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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef DEVICE_HID_HID_REPORT_DESCRIPTOR_H_ |
| 6 #define DEVICE_HID_HID_REPORT_DESCRIPTOR_H_ |
| 7 |
| 8 #include <sstream> |
| 9 #include <vector> |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 #include "device/hid/hid_usage_and_page.h" |
| 13 |
| 14 namespace device { |
| 15 |
| 16 // An element of a HID report descriptor. |
| 17 class HidReportDescriptorItem { |
| 18 |
| 19 #pragma pack(push, 1) |
| 20 |
| 21 public: |
| 22 enum Type { |
| 23 kTypeMain = 0, |
| 24 kTypeGlobal = 1, |
| 25 kTypeLocal = 2, |
| 26 kTypeReserved = 3 |
| 27 }; |
| 28 |
| 29 private: |
| 30 // Tags |
| 31 |
| 32 enum MainTag { |
| 33 kMainTagDefault = 0x00, // 0000 |
| 34 kMainTagInput = 0x08, // 1000 |
| 35 kMainTagOutput = 0x09, // 1001 |
| 36 kMainTagFeature = 0x0B, // 1011 |
| 37 kMainTagCollection = 0x0A, // 1010 |
| 38 kMainTagEndCollection = 0x0C // 1100 |
| 39 }; |
| 40 |
| 41 enum GlobalTag { |
| 42 kGlobalTagUsagePage = 0x00, // 0000 |
| 43 kGlobalTagLogicalMinimum = 0x01, // 0001 |
| 44 kGlobalTagLogicalMaximum = 0x02, // 0010 |
| 45 kGlobalTagPhysicalMinimum = 0x03, // 0011 |
| 46 kGlobalTagPhysicalMaximum = 0x04, // 0100 |
| 47 kGlobalTagUnitExponent = 0x05, // 0101 |
| 48 kGlobalTagUnit = 0x06, // 0110 |
| 49 kGlobalTagReportSize = 0x07, // 0111 |
| 50 kGlobalTagReportId = 0x08, // 1000 |
| 51 kGlobalTagReportCount = 0x09, // 1001 |
| 52 kGlobalTagPush = 0x0A, // 1010 |
| 53 kGlobalTagPop = 0x0B // 1011 |
| 54 }; |
| 55 |
| 56 enum LocalTag { |
| 57 kLocalTagUsage = 0x00, // 0000 |
| 58 kLocalTagUsageMinimum = 0x01, // 0001 |
| 59 kLocalTagUsageMaximum = 0x02, // 0010 |
| 60 kLocalTagDesignatorIndex = 0x03, // 0011 |
| 61 kLocalTagDesignatorMinimum = 0x04, // 0100 |
| 62 kLocalTagDesignatorMaximum = 0x05, // 0101 |
| 63 kLocalTagStringIndex = 0x07, // 0111 |
| 64 kLocalTagStringMinimum = 0x08, // 1000 |
| 65 kLocalTagStringMaximum = 0x09, // 1001 |
| 66 kLocalTagDelimiter = 0x0A // 1010 |
| 67 }; |
| 68 |
| 69 enum ReservedTag { |
| 70 kReservedTagLong = 0xF // 1111 |
| 71 }; |
| 72 |
| 73 public: |
| 74 enum Tag { |
| 75 kTagDefault = kMainTagDefault << 2 | kTypeMain, |
| 76 kTagInput = kMainTagInput << 2 | kTypeMain, |
| 77 kTagOutput = kMainTagOutput << 2 | kTypeMain, |
| 78 kTagFeature = kMainTagFeature << 2 | kTypeMain, |
| 79 kTagCollection = kMainTagCollection << 2 | kTypeMain, |
| 80 kTagEndCollection = kMainTagEndCollection << 2 | kTypeMain, |
| 81 kTagUsagePage = kGlobalTagUsagePage << 2 | kTypeGlobal, |
| 82 kTagLogicalMinimum = kGlobalTagLogicalMinimum << 2 | kTypeGlobal, |
| 83 kTagLogicalMaximum = kGlobalTagLogicalMaximum << 2 | kTypeGlobal, |
| 84 kTagPhysicalMinimum = kGlobalTagPhysicalMinimum << 2 | kTypeGlobal, |
| 85 kTagPhysicalMaximum = kGlobalTagPhysicalMaximum << 2 | kTypeGlobal, |
| 86 kTagUnitExponent = kGlobalTagUnitExponent << 2 | kTypeGlobal, |
| 87 kTagUnit = kGlobalTagUnit << 2 | kTypeGlobal, |
| 88 kTagReportSize = kGlobalTagReportSize << 2 | kTypeGlobal, |
| 89 kTagReportId = kGlobalTagReportId << 2 | kTypeGlobal, |
| 90 kTagReportCount = kGlobalTagReportCount << 2 | kTypeGlobal, |
