v := *ptr.toUint64()
1536 if v == 0 {
1537 return b, nil
1538 }
1539 b = appendVarint(b, wiretag)
1540 b = appendFixed64(b, v)
1541 return b, nil
1542}
1543func appendFixed64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1544 p := *ptr.toUint64Ptr()
1545 if p == nil {
1546 return b, nil
1547 }
1548 b = appendVarint(b, wiretag)
1549 b = appendFixed64(b, *p)
1550 return b, nil
1551}
1552func appendFixed64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1553 s := *ptr.toUint64Slice()
1554 for _, v := range s {
1555 b = appendVarint(b, wiretag)
1556 b = appendFixed64(b, v)
1557 }
1558 return b, nil
1559}
1560func appendFixed64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1561 s := *ptr.toUint64Slice()
1562 if len(s) == 0 {
1563 return b, nil
1564 }
1565 b = appendVarint(b, wiretag&^7|WireBytes)
1566 b = appendVarint(b, uint64(8*len(s)))
1567 for _, v := range s {
1568 b = appendFixed64(b, v)
1569 }
1570 return b, nil
1571}
1572func appendFixedS64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1573 v := *ptr.toInt64()
1574 b = appendVarint(b, wiretag)
1575 b = appendFixed64(b, uint64(v))
1576 return b, nil
1577}
1578func appendFixedS64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1579 v := *ptr.toInt64()
1580 if v == 0 {
1581 return b, nil
1582 }
1583 b = appendVarint(b, wiretag)
1584 b = appendFixed64(b, uint64(v))
1585 return b, nil
1586}
1587func appendFixedS64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1588 p := *ptr.toInt64Ptr()
1589 if p == nil {
1590 return b, nil
1591 }
1592 b = appendVarint(b, wiretag)
1593 b = appendFixed64(b, uint64(*p))
1594 return b, nil
1595}
1596func appendFixedS64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1597 s := *ptr.toInt64Slice()
1598 for _, v := range s {
1599 b = appendVarint(b, wiretag)
1600 b = appendFixed64(b, uint64(v))
1601 }
1602 return b, nil
1603}
1604func appendFixedS64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1605 s := *ptr.toInt64Slice()
1606 if len(s) == 0 {
1607 return b, nil
1608 }
1609 b = appendVarint(b, wiretag&^7|WireBytes)
1610 b = appendVarint(b, uint64(8*len(s)))
1611 for _, v := range s {
1612 b = appendFixed64(b, uint64(v))
1613 }
1614 return b, nil
1615}
1616func appendFloat64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1617 v := math.Float64bits(*ptr.toFloat64())
1618 b = appendVarint(b, wiretag)
1619 b = appendFixed64(b, v)
1620 return b, nil
1621}
1622func appendFloat64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1623 v := math.Float64bits(*ptr.toFloat64())
1624 if v == 0 {
1625 return b, nil
1626 }
1627 b = appendVarint(b, wiretag)
1628 b = appendFixed64(b, v)
1629 return b, nil
1630}
1631func appendFloat64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1632 p := *ptr.toFloat64Ptr()
1633 if p == nil {
1634 return b, nil
1635 }
1636 b = appendVarint(b, wiretag)
1637 b = appendFixed64(b, math.Float64bits(*p))
1638 return b, nil
1639}
1640func appendFloat64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1641 s := *ptr.toFloat64Slice()
1642 for _, v := range s {
1643 b = appendVarint(b, wiretag)
1644 b = appendFixed64(b, math.Float64bits(v))
1645 }
1646 return b, nil
1647}
1648func appendFloat64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1649 s := *ptr.toFloat64Slice()
1650 if len(s) == 0 {
1651 return b, nil
1652 }
1653 b = appendVarint(b, wiretag&^7|WireBytes)
1654 b = appendVarint(b, uint64(8*len(s)))
1655 for _, v := range s {
1656 b = appendFixed64(b, math.Float64bits(v))
1657 }
1658 return b, nil
1659}
1660func appendVarint32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1661 v := *ptr.toUint32()
1662 b = appendVarint(b, wiretag)
1663 b = appendVarint(b, uint64(v))
1664 return b, nil
1665}
1666func appendVarint32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1667 v := *ptr.toUint32()
1668 if v == 0 {
1669 return b, nil
1670 }
1671 b = appendVarint(b, wiretag)
1672 b = appendVarint(b, uint64(v))
1673 return b, nil
1674}
1675func appendVarint32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1676 p := *ptr.toUint32Ptr()
1677 if p == nil {
1678 return b, nil
1679 }
1680 b = appendVarint(b, wiretag)
1681 b = appendVarint(b, uint64(*p))
1682 return b, nil
1683}
1684func appendVarint32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1685 s := *ptr.toUint32Slice()
1686 for _, v := range s {
1687 b = appendVarint(b, wiretag)
1688 b = appendVarint(b, uint64(v))
1689 }
1690 return b, nil
1691}
1692func appendVarint32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1693 s := *ptr.toUint32Slice()
1694 if len(s) == 0 {
1695 return b, nil
1696 }
1697 b = appendVarint(b, wiretag&^7|WireBytes)
1698 // compute size
1699 n := 0
1700 for _, v := range s {
1701 n += SizeVarint(uint64(v))
1702 }
1703 b = appendVarint(b, uint64(n))
1704 for _, v := range s {
1705 b = appendVarint(b, uint64(v))
1706 }
1707 return b, nil
1708}
