SourceManager.h revision b9c3f966b103f7cfe8e5e60007c4c8b38f7298eb
1//===--- SourceManager.h - Track and cache source files ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the SourceManager interface. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_SOURCEMANAGER_H 15#define LLVM_CLANG_SOURCEMANAGER_H 16 17#include "clang/Basic/SourceLocation.h" 18#include "llvm/Bitcode/SerializationFwd.h" 19#include "llvm/Support/DataTypes.h" 20#include <vector> 21#include <set> 22#include <list> 23#include <cassert> 24 25namespace llvm { 26class MemoryBuffer; 27} 28 29namespace clang { 30 31class SourceManager; 32class FileManager; 33class FileEntry; 34class IdentifierTokenInfo; 35class LineTableInfo; 36 37/// SrcMgr - Public enums and private classes that are part of the 38/// SourceManager implementation. 39/// 40namespace SrcMgr { 41 /// CharacteristicKind - This is used to represent whether a file or directory 42 /// holds normal user code, system code, or system code which is implicitly 43 /// 'extern "C"' in C++ mode. Entire directories can be tagged with this 44 /// (this is maintained by DirectoryLookup and friends) as can specific 45 /// FileIDInfos when a #pragma system_header is seen or various other cases. 46 /// 47 enum CharacteristicKind { 48 C_User, C_System, C_ExternCSystem 49 }; 50 51 /// ContentCache - Once instance of this struct is kept for every file 52 /// loaded or used. This object owns the MemoryBuffer object. 53 class ContentCache { 54 /// Buffer - The actual buffer containing the characters from the input 55 /// file. This is owned by the ContentCache object. 56 mutable const llvm::MemoryBuffer *Buffer; 57 58 public: 59 /// Reference to the file entry. This reference does not own 60 /// the FileEntry object. It is possible for this to be NULL if 61 /// the ContentCache encapsulates an imaginary text buffer. 62 const FileEntry *Entry; 63 64 /// SourceLineCache - A new[]'d array of offsets for each source line. This 65 /// is lazily computed. This is owned by the ContentCache object. 66 unsigned *SourceLineCache; 67 68 /// NumLines - The number of lines in this ContentCache. This is only valid 69 /// if SourceLineCache is non-null. 70 unsigned NumLines; 71 72 /// getBuffer - Returns the memory buffer for the associated content. 73 const llvm::MemoryBuffer *getBuffer() const; 74 75 /// getSize - Returns the size of the content encapsulated by this 76 /// ContentCache. This can be the size of the source file or the size of an 77 /// arbitrary scratch buffer. If the ContentCache encapsulates a source 78 /// file this size is retrieved from the file's FileEntry. 79 unsigned getSize() const; 80 81 /// getSizeBytesMapped - Returns the number of bytes actually mapped for 82 /// this ContentCache. This can be 0 if the MemBuffer was not actually 83 /// instantiated. 84 unsigned getSizeBytesMapped() const; 85 86 void setBuffer(const llvm::MemoryBuffer *B) { 87 assert(!Buffer && "MemoryBuffer already set."); 88 Buffer = B; 89 } 90 91 ContentCache(const FileEntry *e = NULL) 92 : Buffer(NULL), Entry(e), SourceLineCache(NULL), NumLines(0) {} 93 94 ~ContentCache(); 95 96 /// The copy ctor does not allow copies where source object has either 97 /// a non-NULL Buffer or SourceLineCache. Ownership of allocated memory 98 /// is not transfered, so this is a logical error. 99 ContentCache(const ContentCache &RHS) : Buffer(NULL),SourceLineCache(NULL) { 100 Entry = RHS.Entry; 101 102 assert (RHS.Buffer == NULL && RHS.SourceLineCache == NULL 103 && "Passed ContentCache object cannot own a buffer."); 104 105 NumLines = RHS.NumLines; 106 } 107 108 /// Emit - Emit this ContentCache to Bitcode. 109 void Emit(llvm::Serializer &S) const; 110 111 /// ReadToSourceManager - Reconstitute a ContentCache from Bitcode 112 // and store it in the specified SourceManager. 113 static void ReadToSourceManager(llvm::Deserializer &D, SourceManager &SM, 114 FileManager *FMgr, std::vector<char> &Buf); 115 116 private: 117 // Disable assignments. 118 ContentCache &operator=(const ContentCache& RHS); 119 }; 120 121 /// FileInfo - Information about a FileID, basically just the logical file 122 /// that it represents and include stack information. 