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1 | // 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 | ||
32 | package proto | |
33 | ||
34 | import ( | |
35 | "errors" | |
36 | "fmt" | |
37 | "io" | |
38 | "math" | |
39 | "reflect" | |
40 | "strconv" | |
41 | "strings" | |
42 | "sync" | |
43 | "sync/atomic" | |
44 | "unicode/utf8" | |
45 | ) | |
46 | ||
47 | // Unmarshal is the entry point from the generated .pb.go files. | |
48 | // This function is not intended to be used by non-generated code. | |
49 | // This function is not subject to any compatibility guarantee. | |
50 | // msg contains a pointer to a protocol buffer struct. | |
51 | // b is the data to be unmarshaled into the protocol buffer. | |
52 | // a is a pointer to a place to store cached unmarshal information. | |
53 | func (a *InternalMessageInfo) Unmarshal(msg Message, b []byte) error { | |
54 | // Load the unmarshal information for this message type. | |
55 | // The atomic load ensures memory consistency. | |
56 | u := atomicLoadUnmarshalInfo(&a.unmarshal) | |
57 | if u == nil { | |
58 | // Slow path: find unmarshal info for msg, update a with it. | |
59 | u = getUnmarshalInfo(reflect.TypeOf(msg).Elem()) | |
60 | atomicStoreUnmarshalInfo(&a.unmarshal, u) | |
61 | } | |
62 | // Then do the unmarshaling. | |
63 | err := u.unmarshal(toPointer(&msg), b) | |
64 | return err | |
65 | } | |
66 | ||
67 | type unmarshalInfo struct { | |
68 | typ reflect.Type // type of the protobuf struct | |
69 | ||
70 | // 0 = only typ field is initialized | |
71 | // 1 = completely initialized | |
72 | initialized int32 | |
73 | lock sync.Mutex // prevents double initialization | |
74 | dense []unmarshalFieldInfo // fields indexed by tag # | |
75 | sparse map[uint64]unmarshalFieldInfo // fields indexed by tag # | |
76 | reqFields []string // names of required fields | |
77 | reqMask uint64 // 1<<len(reqFields)-1 | |
78 | unrecognized field // offset of []byte to put unrecognized data (or invalidField if we should throw it away) | |
79 | extensions field // offset of extensions field (of type proto.XXX_InternalExtensions), or invalidField if it does not exist | |
80 | oldExtensions field // offset of old-form extensions field (of type map[int]Extension) | |
81 | extensionRanges []ExtensionRange // if non-nil, implies extensions field is valid | |
82 | isMessageSet bool // if true, implies extensions field is valid | |
83 | } | |
84 | ||
85 | // An unmarshaler takes a stream of bytes and a pointer to a field of a message. | |
86 | // It decodes the field, stores it at f, and returns the unused bytes. | |
87 | // w is the wire encoding. | |
88 | // b is the data after the tag and wire encoding have been read. | |
89 | type unmarshaler func(b []byte, f pointer, w int) ([]byte, error) | |
90 | ||
91 | type unmarshalFieldInfo struct { | |
92 | // location of the field in the proto message structure. | |
93 | field field | |
94 | ||
95 | // function to unmarshal the data for the field. | |
96 | unmarshal unmarshaler | |
97 | ||
98 | // if a required field, contains a single set bit at this field's index in the required field list. | |
99 | reqMask uint64 | |
100 | ||
101 | name string // name of the field, for error reporting | |
102 | } | |
103 | ||
104 | var ( | |
105 | unmarshalInfoMap = map[reflect.Type]*unmarshalInfo{} | |
106 | unmarshalInfoLock sync.Mutex | |
107 | ) | |
108 | ||
109 | // getUnmarshalInfo returns the data structure which can be | |
110 | // subsequently used to unmarshal a message of the given type. | |
111 | // t is the type of the message (note: not pointer to message). | |
112 | func getUnmarshalInfo(t reflect.Type) *unmarshalInfo { | |
113 | // It would be correct to return a new unmarshalInfo | |
114 | // unconditionally. We would end up allocating one | |
115 | // per occurrence of that type as a message or submessage. | |
116 | // We use a cache here just to reduce memory usage. | |
117 | unmarshalInfoLock.Lock() | |
118 | defer unmarshalInfoLock.Unlock() | |
119 | u := unmarshalInfoMap[t] | |
120 | if u == nil { | |
121 | u = &unmarshalInfo{typ: t} | |
122 | // Note: we just set the type here. The rest of the fields | |
123 | // will be initialized on first use. | |
124 | unmarshalInfoMap[t] = u | |
125 | } | |
126 | return u | |
127 | } | |
128 | ||
129 | // unmarshal does the main work of unmarshaling a message. | |
130 | // u provides type information used to unmarshal the message. | |
131 | // m is a pointer to a protocol buffer message. | |
132 | // b is a byte stream to unmarshal into m. | |
133 | // This is top routine used when recursively unmarshaling submessages. | |
134 | func (u *unmarshalInfo) unmarshal(m pointer, b []byte) error { | |
135 | if atomic.LoadInt32(&u.initialized) == 0 { | |
136 | u.computeUnmarshalInfo() | |
137 | } | |
138 | if u.isMessageSet { | |
107c1cdb | 139 | return unmarshalMessageSet(b, m.offset(u.extensions).toExtensions()) |
15c0b25d AP |
140 | } |
141 | var reqMask uint64 // bitmask of required fields we've seen. | |
142 | var errLater error | |
143 | for len(b) > 0 { | |
144 | // Read tag and wire type. | |
145 | // Special case 1 and 2 byte varints. | |
146 | var x uint64 | |
147 | if b[0] < 128 { | |
148 | x = uint64(b[0]) | |
149 | b = b[1:] | |
150 | } else if len(b) >= 2 && b[1] < 128 { | |
151 | x = uint64(b[0]&0x7f) + uint64(b[1])<<7 | |
152 | b = b[2:] | |
153 | } else { | |
154 | var n int | |
155 | x, n = decodeVarint(b) | |
156 | if n == 0 { | |
157 | return io.ErrUnexpectedEOF | |
158 | } | |
159 | b = b[n:] | |
160 | } | |
161 | tag := x >> 3 | |
162 | wire := int(x) & 7 | |
163 | ||
164 | // Dispatch on the tag to one of the unmarshal* functions below. | |
165 | var f unmarshalFieldInfo | |
166 | if tag < uint64(len(u.dense)) { | |
167 | f = u.dense[tag] | |
168 | } else { | |
169 | f = u.sparse[tag] | |
170 | } | |
171 | if fn := f.unmarshal; fn != nil { | |
172 | var err error | |
173 | b, err = fn(b, m.offset(f.field), wire) | |
174 | if err == nil { | |
175 | reqMask |= f.reqMask | |
176 | continue | |
177 | } | |
178 | if r, ok := err.(*RequiredNotSetError); ok { | |
179 | // Remember this error, but keep parsing. We need to produce | |
180 | // a full parse even if a required field is missing. | |
181 | if errLater == nil { | |
182 | errLater = r | |
183 | } | |
184 | reqMask |= f.reqMask | |
185 | continue | |
186 | } | |
187 | if err != errInternalBadWireType { | |
188 | if err == errInvalidUTF8 { | |
189 | if errLater == nil { | |
190 | fullName := revProtoTypes[reflect.PtrTo(u.typ)] + "." + f.name | |
191 | errLater = &invalidUTF8Error{fullName} | |
192 | } | |
193 | continue | |
194 | } | |
195 | return err | |
196 | } | |
197 | // Fragments with bad wire type are treated as unknown fields. | |
198 | } | |
199 | ||
200 | // Unknown tag. | |
201 | if !u.unrecognized.IsValid() { | |
202 | // Don't keep unrecognized data; just skip it. | |
203 | var err error | |
204 | b, err = skipField(b, wire) | |
205 | if err != nil { | |
206 | return err | |
207 | } | |
208 | continue | |
209 | } | |
210 | // Keep unrecognized data around. | |
211 | // maybe in extensions, maybe in the unrecognized field. | |
212 | z := m.offset(u.unrecognized).toBytes() | |
213 | var emap map[int32]Extension | |
214 | var e Extension | |
215 | for _, r := range u.extensionRanges { | |
216 | if uint64(r.Start) <= tag && tag <= uint64(r.End) { | |
217 | if u.extensions.IsValid() { | |
218 | mp := m.offset(u.extensions).toExtensions() | |
219 | emap = mp.extensionsWrite() | |
220 | e = emap[int32(tag)] | |
221 | z = &e.enc | |
222 | break | |
223 | } | |
224 | if u.oldExtensions.IsValid() { | |
225 | p := m.offset(u.oldExtensions).toOldExtensions() | |
226 | emap = *p | |
227 | if emap == nil { | |
228 | emap = map[int32]Extension{} | |
229 | *p = emap | |
230 | } | |
231 | e = emap[int32(tag)] | |
232 | z = &e.enc | |
233 | break | |
234 | } | |
235 | panic("no extensions field available") | |
236 | } | |
237 | } | |
238 | ||
239 | // Use wire type to skip data. | |
