Holger Hildebrandt | fa07499 | 2020-03-27 15:42:06 +0000 | [diff] [blame^] | 1 | // Protocol Buffers for Go with Gadgets |
| 2 | // |
| 3 | // Copyright (c) 2013, The GoGo Authors. All rights reserved. |
| 4 | // http://github.com/gogo/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 | // |
| 17 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 20 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 21 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 23 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 27 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | |
| 29 | package descriptor |
| 30 | |
| 31 | import ( |
| 32 | "strings" |
| 33 | ) |
| 34 | |
| 35 | func (msg *DescriptorProto) GetMapFields() (*FieldDescriptorProto, *FieldDescriptorProto) { |
| 36 | if !msg.GetOptions().GetMapEntry() { |
| 37 | return nil, nil |
| 38 | } |
| 39 | return msg.GetField()[0], msg.GetField()[1] |
| 40 | } |
| 41 | |
| 42 | func dotToUnderscore(r rune) rune { |
| 43 | if r == '.' { |
| 44 | return '_' |
| 45 | } |
| 46 | return r |
| 47 | } |
| 48 | |
| 49 | func (field *FieldDescriptorProto) WireType() (wire int) { |
| 50 | switch *field.Type { |
| 51 | case FieldDescriptorProto_TYPE_DOUBLE: |
| 52 | return 1 |
| 53 | case FieldDescriptorProto_TYPE_FLOAT: |
| 54 | return 5 |
| 55 | case FieldDescriptorProto_TYPE_INT64: |
| 56 | return 0 |
| 57 | case FieldDescriptorProto_TYPE_UINT64: |
| 58 | return 0 |
| 59 | case FieldDescriptorProto_TYPE_INT32: |
| 60 | return 0 |
| 61 | case FieldDescriptorProto_TYPE_UINT32: |
| 62 | return 0 |
| 63 | case FieldDescriptorProto_TYPE_FIXED64: |
| 64 | return 1 |
| 65 | case FieldDescriptorProto_TYPE_FIXED32: |
| 66 | return 5 |
| 67 | case FieldDescriptorProto_TYPE_BOOL: |
| 68 | return 0 |
| 69 | case FieldDescriptorProto_TYPE_STRING: |
| 70 | return 2 |
| 71 | case FieldDescriptorProto_TYPE_GROUP: |
| 72 | return 2 |
| 73 | case FieldDescriptorProto_TYPE_MESSAGE: |
| 74 | return 2 |
| 75 | case FieldDescriptorProto_TYPE_BYTES: |
| 76 | return 2 |
| 77 | case FieldDescriptorProto_TYPE_ENUM: |
| 78 | return 0 |
| 79 | case FieldDescriptorProto_TYPE_SFIXED32: |
| 80 | return 5 |
| 81 | case FieldDescriptorProto_TYPE_SFIXED64: |
| 82 | return 1 |
| 83 | case FieldDescriptorProto_TYPE_SINT32: |
| 84 | return 0 |
| 85 | case FieldDescriptorProto_TYPE_SINT64: |
| 86 | return 0 |
| 87 | } |
| 88 | panic("unreachable") |
| 89 | } |
| 90 | |
| 91 | func (field *FieldDescriptorProto) GetKeyUint64() (x uint64) { |
| 92 | packed := field.IsPacked() |
| 93 | wireType := field.WireType() |
| 94 | fieldNumber := field.GetNumber() |
| 95 | if packed { |
| 96 | wireType = 2 |
| 97 | } |
| 98 | x = uint64(uint32(fieldNumber)<<3 | uint32(wireType)) |
| 99 | return x |
| 100 | } |
| 101 | |
| 102 | func (field *FieldDescriptorProto) GetKey3Uint64() (x uint64) { |
| 103 | packed := field.IsPacked3() |
| 104 | wireType := field.WireType() |
| 105 | fieldNumber := field.GetNumber() |
| 106 | if packed { |
| 107 | wireType = 2 |
| 108 | } |
| 109 | x = uint64(uint32(fieldNumber)<<3 | uint32(wireType)) |
| 110 | return x |
| 111 | } |
| 112 | |
| 113 | func (field *FieldDescriptorProto) GetKey() []byte { |