| 91 kTagPush = kGlobalTagPush << 2 | kTypeGlobal, |
| 92 kTagPop = kGlobalTagPop << 2 | kTypeGlobal, |
| 93 kTagUsage = kLocalTagUsage << 2 | kTypeLocal, |
| 94 kTagUsageMinimum = kLocalTagUsageMinimum << 2 | kTypeLocal, |
| 95 kTagUsageMaximum = kLocalTagUsageMaximum << 2 | kTypeLocal, |
| 96 kTagDesignatorIndex = kLocalTagDesignatorIndex << 2 | kTypeLocal, |
| 97 kTagDesignatorMinimum = kLocalTagDesignatorMinimum << 2 | kTypeLocal, |
| 98 kTagDesignatorMaximum = kLocalTagDesignatorMaximum << 2 | kTypeLocal, |
| 99 kTagStringIndex = kLocalTagStringIndex << 2 | kTypeLocal, |
| 100 kTagStringMinimum = kLocalTagStringMinimum << 2 | kTypeLocal, |
| 101 kTagStringMaximum = kLocalTagStringMaximum << 2 | kTypeLocal, |
| 102 kTagDelimiter = kLocalTagDelimiter << 2 | kTypeLocal, |
| 103 kTagLong = kReservedTagLong << 2 | kTypeReserved |
| 104 }; |
| 105 |
| 106 private: |
| 107 friend std::ostream& operator<<(std::ostream& os, const Tag& tag) { |
| 108 switch (tag) { |
| 109 case kTagDefault: |
| 110 os << "Default"; |
| 111 break; |
| 112 case kTagInput: |
| 113 os << "Input"; |
| 114 break; |
| 115 case kTagOutput: |
| 116 os << "Output"; |
| 117 break; |
| 118 case kTagFeature: |
| 119 os << "Feature"; |
| 120 break; |
| 121 case kTagCollection: |
| 122 os << "Collection"; |
| 123 break; |
| 124 case kTagEndCollection: |
| 125 os << "End Collection"; |
| 126 break; |
| 127 case kTagUsagePage: |
| 128 os << "Usage Page"; |
| 129 break; |
| 130 case kTagLogicalMinimum: |
| 131 os << "Logical Minimum"; |
| 132 break; |
| 133 case kTagLogicalMaximum: |
| 134 os << "Logical Maximum"; |
| 135 break; |
| 136 case kTagPhysicalMinimum: |
| 137 os << "Physical Minimum"; |
| 138 break; |
| 139 case kTagPhysicalMaximum: |
| 140 os << "Physical Maximum"; |
| 141 break; |
| 142 case kTagUnitExponent: |
| 143 os << "Unit Exponent"; |
| 144 break; |
| 145 case kTagUnit: |
| 146 os << "Unit"; |
| 147 break; |
| 148 case kTagReportSize: |
| 149 os << "Report Size"; |
| 150 break; |
| 151 case kTagReportId: |
| 152 os << "Report ID"; |
| 153 break; |
| 154 case kTagReportCount: |
| 155 os << "Report Count"; |
| 156 break; |
| 157 case kTagPush: |
| 158 os << "Push"; |
| 159 break; |
| 160 case kTagPop: |
| 161 os << "Pop"; |
| 162 break; |
| 163 case kTagUsage: |
| 164 os << "Usage"; |
| 165 break; |
| 166 case kTagUsageMinimum: |
| 167 os << "Usage Minimum"; |
| 168 break; |
| 169 case kTagUsageMaximum: |
| 170 os << "Usage Maximum"; |
| 171 break; |
| 172 case kTagDesignatorIndex: |
| 173 os << "Designator Index"; |
| 174 break; |
| 175 case kTagDesignatorMinimum: |
| 176 os << "Designator Minimum"; |
| 177 break; |
| 178 case kTagDesignatorMaximum: |
| 179 os << "Designator Maximum"; |
| 180 break; |
| 181 case kTagStringIndex: |
| 182 os << "String Index"; |
| 183 break; |
| 184 case kTagStringMinimum: |
| 185 os << "String Minimum"; |
| 186 break; |
| 187 case kTagStringMaximum: |
| 188 os << "String Maximum"; |
| 189 break; |
| 190 case kTagDelimiter: |
| 191 os << "Delimeter"; |
| 192 break; |
| 193 case kTagLong: |
| 194 os << "Long"; |
| 195 break; |
| 196 default: |