240 | var err error | |
241 | b0 := b | |
242 | b, err = skipField(b, wire) | |
243 | if err != nil { | |
244 | return err | |
245 | } | |
246 | *z = encodeVarint(*z, tag<<3|uint64(wire)) | |
247 | *z = append(*z, b0[:len(b0)-len(b)]...) | |
248 | ||
249 | if emap != nil { | |
250 | emap[int32(tag)] = e | |
251 | } | |
252 | } | |
253 | if reqMask != u.reqMask && errLater == nil { | |
254 | // A required field of this message is missing. | |
255 | for _, n := range u.reqFields { | |
256 | if reqMask&1 == 0 { | |
257 | errLater = &RequiredNotSetError{n} | |
258 | } | |
259 | reqMask >>= 1 | |
260 | } | |
261 | } | |
262 | return errLater | |
263 | } | |
264 | ||
265 | // computeUnmarshalInfo fills in u with information for use | |
266 | // in unmarshaling protocol buffers of type u.typ. | |
267 | func (u *unmarshalInfo) computeUnmarshalInfo() { | |
268 | u.lock.Lock() | |
269 | defer u.lock.Unlock() | |
270 | if u.initialized != 0 { | |
271 | return | |
272 | } | |
273 | t := u.typ | |
274 | n := t.NumField() | |
275 | ||
276 | // Set up the "not found" value for the unrecognized byte buffer. | |
277 | // This is the default for proto3. | |
278 | u.unrecognized = invalidField | |
279 | u.extensions = invalidField | |
280 | u.oldExtensions = invalidField | |
281 | ||
282 | // List of the generated type and offset for each oneof field. | |
283 | type oneofField struct { | |
284 | ityp reflect.Type // interface type of oneof field | |
285 | field field // offset in containing message | |
286 | } | |
287 | var oneofFields []oneofField | |
288 | ||
289 | for i := 0; i < n; i++ { | |
290 | f := t.Field(i) | |
291 | if f.Name == "XXX_unrecognized" { | |
292 | // The byte slice used to hold unrecognized input is special. | |
293 | if f.Type != reflect.TypeOf(([]byte)(nil)) { | |
294 | panic("bad type for XXX_unrecognized field: " + f.Type.Name()) | |
295 | } | |
296 | u.unrecognized = toField(&f) | |
297 | continue | |
298 | } | |
299 | if f.Name == "XXX_InternalExtensions" { | |
300 | // Ditto here. | |
301 | if f.Type != reflect.TypeOf(XXX_InternalExtensions{}) { | |
302 | panic("bad type for XXX_InternalExtensions field: " + f.Type.Name()) | |
303 | } | |
304 | u.extensions = toField(&f) | |
305 | if f.Tag.Get("protobuf_messageset") == "1" { | |
306 | u.isMessageSet = true | |
307 | } | |
308 | continue | |
309 | } | |
310 | if f.Name == "XXX_extensions" { | |
311 | // An older form of the extensions field. | |
312 | if f.Type != reflect.TypeOf((map[int32]Extension)(nil)) { | |
313 | panic("bad type for XXX_extensions field: " + f.Type.Name()) | |
314 | } | |
315 | u.oldExtensions = toField(&f) | |
316 | continue | |
317 | } | |
318 | if f.Name == "XXX_NoUnkeyedLiteral" || f.Name == "XXX_sizecache" { | |
319 | continue | |
320 | } | |
321 | ||
322 | oneof := f.Tag.Get("protobuf_oneof") | |
323 | if oneof != "" { | |
324 | oneofFields = append(oneofFields, oneofField{f.Type, toField(&f)}) | |
325 | // The rest of oneof processing happens below. | |
326 | continue | |
327 | } | |
328 | ||
329 | tags := f.Tag.Get("protobuf") | |
330 | tagArray := strings.Split(tags, ",") | |
331 | if len(tagArray) < 2 { | |
332 | panic("protobuf tag not enough fields in " + t.Name() + "." + f.Name + ": " + tags) | |
333 | } | |
334 | tag, err := strconv.Atoi(tagArray[1]) | |
335 | if err != nil { | |
336 | panic("protobuf tag field not an integer: " + tagArray[1]) | |
337 | } | |
338 | ||
339 | name := "" | |
340 | for _, tag := range tagArray[3:] { | |
341 | if strings.HasPrefix(tag, "name=") { | |
342 | name = tag[5:] | |
343 | } | |
344 | } | |
345 | ||
346 | // Extract unmarshaling function from the field (its type and tags). | |
347 | unmarshal := fieldUnmarshaler(&f) | |
348 | ||
349 | // Required field? | |
350 | var reqMask uint64 | |
351 | if tagArray[2] == "req" { | |
352 | bit := len(u.reqFields) | |
353 | u.reqFields = append(u.reqFields, name) | |
354 | reqMask = uint64(1) << uint(bit) | |
355 | // TODO: if we have more than 64 required fields, we end up | |
356 | // not verifying that all required fields are present. | |
357 | // Fix this, perhaps using a count of required fields? | |
358 | } | |
359 | ||
360 | // Store the info in the correct slot in the message. | |
361 | u.setTag(tag, toField(&f), unmarshal, reqMask, name) | |
362 | } | |
363 | ||
364 | // Find any types associated with oneof fields. | |
107c1cdb ND |
365 | var oneofImplementers []interface{} |
366 | switch m := reflect.Zero(reflect.PtrTo(t)).Interface().(type) { | |
367 | case oneofFuncsIface: | |
368 | _, _, _, oneofImplementers = m.XXX_OneofFuncs() | |
369 | case oneofWrappersIface: | |
370 | oneofImplementers = m.XXX_OneofWrappers() | |
371 | } | |
372 | for _, v := range oneofImplementers { | |
373 | tptr := reflect.TypeOf(v) // *Msg_X | |
374 | typ := tptr.Elem() // Msg_X | |
375 | ||
376 | f := typ.Field(0) // oneof implementers have one field | |
377 | baseUnmarshal := fieldUnmarshaler(&f) | |
378 | tags := strings.Split(f.Tag.Get("protobuf"), ",") | |
379 | fieldNum, err := strconv.Atoi(tags[1]) | |
380 | if err != nil { | |
381 | panic("protobuf tag field not an integer: " + tags[1]) | |
382 | } | |
383 | var name string | |
384 | for _, tag := range tags { | |
385 | if strings.HasPrefix(tag, "name=") { | |
386 | name = strings.TrimPrefix(tag, "name=") | |
387 | break | |
15c0b25d | 388 | } |
107c1cdb | 389 | } |
15c0b25d | 390 | |
107c1cdb ND |
391 | // Find the oneof field that this struct implements. |
392 | // Might take O(n^2) to process all of the oneofs, but who cares. | |
393 | for _, of := range oneofFields { | |
394 | if tptr.Implements(of.ityp) { | |
395 | // We have found the corresponding interface for this struct. | |
396 | // That lets us know where this struct should be stored | |
397 | // when we encounter it during unmarshaling. | |
398 | unmarshal := makeUnmarshalOneof(typ, of.ityp, baseUnmarshal) | |
399 | u.setTag(fieldNum, of.field, unmarshal, 0, name) | |
15c0b25d AP |
400 | } |
401 | } | |
107c1cdb | 402 | |
15c0b25d AP |
403 | } |
404 | ||
405 | // Get extension ranges, if any. | |
107c1cdb | 406 | fn := reflect.Zero(reflect.PtrTo(t)).MethodByName("ExtensionRangeArray") |
15c0b25d AP |
407 | if fn.IsValid() { |
408 | if !u.extensions.IsValid() && !u.oldExtensions.IsValid() { | |
409 | panic("a message with extensions, but no extensions field in " + t.Name()) | |
410 | } | |
411 | u.extensionRanges = fn.Call(nil)[0].Interface().([]ExtensionRange) | |
412 | } | |
413 | ||
414 | // Explicitly disallow tag 0. This will ensure we flag an error | |
415 | // when decoding a buffer of all zeros. Without this code, we | |
416 | // would decode and skip an all-zero buffer of even length. | |
417 | // [0 0] is [tag=0/wiretype=varint varint-encoded-0]. | |
418 | u.setTag(0, zeroField, func(b []byte, f pointer, w int) ([]byte, error) { | |
419 | return nil, fmt.Errorf("proto: %s: illegal tag 0 (wire type %d)", t, w) | |
420 | }, 0, "") | |
421 | ||
422 | // Set mask for required field check. | |
423 | u.reqMask = uint64(1)<<uint(len(u.reqFields)) - 1 | |
424 | ||
425 | atomic.StoreInt32(&u.initialized, 1) | |
426 | } | |
427 | ||
428 | // setTag stores the unmarshal information for the given tag. | |
429 | // tag = tag # for field | |
430 | // field/unmarshal = unmarshal info for that field. | |
431 | // reqMask = if required, bitmask for field position in required field list. 0 otherwise. | |
432 | // name = short name of the field. | |
433 | func (u *unmarshalInfo) setTag(tag int, field field, unmarshal unmarshaler, reqMask uint64, name string) { | |
434 | i := unmarshalFieldInfo{field: field, unmarshal: unmarshal, reqMask: reqMask, name: name} | |
435 | n := u.typ.NumField() | |
436 | if tag >= 0 && (tag < 16 || tag < 2*n) { // TODO: what are the right numbers here? | |
437 | for len(u.dense) <= tag { | |
438 | u.dense = append(u.dense, unmarshalFieldInfo{}) | |
439 | } | |
440 | u.dense[tag] = i | |
441 | return | |
442 | } | |
443 | if u.sparse == nil { | |