| 114 | x := field.GetKeyUint64() |
| 115 | i := 0 |
| 116 | keybuf := make([]byte, 0) |
| 117 | for i = 0; x > 127; i++ { |
| 118 | keybuf = append(keybuf, 0x80|uint8(x&0x7F)) |
| 119 | x >>= 7 |
| 120 | } |
| 121 | keybuf = append(keybuf, uint8(x)) |
| 122 | return keybuf |
| 123 | } |
| 124 | |
| 125 | func (field *FieldDescriptorProto) GetKey3() []byte { |
| 126 | x := field.GetKey3Uint64() |
| 127 | i := 0 |
| 128 | keybuf := make([]byte, 0) |
| 129 | for i = 0; x > 127; i++ { |
| 130 | keybuf = append(keybuf, 0x80|uint8(x&0x7F)) |
| 131 | x >>= 7 |
| 132 | } |
| 133 | keybuf = append(keybuf, uint8(x)) |
| 134 | return keybuf |
| 135 | } |
| 136 | |
| 137 | func (desc *FileDescriptorSet) GetField(packageName, messageName, fieldName string) *FieldDescriptorProto { |
| 138 | msg := desc.GetMessage(packageName, messageName) |
| 139 | if msg == nil { |
| 140 | return nil |
| 141 | } |
| 142 | for _, field := range msg.GetField() { |
| 143 | if field.GetName() == fieldName { |
| 144 | return field |
| 145 | } |
| 146 | } |
| 147 | return nil |
| 148 | } |
| 149 | |
| 150 | func (file *FileDescriptorProto) GetMessage(typeName string) *DescriptorProto { |
| 151 | for _, msg := range file.GetMessageType() { |
| 152 | if msg.GetName() == typeName { |
| 153 | return msg |
| 154 | } |
| 155 | nes := file.GetNestedMessage(msg, strings.TrimPrefix(typeName, msg.GetName()+".")) |
| 156 | if nes != nil { |
| 157 | return nes |
| 158 | } |
| 159 | } |
| 160 | return nil |
| 161 | } |
| 162 | |
| 163 | func (file *FileDescriptorProto) GetNestedMessage(msg *DescriptorProto, typeName string) *DescriptorProto { |
| 164 | for _, nes := range msg.GetNestedType() { |
| 165 | if nes.GetName() == typeName { |
| 166 | return nes |
| 167 | } |
| 168 | res := file.GetNestedMessage(nes, strings.TrimPrefix(typeName, nes.GetName()+".")) |
| 169 | if res != nil { |
| 170 | return res |
| 171 | } |
| 172 | } |
| 173 | return nil |
| 174 | } |
| 175 | |
| 176 | func (desc *FileDescriptorSet) GetMessage(packageName string, typeName string) *DescriptorProto { |
| 177 | for _, file := range desc.GetFile() { |
| 178 | if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) { |
| 179 | continue |
| 180 | } |
| 181 | for _, msg := range file.GetMessageType() { |
| 182 | if msg.GetName() == typeName { |
| 183 | return msg |
| 184 | } |
| 185 | } |
| 186 | for _, msg := range file.GetMessageType() { |
| 187 | for _, nes := range msg.GetNestedType() { |
| 188 | if nes.GetName() == typeName { |
| 189 | return nes |
| 190 | } |
| 191 | if msg.GetName()+"."+nes.GetName() == typeName { |
| 192 | return nes |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | return nil |
| 198 | } |
| 199 | |
| 200 | func (desc *FileDescriptorSet) IsProto3(packageName string, typeName string) bool { |
| 201 | for _, file := range desc.GetFile() { |
| 202 | if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) { |
| 203 | continue |
| 204 | } |
| 205 | for _, msg := range file.GetMessageType() { |
| 206 | if msg.GetName() == typeName { |
| 207 | return file.GetSyntax() == "proto3" |
| 208 | } |
| 209 | } |
| 210 | for _, msg := range file.GetMessageType() { |
| 211 | for _, nes := range msg.GetNestedType() { |