123 /// 124 /// Each FileInfo has include stack information, indicating where it came 125 /// from. This information encodes the #include chain that a token was 126 /// instantiated from. The main include file has an invalid IncludeLoc. 127 /// 128 /// FileInfos contain a "ContentCache *", with the contents of the file. 129 /// 130 class FileInfo { 131 /// IncludeLoc - The location of the #include that brought in this file. 132 /// This is an invalid SLOC for the main file (top of the #include chain). 133 unsigned IncludeLoc; // Really a SourceLocation 134 135 /// Data - This contains the ContentCache* and the bits indicating the 136 /// characteristic of the file and whether it has #line info, all bitmangled 137 /// together. 138 uintptr_t Data; 139 public: 140 /// get - Return a FileInfo object. 141 static FileInfo get(SourceLocation IL, const ContentCache *Con, 142 CharacteristicKind FileCharacter) { 143 FileInfo X; 144 X.IncludeLoc = IL.getRawEncoding(); 145 X.Data = (uintptr_t)Con; 146 assert((X.Data & 7) == 0 &&"ContentCache pointer insufficiently aligned"); 147 assert((unsigned)FileCharacter < 4 && "invalid file character"); 148 X.Data |= (unsigned)FileCharacter; 149 return X; 150 } 151 152 SourceLocation getIncludeLoc() const { 153 return SourceLocation::getFromRawEncoding(IncludeLoc); 154 } 155 const ContentCache* getContentCache() const { 156 return reinterpret_cast<const ContentCache*>(Data & ~7UL); 157 } 158 159 /// getCharacteristic - Return whether this is a system header or not. 160 CharacteristicKind getFileCharacteristic() const { 161 return (CharacteristicKind)(Data & 3); 162 } 163 }; 164 165 /// InstantiationInfo - Each InstantiationInfo encodes the Instantiation 166 /// location - where the token was ultimately instantiated, and the 167 /// SpellingLoc - where the actual character data for the token came from. 168 class InstantiationInfo { 169 unsigned InstantiationLoc, SpellingLoc; // Really these are SourceLocations. 170 public: 171 SourceLocation getInstantiationLoc() const { 172 return SourceLocation::getFromRawEncoding(InstantiationLoc); 173 } 174 SourceLocation getSpellingLoc() const { 175 return SourceLocation::getFromRawEncoding(SpellingLoc); 176 } 177 178 /// get - Return a InstantiationInfo for an expansion. VL specifies 179 /// the instantiation location (where the macro is expanded), and SL 180 /// specifies the spelling location (where the characters from the token 181 /// come from). Both VL and PL refer to normal File SLocs. 182 static InstantiationInfo get(SourceLocation IL, SourceLocation SL) { 183 InstantiationInfo X; 184 X.InstantiationLoc = IL.getRawEncoding(); 185 X.SpellingLoc = SL.getRawEncoding(); 186 return X; 187 } 188 }; 189 190 /// SLocEntry - This is a discriminated union of FileInfo and 191 /// InstantiationInfo. SourceManager keeps an array of these objects, and 192 /// they are uniquely identified by the FileID datatype. 193 class SLocEntry { 194 unsigned Offset; // low bit is set for instantiation info. 195 union { 196 FileInfo File; 197 InstantiationInfo Instantiation; 198 }; 199 public: 200 unsigned getOffset() const { return Offset >> 1; } 201 202 bool isInstantiation() const { return Offset & 1; } 203 bool isFile() const { return !isInstantiation(); } 204 205 const FileInfo &getFile() const { 206 assert(isFile() && "Not a file SLocEntry!"); 207 return File; 208 } 209 210 const InstantiationInfo &getInstantiation() const { 211 assert(isInstantiation() && "Not an instantiation SLocEntry!"); 212 return Instantiation; 213 } 214 215 static SLocEntry get(unsigned Offset, const FileInfo &FI) { 216 SLocEntry E; 217 E.Offset = Offset << 1; 218 E.File = FI; 219 return E; 220 } 221 222 static SLocEntry get(unsigned Offset, const InstantiationInfo &II) { 223 SLocEntry E; 224 E.Offset = (Offset << 1) | 1; 225 E.Instantiation = II; 226 return E; 227 } 228 }; 229} // end SrcMgr namespace. 230} // end clang namespace 231 232namespace std { 233template <> struct less<clang::SrcMgr::ContentCache> { 234 inline bool operator()(const clang::SrcMgr::ContentCache& L, 235 const clang::SrcMgr::ContentCache& R) const { 236 return L.Entry < R.Entry; 237 } 238}; 239} // end std namespace 240 241namespace clang { 242 243/// SourceManager - This file handles loading and caching of source files into 244/// memory. This object owns the MemoryBuffer objects for all of the loaded 245/// files and assigns unique FileID's for each unique #include chain. 