SourceManager.h revision e7fb48466afcbf2c4ccdfa658824282fdc3c512c
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/Allocator.h" 20#include "llvm/Support/DataTypes.h" 21#include "llvm/ADT/DenseMap.h" 22#include <vector> 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 bump pointer allocated array of offsets for each 65 /// source line. This is lazily computed. This is owned by the 66 /// SourceManager BumpPointerAllocator object. 67 unsigned *SourceLineCache; 68 69 /// NumLines - The number of lines in this ContentCache. This is only valid 70 /// if SourceLineCache is non-null. 71 unsigned NumLines; 72 73 /// getBuffer - Returns the memory buffer for the associated content. 74 const llvm::MemoryBuffer *getBuffer() const; 75 76 /// getSize - Returns the size of the content encapsulated by this 77 /// ContentCache. This can be the size of the source file or the size of an 78 /// arbitrary scratch buffer. If the ContentCache encapsulates a source 79 /// file this size is retrieved from the file's FileEntry. 80 unsigned getSize() const; 81 82 /// getSizeBytesMapped - Returns the number of bytes actually mapped for 83 /// this ContentCache. This can be 0 if the MemBuffer was not actually 84 /// instantiated. 85 unsigned getSizeBytesMapped() const; 86 87 void setBuffer(const llvm::MemoryBuffer *B) { 88 assert(!Buffer && "MemoryBuffer already set."); 89 Buffer = B; 90 } 91 92 ContentCache(const FileEntry *Ent = 0) 93 : Buffer(0), Entry(Ent), SourceLineCache(0), NumLines(0) {} 94 95 ~ContentCache(); 96 97 /// The copy ctor does not allow copies where source object has either 98 /// a non-NULL Buffer or SourceLineCache. Ownership of allocated memory 99 /// is not transfered, so this is a logical error. 100 ContentCache(const ContentCache &RHS) : Buffer(0), SourceLineCache(0) { 101 Entry = RHS.Entry; 102 103 assert (RHS.Buffer == 0 && RHS.SourceLineCache == 0 104 && "Passed ContentCache object cannot own a buffer."); 105 106 NumLines = RHS.NumLines; 107 } 108 109 /// Emit - Emit this ContentCache to Bitcode. 110 void Emit(llvm::Serializer &S) const; 111 112 /// ReadToSourceManager - Reconstitute a ContentCache from Bitcode 113 // and store it in the specified SourceManager. 114 static void ReadToSourceManager(llvm::Deserializer &D, SourceManager &SM, 115 FileManager *FMgr, std::vector<char> &Buf); 116 117 private: 118 // Disable assignments. 119 ContentCache &operator=(const ContentCache& RHS); 120 }; 121 122 /// FileInfo - Information about a FileID, basically just the logical file 123 /// that it represents and include stack information. 124 /// 125 /// Each FileInfo has include stack information, indicating where it came 126 /// from. This information encodes the #include chain that a token was 127 /// instantiated from. The main include file has an invalid IncludeLoc. 128 /// 129 /// FileInfos contain a "ContentCache *", with the contents of the file. 130 /// 131 class FileInfo { 132 /// IncludeLoc - The location of the #include that brought in this file. 133 /// This is an invalid SLOC for the main file (top of the #include chain). 134 unsigned IncludeLoc; // Really a SourceLocation 135 136 /// Data - This contains the ContentCache* and the bits indicating the 137 /// characteristic of the file and whether it has #line info, all bitmangled 138 /// together. 139 uintptr_t Data; 140 public: 141 /// get - Return a FileInfo object. 142 static FileInfo get(SourceLocation IL, const ContentCache *Con, 143 CharacteristicKind FileCharacter) { 144 FileInfo X; 145 X.IncludeLoc = IL.getRawEncoding(); 146 X.Data = (uintptr_t)Con; 147 assert((X.Data & 7) == 0 &&"ContentCache pointer insufficiently aligned"); 148 assert((unsigned)FileCharacter < 4 && "invalid file character"); 149 X.Data |= (unsigned)FileCharacter; 150 return X; 151 } 152 153 SourceLocation getIncludeLoc() const { 154 return SourceLocation::getFromRawEncoding(IncludeLoc); 155 } 156 const ContentCache* getContentCache() const { 157 return reinterpret_cast<const ContentCache*>(Data & ~7UL); 158 } 159 160 /// getCharacteristic - Return whether this is a system header or not. 161 CharacteristicKind getFileCharacteristic() const { 162 return (CharacteristicKind)(Data & 3); 163 } 164 165 /// hasLineDirectives - Return true if this FileID has #line directives in 166 /// it. 167 bool hasLineDirectives() const { return (Data & 4) != 0; } 168 169 /// setHasLineDirectives - Set the flag that indicates that this FileID has 170 /// line table entries associated with it. 171 void setHasLineDirectives() { 172 Data |= 4; 173 } 174 }; 175 176 /// InstantiationInfo - Each InstantiationInfo encodes the Instantiation 177 /// location - where the token was ultimately instantiated, and the 178 /// SpellingLoc - where the actual character data for the token came from. 179 class InstantiationInfo { 180 // Really these are all SourceLocations. 