1709func appendVarintS32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1710 v := *ptr.toInt32()
1711 b = appendVarint(b, wiretag)
1712 b = appendVarint(b, uint64(v))
1713 return b, nil
1714}
1715func appendVarintS32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1716 v := *ptr.toInt32()
1717 if v == 0 {
1718 return b, nil
1719 }
1720 b = appendVarint(b, wiretag)
1721 b = appendVarint(b, uint64(v))
1722 return b, nil
1723}
1724func appendVarintS32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1725 p := ptr.getInt32Ptr()
1726 if p == nil {
1727 return b, nil
1728 }
1729 b = appendVarint(b, wiretag)
1730 b = appendVarint(b, uint64(*p))
1731 return b, nil
1732}
1733func appendVarintS32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1734 s := ptr.getInt32Slice()
1735 for _, v := range s {
1736 b = appendVarint(b, wiretag)
1737 b = appendVarint(b, uint64(v))
1738 }
1739 return b, nil
1740}
1741func appendVarintS32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1742 s := ptr.getInt32Slice()
1743 if len(s) == 0 {
1744 return b, nil
1745 }
1746 b = appendVarint(b, wiretag&^7|WireBytes)
1747 // compute size
1748 n := 0
1749 for _, v := range s {
1750 n += SizeVarint(uint64(v))
1751 }
1752 b = appendVarint(b, uint64(n))
1753 for _, v := range s {
1754 b = appendVarint(b, uint64(v))
1755 }
1756 return b, nil
1757}
1758func appendVarint64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1759 v := *ptr.toUint64()
1760 b = appendVarint(b, wiretag)
1761 b = appendVarint(b, v)
1762 return b, nil
1763}
1764func appendVarint64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1765 v := *ptr.toUint64()
1766 if v == 0 {
1767 return b, nil
1768 }
1769 b = appendVarint(b, wiretag)
1770 b = appendVarint(b, v)
1771 return b, nil
1772}
1773func appendVarint64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1774 p := *ptr.toUint64Ptr()
1775 if p == nil {
1776 return b, nil
1777 }
1778 b = appendVarint(b, wiretag)
1779 b = appendVarint(b, *p)
1780 return b, nil
1781}
1782func appendVarint64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1783 s := *ptr.toUint64Slice()
1784 for _, v := range s {
1785 b = appendVarint(b, wiretag)
1786 b = appendVarint(b, v)
1787 }
1788 return b, nil
1789}
1790func appendVarint64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1791 s := *ptr.toUint64Slice()
1792 if len(s) == 0 {
1793 return b, nil
1794 }
1795 b = appendVarint(b, wiretag&^7|WireBytes)
1796 // compute size
1797 n := 0
1798 for _, v := range s {
1799 n += SizeVarint(v)
1800 }
1801 b = appendVarint(b, uint64(n))
1802 for _, v := range s {
1803 b = appendVarint(b, v)
1804 }
1805 return b, nil
1806}
1807func appendVarintS64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1808 v := *ptr.toInt64()
1809 b = appendVarint(b, wiretag)
1810 b = appendVarint(b, uint64(v))
1811 return b, nil
1812}
1813func appendVarintS64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1814 v := *ptr.toInt64()
1815 if v == 0 {
1816 return b, nil
1817 }
1818 b = appendVarint(b, wiretag)
1819 b = appendVarint(b, uint64(v))
1820 return b, nil
1821}
1822func appendVarintS64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1823 p := *ptr.toInt64Ptr()
1824 if p == nil {
1825 return b, nil
1826 }
1827 b = appendVarint(b, wiretag)
1828 b = appendVarint(b, uint64(*p))
1829 return b, nil
1830}
1831func appendVarintS64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1832 s := *ptr.toInt64Slice()
1833 for _, v := range s {
1834 b = appendVarint(b, wiretag)
1835 b = appendVarint(b, uint64(v))
1836 }
1837 return b, nil
1838}
1839func appendVarintS64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1840 s := *ptr.toInt64Slice()
1841 if len(s) == 0 {
1842 return b, nil
1843 }
1844 b = appendVarint(b, wiretag&^7|WireBytes)
1845 // compute size
1846 n := 0
1847 for _, v := range s {
1848 n += SizeVarint(uint64(v))
1849 }
1850 b = appendVarint(b, uint64(n))
1851 for _, v := range s {
1852 b = appendVarint(b, uint64(v))
1853 }
1854 return b, nil
1855}
1856func appendZigzag32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1857 v := *ptr.toInt32()
1858 b = appendVarint(b, wiretag)
1859 b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
1860 return b, nil
1861}
1862func appendZigzag32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1863 v := *ptr.toInt32()
1864 if v == 0 {
1865 return b, nil
1866 }
1867 b = appendVarint(b, wiretag)
1868 b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
1869 return b, nil
1870}
1871func appendZigzag32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1872 p := ptr.getInt32Ptr()
1873 if p == nil {
1874 return b, nil
1875 }
1876 b = appendVarint(b, wiretag)
1877 v := *p
1878 b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
1879 return b, nil
1880}
1881func appendZigzag32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1882 s := ptr.getInt32Slice()
1883 for _, v := range s {