246/// 247/// The SourceManager can be queried for information about SourceLocation 248/// objects, turning them into either spelling or instantiation locations. 249/// Spelling locations represent where the bytes corresponding to a token came 250/// from and instantiation locations represent where the location is in the 251/// user's view. In the case of a macro expansion, for example, the spelling 252/// location indicates where the expanded token came from and the instantiation 253/// location specifies where it was expanded. 254class SourceManager { 255 /// FileInfos - Memoized information about all of the files tracked by this 256 /// SourceManager. This set allows us to merge ContentCache entries based 257 /// on their FileEntry*. All ContentCache objects will thus have unique, 258 /// non-null, FileEntry pointers. 259 std::set<SrcMgr::ContentCache> FileInfos; 260 261 /// MemBufferInfos - Information about various memory buffers that we have 262 /// read in. This is a list, instead of a vector, because we need pointers to 263 /// the ContentCache objects to be stable. All FileEntry* within the 264 /// stored ContentCache objects are NULL, as they do not refer to a file. 265 std::list<SrcMgr::ContentCache> MemBufferInfos; 266 267 /// SLocEntryTable - This is an array of SLocEntry's that we have created. 268 /// FileID is an index into this vector. This array is sorted by the offset. 269 std::vector<SrcMgr::SLocEntry> SLocEntryTable; 270 /// NextOffset - This is the next available offset that a new SLocEntry can 271 /// start at. It is SLocEntryTable.back().getOffset()+size of back() entry. 272 unsigned NextOffset; 273 274 /// LastFileIDLookup - This is a one-entry cache to speed up getFileID. 275 /// LastFileIDLookup records the last FileID looked up or created, because it 276 /// is very common to look up many tokens from the same file. 277 mutable FileID LastFileIDLookup; 278 279 /// LineTable - This holds information for #line directives. It is referenced 280 /// by indices from SLocEntryTable. 281 LineTableInfo *LineTable; 282 283 /// LastLineNo - These ivars serve as a cache used in the getLineNumber 284 /// method which is used to speedup getLineNumber calls to nearby locations. 285 mutable FileID LastLineNoFileIDQuery; 286 mutable SrcMgr::ContentCache *LastLineNoContentCache; 287 mutable unsigned LastLineNoFilePos; 288 mutable unsigned LastLineNoResult; 289 290 /// MainFileID - The file ID for the main source file of the translation unit. 291 FileID MainFileID; 292 293 // Statistics for -print-stats. 294 mutable unsigned NumLinearScans, NumBinaryProbes; 295 296 // SourceManager doesn't support copy construction. 297 explicit SourceManager(const SourceManager&); 298 void operator=(const SourceManager&); 299public: 300 SourceManager() : LineTable(0), NumLinearScans(0), NumBinaryProbes(0) { 301 clearIDTables(); 302 } 303 ~SourceManager(); 304 305 void clearIDTables(); 306 307 //===--------------------------------------------------------------------===// 308 // MainFileID creation and querying methods. 309 //===--------------------------------------------------------------------===// 310 311 /// getMainFileID - Returns the FileID of the main source file. 312 FileID getMainFileID() const { return MainFileID; } 313 314 /// createMainFileID - Create the FileID for the main source file. 315 FileID createMainFileID(const FileEntry *SourceFile, 316 SourceLocation IncludePos) { 317 assert(MainFileID.isInvalid() && "MainFileID already set!"); 318 MainFileID = createFileID(SourceFile, IncludePos, SrcMgr::C_User); 319 return MainFileID; 320 } 321 322 //===--------------------------------------------------------------------===// 323 // Methods to create new FileID's and instantiations. 324 //===--------------------------------------------------------------------===// 325 326 /// createFileID - Create a new FileID that represents the specified file 327 /// being #included from the specified IncludePosition. This returns 0 on 328 /// error and translates NULL into standard input. 