| 212 | if nes.GetName() == typeName { |
| 213 | return file.GetSyntax() == "proto3" |
| 214 | } |
| 215 | if msg.GetName()+"."+nes.GetName() == typeName { |
| 216 | return file.GetSyntax() == "proto3" |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | return false |
| 222 | } |
| 223 | |
| 224 | func (msg *DescriptorProto) IsExtendable() bool { |
| 225 | return len(msg.GetExtensionRange()) > 0 |
| 226 | } |
| 227 | |
| 228 | func (desc *FileDescriptorSet) FindExtension(packageName string, typeName string, fieldName string) (extPackageName string, field *FieldDescriptorProto) { |
| 229 | parent := desc.GetMessage(packageName, typeName) |
| 230 | if parent == nil { |
| 231 | return "", nil |
| 232 | } |
| 233 | if !parent.IsExtendable() { |
| 234 | return "", nil |
| 235 | } |
| 236 | extendee := "." + packageName + "." + typeName |
| 237 | for _, file := range desc.GetFile() { |
| 238 | for _, ext := range file.GetExtension() { |
| 239 | if strings.Map(dotToUnderscore, file.GetPackage()) == strings.Map(dotToUnderscore, packageName) { |
| 240 | if !(ext.GetExtendee() == typeName || ext.GetExtendee() == extendee) { |
| 241 | continue |
| 242 | } |
| 243 | } else { |
| 244 | if ext.GetExtendee() != extendee { |
| 245 | continue |
| 246 | } |
| 247 | } |
| 248 | if ext.GetName() == fieldName { |
| 249 | return file.GetPackage(), ext |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | return "", nil |
| 254 | } |
| 255 | |
| 256 | func (desc *FileDescriptorSet) FindExtensionByFieldNumber(packageName string, typeName string, fieldNum int32) (extPackageName string, field *FieldDescriptorProto) { |
| 257 | parent := desc.GetMessage(packageName, typeName) |
| 258 | if parent == nil { |
| 259 | return "", nil |
| 260 | } |
| 261 | if !parent.IsExtendable() { |
| 262 | return "", nil |
| 263 | } |
| 264 | extendee := "." + packageName + "." + typeName |
| 265 | for _, file := range desc.GetFile() { |
| 266 | for _, ext := range file.GetExtension() { |
| 267 | if strings.Map(dotToUnderscore, file.GetPackage()) == strings.Map(dotToUnderscore, packageName) { |
| 268 | if !(ext.GetExtendee() == typeName || ext.GetExtendee() == extendee) { |
| 269 | continue |
| 270 | } |
| 271 | } else { |
| 272 | if ext.GetExtendee() != extendee { |
| 273 | continue |
| 274 | } |
| 275 | } |
| 276 | if ext.GetNumber() == fieldNum { |
| 277 | return file.GetPackage(), ext |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | return "", nil |
| 282 | } |
| 283 | |
| 284 | func (desc *FileDescriptorSet) FindMessage(packageName string, typeName string, fieldName string) (msgPackageName string, msgName string) { |
| 285 | parent := desc.GetMessage(packageName, typeName) |
| 286 | if parent == nil { |
| 287 | return "", "" |
| 288 | } |
| 289 | field := parent.GetFieldDescriptor(fieldName) |
| 290 | if field == nil { |
| 291 | var extPackageName string |
| 292 | extPackageName, field = desc.FindExtension(packageName, typeName, fieldName) |
| 293 | if field == nil { |
| 294 | return "", "" |
| 295 | } |
| 296 | packageName = extPackageName |
| 297 | } |
| 298 | typeNames := strings.Split(field.GetTypeName(), ".") |
| 299 | if len(typeNames) == 1 { |