1884 b = appendVarint(b, wiretag)
1885 b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
1886 }
1887 return b, nil
1888}
1889func appendZigzag32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1890 s := ptr.getInt32Slice()
1891 if len(s) == 0 {
1892 return b, nil
1893 }
1894 b = appendVarint(b, wiretag&^7|WireBytes)
1895 // compute size
1896 n := 0
1897 for _, v := range s {
1898 n += SizeVarint(uint64((uint32(v) << 1) ^ uint32((int32(v) >> 31))))
1899 }
1900 b = appendVarint(b, uint64(n))
1901 for _, v := range s {
1902 b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
1903 }
1904 return b, nil
1905}
1906func appendZigzag64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1907 v := *ptr.toInt64()
1908 b = appendVarint(b, wiretag)
1909 b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
1910 return b, nil
1911}
1912func appendZigzag64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1913 v := *ptr.toInt64()
1914 if v == 0 {
1915 return b, nil
1916 }
1917 b = appendVarint(b, wiretag)
1918 b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
1919 return b, nil
1920}
1921func appendZigzag64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1922 p := *ptr.toInt64Ptr()
1923 if p == nil {
1924 return b, nil
1925 }
1926 b = appendVarint(b, wiretag)
1927 v := *p
1928 b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
1929 return b, nil
1930}
1931func appendZigzag64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1932 s := *ptr.toInt64Slice()
1933 for _, v := range s {
1934 b = appendVarint(b, wiretag)
1935 b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
1936 }
1937 return b, nil
1938}
1939func appendZigzag64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1940 s := *ptr.toInt64Slice()
1941 if len(s) == 0 {
1942 return b, nil
1943 }
1944 b = appendVarint(b, wiretag&^7|WireBytes)
1945 // compute size
1946 n := 0
1947 for _, v := range s {
1948 n += SizeVarint(uint64(v<<1) ^ uint64((int64(v) >> 63)))
1949 }
1950 b = appendVarint(b, uint64(n))
1951 for _, v := range s {
1952 b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
1953 }
1954 return b, nil
1955}
1956func appendBoolValue(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1957 v := *ptr.toBool()
1958 b = appendVarint(b, wiretag)
1959 if v {
1960 b = append(b, 1)
1961 } else {
1962 b = append(b, 0)
1963 }
1964 return b, nil
1965}
1966func appendBoolValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1967 v := *ptr.toBool()
1968 if !v {
1969 return b, nil
1970 }
1971 b = appendVarint(b, wiretag)
1972 b = append(b, 1)
1973 return b, nil
1974}
1975
1976func appendBoolPtr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1977 p := *ptr.toBoolPtr()
1978 if p == nil {
1979 return b, nil
1980 }
1981 b = appendVarint(b, wiretag)
1982 if *p {
1983 b = append(b, 1)
1984 } else {
1985 b = append(b, 0)
1986 }
1987 return b, nil
1988}
1989func appendBoolSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
1990 s := *ptr.toBoolSlice()
1991 for _, v := range s {
1992 b = appendVarint(b, wiretag)
1993 if v {
1994 b = append(b, 1)
1995 } else {
1996 b = append(b, 0)
1997 }
1998 }
1999 return b, nil
2000}
2001func appendBoolPackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2002 s := *ptr.toBoolSlice()
2003 if len(s) == 0 {
2004 return b, nil
2005 }
2006 b = appendVarint(b, wiretag&^7|WireBytes)
2007 b = appendVarint(b, uint64(len(s)))
2008 for _, v := range s {
2009 if v {
2010 b = append(b, 1)
2011 } else {
2012 b = append(b, 0)
2013 }
2014 }
2015 return b, nil
2016}
2017func appendStringValue(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2018 v := *ptr.toString()
2019 b = appendVarint(b, wiretag)
2020 b = appendVarint(b, uint64(len(v)))
2021 b = append(b, v...)
2022 return b, nil
2023}
2024func appendStringValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2025 v := *ptr.toString()
2026 if v == "" {
2027 return b, nil
2028 }
2029 b = appendVarint(b, wiretag)
2030 b = appendVarint(b, uint64(len(v)))
2031 b = append(b, v...)
2032 return b, nil
2033}
2034func appendStringPtr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2035 p := *ptr.toStringPtr()
2036 if p == nil {
2037 return b, nil
2038 }
2039 v := *p
2040 b = appendVarint(b, wiretag)
2041 b = appendVarint(b, uint64(len(v)))
2042 b = append(b, v...)
2043 return b, nil
2044}
2045func appendStringSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2046 s := *ptr.toStringSlice()
2047 for _, v := range s {
2048 b = appendVarint(b, wiretag)
2049 b = appendVarint(b, uint64(len(v)))
2050 b = append(b, v...)
2051 }
2052 return b, nil
2053}
2054func appendUTF8StringValue(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2055 var invalidUTF8 bool
2056 v := *ptr.toString()
2057 if !utf8.ValidString(v) {
2058 invalidUTF8 = true
2059 }
2060 b = appendVarint(b, wiretag)
2061 b = appendVarint(b, uint64(len(v)))
2062 b = append(b, v...)