181 182 /// SpellingLoc - Where the spelling for the token can be found. 183 unsigned SpellingLoc; 184 185 /// InstantiationLocStart/InstantiationLocEnd - In a macro expansion, these 186 /// indicate the start and end of the instantiation. In object-line macros, 187 /// these will be the same. In a function-like macro instantiation, the 188 /// start will be the identifier and the end will be the ')'. 189 unsigned InstantiationLocStart, InstantiationLocEnd; 190 public: 191 SourceLocation getSpellingLoc() const { 192 return SourceLocation::getFromRawEncoding(SpellingLoc); 193 } 194 SourceLocation getInstantiationLocStart() const { 195 return SourceLocation::getFromRawEncoding(InstantiationLocStart); 196 } 197 SourceLocation getInstantiationLocEnd() const { 198 return SourceLocation::getFromRawEncoding(InstantiationLocEnd); 199 } 200 201 std::pair<SourceLocation,SourceLocation> getInstantiationLocRange() const { 202 return std::make_pair(getInstantiationLocStart(), 203 getInstantiationLocEnd()); 204 } 205 206 /// get - Return a InstantiationInfo for an expansion. IL specifies 207 /// the instantiation location (where the macro is expanded), and SL 208 /// specifies the spelling location (where the characters from the token 209 /// come from). IL and PL can both refer to normal File SLocs or 210 /// instantiation locations. 211 static InstantiationInfo get(SourceLocation ILStart, SourceLocation ILEnd, 212 SourceLocation SL) { 213 InstantiationInfo X; 214 X.SpellingLoc = SL.getRawEncoding(); 215 X.InstantiationLocStart = ILStart.getRawEncoding(); 216 X.InstantiationLocEnd = ILEnd.getRawEncoding(); 217 return X; 218 } 219 }; 220 221 /// SLocEntry - This is a discriminated union of FileInfo and 222 /// InstantiationInfo. SourceManager keeps an array of these objects, and 223 /// they are uniquely identified by the FileID datatype. 224 class SLocEntry { 225 unsigned Offset; // low bit is set for instantiation info. 226 union { 227 FileInfo File; 228 InstantiationInfo Instantiation; 229 }; 230 public: 231 unsigned getOffset() const { return Offset >> 1; } 232 233 bool isInstantiation() const { return Offset & 1; } 234 bool isFile() const { return !isInstantiation(); } 235 236 const FileInfo &getFile() const { 237 assert(isFile() && "Not a file SLocEntry!"); 238 return File; 239 } 240 241 const InstantiationInfo &getInstantiation() const { 242 assert(isInstantiation() && "Not an instantiation SLocEntry!"); 243 return Instantiation; 244 } 245 246 static SLocEntry get(unsigned Offset, const FileInfo &FI) { 247 SLocEntry E; 248 E.Offset = Offset << 1; 249 E.File = FI; 250 return E; 251 } 252 253 static SLocEntry get(unsigned Offset, const InstantiationInfo &II) { 254 SLocEntry E; 255 E.Offset = (Offset << 1) | 1; 256 E.Instantiation = II; 257 return E; 258 } 259 }; 260} // end SrcMgr namespace. 261 262/// SourceManager - This file handles loading and caching of source files into 263/// memory. This object owns the MemoryBuffer objects for all of the loaded 264/// files and assigns unique FileID's for each unique #include chain. 265/// 266/// The SourceManager can be queried for information about SourceLocation 267/// objects, turning them into either spelling or instantiation locations. 268/// Spelling locations represent where the bytes corresponding to a token came 269/// from and instantiation locations represent where the location is in the 270/// user's view. In the case of a macro expansion, for example, the spelling 271/// location indicates where the expanded token came from and the instantiation 272/// location specifies where it was expanded. 273class SourceManager { 274 mutable llvm::BumpPtrAllocator ContentCacheAlloc; 275 276 /// FileInfos - Memoized information about all of the files tracked by this 277 /// SourceManager. This set allows us to merge ContentCache entries based 278 /// on their FileEntry*. All ContentCache objects will thus have unique, 279 /// non-null, FileEntry pointers. 