| 197 NOTREACHED(); |
| 198 break; |
| 199 } |
| 200 |
| 201 return os; |
| 202 }; |
| 203 |
| 204 public: |
| 205 // Headers |
| 206 |
| 207 struct Header { |
| 208 uint8_t size : 2; |
| 209 uint8_t type : 2; |
| 210 uint8_t tag : 4; |
| 211 }; |
| 212 |
| 213 struct LongHeader { |
| 214 Header short_header; |
| 215 uint8_t data_size; |
| 216 uint8_t long_item_tag; |
| 217 }; |
| 218 |
| 219 // Data |
| 220 |
| 221 // (Short) Main items |
| 222 |
| 223 struct Default { |
| 224 private: |
| 225 friend std::ostream& operator<<(std::ostream& os, const Default& data) { |
| 226 return os; |
| 227 } |
| 228 }; |
| 229 |
| 230 struct Input_Output_Feature { |
| 231 uint8_t data_or_constant : 1; |
| 232 uint8_t array_or_variable : 1; |
| 233 uint8_t absolute_or_relative : 1; |
| 234 uint8_t wrap : 1; |
| 235 uint8_t linear : 1; |
| 236 uint8_t preferred : 1; |
| 237 uint8_t null : 1; |
| 238 uint8_t reserved_1 : 1; |
| 239 uint8_t bit_field_or_buffer : 1; |
| 240 uint8_t reserved_2 : 1; |
| 241 |
| 242 private: |
| 243 friend std::ostream& operator<<(std::ostream& os, |
| 244 const Input_Output_Feature& data) { |
| 245 if (data.data_or_constant) |
| 246 os << "Con"; |
| 247 else |
| 248 os << "Dat"; |
| 249 if (data.array_or_variable) |
| 250 os << "|Arr"; |
| 251 else |
| 252 os << "|Var"; |
| 253 if (data.absolute_or_relative) |
| 254 os << "|Abs"; |
| 255 else |
| 256 os << "|Rel"; |
| 257 if (data.wrap) |
| 258 os << "|Wrp"; |
| 259 else |
| 260 os << "|NoWrp"; |
| 261 if (data.linear) |
| 262 os << "|NoLin"; |
| 263 else |
| 264 os << "|Lin"; |
| 265 if (data.preferred) |
| 266 os << "|NoPrf"; |
| 267 else |
| 268 os << "|Prf"; |
| 269 if (data.null) |
| 270 os << "|Null"; |
| 271 else |
| 272 os << "|NoNull"; |
| 273 if (data.bit_field_or_buffer) |
| 274 os << "|Buff"; |
| 275 else |
| 276 os << "|BitF"; |
| 277 return os; |
| 278 } |
| 279 }; |
| 280 |
| 281 struct Collection { |
| 282 |
| 283 enum CollectionType { |
| 284 kCollectionTypePhysical, |
| 285 kCollectionTypeApplication, |
| 286 kCollectionTypeLogical, |
| 287 kCollectionTypeReport, |
| 288 kCollectionTypeNamedArray, |
| 289 kCollectionTypeUsageSwitch, |
| 290 kCollectionTypeUsageModifier, |
| 291 kCollectionTypeReserved, |
| 292 kCollectionTypeVendor |
| 293 }; |
| 294 |
| 295 uint8_t value; |
| 296 |
| 297 CollectionType collectionType() const { |
| 298 switch (value) { |
| 299 case 0x00: |
| 300 return kCollectionTypePhysical; |
| 301 case 0x01: |
| 302 return kCollectionTypePhysical; |
| 303 case 0x02: |
| 304 return kCollectionTypePhysical; |
| 305 case 0x03: |
| 306 return kCollectionTypePhysical; |
| 307 case 0x04: |
| 308 return kCollectionTypePhysical; |
| 309 case 0x05: |
| 310 return kCollectionTypePhysical; |
| 311 case 0x06: |
| 312 return kCollectionTypePhysical; |
| 313 default: |
| 314 break; |
| 315 } |
| 316 |
| 317 if (0x80 < value && value < 0xFF) |
| 318 return kCollectionTypeVendor; |
| 319 |
| 320 return kCollectionTypeReserved; |
| 321 } |
| 322 |
| 323 private: |
| 324 friend std::ostream& operator<<(std::ostream& os, const Collection& data) { |
| 325 switch (data.collectionType()) { |