444 | u.sparse = map[uint64]unmarshalFieldInfo{} | |
445 | } | |
446 | u.sparse[uint64(tag)] = i | |
447 | } | |
448 | ||
449 | // fieldUnmarshaler returns an unmarshaler for the given field. | |
450 | func fieldUnmarshaler(f *reflect.StructField) unmarshaler { | |
451 | if f.Type.Kind() == reflect.Map { | |
452 | return makeUnmarshalMap(f) | |
453 | } | |
454 | return typeUnmarshaler(f.Type, f.Tag.Get("protobuf")) | |
455 | } | |
456 | ||
457 | // typeUnmarshaler returns an unmarshaler for the given field type / field tag pair. | |
458 | func typeUnmarshaler(t reflect.Type, tags string) unmarshaler { | |
459 | tagArray := strings.Split(tags, ",") | |
460 | encoding := tagArray[0] | |
461 | name := "unknown" | |
462 | proto3 := false | |
463 | validateUTF8 := true | |
464 | for _, tag := range tagArray[3:] { | |
465 | if strings.HasPrefix(tag, "name=") { | |
466 | name = tag[5:] | |
467 | } | |
468 | if tag == "proto3" { | |
469 | proto3 = true | |
470 | } | |
471 | } | |
472 | validateUTF8 = validateUTF8 && proto3 | |
473 | ||
474 | // Figure out packaging (pointer, slice, or both) | |
475 | slice := false | |
476 | pointer := false | |
477 | if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 { | |
478 | slice = true | |
479 | t = t.Elem() | |
480 | } | |
481 | if t.Kind() == reflect.Ptr { | |
482 | pointer = true | |
483 | t = t.Elem() | |
484 | } | |
485 | ||
486 | // We'll never have both pointer and slice for basic types. | |
487 | if pointer && slice && t.Kind() != reflect.Struct { | |
488 | panic("both pointer and slice for basic type in " + t.Name()) | |
489 | } | |
490 | ||
491 | switch t.Kind() { | |
492 | case reflect.Bool: | |
493 | if pointer { | |
494 | return unmarshalBoolPtr | |
495 | } | |
496 | if slice { | |
497 | return unmarshalBoolSlice | |
498 | } | |
499 | return unmarshalBoolValue | |
500 | case reflect.Int32: | |
501 | switch encoding { | |
502 | case "fixed32": | |
503 | if pointer { | |
504 | return unmarshalFixedS32Ptr | |
505 | } | |
506 | if slice { | |
507 | return unmarshalFixedS32Slice | |
508 | } | |
509 | return unmarshalFixedS32Value | |
510 | case "varint": | |
511 | // this could be int32 or enum | |
512 | if pointer { | |
513 | return unmarshalInt32Ptr | |
514 | } | |
515 | if slice { | |
516 | return unmarshalInt32Slice | |
517 | } | |
518 | return unmarshalInt32Value | |
519 | case "zigzag32": | |
520 | if pointer { | |
521 | return unmarshalSint32Ptr | |
522 | } | |
523 | if slice { | |
524 | return unmarshalSint32Slice | |
525 | } | |
526 | return unmarshalSint32Value | |
527 | } | |
528 | case reflect.Int64: | |
529 | switch encoding { | |
530 | case "fixed64": | |
531 | if pointer { | |
532 | return unmarshalFixedS64Ptr | |
533 | } | |
534 | if slice { | |
535 | return unmarshalFixedS64Slice | |
536 | } | |
537 | return unmarshalFixedS64Value | |
538 | case "varint": | |
539 | if pointer { | |
540 | return unmarshalInt64Ptr | |
541 | } | |
542 | if slice { | |
543 | return unmarshalInt64Slice | |
544 | } | |
545 | return unmarshalInt64Value | |
546 | case "zigzag64": | |
547 | if pointer { | |
548 | return unmarshalSint64Ptr | |
549 | } | |
550 | if slice { | |
551 | return unmarshalSint64Slice | |
552 | } | |
553 | return unmarshalSint64Value | |
554 | } | |
555 | case reflect.Uint32: | |
556 | switch encoding { | |
557 | case "fixed32": | |
558 | if pointer { | |
559 | return unmarshalFixed32Ptr | |
560 | } | |
561 | if slice { | |
562 | return unmarshalFixed32Slice | |
563 | } | |
564 | return unmarshalFixed32Value | |
565 | case "varint": | |
566 | if pointer { | |
567 | return unmarshalUint32Ptr | |
568 | } | |
569 | if slice { | |
570 | return unmarshalUint32Slice | |
571 | } | |
572 | return unmarshalUint32Value | |
573 | } | |
574 | case reflect.Uint64: | |
575 | switch encoding { | |
576 | case "fixed64": | |
577 | if pointer { | |
578 | return unmarshalFixed64Ptr | |
579 | } | |
580 | if slice { | |
581 | return unmarshalFixed64Slice | |
582 | } | |
583 | return unmarshalFixed64Value | |
584 | case "varint": | |
585 | if pointer { | |
586 | return unmarshalUint64Ptr | |
587 | } | |
588 | if slice { | |
589 | return unmarshalUint64Slice | |
590 | } | |
591 | return unmarshalUint64Value | |
592 | } | |
593 | case reflect.Float32: | |
594 | if pointer { | |
595 | return unmarshalFloat32Ptr | |
596 | } | |
597 | if slice { | |
598 | return unmarshalFloat32Slice | |
599 | } | |
600 | return unmarshalFloat32Value | |
601 | case reflect.Float64: | |
602 | if pointer { | |
603 | return unmarshalFloat64Ptr | |
604 | } | |
605 | if slice { | |
606 | return unmarshalFloat64Slice | |
607 | } | |
608 | return unmarshalFloat64Value | |
609 | case reflect.Map: | |
610 | panic("map type in typeUnmarshaler in " + t.Name()) | |
611 | case reflect.Slice: | |
612 | if pointer { | |
613 | panic("bad pointer in slice case in " + t.Name()) | |
614 | } | |
615 | if slice { | |
616 | return unmarshalBytesSlice | |
617 | } | |
618 | return unmarshalBytesValue | |
619 | case reflect.String: | |
620 | if validateUTF8 { | |
621 | if pointer { | |
622 | return unmarshalUTF8StringPtr | |
623 | } | |
624 | if slice { | |
625 | return unmarshalUTF8StringSlice | |
626 | } | |
627 | return unmarshalUTF8StringValue | |
628 | } | |
629 | if pointer { | |
630 | return unmarshalStringPtr | |
631 | } | |
632 | if slice { | |
633 | return unmarshalStringSlice | |
634 | } | |
635 | return unmarshalStringValue | |
636 | case reflect.Struct: | |
637 | // message or group field | |
638 | if !pointer { | |
639 | panic(fmt.Sprintf("message/group field %s:%s without pointer", t, encoding)) | |
640 | } | |
641 | switch encoding { | |
642 | case "bytes": | |
643 | if slice { | |
644 | return makeUnmarshalMessageSlicePtr(getUnmarshalInfo(t), name) | |
645 | } | |
646 | return makeUnmarshalMessagePtr(getUnmarshalInfo(t), name) | |
647 | case "group": | |
648 | if slice { | |
649 | return makeUnmarshalGroupSlicePtr(getUnmarshalInfo(t), name) | |
650 | } | |
651 | return makeUnmarshalGroupPtr(getUnmarshalInfo(t), name) | |
652 | } | |
653 | } | |
654 | panic(fmt.Sprintf("unmarshaler not found type:%s encoding:%s", t, encoding)) | |
655 | } | |
656 | ||
657 | // Below are all the unmarshalers for individual fields of various types. | |
658 | ||
659 | func unmarshalInt64Value(b []byte, f pointer, w int) ([]byte, error) { | |
660 | if w != WireVarint { | |
661 | return b, errInternalBadWireType | |
662 | } | |
663 | x, n := decodeVarint(b) | |
664 | if n == 0 { | |
665 | return nil, io.ErrUnexpectedEOF | |
666 | } | |
667 | b = b[n:] | |
668 | v := int64(x) | |
669 | *f.toInt64() = v | |
670 | return b, nil | |
671 | } | |
672 | ||
673 | func unmarshalInt64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
674 | if w != WireVarint { | |
675 | return b, errInternalBadWireType | |
676 | } | |
677 | x, n := decodeVarint(b) | |
678 | if n == 0 { | |
679 | return nil, io.ErrUnexpectedEOF | |
680 | } | |
681 | b = b[n:] | |
682 | v := int64(x) | |
683 | *f.toInt64Ptr() = &v | |
684 | return b, nil | |
685 | } | |
686 | ||
687 | func unmarshalInt64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
688 | if w == WireBytes { // packed | |
689 | x, n := decodeVarint(b) | |
690 | if n == 0 { | |
691 | return nil, io.ErrUnexpectedEOF | |
692 | } | |
693 | b = b[n:] | |
694 | if x > uint64(len(b)) { | |
695 | return nil, io.ErrUnexpectedEOF | |
696 | } | |
697 | res := b[x:] | |
698 | b = b[:x] | |
699 | for len(b) > 0 { | |
700 | x, n = decodeVarint(b) | |
701 | if n == 0 { | |
702 | return nil, io.ErrUnexpectedEOF | |
703 | } | |
704 | b = b[n:] | |
705 | v := int64(x) | |
706 | s := f.toInt64Slice() | |
707 | *s = append(*s, v) | |
708 | } | |
709 | return res, nil | |
710 | } | |
711 | if w != WireVarint { | |
712 | return b, errInternalBadWireType | |
713 | } | |
714 | x, n := decodeVarint(b) | |
715 | if n == 0 { | |
716 | return nil, io.ErrUnexpectedEOF | |
717 | } | |
718 | b = b[n:] | |
719 | v := int64(x) | |
720 | s := f.toInt64Slice() | |
721 | *s = append(*s, v) | |