2063 if invalidUTF8 {
2064 return b, errInvalidUTF8
2065 }
2066 return b, nil
2067}
2068func appendUTF8StringValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2069 var invalidUTF8 bool
2070 v := *ptr.toString()
2071 if v == "" {
2072 return b, nil
2073 }
2074 if !utf8.ValidString(v) {
2075 invalidUTF8 = true
2076 }
2077 b = appendVarint(b, wiretag)
2078 b = appendVarint(b, uint64(len(v)))
2079 b = append(b, v...)
2080 if invalidUTF8 {
2081 return b, errInvalidUTF8
2082 }
2083 return b, nil
2084}
2085func appendUTF8StringPtr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2086 var invalidUTF8 bool
2087 p := *ptr.toStringPtr()
2088 if p == nil {
2089 return b, nil
2090 }
2091 v := *p
2092 if !utf8.ValidString(v) {
2093 invalidUTF8 = true
2094 }
2095 b = appendVarint(b, wiretag)
2096 b = appendVarint(b, uint64(len(v)))
2097 b = append(b, v...)
2098 if invalidUTF8 {
2099 return b, errInvalidUTF8
2100 }
2101 return b, nil
2102}
2103func appendUTF8StringSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2104 var invalidUTF8 bool
2105 s := *ptr.toStringSlice()
2106 for _, v := range s {
2107 if !utf8.ValidString(v) {
2108 invalidUTF8 = true
2109 }
2110 b = appendVarint(b, wiretag)
2111 b = appendVarint(b, uint64(len(v)))
2112 b = append(b, v...)
2113 }
2114 if invalidUTF8 {
2115 return b, errInvalidUTF8
2116 }
2117 return b, nil
2118}
2119func appendBytes(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2120 v := *ptr.toBytes()
2121 if v == nil {
2122 return b, nil
2123 }
2124 b = appendVarint(b, wiretag)
2125 b = appendVarint(b, uint64(len(v)))
2126 b = append(b, v...)
2127 return b, nil
2128}
2129func appendBytes3(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2130 v := *ptr.toBytes()
2131 if len(v) == 0 {
2132 return b, nil
2133 }
2134 b = appendVarint(b, wiretag)
2135 b = appendVarint(b, uint64(len(v)))
2136 b = append(b, v...)
2137 return b, nil
2138}
2139func appendBytesOneof(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2140 v := *ptr.toBytes()
2141 b = appendVarint(b, wiretag)
2142 b = appendVarint(b, uint64(len(v)))
2143 b = append(b, v...)
2144 return b, nil
2145}
2146func appendBytesSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
2147 s := *ptr.toBytesSlice()
2148 for _, v := range s {
2149 b = appendVarint(b, wiretag)
2150 b = appendVarint(b, uint64(len(v)))
2151 b = append(b, v...)
2152 }
2153 return b, nil
2154}
2155
2156// makeGroupMarshaler returns the sizer and marshaler for a group.
2157// u is the marshal info of the underlying message.
2158func makeGroupMarshaler(u *marshalInfo) (sizer, marshaler) {
2159 return func(ptr pointer, tagsize int) int {
2160 p := ptr.getPointer()
2161 if p.isNil() {
2162 return 0
2163 }
2164 return u.size(p) + 2*tagsize
2165 },
2166 func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
2167 p := ptr.getPointer()
2168 if p.isNil() {
2169 return b, nil
2170 }
2171 var err error
2172 b = appendVarint(b, wiretag) // start group
2173 b, err = u.marshal(b, p, deterministic)
2174 b = appendVarint(b, wiretag+(WireEndGroup-WireStartGroup)) // end group
2175 return b, err
2176 }
2177}
2178
2179// makeGroupSliceMarshaler returns the sizer and marshaler for a group slice.
2180// u is the marshal info of the underlying message.
2181func makeGroupSliceMarshaler(u *marshalInfo) (sizer, marshaler) {
2182 return func(ptr pointer, tagsize int) int {
2183 s := ptr.getPointerSlice()
2184 n := 0
2185 for _, v := range s {
2186 if v.isNil() {
2187 continue
2188 }
2189 n += u.size(v) + 2*tagsize
2190 }
2191 return n
2192 },
2193 func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
2194 s := ptr.getPointerSlice()
2195 var err error
2196 var nerr nonFatal
2197 for _, v := range s {
2198 if v.isNil() {
2199 return b, errRepeatedHasNil
2200 }
2201 b = appendVarint(b, wiretag) // start group
2202 b, err = u.marshal(b, v, deterministic)
2203 b = appendVarint(b, wiretag+(WireEndGroup-WireStartGroup)) // end group
2204 if !nerr.Merge(err) {
2205 if err == ErrNil {
2206 err = errRepeatedHasNil
2207 }
2208 return b, err
2209 }
2210 }
2211 return b, nerr.E
2212 }
2213}
2214
2215// makeMessageMarshaler returns the sizer and marshaler for a message field.
2216// u is the marshal info of the message.