| 326 case kCollectionTypePhysical: |
| 327 os << "Physical"; |
| 328 break; |
| 329 case kCollectionTypeApplication: |
| 330 os << "Application"; |
| 331 break; |
| 332 case kCollectionTypeLogical: |
| 333 os << "Logical"; |
| 334 break; |
| 335 case kCollectionTypeReport: |
| 336 os << "Report"; |
| 337 break; |
| 338 case kCollectionTypeNamedArray: |
| 339 os << "Named Array"; |
| 340 break; |
| 341 case kCollectionTypeUsageSwitch: |
| 342 os << "Usage Switch"; |
| 343 break; |
| 344 case kCollectionTypeUsageModifier: |
| 345 os << "Usage Modifier"; |
| 346 break; |
| 347 case kCollectionTypeReserved: |
| 348 os << "Reserved"; |
| 349 break; |
| 350 case kCollectionTypeVendor: |
| 351 os << "Vendor"; |
| 352 break; |
| 353 default: |
| 354 NOTREACHED(); |
| 355 break; |
| 356 } |
| 357 return os; |
| 358 } |
| 359 }; |
| 360 |
| 361 struct EndCollection { |
| 362 private: |
| 363 friend std::ostream& operator<<(std::ostream& os, |
| 364 const EndCollection& data) { |
| 365 return os; |
| 366 } |
| 367 }; |
| 368 |
| 369 // (Short) Global Items |
| 370 |
| 371 struct UsagePage { |
| 372 uint16_t value; |
| 373 |
| 374 private: |
| 375 friend std::ostream& operator<<(std::ostream& os, const UsagePage& data) { |
| 376 HidUsageAndPage::Page page = (HidUsageAndPage::Page)data.value; |
| 377 os << page; |
| 378 return os; |
| 379 } |
| 380 }; |
| 381 |
| 382 struct LogicalMinimum { |
| 383 int32_t value; |
| 384 |
| 385 private: |
| 386 friend std::ostream& operator<<(std::ostream& os, |
| 387 const LogicalMinimum& data) { |
| 388 os << data.value; |
| 389 return os; |
| 390 } |
| 391 }; |
| 392 |
| 393 struct LogicalMaximum { |
| 394 int32_t value; |
| 395 |
| 396 private: |
| 397 friend std::ostream& operator<<(std::ostream& os, |
| 398 const LogicalMaximum& data) { |
| 399 os << data.value; |
| 400 return os; |
| 401 } |
| 402 }; |
| 403 |
| 404 struct PhysicalMinimum { |
| 405 int32_t value; |
| 406 |
| 407 private: |
| 408 friend std::ostream& operator<<(std::ostream& os, |
| 409 const PhysicalMinimum& data) { |
| 410 os << data.value; |
| 411 return os; |
| 412 } |
| 413 }; |
| 414 |
| 415 struct PhysicalMaximum { |
| 416 int32_t value; |
| 417 |
| 418 private: |
| 419 friend std::ostream& operator<<(std::ostream& os, |
| 420 const PhysicalMaximum& data) { |
| 421 os << data.value; |
| 422 return os; |
| 423 } |
| 424 }; |
| 425 |
| 426 struct UnitExponent { |
| 427 uint32_t value; |
| 428 |
| 429 private: |
| 430 friend std::ostream& operator<<(std::ostream& os, |
| 431 const UnitExponent& data) { |
| 432 os << data.value; |
| 433 return os; |
| 434 } |
| 435 }; |
| 436 |
| 437 struct Unit { |
| 438 uint32_t value; |
| 439 |
| 440 private: |
| 441 friend std::ostream& operator<<(std::ostream& os, const Unit& data) { |
| 442 os << data.value; |
| 443 return os; |
| 444 } |
| 445 }; |
| 446 |
| 447 struct ReportSize { |
| 448 uint32_t value; |
| 449 |
| 450 private: |
| 451 friend std::ostream& operator<<(std::ostream& os, const ReportSize& data) { |
| 452 os << data.value; |
| 453 return os; |
| 454 } |
| 455 }; |
| 456 |
| 457 struct ReportId { |
| 458 uint32_t value; |
| 459 |