329 FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, 330 SrcMgr::CharacteristicKind FileCharacter) { 331 const SrcMgr::ContentCache *IR = getOrCreateContentCache(SourceFile); 332 if (IR == 0) return FileID(); // Error opening file? 333 return createFileID(IR, IncludePos, FileCharacter); 334 } 335 336 /// createFileIDForMemBuffer - Create a new FileID that represents the 337 /// specified memory buffer. This does no caching of the buffer and takes 338 /// ownership of the MemoryBuffer, so only pass a MemoryBuffer to this once. 339 FileID createFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) { 340 return createFileID(createMemBufferContentCache(Buffer), SourceLocation(), 341 SrcMgr::C_User); 342 } 343 344 /// createMainFileIDForMembuffer - Create the FileID for a memory buffer 345 /// that will represent the FileID for the main source. One example 346 /// of when this would be used is when the main source is read from STDIN. 347 FileID createMainFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) { 348 assert(MainFileID.isInvalid() && "MainFileID already set!"); 349 MainFileID = createFileIDForMemBuffer(Buffer); 350 return MainFileID; 351 } 352 353 /// createInstantiationLoc - Return a new SourceLocation that encodes the fact 354 /// that a token at Loc should actually be referenced from InstantiationLoc. 355 /// TokLength is the length of the token being instantiated. 356 SourceLocation createInstantiationLoc(SourceLocation Loc, 357 SourceLocation InstantiationLoc, 358 unsigned TokLength); 359 360 //===--------------------------------------------------------------------===// 361 // FileID manipulation methods. 362 //===--------------------------------------------------------------------===// 363 364 /// getBuffer - Return the buffer for the specified FileID. 365 /// 366 const llvm::MemoryBuffer *getBuffer(FileID FID) const { 367 return getSLocEntry(FID).getFile().getContentCache()->getBuffer(); 368 } 369 370 /// getFileEntryForID - Returns the FileEntry record for the provided FileID. 371 const FileEntry *getFileEntryForID(FileID FID) const { 372 return getSLocEntry(FID).getFile().getContentCache()->Entry; 373 } 374 375 /// getBufferData - Return a pointer to the start and end of the source buffer 376 /// data for the specified FileID. 377 std::pair<const char*, const char*> getBufferData(FileID FID) const; 378 379 380 //===--------------------------------------------------------------------===// 381 // SourceLocation manipulation methods. 382 //===--------------------------------------------------------------------===// 383 384 /// getFileIDSlow - Return the FileID for a SourceLocation. This is a very 385 /// hot method that is used for all SourceManager queries that start with a 386 /// SourceLocation object. It is responsible for finding the entry in 387 /// SLocEntryTable which contains the specified location. 388 /// 389 FileID getFileID(SourceLocation SpellingLoc) const { 390 unsigned SLocOffset = SpellingLoc.getOffset(); 391 392 // If our one-entry cache covers this offset, just return it. 393 if (isOffsetInFileID(LastFileIDLookup, SLocOffset)) 394 return LastFileIDLookup; 395 396 return getFileIDSlow(SLocOffset); 397 } 398 399 /// getLocForStartOfFile - Return the source location corresponding to the 400 /// first byte of the specified file. 401 SourceLocation getLocForStartOfFile(FileID FID) const { 402 assert(FID.ID < SLocEntryTable.size() && SLocEntryTable[FID.ID].isFile()); 403 unsigned FileOffset = SLocEntryTable[FID.ID].getOffset(); 404 return SourceLocation::getFileLoc(FileOffset); 405 } 406 407 /// Given a SourceLocation object, return the instantiation location 408 /// referenced by the ID. 409 SourceLocation getInstantiationLoc(SourceLocation Loc) const { 410 // Handle the non-mapped case inline, defer to out of line code to handle 411 // instantiations. 412 if (Loc.isFileID()) return Loc; 413 return getInstantiationLocSlowCase(Loc); 414 } 415 416 /// getSpellingLoc - Given a SourceLocation object, return the spelling 417 /// location referenced by the ID. This is the place where the characters 418 /// that make up the lexed token can be found. 