2217func makeMessageMarshaler(u *marshalInfo) (sizer, marshaler) {
2218 return func(ptr pointer, tagsize int) int {
2219 p := ptr.getPointer()
2220 if p.isNil() {
2221 return 0
2222 }
2223 siz := u.size(p)
2224 return siz + SizeVarint(uint64(siz)) + tagsize
2225 },
2226 func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
2227 p := ptr.getPointer()
2228 if p.isNil() {
2229 return b, nil
2230 }
2231 b = appendVarint(b, wiretag)
2232 siz := u.cachedsize(p)
2233 b = appendVarint(b, uint64(siz))
2234 return u.marshal(b, p, deterministic)
2235 }
2236}
2237
2238// makeMessageSliceMarshaler returns the sizer and marshaler for a message slice.
2239// u is the marshal info of the message.
2240func makeMessageSliceMarshaler(u *marshalInfo) (sizer, marshaler) {
2241 return func(ptr pointer, tagsize int) int {
2242 s := ptr.getPointerSlice()
2243 n := 0
2244 for _, v := range s {
2245 if v.isNil() {
2246 continue
2247 }
2248 siz := u.size(v)
2249 n += siz + SizeVarint(uint64(siz)) + tagsize
2250 }
2251 return n
2252 },
2253 func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
2254 s := ptr.getPointerSlice()
2255 var err error
2256 var nerr nonFatal
2257 for _, v := range s {
2258 if v.isNil() {
2259 return b, errRepeatedHasNil
2260 }
2261 b = appendVarint(b, wiretag)
2262 siz := u.cachedsize(v)
2263 b = appendVarint(b, uint64(siz))
2264 b, err = u.marshal(b, v, deterministic)
2265
2266 if !nerr.Merge(err) {
2267 if err == ErrNil {
2268 err = errRepeatedHasNil
2269 }
2270 return b, err
2271 }
2272 }
2273 return b, nerr.E
2274 }
2275}
2276
2277// makeMapMarshaler returns the sizer and marshaler for a map field.
2278// f is the pointer to the reflect data structure of the field.
2279func makeMapMarshaler(f *reflect.StructField) (sizer, marshaler) {
2280 // figure out key and value type
2281 t := f.Type
2282 keyType := t.Key()
2283 valType := t.Elem()
2284 keyTags := strings.Split(f.Tag.Get("protobuf_key"), ",")
2285 valTags := strings.Split(f.Tag.Get("protobuf_val"), ",")
2286 keySizer, keyMarshaler := typeMarshaler(keyType, keyTags, false, false) // don't omit zero value in map
2287 valSizer, valMarshaler := typeMarshaler(valType, valTags, false, false) // don't omit zero value in map
2288 keyWireTag := 1<<3 | wiretype(keyTags[0])
2289 valWireTag := 2<<3 | wiretype(valTags[0])
2290
2291 // We create an interface to get the addresses of the map key and value.
2292 // If value is pointer-typed, the interface is a direct interface, the
2293 // idata itself is the value. Otherwise, the idata is the pointer to the
2294 // value.
2295 // Key cannot be pointer-typed.
2296 valIsPtr := valType.Kind() == reflect.Ptr
2297
2298 // If value is a message with nested maps, calling
2299 // valSizer in marshal may be quadratic. We should use
2300 // cached version in marshal (but not in size).
2301 // If value is not message type, we don't have size cache,
2302 // but it cannot be nested either. Just use valSizer.
2303 valCachedSizer := valSizer
2304 if valIsPtr && valType.Elem().Kind() == reflect.Struct {
2305 u := getMarshalInfo(valType.Elem())
2306 valCachedSizer = func(ptr pointer, tagsize int) int {
2307 // Same as message sizer, but use cache.
2308 p := ptr.getPointer()
2309 if p.isNil() {
2310 return 0
2311 }
2312 siz := u.cachedsize(p)
2313 return siz + SizeVarint(uint64(siz)) + tagsize
2314 }
2315 }
2316 return func(ptr pointer, tagsize int) int {
2317 m := ptr.asPointerTo(t).Elem() // the map
2318 n := 0
2319 for _, k := range m.MapKeys() {
2320 ki := k.Interface()
2321 vi := m.MapIndex(k).Interface()
2322 kaddr := toAddrPointer(&ki, false, false) // pointer to key
2323 vaddr := toAddrPointer(&vi, valIsPtr, false) // pointer to value
2324 siz := keySizer(kaddr, 1) + valSizer(vaddr, 1) // tag of key = 1 (size=1), tag of val = 2 (size=1)
2325 n += siz + SizeVarint(uint64(siz)) + tagsize
2326 }
2327 return n
2328 },
2329 func(b []byte, ptr pointer, tag uint64, deterministic bool) ([]byte, error) {
2330 m := ptr.asPointerTo(t).Elem() // the map
2331 var err error
2332 keys := m.MapKeys()
2333 if len(keys) > 1 && deterministic {
2334 sort.Sort(mapKeys(keys))
2335 }
2336
2337 var nerr nonFatal
2338 for _, k := range keys {
2339 ki := k.Interface()
2340 vi := m.MapIndex(k).Interface()
2341 kaddr := toAddrPointer(&ki, false, false) // pointer to key
2342 vaddr := toAddrPointer(&vi, valIsPtr, false) // pointer to value
2343 b = appendVarint(b, tag)
2344 siz := keySizer(kaddr, 1) + valCachedSizer(vaddr, 1) // tag of key = 1 (size=1), tag of val = 2 (size=1)
2345 b = appendVarint(b, uint64(siz))
2346 b, err = keyMarshaler(b, kaddr, keyWireTag, deterministic)
2347 if !nerr.Merge(err) {
2348 return b, err
2349 }
2350 b, err = valMarshaler(b, vaddr, valWireTag, deterministic)
2351 if err != ErrNil && !nerr.Merge(err) { // allow nil value in map
2352 return b, err
2353 }
2354 }
2355 return b, nerr.E
2356 }
2357}
2358
2359// makeOneOfMarshaler returns the sizer and marshaler for a oneof field.