| 460 private: |
| 461 friend std::ostream& operator<<(std::ostream& os, const ReportId& data) { |
| 462 os << "0x" << std::hex << std::uppercase << data.value; |
| 463 return os; |
| 464 } |
| 465 }; |
| 466 |
| 467 struct ReportCount { |
| 468 uint32_t value; |
| 469 |
| 470 private: |
| 471 friend std::ostream& operator<<(std::ostream& os, const ReportCount& data) { |
| 472 os << data.value; |
| 473 return os; |
| 474 } |
| 475 }; |
| 476 |
| 477 struct Push { |
| 478 private: |
| 479 friend std::ostream& operator<<(std::ostream& os, const Push& data) { |
| 480 return os; |
| 481 } |
| 482 }; |
| 483 |
| 484 struct Pop { |
| 485 private: |
| 486 friend std::ostream& operator<<(std::ostream& os, const Pop& data) { |
| 487 return os; |
| 488 } |
| 489 }; |
| 490 |
| 491 // (Short) Local Items |
| 492 |
| 493 struct Usage { |
| 494 uint16_t value; |
| 495 |
| 496 private: |
| 497 friend std::ostream& operator<<(std::ostream& os, const Usage& data) { |
| 498 os << "0x" << std::hex << std::uppercase << data.value; |
| 499 return os; |
| 500 } |
| 501 }; |
| 502 |
| 503 struct UsageMinimum { |
| 504 uint16_t value; |
| 505 |
| 506 private: |
| 507 friend std::ostream& operator<<(std::ostream& os, |
| 508 const UsageMinimum& data) { |
| 509 os << "0x" << std::hex << std::uppercase << data.value; |
| 510 return os; |
| 511 } |
| 512 }; |
| 513 |
| 514 struct UsageMaximum { |
| 515 uint16_t value; |
| 516 |
| 517 private: |
| 518 friend std::ostream& operator<<(std::ostream& os, |
| 519 const UsageMaximum& data) { |
| 520 os << "0x" << std::hex << std::uppercase << data.value; |
| 521 return os; |
| 522 } |
| 523 }; |
| 524 |
| 525 struct DesignatorIndex { |
| 526 private: |
| 527 friend std::ostream& operator<<(std::ostream& os, |
| 528 const DesignatorIndex& data) { |
| 529 return os; |
| 530 } |
| 531 }; |
| 532 |
| 533 struct DesignatorMinimum { |
| 534 private: |
| 535 friend std::ostream& operator<<(std::ostream& os, |
| 536 const DesignatorMinimum& data) { |
| 537 return os; |
| 538 } |
| 539 }; |
| 540 |
| 541 struct DesignatorMaximum { |
| 542 private: |
| 543 friend std::ostream& operator<<(std::ostream& os, |
| 544 const DesignatorMaximum& data) { |
| 545 return os; |
| 546 } |
| 547 }; |
| 548 |
| 549 struct StringIndex { |
| 550 private: |
| 551 friend std::ostream& operator<<(std::ostream& os, const StringIndex& data) { |
| 552 return os; |
| 553 } |
| 554 }; |
| 555 |
| 556 struct StringMinimum { |
| 557 private: |
| 558 friend std::ostream& operator<<(std::ostream& os, |
| 559 const StringMinimum& data) { |
| 560 return os; |
| 561 } |
| 562 }; |
| 563 |
| 564 struct StringMaximum { |
| 565 private: |
| 566 friend std::ostream& operator<<(std::ostream& os, |
| 567 const StringMaximum& data) { |
| 568 return os; |
| 569 } |
| 570 }; |
| 571 |
| 572 struct Delimiter { |
| 573 private: |
| 574 friend std::ostream& operator<<(std::ostream& os, const Delimiter& data) { |
| 575 return os; |
| 576 } |
| 577 }; |
| 578 |
| 579 // (Long) Reserved items |
| 580 // nothing for now |
| 581 |
| 582 // Data union |
| 583 |
| 584 struct Data { |
| 585 union u { |
| 586 // (Short) Main items |