419 SourceLocation getSpellingLoc(SourceLocation Loc) const { 420 // Handle the non-mapped case inline, defer to out of line code to handle 421 // instantiations. 422 if (Loc.isFileID()) return Loc; 423 return getSpellingLocSlowCase(Loc); 424 } 425 426 /// getDecomposedLoc - Decompose the specified location into a raw FileID + 427 /// Offset pair. The first element is the FileID, the second is the 428 /// offset from the start of the buffer of the location. 429 std::pair<FileID, unsigned> getDecomposedLoc(SourceLocation Loc) const { 430 FileID FID = getFileID(Loc); 431 return std::make_pair(FID, Loc.getOffset()-getSLocEntry(FID).getOffset()); 432 } 433 434 /// getDecomposedInstantiationLoc - Decompose the specified location into a 435 /// raw FileID + Offset pair. If the location is an instantiation record, 436 /// walk through it until we find the final location instantiated. 437 std::pair<FileID, unsigned> 438 getDecomposedInstantiationLoc(SourceLocation Loc) const { 439 FileID FID = getFileID(Loc); 440 const SrcMgr::SLocEntry *E = &getSLocEntry(FID); 441 442 unsigned Offset = Loc.getOffset()-E->getOffset(); 443 if (Loc.isFileID()) 444 return std::make_pair(FID, Offset); 445 446 return getDecomposedInstantiationLocSlowCase(E, Offset); 447 } 448 449 /// getDecomposedSpellingLoc - Decompose the specified location into a raw 450 /// FileID + Offset pair. If the location is an instantiation record, walk 451 /// through it until we find its spelling record. 452 std::pair<FileID, unsigned> 453 getDecomposedSpellingLoc(SourceLocation Loc) const { 454 FileID FID = getFileID(Loc); 455 const SrcMgr::SLocEntry *E = &getSLocEntry(FID); 456 457 unsigned Offset = Loc.getOffset()-E->getOffset(); 458 if (Loc.isFileID()) 459 return std::make_pair(FID, Offset); 460 return getDecomposedSpellingLocSlowCase(E, Offset); 461 } 462 463 /// getFileOffset - This method returns the offset from the start 464 /// of the file that the specified SourceLocation represents. This is not very 465 /// meaningful for a macro ID. 466 unsigned getFileOffset(SourceLocation SpellingLoc) const { 467 return getDecomposedLoc(SpellingLoc).second; 468 } 469 470 471 //===--------------------------------------------------------------------===// 472 // Queries about the code at a SourceLocation. 473 //===--------------------------------------------------------------------===// 474 475 /// getCharacterData - Return a pointer to the start of the specified location 476 /// in the appropriate spelling MemoryBuffer. 477 const char *getCharacterData(SourceLocation SL) const; 478 479 /// getColumnNumber - Return the column # for the specified file position. 480 /// This is significantly cheaper to compute than the line number. This 481 /// returns zero if the column number isn't known. This may only be called on 482 /// a file sloc, so you must choose a spelling or instantiation location 483 /// before calling this method. 484 unsigned getColumnNumber(SourceLocation Loc) const; 485 486 unsigned getSpellingColumnNumber(SourceLocation Loc) const { 487 return getColumnNumber(getSpellingLoc(Loc)); 488 } 489 unsigned getInstantiationColumnNumber(SourceLocation Loc) const { 490 return getColumnNumber(getInstantiationLoc(Loc)); 491 } 492 493 494 /// getLineNumber - Given a SourceLocation, return the spelling line number 495 /// for the position indicated. This requires building and caching a table of 496 /// line offsets for the MemoryBuffer, so this is not cheap: use only when 497 /// about to emit a diagnostic. 498 unsigned getLineNumber(SourceLocation Loc) const; 499 500 unsigned getInstantiationLineNumber(SourceLocation Loc) const { 501 return getLineNumber(getInstantiationLoc(Loc)); 502 } 503 unsigned getSpellingLineNumber(SourceLocation Loc) const { 504 return getLineNumber(getSpellingLoc(Loc)); 505 } 506 507 // FIXME: This should handle #line. 508 SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const { 509 FileID FID = getFileID(getSpellingLoc(Loc)); 510 return getSLocEntry(FID).getFile().getFileCharacteristic(); 511 } 512 513 /// getPresumedLoc - This method returns the "presumed" location of a 514 /// SourceLocation specifies. A "presumed location" can be modified by #line 515 /// or GNU line marker directives. This provides a view on the data that a 516 /// user should see in diagnostics, for example. 