2360// fi is the marshal info of the field.
2361// f is the pointer to the reflect data structure of the field.
2362func makeOneOfMarshaler(fi *marshalFieldInfo, f *reflect.StructField) (sizer, marshaler) {
2363 // Oneof field is an interface. We need to get the actual data type on the fly.
2364 t := f.Type
2365 return func(ptr pointer, _ int) int {
2366 p := ptr.getInterfacePointer()
2367 if p.isNil() {
2368 return 0
2369 }
2370 v := ptr.asPointerTo(t).Elem().Elem().Elem() // *interface -> interface -> *struct -> struct
2371 telem := v.Type()
2372 e := fi.oneofElems[telem]
2373 return e.sizer(p, e.tagsize)
2374 },
2375 func(b []byte, ptr pointer, _ uint64, deterministic bool) ([]byte, error) {
2376 p := ptr.getInterfacePointer()
2377 if p.isNil() {
2378 return b, nil
2379 }
2380 v := ptr.asPointerTo(t).Elem().Elem().Elem() // *interface -> interface -> *struct -> struct
2381 telem := v.Type()
2382 if telem.Field(0).Type.Kind() == reflect.Ptr && p.getPointer().isNil() {
2383 return b, errOneofHasNil
2384 }
2385 e := fi.oneofElems[telem]
2386 return e.marshaler(b, p, e.wiretag, deterministic)
2387 }
2388}
2389
2390// sizeExtensions computes the size of encoded data for a XXX_InternalExtensions field.
2391func (u *marshalInfo) sizeExtensions(ext *XXX_InternalExtensions) int {
2392 m, mu := ext.extensionsRead()
2393 if m == nil {
2394 return 0
2395 }
2396 mu.Lock()
2397
2398 n := 0
2399 for _, e := range m {
2400 if e.value == nil || e.desc == nil {
2401 // Extension is only in its encoded form.
2402 n += len(e.enc)
2403 continue
2404 }
2405
2406 // We don't skip extensions that have an encoded form set,
2407 // because the extension value may have been mutated after
2408 // the last time this function was called.
2409 ei := u.getExtElemInfo(e.desc)
2410 v := e.value
2411 p := toAddrPointer(&v, ei.isptr, ei.deref)
2412 n += ei.sizer(p, ei.tagsize)
2413 }
2414 mu.Unlock()
2415 return n
2416}
2417
2418// appendExtensions marshals a XXX_InternalExtensions field to the end of byte slice b.
2419func (u *marshalInfo) appendExtensions(b []byte, ext *XXX_InternalExtensions, deterministic bool) ([]byte, error) {
2420 m, mu := ext.extensionsRead()
2421 if m == nil {
2422 return b, nil
2423 }
2424 mu.Lock()
2425 defer mu.Unlock()
2426
2427 var err error
2428 var nerr nonFatal
2429
2430 // Fast-path for common cases: zero or one extensions.
2431 // Don't bother sorting the keys.
2432 if len(m) <= 1 {
2433 for _, e := range m {
2434 if e.value == nil || e.desc == nil {
2435 // Extension is only in its encoded form.
2436 b = append(b, e.enc...)
2437 continue
2438 }
2439
2440 // We don't skip extensions that have an encoded form set,
2441 // because the extension value may have been mutated after
2442 // the last time this function was called.
2443
2444 ei := u.getExtElemInfo(e.desc)
2445 v := e.value
2446 p := toAddrPointer(&v, ei.isptr, ei.deref)
2447 b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
2448 if !nerr.Merge(err) {
2449 return b, err
2450 }
2451 }
2452 return b, nerr.E
2453 }
2454
2455 // Sort the keys to provide a deterministic encoding.
2456 // Not sure this is required, but the old code does it.
2457 keys := make([]int, 0, len(m))
2458 for k := range m {
2459 keys = append(keys, int(k))
2460 }
2461 sort.Ints(keys)
2462
2463 for _, k := range keys {
2464 e := m[int32(k)]
2465 if e.value == nil || e.desc == nil {
2466 // Extension is only in its encoded form.
2467 b = append(b, e.enc...)
2468 continue
2469 }
2470
2471 // We don't skip extensions that have an encoded form set,
2472 // because the extension value may have been mutated after
2473 // the last time this function was called.