280 llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*> FileInfos; 281 282 /// MemBufferInfos - Information about various memory buffers that we have 283 /// read in. All FileEntry* within the stored ContentCache objects are NULL, 284 /// as they do not refer to a file. 285 std::vector<SrcMgr::ContentCache*> MemBufferInfos; 286 287 /// SLocEntryTable - This is an array of SLocEntry's that we have created. 288 /// FileID is an index into this vector. This array is sorted by the offset. 289 std::vector<SrcMgr::SLocEntry> SLocEntryTable; 290 /// NextOffset - This is the next available offset that a new SLocEntry can 291 /// start at. It is SLocEntryTable.back().getOffset()+size of back() entry. 292 unsigned NextOffset; 293 294 /// LastFileIDLookup - This is a one-entry cache to speed up getFileID. 295 /// LastFileIDLookup records the last FileID looked up or created, because it 296 /// is very common to look up many tokens from the same file. 297 mutable FileID LastFileIDLookup; 298 299 /// LineTable - This holds information for #line directives. It is referenced 300 /// by indices from SLocEntryTable. 301 LineTableInfo *LineTable; 302 303 /// LastLineNo - These ivars serve as a cache used in the getLineNumber 304 /// method which is used to speedup getLineNumber calls to nearby locations. 305 mutable FileID LastLineNoFileIDQuery; 306 mutable SrcMgr::ContentCache *LastLineNoContentCache; 307 mutable unsigned LastLineNoFilePos; 308 mutable unsigned LastLineNoResult; 309 310 /// MainFileID - The file ID for the main source file of the translation unit. 311 FileID MainFileID; 312 313 // Statistics for -print-stats. 314 mutable unsigned NumLinearScans, NumBinaryProbes; 315 316 // SourceManager doesn't support copy construction. 317 explicit SourceManager(const SourceManager&); 318 void operator=(const SourceManager&); 319public: 320 SourceManager() : LineTable(0), NumLinearScans(0), NumBinaryProbes(0) { 321 clearIDTables(); 322 } 323 ~SourceManager(); 324 325 void clearIDTables(); 326 327 //===--------------------------------------------------------------------===// 328 // MainFileID creation and querying methods. 329 //===--------------------------------------------------------------------===// 330 331 /// getMainFileID - Returns the FileID of the main source file. 332 FileID getMainFileID() const { return MainFileID; } 333 334 /// createMainFileID - Create the FileID for the main source file. 335 FileID createMainFileID(const FileEntry *SourceFile, 336 SourceLocation IncludePos) { 337 assert(MainFileID.isInvalid() && "MainFileID already set!"); 338 MainFileID = createFileID(SourceFile, IncludePos, SrcMgr::C_User); 339 return MainFileID; 340 } 341 342 //===--------------------------------------------------------------------===// 343 // Methods to create new FileID's and instantiations. 344 //===--------------------------------------------------------------------===// 345 346 /// createFileID - Create a new FileID that represents the specified file 347 /// being #included from the specified IncludePosition. This returns 0 on 348 /// error and translates NULL into standard input. 349 FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, 350 SrcMgr::CharacteristicKind FileCharacter) { 351 const SrcMgr::ContentCache *IR = getOrCreateContentCache(SourceFile); 352 if (IR == 0) return FileID(); // Error opening file? 353 return createFileID(IR, IncludePos, FileCharacter); 354 } 355 356 /// createFileIDForMemBuffer - Create a new FileID that represents the 357 /// specified memory buffer. This does no caching of the buffer and takes 358 /// ownership of the MemoryBuffer, so only pass a MemoryBuffer to this once. 359 FileID createFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) { 360 return createFileID(createMemBufferContentCache(Buffer), SourceLocation(), 361 SrcMgr::C_User); 362 } 363 364 /// createMainFileIDForMembuffer - Create the FileID for a memory buffer 365 /// that will represent the FileID for the main source. One example 366 /// of when this would be used is when the main source is read from STDIN. 367 FileID createMainFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) { 368 assert(MainFileID.isInvalid() && "MainFileID already set!"); 369 MainFileID = createFileIDForMemBuffer(Buffer); 370 return MainFileID; 371 } 372 373 /// createInstantiationLoc - Return a new SourceLocation that encodes the fact 374 /// that a token at Loc should actually be referenced from InstantiationLoc. 