| 300 | msg := desc.GetMessage(packageName, typeName) |
| 301 | if msg == nil { |
| 302 | return "", "" |
| 303 | } |
| 304 | return packageName, msg.GetName() |
| 305 | } |
| 306 | if len(typeNames) > 2 { |
| 307 | for i := 1; i < len(typeNames)-1; i++ { |
| 308 | packageName = strings.Join(typeNames[1:len(typeNames)-i], ".") |
| 309 | typeName = strings.Join(typeNames[len(typeNames)-i:], ".") |
| 310 | msg := desc.GetMessage(packageName, typeName) |
| 311 | if msg != nil { |
| 312 | typeNames := strings.Split(msg.GetName(), ".") |
| 313 | if len(typeNames) == 1 { |
| 314 | return packageName, msg.GetName() |
| 315 | } |
| 316 | return strings.Join(typeNames[1:len(typeNames)-1], "."), typeNames[len(typeNames)-1] |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | return "", "" |
| 321 | } |
| 322 | |
| 323 | func (msg *DescriptorProto) GetFieldDescriptor(fieldName string) *FieldDescriptorProto { |
| 324 | for _, field := range msg.GetField() { |
| 325 | if field.GetName() == fieldName { |
| 326 | return field |
| 327 | } |
| 328 | } |
| 329 | return nil |
| 330 | } |
| 331 | |
| 332 | func (desc *FileDescriptorSet) GetEnum(packageName string, typeName string) *EnumDescriptorProto { |
| 333 | for _, file := range desc.GetFile() { |
| 334 | if strings.Map(dotToUnderscore, file.GetPackage()) != strings.Map(dotToUnderscore, packageName) { |
| 335 | continue |
| 336 | } |
| 337 | for _, enum := range file.GetEnumType() { |
| 338 | if enum.GetName() == typeName { |
| 339 | return enum |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | return nil |
| 344 | } |
| 345 | |
| 346 | func (f *FieldDescriptorProto) IsEnum() bool { |
| 347 | return *f.Type == FieldDescriptorProto_TYPE_ENUM |
| 348 | } |
| 349 | |
| 350 | func (f *FieldDescriptorProto) IsMessage() bool { |
| 351 | return *f.Type == FieldDescriptorProto_TYPE_MESSAGE |
| 352 | } |
| 353 | |
| 354 | func (f *FieldDescriptorProto) IsBytes() bool { |
| 355 | return *f.Type == FieldDescriptorProto_TYPE_BYTES |
| 356 | } |
| 357 | |
| 358 | func (f *FieldDescriptorProto) IsRepeated() bool { |
| 359 | return f.Label != nil && *f.Label == FieldDescriptorProto_LABEL_REPEATED |
| 360 | } |
| 361 | |
| 362 | func (f *FieldDescriptorProto) IsString() bool { |
| 363 | return *f.Type == FieldDescriptorProto_TYPE_STRING |
| 364 | } |
| 365 | |
| 366 | func (f *FieldDescriptorProto) IsBool() bool { |
| 367 | return *f.Type == FieldDescriptorProto_TYPE_BOOL |
| 368 | } |
| 369 | |
| 370 | func (f *FieldDescriptorProto) IsRequired() bool { |
| 371 | return f.Label != nil && *f.Label == FieldDescriptorProto_LABEL_REQUIRED |
| 372 | } |
| 373 | |
| 374 | func (f *FieldDescriptorProto) IsPacked() bool { |
| 375 | return f.Options != nil && f.GetOptions().GetPacked() |
| 376 | } |
| 377 | |
| 378 | func (f *FieldDescriptorProto) IsPacked3() bool { |
| 379 | if f.IsRepeated() && f.IsScalar() { |
| 380 | if f.Options == nil || f.GetOptions().Packed == nil { |
| 381 | return true |
| 382 | } |
| 383 | return f.Options != nil && f.GetOptions().GetPacked() |
| 384 | } |
| 385 | return false |
| 386 | } |
| 387 | |
| 388 | func (m *DescriptorProto) HasExtension() bool { |
| 389 | return len(m.ExtensionRange) > 0 |
| 390 | } |