517 /// 518 /// Note that a presumed location is always given as the instantiation point 519 /// of an instantiation location, not at the spelling location. 520 PresumedLoc getPresumedLoc(SourceLocation Loc) const; 521 522 523 524 /// isFromSameFile - Returns true if both SourceLocations correspond to 525 /// the same file. 526 bool isFromSameFile(SourceLocation Loc1, SourceLocation Loc2) const { 527 return getFileID(Loc1) == getFileID(Loc2); 528 } 529 530 /// isFromMainFile - Returns true if the file of provided SourceLocation is 531 /// the main file. 532 bool isFromMainFile(SourceLocation Loc) const { 533 return getFileID(Loc) == getMainFileID(); 534 } 535 536 /// isInSystemHeader - Returns if a SourceLocation is in a system header. 537 bool isInSystemHeader(SourceLocation Loc) const { 538 return getFileCharacteristic(Loc) != SrcMgr::C_User; 539 } 540 541 //===--------------------------------------------------------------------===// 542 // Line Table Manipulation Routines 543 //===--------------------------------------------------------------------===// 544 545 /// getLineTableFilenameID - Return the uniqued ID for the specified filename. 546 /// 547 unsigned getLineTableFilenameID(const char *Ptr, unsigned Len); 548 549 550 //===--------------------------------------------------------------------===// 551 // Other miscellaneous methods. 552 //===--------------------------------------------------------------------===// 553 554 // Iterators over FileInfos. 555 typedef std::set<SrcMgr::ContentCache>::const_iterator fileinfo_iterator; 556 fileinfo_iterator fileinfo_begin() const { return FileInfos.begin(); } 557 fileinfo_iterator fileinfo_end() const { return FileInfos.end(); } 558 559 /// PrintStats - Print statistics to stderr. 560 /// 561 void PrintStats() const; 562 563 /// Emit - Emit this SourceManager to Bitcode. 564 void Emit(llvm::Serializer& S) const; 565 566 /// Read - Reconstitute a SourceManager from Bitcode. 567 static SourceManager* CreateAndRegister(llvm::Deserializer& S, 568 FileManager &FMgr); 569 570private: 571 friend struct SrcMgr::ContentCache; // Used for deserialization. 572 573 /// isOffsetInFileID - Return true if the specified FileID contains the 574 /// specified SourceLocation offset. This is a very hot method. 575 inline bool isOffsetInFileID(FileID FID, unsigned SLocOffset) const { 576 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID); 577 // If the entry is after the offset, it can't contain it. 578 if (SLocOffset < Entry.getOffset()) return false; 579 580 // If this is the last entry than it does. Otherwise, the entry after it 581 // has to not include it. 582 if (FID.ID+1 == SLocEntryTable.size()) return true; 583 return SLocOffset < SLocEntryTable[FID.ID+1].getOffset(); 584 } 585 586 /// createFileID - Create a new fileID for the specified ContentCache and 587 /// include position. This works regardless of whether the ContentCache 588 /// corresponds to a file or some other input source. 589 FileID createFileID(const SrcMgr::ContentCache* File, 590 SourceLocation IncludePos, 591 SrcMgr::CharacteristicKind DirCharacter); 592 593 const SrcMgr::ContentCache * 594 getOrCreateContentCache(const FileEntry *SourceFile); 595 596 /// createMemBufferContentCache - Create a new ContentCache for the specified 597 /// memory buffer. 598 const SrcMgr::ContentCache* 599 createMemBufferContentCache(const llvm::MemoryBuffer *Buf); 600 601 const SrcMgr::SLocEntry &getSLocEntry(FileID FID) const { 602 assert(FID.ID < SLocEntryTable.size() && "Invalid id"); 603 return SLocEntryTable[FID.ID]; 604 } 605 606 FileID getFileIDSlow(unsigned SLocOffset) const; 607 608 SourceLocation getInstantiationLocSlowCase(SourceLocation Loc) const; 609 SourceLocation getSpellingLocSlowCase(SourceLocation Loc) const; 610 611 std::pair<FileID, unsigned> 612 getDecomposedInstantiationLocSlowCase(const SrcMgr::SLocEntry *E, 613 unsigned Offset) const; 614 std::pair<FileID, unsigned> 615 getDecomposedSpellingLocSlowCase(const SrcMgr::SLocEntry *E, 616 unsigned Offset) const; 617}; 618 619 620} // end namespace clang 621 622#endif 623