722 | return b, nil | |
723 | } | |
724 | ||
725 | func unmarshalSint64Value(b []byte, f pointer, w int) ([]byte, error) { | |
726 | if w != WireVarint { | |
727 | return b, errInternalBadWireType | |
728 | } | |
729 | x, n := decodeVarint(b) | |
730 | if n == 0 { | |
731 | return nil, io.ErrUnexpectedEOF | |
732 | } | |
733 | b = b[n:] | |
734 | v := int64(x>>1) ^ int64(x)<<63>>63 | |
735 | *f.toInt64() = v | |
736 | return b, nil | |
737 | } | |
738 | ||
739 | func unmarshalSint64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
740 | if w != WireVarint { | |
741 | return b, errInternalBadWireType | |
742 | } | |
743 | x, n := decodeVarint(b) | |
744 | if n == 0 { | |
745 | return nil, io.ErrUnexpectedEOF | |
746 | } | |
747 | b = b[n:] | |
748 | v := int64(x>>1) ^ int64(x)<<63>>63 | |
749 | *f.toInt64Ptr() = &v | |
750 | return b, nil | |
751 | } | |
752 | ||
753 | func unmarshalSint64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
754 | if w == WireBytes { // packed | |
755 | x, n := decodeVarint(b) | |
756 | if n == 0 { | |
757 | return nil, io.ErrUnexpectedEOF | |
758 | } | |
759 | b = b[n:] | |
760 | if x > uint64(len(b)) { | |
761 | return nil, io.ErrUnexpectedEOF | |
762 | } | |
763 | res := b[x:] | |
764 | b = b[:x] | |
765 | for len(b) > 0 { | |
766 | x, n = decodeVarint(b) | |
767 | if n == 0 { | |
768 | return nil, io.ErrUnexpectedEOF | |
769 | } | |
770 | b = b[n:] | |
771 | v := int64(x>>1) ^ int64(x)<<63>>63 | |
772 | s := f.toInt64Slice() | |
773 | *s = append(*s, v) | |
774 | } | |
775 | return res, nil | |
776 | } | |
777 | if w != WireVarint { | |
778 | return b, errInternalBadWireType | |
779 | } | |
780 | x, n := decodeVarint(b) | |
781 | if n == 0 { | |
782 | return nil, io.ErrUnexpectedEOF | |
783 | } | |
784 | b = b[n:] | |
785 | v := int64(x>>1) ^ int64(x)<<63>>63 | |
786 | s := f.toInt64Slice() | |
787 | *s = append(*s, v) | |
788 | return b, nil | |
789 | } | |
790 | ||
791 | func unmarshalUint64Value(b []byte, f pointer, w int) ([]byte, error) { | |
792 | if w != WireVarint { | |
793 | return b, errInternalBadWireType | |
794 | } | |
795 | x, n := decodeVarint(b) | |
796 | if n == 0 { | |
797 | return nil, io.ErrUnexpectedEOF | |
798 | } | |
799 | b = b[n:] | |
800 | v := uint64(x) | |
801 | *f.toUint64() = v | |
802 | return b, nil | |
803 | } | |
804 | ||
805 | func unmarshalUint64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
806 | if w != WireVarint { | |
807 | return b, errInternalBadWireType | |
808 | } | |
809 | x, n := decodeVarint(b) | |
810 | if n == 0 { | |
811 | return nil, io.ErrUnexpectedEOF | |
812 | } | |
813 | b = b[n:] | |
814 | v := uint64(x) | |
815 | *f.toUint64Ptr() = &v | |
816 | return b, nil | |
817 | } | |
818 | ||
819 | func unmarshalUint64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
820 | if w == WireBytes { // packed | |
821 | x, n := decodeVarint(b) | |
822 | if n == 0 { | |
823 | return nil, io.ErrUnexpectedEOF | |
824 | } | |
825 | b = b[n:] | |
826 | if x > uint64(len(b)) { | |
827 | return nil, io.ErrUnexpectedEOF | |
828 | } | |
829 | res := b[x:] | |
830 | b = b[:x] | |
831 | for len(b) > 0 { | |
832 | x, n = decodeVarint(b) | |
833 | if n == 0 { | |
834 | return nil, io.ErrUnexpectedEOF | |
835 | } | |
836 | b = b[n:] | |
837 | v := uint64(x) | |
838 | s := f.toUint64Slice() | |
839 | *s = append(*s, v) | |
840 | } | |
841 | return res, nil | |
842 | } | |
843 | if w != WireVarint { | |
844 | return b, errInternalBadWireType | |
845 | } | |
846 | x, n := decodeVarint(b) | |
847 | if n == 0 { | |
848 | return nil, io.ErrUnexpectedEOF | |
849 | } | |
850 | b = b[n:] | |
851 | v := uint64(x) | |
852 | s := f.toUint64Slice() | |
853 | *s = append(*s, v) | |
854 | return b, nil | |
855 | } | |
856 | ||
857 | func unmarshalInt32Value(b []byte, f pointer, w int) ([]byte, error) { | |
858 | if w != WireVarint { | |
859 | return b, errInternalBadWireType | |
860 | } | |
861 | x, n := decodeVarint(b) | |
862 | if n == 0 { | |
863 | return nil, io.ErrUnexpectedEOF | |
864 | } | |
865 | b = b[n:] | |
866 | v := int32(x) | |
867 | *f.toInt32() = v | |
868 | return b, nil | |
869 | } | |
870 | ||
871 | func unmarshalInt32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
872 | if w != WireVarint { | |
873 | return b, errInternalBadWireType | |
874 | } | |
875 | x, n := decodeVarint(b) | |
876 | if n == 0 { | |
877 | return nil, io.ErrUnexpectedEOF | |
878 | } | |
879 | b = b[n:] | |
880 | v := int32(x) | |
881 | f.setInt32Ptr(v) | |
882 | return b, nil | |
883 | } | |
884 | ||
885 | func unmarshalInt32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
886 | if w == WireBytes { // packed | |
887 | x, n := decodeVarint(b) | |
888 | if n == 0 { | |
889 | return nil, io.ErrUnexpectedEOF | |
890 | } | |
891 | b = b[n:] | |
892 | if x > uint64(len(b)) { | |
893 | return nil, io.ErrUnexpectedEOF | |
894 | } | |
895 | res := b[x:] | |
896 | b = b[:x] | |
897 | for len(b) > 0 { | |
898 | x, n = decodeVarint(b) | |
899 | if n == 0 { | |
900 | return nil, io.ErrUnexpectedEOF | |
901 | } | |
902 | b = b[n:] | |
903 | v := int32(x) | |
904 | f.appendInt32Slice(v) | |
905 | } | |
906 | return res, nil | |
907 | } | |
908 | if w != WireVarint { | |
909 | return b, errInternalBadWireType | |
910 | } | |
911 | x, n := decodeVarint(b) | |
912 | if n == 0 { | |
913 | return nil, io.ErrUnexpectedEOF | |
914 | } | |
915 | b = b[n:] | |
916 | v := int32(x) | |
917 | f.appendInt32Slice(v) | |
918 | return b, nil | |
919 | } | |
920 | ||
921 | func unmarshalSint32Value(b []byte, f pointer, w int) ([]byte, error) { | |
922 | if w != WireVarint { | |
923 | return b, errInternalBadWireType | |
924 | } | |
925 | x, n := decodeVarint(b) | |
926 | if n == 0 { | |
927 | return nil, io.ErrUnexpectedEOF | |
928 | } | |
929 | b = b[n:] | |
930 | v := int32(x>>1) ^ int32(x)<<31>>31 | |
931 | *f.toInt32() = v | |
932 | return b, nil | |
933 | } | |
934 | ||
935 | func unmarshalSint32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
936 | if w != WireVarint { | |
937 | return b, errInternalBadWireType | |
938 | } | |
939 | x, n := decodeVarint(b) | |
940 | if n == 0 { | |
941 | return nil, io.ErrUnexpectedEOF | |
942 | } | |
943 | b = b[n:] | |
944 | v := int32(x>>1) ^ int32(x)<<31>>31 | |
945 | f.setInt32Ptr(v) | |
946 | return b, nil | |
947 | } | |
948 | ||
949 | func unmarshalSint32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
950 | if w == WireBytes { // packed | |
951 | x, n := decodeVarint(b) | |
952 | if n == 0 { | |
953 | return nil, io.ErrUnexpectedEOF | |
954 | } | |
955 | b = b[n:] | |
956 | if x > uint64(len(b)) { | |
957 | return nil, io.ErrUnexpectedEOF | |
958 | } | |
959 | res := b[x:] | |
960 | b = b[:x] | |
961 | for len(b) > 0 { | |
962 | x, n = decodeVarint(b) | |
963 | if n == 0 { | |
964 | return nil, io.ErrUnexpectedEOF | |
965 | } | |
966 | b = b[n:] | |
967 | v := int32(x>>1) ^ int32(x)<<31>>31 | |
968 | f.appendInt32Slice(v) | |
969 | } | |
970 | return res, nil | |
971 | } | |
972 | if w != WireVarint { | |
973 | return b, errInternalBadWireType | |
974 | } | |
975 | x, n := decodeVarint(b) | |
976 | if n == 0 { | |
977 | return nil, io.ErrUnexpectedEOF | |
978 | } | |
979 | b = b[n:] | |
980 | v := int32(x>>1) ^ int32(x)<<31>>31 | |
981 | f.appendInt32Slice(v) | |
982 | return b, nil | |
983 | } | |
984 | ||
985 | func unmarshalUint32Value(b []byte, f pointer, w int) ([]byte, error) { | |
986 | if w != WireVarint { | |
987 | return b, errInternalBadWireType | |
988 | } | |
989 | x, n := decodeVarint(b) | |
990 | if n == 0 { | |
991 | return nil, io.ErrUnexpectedEOF | |
992 | } | |
993 | b = b[n:] | |
994 | v := uint32(x) | |
995 | *f.toUint32() = v | |
996 | return b, nil | |
997 | } | |
998 | ||
999 | func unmarshalUint32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1000 | if w != WireVarint { | |
1001 | return b, errInternalBadWireType | |
1002 | } | |
1003 | x, n := decodeVarint(b) | |
1004 | if n == 0 { | |
1005 | return nil, io.ErrUnexpectedEOF | |
1006 | } | |