2474
2475 ei := u.getExtElemInfo(e.desc)
2476 v := e.value
2477 p := toAddrPointer(&v, ei.isptr, ei.deref)
2478 b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
2479 if !nerr.Merge(err) {
2480 return b, err
2481 }
2482 }
2483 return b, nerr.E
2484}
2485
2486// message set format is:
2487// message MessageSet {
2488// repeated group Item = 1 {
2489// required int32 type_id = 2;
2490// required string message = 3;
2491// };
2492// }
2493
2494// sizeMessageSet computes the size of encoded data for a XXX_InternalExtensions field
2495// in message set format (above).
2496func (u *marshalInfo) sizeMessageSet(ext *XXX_InternalExtensions) int {
2497 m, mu := ext.extensionsRead()
2498 if m == nil {
2499 return 0
2500 }
2501 mu.Lock()
2502
2503 n := 0
2504 for id, e := range m {
2505 n += 2 // start group, end group. tag = 1 (size=1)
2506 n += SizeVarint(uint64(id)) + 1 // type_id, tag = 2 (size=1)
2507
2508 if e.value == nil || e.desc == nil {
2509 // Extension is only in its encoded form.
2510 msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
2511 siz := len(msgWithLen)
2512 n += siz + 1 // message, tag = 3 (size=1)
2513 continue
2514 }
2515
2516 // We don't skip extensions that have an encoded form set,
2517 // because the extension value may have been mutated after
2518 // the last time this function was called.
2519
2520 ei := u.getExtElemInfo(e.desc)
2521 v := e.value
2522 p := toAddrPointer(&v, ei.isptr, ei.deref)
2523 n += ei.sizer(p, 1) // message, tag = 3 (size=1)
2524 }
2525 mu.Unlock()
2526 return n
2527}
2528
2529// appendMessageSet marshals a XXX_InternalExtensions field in message set format (above)
2530// to the end of byte slice b.
2531func (u *marshalInfo) appendMessageSet(b []byte, ext *XXX_InternalExtensions, deterministic bool) ([]byte, error) {
2532 m, mu := ext.extensionsRead()
2533 if m == nil {
2534 return b, nil
2535 }
2536 mu.Lock()
2537 defer mu.Unlock()
2538
2539 var err error
2540 var nerr nonFatal
2541
2542 // Fast-path for common cases: zero or one extensions.
2543 // Don't bother sorting the keys.
2544 if len(m) <= 1 {
2545 for id, e := range m {
2546 b = append(b, 1<<3|WireStartGroup)
2547 b = append(b, 2<<3|WireVarint)
2548 b = appendVarint(b, uint64(id))
2549
2550 if e.value == nil || e.desc == nil {
2551 // Extension is only in its encoded form.
2552 msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
2553 b = append(b, 3<<3|WireBytes)
2554 b = append(b, msgWithLen...)
2555 b = append(b, 1<<3|WireEndGroup)
2556 continue
2557 }
2558
2559 // We don't skip extensions that have an encoded form set,
2560 // because the extension value may have been mutated after
2561 // the last time this function was called.
2562
2563 ei := u.getExtElemInfo(e.desc)
2564 v := e.value
2565 p := toAddrPointer(&v, ei.isptr, ei.deref)
2566 b, err = ei.marshaler(b, p, 3<<3|WireBytes, deterministic)
2567 if !nerr.Merge(err) {
2568 return b, err
2569 }
2570 b = append(b, 1<<3|WireEndGroup)
2571 }
2572 return b, nerr.E
2573 }
2574
2575 // Sort the keys to provide a deterministic encoding.
2576 keys := make([]int, 0, len(m))
2577 for k := range m {
2578 keys = append(keys, int(k))
2579 }
2580 sort.Ints(keys)
2581
2582 for _, id := range keys {
2583 e := m[int32(id)]
2584 b = append(b, 1<<3|WireStartGroup)
2585 b = append(b, 2<<3|WireVarint)
2586 b = appendVarint(b, uint64(id))
2587
2588 if e.value == nil || e.desc == nil {
2589 // Extension is only in its encoded form.
2590 msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
2591 b = append(b, 3<<3|WireBytes)
2592 b = append(b, msgWithLen...)
2593 b = append(b, 1<<3|WireEndGroup)
2594 continue
2595 }
2596
2597 // We don't skip extensions that have an encoded form set,
2598 // because the extension value may have been mutated after
2599 // the last time this function was called.
2600
2601 ei := u.getExtElemInfo(e.desc)
2602 v := e.value
2603 p := toAddrPointer(&v, ei.isptr, ei.deref)
2604 b, err = ei.marshaler(b, p, 3<<3|WireBytes, deterministic)
2605 b = append(b, 1<<3|WireEndGroup)
2606 if !nerr.Merge(err) {
2607 return b, err
2608 }
2609 }
2610 return b, nerr.E
2611}
2612
2613// sizeV1Extensions computes the size of encoded data for a V1-API extension field.
2614func (u *marshalInfo) sizeV1Extensions(m map[int32]Extension) int {
2615 if m == nil {
2616 return 0
2617 }
2618
2619 n := 0
2620 for _, e := range m {
2621 if e.value == nil || e.desc == nil {
2622 // Extension is only in its encoded form.
2623 n += len(e.enc)
2624 continue
2625 }
2626
2627 // We don't skip extensions that have an encoded form set,
2628 // because the extension value may have been mutated after
2629 // the last time this function was called.