| 587 Default none; |
| 588 Input_Output_Feature input; |
| 589 Input_Output_Feature output; |
| 590 Input_Output_Feature feature; |
| 591 Collection collection; |
| 592 EndCollection end_collection; |
| 593 // (Short) Global items |
| 594 UsagePage usage_page; |
| 595 LogicalMinimum logical_minimum; |
| 596 LogicalMaximum logical_maximum; |
| 597 PhysicalMinimum physical_minimum; |
| 598 PhysicalMaximum physical_maximum; |
| 599 UnitExponent unit_exponent; |
| 600 Unit unit; |
| 601 ReportSize report_size; |
| 602 ReportId report_id; |
| 603 ReportCount report_count; |
| 604 Push push; |
| 605 Pop pop; |
| 606 // (Short) Local items |
| 607 Usage usage; |
| 608 UsageMinimum usage_minimum; |
| 609 UsageMaximum usage_maximum; |
| 610 DesignatorIndex designator_index; |
| 611 DesignatorMinimum designator_minimum; |
| 612 DesignatorMaximum designator_maximum; |
| 613 StringIndex string_index; |
| 614 StringMinimum string_minimum; |
| 615 StringMaximum string_maximum; |
| 616 Delimiter delimiter; |
| 617 // (Long) Reserved items |
| 618 // nothing for now |
| 619 }; |
| 620 }; |
| 621 |
| 622 #pragma pack(pop) |
| 623 |
| 624 HidReportDescriptorItem(const uint8_t* bytes, |
| 625 HidReportDescriptorItem* previous = NULL); |
| 626 ~HidReportDescriptorItem(); |
| 627 |
| 628 HidReportDescriptorItem* previous() const { |
| 629 return previous_; |
| 630 }; |
| 631 HidReportDescriptorItem* next() const { |
| 632 return next_; |
| 633 }; |
| 634 HidReportDescriptorItem* parent() const { |
| 635 return parent_; |
| 636 }; |
| 637 size_t depth() const; |
| 638 |
| 639 bool isLong() const; |
| 640 size_t headerSize() const; |
| 641 size_t payloadSize() const; |
| 642 size_t size() const; |
| 643 |
| 644 Header* header() const; |
| 645 LongHeader* longHeader() const; |
| 646 |
| 647 Tag tag() const; |
| 648 Data* data() const; |
| 649 |
| 650 private: |
| 651 friend std::ostream& operator<<(std::ostream& os, |
| 652 const HidReportDescriptorItem& item) { |
| 653 Tag tg = item.tag(); |
| 654 Data* dt = item.data(); |
| 655 |
| 656 std::ostringstream sstr; |
| 657 sstr << tg; |
| 658 sstr << " ("; |
| 659 |
| 660 long pos = sstr.tellp(); |
| 661 switch (tg) { |
| 662 case kTagDefault: |
| 663 sstr << *(Default*)dt; |
| 664 break; |
| 665 case kTagInput: |
| 666 case kTagOutput: |
| 667 case kTagFeature: |
| 668 sstr << *(Input_Output_Feature*)dt; |
| 669 break; |
| 670 case kTagCollection: |
| 671 sstr << *(Collection*)dt; |
| 672 break; |
| 673 case kTagEndCollection: |
| 674 sstr << *(EndCollection*)dt; |
| 675 break; |
| 676 case kTagUsagePage: |
| 677 sstr << *(UsagePage*)dt; |
| 678 break; |
| 679 case kTagLogicalMinimum: |
| 680 sstr << *(LogicalMinimum*)dt; |
| 681 break; |
| 682 case kTagLogicalMaximum: |
| 683 sstr << *(LogicalMaximum*)dt; |
| 684 break; |
| 685 case kTagPhysicalMinimum: |
| 686 sstr << *(PhysicalMinimum*)dt; |
| 687 break; |
| 688 case kTagPhysicalMaximum: |
| 689 sstr << *(PhysicalMaximum*)dt; |
| 690 break; |
| 691 case kTagUnitExponent: |
| 692 sstr << *(UnitExponent*)dt; |
| 693 break; |
| 694 case kTagUnit: |
| 695 sstr << *(Unit*)dt; |
| 696 break; |
| 697 case kTagReportSize: |