1007 | b = b[n:] | |
1008 | v := uint32(x) | |
1009 | *f.toUint32Ptr() = &v | |
1010 | return b, nil | |
1011 | } | |
1012 | ||
1013 | func unmarshalUint32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1014 | if w == WireBytes { // packed | |
1015 | x, n := decodeVarint(b) | |
1016 | if n == 0 { | |
1017 | return nil, io.ErrUnexpectedEOF | |
1018 | } | |
1019 | b = b[n:] | |
1020 | if x > uint64(len(b)) { | |
1021 | return nil, io.ErrUnexpectedEOF | |
1022 | } | |
1023 | res := b[x:] | |
1024 | b = b[:x] | |
1025 | for len(b) > 0 { | |
1026 | x, n = decodeVarint(b) | |
1027 | if n == 0 { | |
1028 | return nil, io.ErrUnexpectedEOF | |
1029 | } | |
1030 | b = b[n:] | |
1031 | v := uint32(x) | |
1032 | s := f.toUint32Slice() | |
1033 | *s = append(*s, v) | |
1034 | } | |
1035 | return res, nil | |
1036 | } | |
1037 | if w != WireVarint { | |
1038 | return b, errInternalBadWireType | |
1039 | } | |
1040 | x, n := decodeVarint(b) | |
1041 | if n == 0 { | |
1042 | return nil, io.ErrUnexpectedEOF | |
1043 | } | |
1044 | b = b[n:] | |
1045 | v := uint32(x) | |
1046 | s := f.toUint32Slice() | |
1047 | *s = append(*s, v) | |
1048 | return b, nil | |
1049 | } | |
1050 | ||
1051 | func unmarshalFixed64Value(b []byte, f pointer, w int) ([]byte, error) { | |
1052 | if w != WireFixed64 { | |
1053 | return b, errInternalBadWireType | |
1054 | } | |
1055 | if len(b) < 8 { | |
1056 | return nil, io.ErrUnexpectedEOF | |
1057 | } | |
1058 | v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 | |
1059 | *f.toUint64() = v | |
1060 | return b[8:], nil | |
1061 | } | |
1062 | ||
1063 | func unmarshalFixed64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1064 | if w != WireFixed64 { | |
1065 | return b, errInternalBadWireType | |
1066 | } | |
1067 | if len(b) < 8 { | |
1068 | return nil, io.ErrUnexpectedEOF | |
1069 | } | |
1070 | v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 | |
1071 | *f.toUint64Ptr() = &v | |
1072 | return b[8:], nil | |
1073 | } | |
1074 | ||
1075 | func unmarshalFixed64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1076 | if w == WireBytes { // packed | |
1077 | x, n := decodeVarint(b) | |
1078 | if n == 0 { | |
1079 | return nil, io.ErrUnexpectedEOF | |
1080 | } | |
1081 | b = b[n:] | |
1082 | if x > uint64(len(b)) { | |
1083 | return nil, io.ErrUnexpectedEOF | |
1084 | } | |
1085 | res := b[x:] | |
1086 | b = b[:x] | |
1087 | for len(b) > 0 { | |
1088 | if len(b) < 8 { | |
1089 | return nil, io.ErrUnexpectedEOF | |
1090 | } | |
1091 | v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 | |
1092 | s := f.toUint64Slice() | |
1093 | *s = append(*s, v) | |
1094 | b = b[8:] | |
1095 | } | |
1096 | return res, nil | |
1097 | } | |
1098 | if w != WireFixed64 { | |
1099 | return b, errInternalBadWireType | |
1100 | } | |
1101 | if len(b) < 8 { | |
1102 | return nil, io.ErrUnexpectedEOF | |
1103 | } | |
1104 | v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 | |
1105 | s := f.toUint64Slice() | |
1106 | *s = append(*s, v) | |
1107 | return b[8:], nil | |
1108 | } | |
1109 | ||
1110 | func unmarshalFixedS64Value(b []byte, f pointer, w int) ([]byte, error) { | |
1111 | if w != WireFixed64 { | |
1112 | return b, errInternalBadWireType | |
1113 | } | |
1114 | if len(b) < 8 { | |
1115 | return nil, io.ErrUnexpectedEOF | |
1116 | } | |
1117 | v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 | |
1118 | *f.toInt64() = v | |
1119 | return b[8:], nil | |
1120 | } | |
1121 | ||
1122 | func unmarshalFixedS64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1123 | if w != WireFixed64 { | |
1124 | return b, errInternalBadWireType | |
1125 | } | |
1126 | if len(b) < 8 { | |
1127 | return nil, io.ErrUnexpectedEOF | |
1128 | } | |
1129 | v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 | |
1130 | *f.toInt64Ptr() = &v | |
1131 | return b[8:], nil | |
1132 | } | |
1133 | ||
1134 | func unmarshalFixedS64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1135 | if w == WireBytes { // packed | |
1136 | x, n := decodeVarint(b) | |
1137 | if n == 0 { | |
1138 | return nil, io.ErrUnexpectedEOF | |
1139 | } | |
1140 | b = b[n:] | |
1141 | if x > uint64(len(b)) { | |
1142 | return nil, io.ErrUnexpectedEOF | |
1143 | } | |
1144 | res := b[x:] | |
1145 | b = b[:x] | |
1146 | for len(b) > 0 { | |
1147 | if len(b) < 8 { | |
1148 | return nil, io.ErrUnexpectedEOF | |
1149 | } | |
1150 | v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 | |
1151 | s := f.toInt64Slice() | |
1152 | *s = append(*s, v) | |
1153 | b = b[8:] | |
1154 | } | |
1155 | return res, nil | |
1156 | } | |
1157 | if w != WireFixed64 { | |
1158 | return b, errInternalBadWireType | |
1159 | } | |
1160 | if len(b) < 8 { | |
1161 | return nil, io.ErrUnexpectedEOF | |
1162 | } | |
1163 | v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 | |
1164 | s := f.toInt64Slice() | |
1165 | *s = append(*s, v) | |
1166 | return b[8:], nil | |
1167 | } | |
1168 | ||
1169 | func unmarshalFixed32Value(b []byte, f pointer, w int) ([]byte, error) { | |
1170 | if w != WireFixed32 { | |
1171 | return b, errInternalBadWireType | |
1172 | } | |
1173 | if len(b) < 4 { | |
1174 | return nil, io.ErrUnexpectedEOF | |
1175 | } | |
1176 | v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | |
1177 | *f.toUint32() = v | |
1178 | return b[4:], nil | |
1179 | } | |
1180 | ||
1181 | func unmarshalFixed32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1182 | if w != WireFixed32 { | |
1183 | return b, errInternalBadWireType | |
1184 | } | |
1185 | if len(b) < 4 { | |
1186 | return nil, io.ErrUnexpectedEOF | |
1187 | } | |
1188 | v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | |
1189 | *f.toUint32Ptr() = &v | |
1190 | return b[4:], nil | |
1191 | } | |
1192 | ||
1193 | func unmarshalFixed32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1194 | if w == WireBytes { // packed | |
1195 | x, n := decodeVarint(b) | |
1196 | if n == 0 { | |
1197 | return nil, io.ErrUnexpectedEOF | |
1198 | } | |
1199 | b = b[n:] | |
1200 | if x > uint64(len(b)) { | |
1201 | return nil, io.ErrUnexpectedEOF | |
1202 | } | |
1203 | res := b[x:] | |
1204 | b = b[:x] | |
1205 | for len(b) > 0 { | |
1206 | if len(b) < 4 { | |
1207 | return nil, io.ErrUnexpectedEOF | |
1208 | } | |
1209 | v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | |
1210 | s := f.toUint32Slice() | |
1211 | *s = append(*s, v) | |
1212 | b = b[4:] | |
1213 | } | |
1214 | return res, nil | |
1215 | } | |
1216 | if w != WireFixed32 { | |
1217 | return b, errInternalBadWireType | |
1218 | } | |
1219 | if len(b) < 4 { | |
1220 | return nil, io.ErrUnexpectedEOF | |
1221 | } | |
1222 | v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | |
1223 | s := f.toUint32Slice() | |
1224 | *s = append(*s, v) | |
1225 | return b[4:], nil | |
1226 | } | |
1227 | ||
1228 | func unmarshalFixedS32Value(b []byte, f pointer, w int) ([]byte, error) { | |
1229 | if w != WireFixed32 { | |
1230 | return b, errInternalBadWireType | |
1231 | } | |
1232 | if len(b) < 4 { | |
1233 | return nil, io.ErrUnexpectedEOF | |
1234 | } | |
1235 | v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 | |
1236 | *f.toInt32() = v | |
1237 | return b[4:], nil | |
1238 | } | |
1239 | ||
1240 | func unmarshalFixedS32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1241 | if w != WireFixed32 { | |
1242 | return b, errInternalBadWireType | |
1243 | } | |
1244 | if len(b) < 4 { | |
1245 | return nil, io.ErrUnexpectedEOF | |
1246 | } | |
1247 | v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 | |
1248 | f.setInt32Ptr(v) | |
1249 | return b[4:], nil | |
1250 | } | |
1251 | ||
1252 | func unmarshalFixedS32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1253 | if w == WireBytes { // packed | |
1254 | x, n := decodeVarint(b) | |
1255 | if n == 0 { | |
1256 | return nil, io.ErrUnexpectedEOF | |
1257 | } | |
1258 | b = b[n:] | |
1259 | if x > uint64(len(b)) { | |
1260 | return nil, io.ErrUnexpectedEOF | |
1261 | } | |
1262 | res := b[x:] | |
1263 | b = b[:x] | |