2630
2631 ei := u.getExtElemInfo(e.desc)
2632 v := e.value
2633 p := toAddrPointer(&v, ei.isptr, ei.deref)
2634 n += ei.sizer(p, ei.tagsize)
2635 }
2636 return n
2637}
2638
2639// appendV1Extensions marshals a V1-API extension field to the end of byte slice b.
2640func (u *marshalInfo) appendV1Extensions(b []byte, m map[int32]Extension, deterministic bool) ([]byte, error) {
2641 if m == nil {
2642 return b, nil
2643 }
2644
2645 // Sort the keys to provide a deterministic encoding.
2646 keys := make([]int, 0, len(m))
2647 for k := range m {
2648 keys = append(keys, int(k))
2649 }
2650 sort.Ints(keys)
2651
2652 var err error
2653 var nerr nonFatal
2654 for _, k := range keys {
2655 e := m[int32(k)]
2656 if e.value == nil || e.desc == nil {
2657 // Extension is only in its encoded form.
2658 b = append(b, e.enc...)
2659 continue
2660 }
2661
2662 // We don't skip extensions that have an encoded form set,
2663 // because the extension value may have been mutated after
2664 // the last time this function was called.
2665
2666 ei := u.getExtElemInfo(e.desc)
2667 v := e.value
2668 p := toAddrPointer(&v, ei.isptr, ei.deref)
2669 b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
2670 if !nerr.Merge(err) {
2671 return b, err
2672 }
2673 }
2674 return b, nerr.E
2675}
2676
2677// newMarshaler is the interface representing objects that can marshal themselves.
2678//
2679// This exists to support protoc-gen-go generated messages.
2680// The proto package will stop type-asserting to this interface in the future.
2681//
2682// DO NOT DEPEND ON THIS.
2683type newMarshaler interface {
2684 XXX_Size() int
2685 XXX_Marshal(b []byte, deterministic bool) ([]byte, error)
2686}
2687
2688// Size returns the encoded size of a protocol buffer message.
2689// This is the main entry point.
2690func Size(pb Message) int {
2691 if m, ok := pb.(newMarshaler); ok {
2692 return m.XXX_Size()
2693 }
2694 if m, ok := pb.(Marshaler); ok {
2695 // If the message can marshal itself, let it do it, for compatibility.
2696 // NOTE: This is not efficient.
2697 b, _ := m.Marshal()
2698 return len(b)
2699 }
2700 // in case somehow we didn't generate the wrapper
2701 if pb == nil {
2702 return 0
2703 }
2704 var info InternalMessageInfo
2705 return info.Size(pb)
2706}
2707
2708// Marshal takes a protocol buffer message
2709// and encodes it into the wire format, returning the data.
2710// This is the main entry point.
2711func Marshal(pb Message) ([]byte, error) {
2712 if m, ok := pb.(newMarshaler); ok {
2713 siz := m.XXX_Size()
2714 b := make([]byte, 0, siz)
2715 return m.XXX_Marshal(b, false)
2716 }
2717 if m, ok := pb.(Marshaler); ok {
2718 // If the message can marshal itself, let it do it, for compatibility.
2719 // NOTE: This is not efficient.
2720 return m.Marshal()
2721 }
2722 // in case somehow we didn't generate the wrapper
2723 if pb == nil {
2724 return nil, ErrNil
2725 }
2726 var info InternalMessageInfo
2727 siz := info.Size(pb)
2728 b := make([]byte, 0, siz)
2729 return info.Marshal(b, pb, false)
2730}
2731
2732// Marshal takes a protocol buffer message
2733// and encodes it into the wire format, writing the result to the
2734// Buffer.
2735// This is an alternative entry point. It is not necessary to use
2736// a Buffer for most applications.
2737func (p *Buffer) Marshal(pb Message) error {
2738 var err error
2739 if m, ok := pb.(newMarshaler); ok {
2740 siz := m.XXX_Size()
2741 p.grow(siz) // make sure buf has enough capacity
2742 p.buf, err = m.XXX_Marshal(p.buf, p.deterministic)
2743 return err
2744 }
2745 if m, ok := pb.(Marshaler); ok {
2746 // If the message can marshal itself, let it do it, for compatibility.
2747 // NOTE: This is not efficient.
2748 b, err := m.Marshal()
2749 p.buf = append(p.buf, b...)
2750 return err
2751 }
2752 // in case somehow we didn't generate the wrapper
2753 if pb == nil {
2754 return ErrNil
2755 }
2756 var info InternalMessageInfo
2757 siz := info.Size(pb)
2758 p.grow(siz) // make sure buf has enough capacity
2759 p.buf, err = info.Marshal(p.buf, pb, p.deterministic)
2760 return err
2761}
2762
2763// grow grows the buffer's capacity, if necessary, to guarantee space for
2764// another n bytes. After grow(n), at least n bytes can be written to the
2765// buffer without another allocation.
2766func (p *Buffer) grow(n int) {
2767 need := len(p.buf) + n
2768 if need <= cap(p.buf) {
2769 return
2770 }
2771 newCap := len(p.buf) * 2
2772 if newCap < need {
2773 newCap = need
2774 }
2775 p.buf = append(make([]byte, 0, newCap), p.buf...)
2776}