| 698 sstr << *(ReportSize*)dt; |
| 699 break; |
| 700 case kTagReportId: |
| 701 sstr << *(ReportId*)dt; |
| 702 break; |
| 703 case kTagReportCount: |
| 704 sstr << *(ReportCount*)dt; |
| 705 break; |
| 706 case kTagPush: |
| 707 sstr << *(Push*)dt; |
| 708 break; |
| 709 case kTagPop: |
| 710 sstr << *(Pop*)dt; |
| 711 break; |
| 712 case kTagUsage: |
| 713 sstr << *(Usage*)dt; |
| 714 break; |
| 715 case kTagUsageMinimum: |
| 716 sstr << *(UsageMinimum*)dt; |
| 717 break; |
| 718 case kTagUsageMaximum: |
| 719 sstr << *(UsageMaximum*)dt; |
| 720 break; |
| 721 case kTagDesignatorIndex: |
| 722 sstr << *(DesignatorIndex*)dt; |
| 723 break; |
| 724 case kTagDesignatorMinimum: |
| 725 sstr << *(DesignatorMinimum*)dt; |
| 726 break; |
| 727 case kTagDesignatorMaximum: |
| 728 sstr << *(DesignatorMaximum*)dt; |
| 729 break; |
| 730 case kTagStringIndex: |
| 731 sstr << *(StringIndex*)dt; |
| 732 break; |
| 733 case kTagStringMinimum: |
| 734 sstr << *(StringMinimum*)dt; |
| 735 break; |
| 736 case kTagStringMaximum: |
| 737 sstr << *(StringMaximum*)dt; |
| 738 break; |
| 739 case kTagDelimiter: |
| 740 sstr << *(Delimiter*)dt; |
| 741 break; |
| 742 case kTagLong: |
| 743 break; |
| 744 default: |
| 745 NOTREACHED(); |
| 746 break; |
| 747 } |
| 748 |
| 749 if (pos == sstr.tellp()) { |
| 750 std::string str = sstr.str(); |
| 751 str.erase(str.end() - 2, str.end()); |
| 752 os << str; |
| 753 } else { |
| 754 os << sstr.str() << ")"; |
| 755 } |
| 756 |
| 757 return os; |
| 758 } |
| 759 |
| 760 const uint8_t* bytes_; |
| 761 HidReportDescriptorItem* previous_; |
| 762 HidReportDescriptorItem* next_; |
| 763 HidReportDescriptorItem* parent_; |
| 764 }; |
| 765 |
| 766 // HID report descriptor. |
| 767 // See section 6.2.2 of HID specifications (v1.11). |
| 768 class HidReportDescriptor { |
| 769 |
| 770 private: |
| 771 static const char kIndentChar; |
| 772 |
| 773 public: |
| 774 HidReportDescriptor(const uint8_t* bytes, size_t size); |
| 775 ~HidReportDescriptor(); |
| 776 |
| 777 const std::vector<HidReportDescriptorItem*>& items() const; |
| 778 std::vector<HidUsageAndPage> topLevelCollections() const; |
| 779 |
| 780 private: |
| 781 friend std::ostream& operator<<(std::ostream& os, |
| 782 const HidReportDescriptor& descriptor) { |
| 783 for (std::vector<HidReportDescriptorItem*>::const_iterator items_iter = |
| 784 descriptor.items_.begin(); |
| 785 items_iter != descriptor.items_.end(); |
| 786 ++items_iter) { |
| 787 HidReportDescriptorItem* item = *items_iter; |
| 788 size_t indentLevel = item->depth(); |
| 789 for (size_t i = 0; i < indentLevel; i++) |
| 790 os << kIndentChar; |
| 791 os << *item << std::endl; |
| 792 } |
| 793 return os; |
| 794 } |
| 795 |
| 796 const uint8_t* bytes_; |
| 797 size_t size_; |
| 798 std::vector<HidReportDescriptorItem*> items_; |
| 799 }; |
| 800 |
| 801 } // namespace device |
| 802 |
| 803 #endif // DEVICE_HID_HID_REPORT_DESCRIPTOR_H_ |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 225513005:
chrome.hid : enrich device info with Top-Level collections usages (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master