1264 | for len(b) > 0 { | |
1265 | if len(b) < 4 { | |
1266 | return nil, io.ErrUnexpectedEOF | |
1267 | } | |
1268 | v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 | |
1269 | f.appendInt32Slice(v) | |
1270 | b = b[4:] | |
1271 | } | |
1272 | return res, nil | |
1273 | } | |
1274 | if w != WireFixed32 { | |
1275 | return b, errInternalBadWireType | |
1276 | } | |
1277 | if len(b) < 4 { | |
1278 | return nil, io.ErrUnexpectedEOF | |
1279 | } | |
1280 | v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 | |
1281 | f.appendInt32Slice(v) | |
1282 | return b[4:], nil | |
1283 | } | |
1284 | ||
1285 | func unmarshalBoolValue(b []byte, f pointer, w int) ([]byte, error) { | |
1286 | if w != WireVarint { | |
1287 | return b, errInternalBadWireType | |
1288 | } | |
1289 | // Note: any length varint is allowed, even though any sane | |
1290 | // encoder will use one byte. | |
1291 | // See https://github.com/golang/protobuf/issues/76 | |
1292 | x, n := decodeVarint(b) | |
1293 | if n == 0 { | |
1294 | return nil, io.ErrUnexpectedEOF | |
1295 | } | |
1296 | // TODO: check if x>1? Tests seem to indicate no. | |
1297 | v := x != 0 | |
1298 | *f.toBool() = v | |
1299 | return b[n:], nil | |
1300 | } | |
1301 | ||
1302 | func unmarshalBoolPtr(b []byte, f pointer, w int) ([]byte, error) { | |
1303 | if w != WireVarint { | |
1304 | return b, errInternalBadWireType | |
1305 | } | |
1306 | x, n := decodeVarint(b) | |
1307 | if n == 0 { | |
1308 | return nil, io.ErrUnexpectedEOF | |
1309 | } | |
1310 | v := x != 0 | |
1311 | *f.toBoolPtr() = &v | |
1312 | return b[n:], nil | |
1313 | } | |
1314 | ||
1315 | func unmarshalBoolSlice(b []byte, f pointer, w int) ([]byte, error) { | |
1316 | if w == WireBytes { // packed | |
1317 | x, n := decodeVarint(b) | |
1318 | if n == 0 { | |
1319 | return nil, io.ErrUnexpectedEOF | |
1320 | } | |
1321 | b = b[n:] | |
1322 | if x > uint64(len(b)) { | |
1323 | return nil, io.ErrUnexpectedEOF | |
1324 | } | |
1325 | res := b[x:] | |
1326 | b = b[:x] | |
1327 | for len(b) > 0 { | |
1328 | x, n = decodeVarint(b) | |
1329 | if n == 0 { | |
1330 | return nil, io.ErrUnexpectedEOF | |
1331 | } | |
1332 | v := x != 0 | |
1333 | s := f.toBoolSlice() | |
1334 | *s = append(*s, v) | |
1335 | b = b[n:] | |
1336 | } | |
1337 | return res, nil | |
1338 | } | |
1339 | if w != WireVarint { | |
1340 | return b, errInternalBadWireType | |
1341 | } | |
1342 | x, n := decodeVarint(b) | |
1343 | if n == 0 { | |
1344 | return nil, io.ErrUnexpectedEOF | |
1345 | } | |
1346 | v := x != 0 | |
1347 | s := f.toBoolSlice() | |
1348 | *s = append(*s, v) | |
1349 | return b[n:], nil | |
1350 | } | |
1351 | ||
1352 | func unmarshalFloat64Value(b []byte, f pointer, w int) ([]byte, error) { | |
1353 | if w != WireFixed64 { | |
1354 | return b, errInternalBadWireType | |
1355 | } | |
1356 | if len(b) < 8 { | |
1357 | return nil, io.ErrUnexpectedEOF | |
1358 | } | |
1359 | v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) | |
1360 | *f.toFloat64() = v | |
1361 | return b[8:], nil | |
1362 | } | |
1363 | ||
1364 | func unmarshalFloat64Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1365 | if w != WireFixed64 { | |
1366 | return b, errInternalBadWireType | |
1367 | } | |
1368 | if len(b) < 8 { | |
1369 | return nil, io.ErrUnexpectedEOF | |
1370 | } | |
1371 | v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) | |
1372 | *f.toFloat64Ptr() = &v | |
1373 | return b[8:], nil | |
1374 | } | |
1375 | ||
1376 | func unmarshalFloat64Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1377 | if w == WireBytes { // packed | |
1378 | x, n := decodeVarint(b) | |
1379 | if n == 0 { | |
1380 | return nil, io.ErrUnexpectedEOF | |
1381 | } | |
1382 | b = b[n:] | |
1383 | if x > uint64(len(b)) { | |
1384 | return nil, io.ErrUnexpectedEOF | |
1385 | } | |
1386 | res := b[x:] | |
1387 | b = b[:x] | |
1388 | for len(b) > 0 { | |
1389 | if len(b) < 8 { | |
1390 | return nil, io.ErrUnexpectedEOF | |
1391 | } | |
1392 | v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) | |
1393 | s := f.toFloat64Slice() | |
1394 | *s = append(*s, v) | |
1395 | b = b[8:] | |
1396 | } | |
1397 | return res, nil | |
1398 | } | |
1399 | if w != WireFixed64 { | |
1400 | return b, errInternalBadWireType | |
1401 | } | |
1402 | if len(b) < 8 { | |
1403 | return nil, io.ErrUnexpectedEOF | |
1404 | } | |
1405 | v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) | |
1406 | s := f.toFloat64Slice() | |
1407 | *s = append(*s, v) | |
1408 | return b[8:], nil | |
1409 | } | |
1410 | ||
1411 | func unmarshalFloat32Value(b []byte, f pointer, w int) ([]byte, error) { | |
1412 | if w != WireFixed32 { | |
1413 | return b, errInternalBadWireType | |
1414 | } | |
1415 | if len(b) < 4 { | |
1416 | return nil, io.ErrUnexpectedEOF | |
1417 | } | |
1418 | v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) | |
1419 | *f.toFloat32() = v | |
1420 | return b[4:], nil | |
1421 | } | |
1422 | ||
1423 | func unmarshalFloat32Ptr(b []byte, f pointer, w int) ([]byte, error) { | |
1424 | if w != WireFixed32 { | |
1425 | return b, errInternalBadWireType | |
1426 | } | |
1427 | if len(b) < 4 { | |
1428 | return nil, io.ErrUnexpectedEOF | |
1429 | } | |
1430 | v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) | |
1431 | *f.toFloat32Ptr() = &v | |
1432 | return b[4:], nil | |
1433 | } | |
1434 | ||
1435 | func unmarshalFloat32Slice(b []byte, f pointer, w int) ([]byte, error) { | |
1436 | if w == WireBytes { // packed | |
1437 | x, n := decodeVarint(b) | |
1438 | if n == 0 { | |
1439 | return nil, io.ErrUnexpectedEOF | |
1440 | } | |
1441 | b = b[n:] | |
1442 | if x > uint64(len(b)) { | |
1443 | return nil, io.ErrUnexpectedEOF | |
1444 | } | |
1445 | res := b[x:] | |
1446 | b = b[:x] | |
1447 | for len(b) > 0 { | |
1448 | if len(b) < 4 { | |
1449 | return nil, io.ErrUnexpectedEOF | |
1450 | } | |
1451 | v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) | |
1452 | s := f.toFloat32Slice() | |
1453 | *s = append(*s, v) | |
1454 | b = b[4:] | |
1455 | } | |
1456 | return res, nil | |
1457 | } | |
1458 | if w != WireFixed32 { | |
1459 | return b, errInternalBadWireType | |
1460 | } | |
1461 | if len(b) < 4 { | |
1462 | return nil, io.ErrUnexpectedEOF | |
1463 | } | |
1464 | v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) | |
1465 | s := f.toFloat32Slice() | |
1466 | *s = append(*s, v) | |
1467 | return b[4:], nil | |
1468 | } | |
1469 | ||
1470 | func unmarshalStringValue(b []byte, f pointer, w int) ([]byte, error) { | |
1471 | if w != WireBytes { | |
1472 | return b, errInternalBadWireType | |
1473 | } | |
1474 | x, n := decodeVarint(b) | |
1475 | if n == 0 { | |
1476 | return nil, io.ErrUnexpectedEOF | |
1477 | } | |
1478 | b = b[n:] | |
1479 | if x > uint64(len(b)) { | |
1480 | return nil, io.ErrUnexpectedEOF | |
1481 | } | |
1482 | v := string(b[:x]) | |
1483 | *f.toString() = v | |
1484 | return b[x:], nil | |
1485 | } | |
1486 | ||
1487 | func unmarshalStringPtr(b []byte, f pointer, w int) ([]byte, error) { | |
1488 | if w != WireBytes { | |
1489 | return b, errInternalBadWireType | |
1490 | } | |
1491 | x, n := decodeVarint(b) | |
1492 | if n == 0 { | |
1493 | return nil, io.ErrUnexpectedEOF | |
1494 | } | |
1495 | b = b[n:] | |
1496 | if x > uint64(len(b)) { | |
1497 | return nil, io.ErrUnexpectedEOF | |
1498 | } | |
1499 | v := string(b[:x]) | |
1500 | *f.toStringPtr() = &v | |
1501 | return b[x:], nil | |
1502 | } | |
1503 | ||
1504 | func unmarshalStringSlice(b []byte, f pointer, w int) ([]byte, error) { | |
1505 | if w != WireBytes { | |
1506 | return b, errInternalBadWireType | |
1507 | } | |
1508 | x, n := decodeVarint(b) | |
1509 | if n == 0 { | |
1510 | return nil, io.ErrUnexpectedEOF | |
1511 | } | |
1512 | b = b[n:] | |
1513 | if x > uint64(len(b)) { | |
1514 | return nil, io.ErrUnexpectedEOF | |
1515 | } | |
1516 | v := string(b[:x]) | |
1517 | s := f.toStringSlice() | |
1518 | *s = append(*s, v) | |
1519 | return b[x:], nil | |
1520 | } | |
1521 | ||
1522 | func unmarshalUTF8StringValue(b []byte, f pointer, w int) ([]byte, error) { | |
1523 | if w != WireBytes { | |
1524 | return b, errInternalBadWireType | |
1525 | } | |
1526 | x, n := decodeVarint(b) | |
1527 | if n == 0 { | |
1528 | return nil, io.ErrUnexpectedEOF | |
1529 | } | |
1530 | b = b[n:] | |
1531 | if x > uint64(len(b)) { | |
1532 | return nil, io.ErrUnexpectedEOF | |
1533 | } | |
1534 | v := string(b[:x]) | |
1535 | *f.toString() = v | |
1536 | if !utf8.ValidString(v) { | |
1537 | return b[x:], errInvalidUTF8 | |
1538 | } | |
1539 | return b[x:], nil | |
1540 | } | |
1541 | ||
1542 | func unmarshalUTF8StringPtr(b []byte, f pointer, w int) ([]byte, error) { | |
1543 | if w != WireBytes { | |
1544 | return b, errInternalBadWireType | |
1545 | } | |
1546 | x, n := decodeVarint(b) | |
1547 | if n == 0 { | |
1548 | return nil, io.ErrUnexpectedEOF | |
1549 | } | |
1550 | b = b[n:] | |
1551 | if x > uint64(len(b)) { | |
1552 | return nil, io.ErrUnexpectedEOF | |
1553 | } | |
1554 | v := string(b[:x]) | |
1555 | *f.toStringPtr() = &v | |
1556 | if !utf8.ValidString(v) { | |
1557 | return b[x:], errInvalidUTF8 | |
1558 | } | |
1559 | return b[x:], nil | |
1560 | } | |
1561 | ||
1562 | func unmarshalUTF8StringSlice(b []byte, f pointer, w int) ([]byte, error) { | |
1563 | if w != WireBytes { | |
1564 | return b, errInternalBadWireType | |
1565 | } | |
1566 | x, n := decodeVarint(b) | |
1567 | if n == 0 { | |
1568 | return nil, io.ErrUnexpectedEOF | |
1569 | } | |
1570 | b = b[n:] | |
1571 | if x > uint64(len(b)) { | |
1572 | return nil, io.ErrUnexpectedEOF | |
1573 | } | |
1574 | v := string(b[:x]) | |
1575 | s := f.toStringSlice() | |
1576 | *s = append(*s, v) | |
1577 | if !utf8.ValidString(v) { | |
1578 | return b[x:], errInvalidUTF8 | |
1579 | } | |
1580 | return b[x:], nil | |
1581 | } | |
1582 | ||
1583 | var emptyBuf [0]byte | |
1584 | ||
1585 | func unmarshalBytesValue(b []byte, f pointer, w int) ([]byte, error) { | |
1586 | if w != WireBytes { | |
1587 | return b, errInternalBadWireType | |
1588 | } | |
1589 | x, n := decodeVarint(b) | |
1590 | if n == 0 { | |
1591 | return nil, io.ErrUnexpectedEOF | |
1592 | } | |
1593 | b = b[n:] | |
1594 | if x > uint64(len(b)) { | |
1595 | return nil, io.ErrUnexpectedEOF | |
1596 | } | |
1597 | // The use of append here is a trick which avoids the zeroing | |
1598 | // that would be required if we used a make/copy pair. | |
1599 | // We append to emptyBuf instead of nil because we want | |
1600 | // a non-nil result even when the length is 0. | |
1601 | v := append(emptyBuf[:], b[:x]...) | |
1602 | *f.toBytes() = v | |
1603 | return b[x:], nil | |
1604 | } | |
1605 | ||
1606 | func unmarshalBytesSlice(b []byte, f pointer, w int) ([]byte, error) { | |
1607 | if w != WireBytes { | |
1608 | return b, errInternalBadWireType | |
1609 | } | |
1610 | x, n := decodeVarint(b) | |
1611 | if n == 0 { | |
1612 | return nil, io.ErrUnexpectedEOF | |
1613 | } | |
1614 | b = b[n:] | |
1615 | if x > uint64(len(b)) { | |
1616 | return nil, io.ErrUnexpectedEOF | |
1617 | } | |
1618 | v := append(emptyBuf[:], b[:x]...) | |
1619 | s := f.toBytesSlice() | |
1620 | *s = append(*s, v) | |
1621 | return b[x:], nil | |
1622 | } | |
1623 | ||
1624 | func makeUnmarshalMessagePtr(sub *unmarshalInfo, name string) unmarshaler { | |
1625 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1626 | if w != WireBytes { | |
1627 | return b, errInternalBadWireType | |
1628 | } | |
1629 | x, n := decodeVarint(b) | |
1630 | if n == 0 { | |
1631 | return nil, io.ErrUnexpectedEOF | |
1632 | } | |
1633 | b = b[n:] | |
1634 | if x > uint64(len(b)) { | |
1635 | return nil, io.ErrUnexpectedEOF | |
1636 | } | |
1637 | // First read the message field to see if something is there. | |
1638 | // The semantics of multiple submessages are weird. Instead of | |
1639 | // the last one winning (as it is for all other fields), multiple | |
1640 | // submessages are merged. | |
1641 | v := f.getPointer() | |
1642 | if v.isNil() { | |
1643 | v = valToPointer(reflect.New(sub.typ)) | |
1644 | f.setPointer(v) | |
1645 | } | |
1646 | err := sub.unmarshal(v, b[:x]) | |
1647 | if err != nil { | |
1648 | if r, ok := err.(*RequiredNotSetError); ok { | |
1649 | r.field = name + "." + r.field | |
1650 | } else { | |
1651 | return nil, err | |
1652 | } | |
1653 | } | |
1654 | return b[x:], err | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | func makeUnmarshalMessageSlicePtr(sub *unmarshalInfo, name string) unmarshaler { | |
1659 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1660 | if w != WireBytes { | |
1661 | return b, errInternalBadWireType | |
1662 | } | |
1663 | x, n := decodeVarint(b) | |
1664 | if n == 0 { | |
1665 | return nil, io.ErrUnexpectedEOF | |
1666 | } | |
1667 | b = b[n:] | |
1668 | if x > uint64(len(b)) { | |
1669 | return nil, io.ErrUnexpectedEOF | |
1670 | } | |
1671 | v := valToPointer(reflect.New(sub.typ)) | |
1672 | err := sub.unmarshal(v, b[:x]) | |
1673 | if err != nil { | |
1674 | if r, ok := err.(*RequiredNotSetError); ok { | |
1675 | r.field = name + "." + r.field | |
1676 | } else { | |
1677 | return nil, err | |
1678 | } | |
1679 | } | |
1680 | f.appendPointer(v) | |
1681 | return b[x:], err | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | func makeUnmarshalGroupPtr(sub *unmarshalInfo, name string) unmarshaler { | |
1686 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1687 | if w != WireStartGroup { | |
1688 | return b, errInternalBadWireType | |
1689 | } | |
1690 | x, y := findEndGroup(b) | |
1691 | if x < 0 { | |
1692 | return nil, io.ErrUnexpectedEOF | |
1693 | } | |
1694 | v := f.getPointer() | |
1695 | if v.isNil() { | |
1696 | v = valToPointer(reflect.New(sub.typ)) | |
1697 | f.setPointer(v) | |
1698 | } | |
1699 | err := sub.unmarshal(v, b[:x]) | |
1700 | if err != nil { | |
1701 | if r, ok := err.(*RequiredNotSetError); ok { | |
1702 | r.field = name + "." + r.field | |
1703 | } else { | |
1704 | return nil, err | |
1705 | } | |
1706 | } | |
1707 | return b[y:], err | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | func makeUnmarshalGroupSlicePtr(sub *unmarshalInfo, name string) unmarshaler { | |
1712 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1713 | if w != WireStartGroup { | |
1714 | return b, errInternalBadWireType | |
1715 | } | |
1716 | x, y := findEndGroup(b) | |
1717 | if x < 0 { | |
1718 | return nil, io.ErrUnexpectedEOF | |
1719 | } | |
1720 | v := valToPointer(reflect.New(sub.typ)) | |
1721 | err := sub.unmarshal(v, b[:x]) | |
1722 | if err != nil { | |
1723 | if r, ok := err.(*RequiredNotSetError); ok { | |
1724 | r.field = name + "." + r.field | |
1725 | } else { | |
1726 | return nil, err | |
1727 | } | |
1728 | } | |
1729 | f.appendPointer(v) | |
1730 | return b[y:], err | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | func makeUnmarshalMap(f *reflect.StructField) unmarshaler { | |
1735 | t := f.Type | |
1736 | kt := t.Key() | |
1737 | vt := t.Elem() | |
1738 | unmarshalKey := typeUnmarshaler(kt, f.Tag.Get("protobuf_key")) | |
1739 | unmarshalVal := typeUnmarshaler(vt, f.Tag.Get("protobuf_val")) | |
1740 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1741 | // The map entry is a submessage. Figure out how big it is. | |
1742 | if w != WireBytes { | |
1743 | return nil, fmt.Errorf("proto: bad wiretype for map field: got %d want %d", w, WireBytes) | |
1744 | } | |
1745 | x, n := decodeVarint(b) | |
1746 | if n == 0 { | |
1747 | return nil, io.ErrUnexpectedEOF | |
1748 | } | |
1749 | b = b[n:] | |
1750 | if x > uint64(len(b)) { | |
1751 | return nil, io.ErrUnexpectedEOF | |
1752 | } | |
1753 | r := b[x:] // unused data to return | |
1754 | b = b[:x] // data for map entry | |
1755 | ||
1756 | // Note: we could use #keys * #values ~= 200 functions | |
1757 | // to do map decoding without reflection. Probably not worth it. | |
1758 | // Maps will be somewhat slow. Oh well. | |
1759 | ||
1760 | // Read key and value from data. | |
1761 | var nerr nonFatal | |
1762 | k := reflect.New(kt) | |
1763 | v := reflect.New(vt) | |
1764 | for len(b) > 0 { | |
1765 | x, n := decodeVarint(b) | |
1766 | if n == 0 { | |
1767 | return nil, io.ErrUnexpectedEOF | |
1768 | } | |
1769 | wire := int(x) & 7 | |
1770 | b = b[n:] | |
1771 | ||
1772 | var err error | |
1773 | switch x >> 3 { | |
1774 | case 1: | |
1775 | b, err = unmarshalKey(b, valToPointer(k), wire) | |
1776 | case 2: | |
1777 | b, err = unmarshalVal(b, valToPointer(v), wire) | |
1778 | default: | |
1779 | err = errInternalBadWireType // skip unknown tag | |
1780 | } | |
1781 | ||
1782 | if nerr.Merge(err) { | |
1783 | continue | |
1784 | } | |
1785 | if err != errInternalBadWireType { | |
1786 | return nil, err | |
1787 | } | |
1788 | ||
1789 | // Skip past unknown fields. | |
1790 | b, err = skipField(b, wire) | |
1791 | if err != nil { | |
1792 | return nil, err | |
1793 | } | |
1794 | } | |
1795 | ||
1796 | // Get map, allocate if needed. | |
1797 | m := f.asPointerTo(t).Elem() // an addressable map[K]T | |
1798 | if m.IsNil() { | |
1799 | m.Set(reflect.MakeMap(t)) | |
1800 | } | |
1801 | ||
1802 | // Insert into map. | |
1803 | m.SetMapIndex(k.Elem(), v.Elem()) | |
1804 | ||
1805 | return r, nerr.E | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | // makeUnmarshalOneof makes an unmarshaler for oneof fields. | |
1810 | // for: | |
1811 | // message Msg { | |
1812 | // oneof F { | |
1813 | // int64 X = 1; | |
1814 | // float64 Y = 2; | |
1815 | // } | |
1816 | // } | |
1817 | // typ is the type of the concrete entry for a oneof case (e.g. Msg_X). | |
1818 | // ityp is the interface type of the oneof field (e.g. isMsg_F). | |
1819 | // unmarshal is the unmarshaler for the base type of the oneof case (e.g. int64). | |
1820 | // Note that this function will be called once for each case in the oneof. | |
1821 | func makeUnmarshalOneof(typ, ityp reflect.Type, unmarshal unmarshaler) unmarshaler { | |
1822 | sf := typ.Field(0) | |
1823 | field0 := toField(&sf) | |
1824 | return func(b []byte, f pointer, w int) ([]byte, error) { | |
1825 | // Allocate holder for value. | |
1826 | v := reflect.New(typ) | |
1827 | ||
1828 | // Unmarshal data into holder. | |
1829 | // We unmarshal into the first field of the holder object. | |
1830 | var err error | |
1831 | var nerr nonFatal | |
1832 | b, err = unmarshal(b, valToPointer(v).offset(field0), w) | |
1833 | if !nerr.Merge(err) { | |
1834 | return nil, err | |
1835 | } | |
1836 | ||
1837 | // Write pointer to holder into target field. | |
1838 | f.asPointerTo(ityp).Elem().Set(v) | |
1839 | ||
1840 | return b, nerr.E | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | // Error used by decode internally. | |
1845 | var errInternalBadWireType = errors.New("proto: internal error: bad wiretype") | |
1846 | ||
1847 | // skipField skips past a field of type wire and returns the remaining bytes. | |
1848 | func skipField(b []byte, wire int) ([]byte, error) { | |
1849 | switch wire { | |
1850 | case WireVarint: | |
1851 | _, k := decodeVarint(b) | |
1852 | if k == 0 { | |
1853 | return b, io.ErrUnexpectedEOF | |
1854 | } | |
1855 | b = b[k:] | |
1856 | case WireFixed32: | |
1857 | if len(b) < 4 { | |
1858 | return b, io.ErrUnexpectedEOF | |
1859 | } | |
1860 | b = b[4:] | |
1861 | case WireFixed64: | |
1862 | if len(b) < 8 { | |
1863 | return b, io.ErrUnexpectedEOF | |
1864 | } | |
1865 | b = b[8:] | |
1866 | case WireBytes: | |
1867 | m, k := decodeVarint(b) | |
1868 | if k == 0 || uint64(len(b)-k) < m { | |
1869 | return b, io.ErrUnexpectedEOF | |
1870 | } | |
1871 | b = b[uint64(k)+m:] | |
1872 | case WireStartGroup: | |
1873 | _, i := findEndGroup(b) | |
1874 | if i == -1 { | |
1875 | return b, io.ErrUnexpectedEOF | |
1876 | } | |
1877 | b = b[i:] | |
1878 | default: | |
1879 | return b, fmt.Errorf("proto: can't skip unknown wire type %d", wire) | |
1880 | } | |
1881 | return b, nil | |
1882 | } | |
1883 | ||
1884 | // findEndGroup finds the index of the next EndGroup tag. | |
1885 | // Groups may be nested, so the "next" EndGroup tag is the first | |
1886 | // unpaired EndGroup. | |
1887 | // findEndGroup returns the indexes of the start and end of the EndGroup tag. | |
1888 | // Returns (-1,-1) if it can't find one. | |
1889 | func findEndGroup(b []byte) (int, int) { | |
1890 | depth := 1 | |
1891 | i := 0 | |
1892 | for { | |
1893 | x, n := decodeVarint(b[i:]) | |
1894 | if n == 0 { | |
1895 | return -1, -1 | |
1896 | } | |
1897 | j := i | |
1898 | i += n | |
1899 | switch x & 7 { | |
1900 | case WireVarint: | |
1901 | _, k := decodeVarint(b[i:]) | |
1902 | if k == 0 { | |
1903 | return -1, -1 | |
1904 | } | |
1905 | i += k | |
1906 | case WireFixed32: | |
1907 | if len(b)-4 < i { | |
1908 | return -1, -1 | |
1909 | } | |
1910 | i += 4 | |
1911 | case WireFixed64: | |
1912 | if len(b)-8 < i { | |
1913 | return -1, -1 | |
1914 | } | |
1915 | i += 8 | |
1916 | case WireBytes: | |
1917 | m, k := decodeVarint(b[i:]) | |
1918 | if k == 0 { | |
1919 | return -1, -1 | |
1920 | } | |
1921 | i += k | |
1922 | if uint64(len(b)-i) < m { | |
1923 | return -1, -1 | |
1924 | } | |
1925 | i += int(m) | |
1926 | case WireStartGroup: | |
1927 | depth++ | |
1928 | case WireEndGroup: | |
1929 | depth-- | |
1930 | if depth == 0 { | |
1931 | return j, i | |
1932 | } | |
1933 | default: | |
1934 | return -1, -1 | |
1935 | } | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | // encodeVarint appends a varint-encoded integer to b and returns the result. | |
1940 | func encodeVarint(b []byte, x uint64) []byte { | |
1941 | for x >= 1<<7 { | |
1942 | b = append(b, byte(x&0x7f|0x80)) | |
1943 | x >>= 7 | |
1944 | } | |
1945 | return append(b, byte(x)) | |
1946 | } | |
1947 | ||
1948 | // decodeVarint reads a varint-encoded integer from b. | |
1949 | // Returns the decoded integer and the number of bytes read. | |
1950 | // If there is an error, it returns 0,0. | |
1951 | func decodeVarint(b []byte) (uint64, int) { | |
1952 | var x, y uint64 | |
107c1cdb | 1953 | if len(b) == 0 { |
15c0b25d AP |
1954 | goto bad |
1955 | } | |
1956 | x = uint64(b[0]) | |
1957 | if x < 0x80 { | |
1958 | return x, 1 | |
1959 | } | |
1960 | x -= 0x80 | |
1961 | ||
1962 | if len(b) <= 1 { | |
1963 | goto bad | |
1964 | } | |
1965 | y = uint64(b[1]) | |
1966 | x += y << 7 | |
1967 | if y < 0x80 { | |
1968 | return x, 2 | |
1969 | } | |
1970 | x -= 0x80 << 7 | |
1971 | ||
1972 | if len(b) <= 2 { | |
1973 | goto bad | |
1974 | } | |
1975 | y = uint64(b[2]) | |
1976 | x += y << 14 | |
1977 | if y < 0x80 { | |
1978 | return x, 3 | |
1979 | } | |
1980 | x -= 0x80 << 14 | |
1981 | ||
1982 | if len(b) <= 3 { | |
1983 | goto bad | |
1984 | } | |
1985 | y = uint64(b[3]) | |
1986 | x += y << 21 | |
1987 | if y < 0x80 { | |
1988 | return x, 4 | |
1989 | } | |
1990 | x -= 0x80 << 21 | |
1991 | ||
1992 | if len(b) <= 4 { | |
1993 | goto bad | |
1994 | } | |
1995 | y = uint64(b[4]) | |
1996 | x += y << 28 | |
1997 | if y < 0x80 { | |
1998 | return x, 5 | |
1999 | } | |
2000 | x -= 0x80 << 28 | |
2001 | ||
2002 | if len(b) <= 5 { | |
2003 | goto bad | |
2004 | } | |
2005 | y = uint64(b[5]) | |
2006 | x += y << 35 | |
2007 | if y < 0x80 { | |
2008 | return x, 6 | |
2009 | } | |
2010 | x -= 0x80 << 35 | |
2011 | ||
2012 | if len(b) <= 6 { | |
2013 | goto bad | |
2014 | } | |
2015 | y = uint64(b[6]) | |
2016 | x += y << 42 | |
2017 | if y < 0x80 { | |
2018 | return x, 7 | |
2019 | } | |
2020 | x -= 0x80 << 42 | |
2021 | ||
2022 | if len(b) <= 7 { | |
2023 | goto bad | |
2024 | } | |
2025 | y = uint64(b[7]) | |
2026 | x += y << 49 | |
2027 | if y < 0x80 { | |
2028 | return x, 8 | |
2029 | } | |
2030 | x -= 0x80 << 49 | |
2031 | ||
2032 | if len(b) <= 8 { | |
2033 | goto bad | |
2034 | } | |
2035 | y = uint64(b[8]) | |
2036 | x += y << 56 | |
2037 | if y < 0x80 { | |
2038 | return x, 9 | |
2039 | } | |
2040 | x -= 0x80 << 56 | |
2041 | ||
2042 | if len(b) <= 9 { | |
2043 | goto bad | |
2044 | } | |
2045 | y = uint64(b[9]) | |
2046 | x += y << 63 | |
2047 | if y < 2 { | |
2048 | return x, 10 | |
2049 | } | |
2050 | ||
2051 | bad: | |
2052 | return 0, 0 | |
2053 | } |