375 /// TokLength is the length of the token being instantiated. 376 SourceLocation createInstantiationLoc(SourceLocation Loc, 377 SourceLocation InstantiationLocStart, 378 SourceLocation InstantiationLocEnd, 379 unsigned TokLength); 380 381 //===--------------------------------------------------------------------===// 382 // FileID manipulation methods. 383 //===--------------------------------------------------------------------===// 384 385 /// getBuffer - Return the buffer for the specified FileID. 386 /// 387 const llvm::MemoryBuffer *getBuffer(FileID FID) const { 388 return getSLocEntry(FID).getFile().getContentCache()->getBuffer(); 389 } 390 391 /// getFileEntryForID - Returns the FileEntry record for the provided FileID. 392 const FileEntry *getFileEntryForID(FileID FID) const { 393 return getSLocEntry(FID).getFile().getContentCache()->Entry; 394 } 395 396 /// getBufferData - Return a pointer to the start and end of the source buffer 397 /// data for the specified FileID. 398 std::pair<const char*, const char*> getBufferData(FileID FID) const; 399 400 401 //===--------------------------------------------------------------------===// 402 // SourceLocation manipulation methods. 403 //===--------------------------------------------------------------------===// 404 405 /// getFileIDSlow - Return the FileID for a SourceLocation. This is a very 406 /// hot method that is used for all SourceManager queries that start with a 407 /// SourceLocation object. It is responsible for finding the entry in 408 /// SLocEntryTable which contains the specified location. 409 /// 410 FileID getFileID(SourceLocation SpellingLoc) const { 411 unsigned SLocOffset = SpellingLoc.getOffset(); 412 413 // If our one-entry cache covers this offset, just return it. 414 if (isOffsetInFileID(LastFileIDLookup, SLocOffset)) 415 return LastFileIDLookup; 416 417 return getFileIDSlow(SLocOffset); 418 } 419 420 /// getLocForStartOfFile - Return the source location corresponding to the 421 /// first byte of the specified file. 422 SourceLocation getLocForStartOfFile(FileID FID) const { 423 assert(FID.ID < SLocEntryTable.size() && SLocEntryTable[FID.ID].isFile()); 424 unsigned FileOffset = SLocEntryTable[FID.ID].getOffset(); 425 return SourceLocation::getFileLoc(FileOffset); 426 } 427 428 /// Given a SourceLocation object, return the instantiation location 429 /// referenced by the ID. 430 SourceLocation getInstantiationLoc(SourceLocation Loc) const { 431 // Handle the non-mapped case inline, defer to out of line code to handle 432 // instantiations. 433 if (Loc.isFileID()) return Loc; 434 return getInstantiationLocSlowCase(Loc); 435 } 436 437 /// getImmediateInstantiationRange - Loc is required to be an instantiation 438 /// location. Return the start/end of the instantiation information. 439 std::pair<SourceLocation,SourceLocation> 440 getImmediateInstantiationRange(SourceLocation Loc) const; 441 442 /// getSpellingLoc - Given a SourceLocation object, return the spelling 443 /// location referenced by the ID. This is the place where the characters 444 /// that make up the lexed token can be found. 445 SourceLocation getSpellingLoc(SourceLocation Loc) const { 446 // Handle the non-mapped case inline, defer to out of line code to handle 447 // instantiations. 448 if (Loc.isFileID()) return Loc; 449 return getSpellingLocSlowCase(Loc); 450 } 451 452 /// getDecomposedLoc - Decompose the specified location into a raw FileID + 453 /// Offset pair. The first element is the FileID, the second is the 454 /// offset from the start of the buffer of the location. 455 std::pair<FileID, unsigned> getDecomposedLoc(SourceLocation Loc) const { 456 FileID FID = getFileID(Loc); 457 return std::make_pair(FID, Loc.getOffset()-getSLocEntry(FID).getOffset()); 458 } 459 460 /// getDecomposedInstantiationLoc - Decompose the specified location into a 461 /// raw FileID + Offset pair. If the location is an instantiation record, 462 /// walk through it until we find the final location instantiated. 463 std::pair<FileID, unsigned> 464 getDecomposedInstantiationLoc(SourceLocation Loc) const { 465 FileID FID = getFileID(Loc); 466 const SrcMgr::SLocEntry *E = &getSLocEntry(FID); 467 468 unsigned Offset = Loc.getOffset()-E->getOffset(); 469 if (Loc.isFileID()) 470 return std::make_pair(FID, Offset); 471 472 return getDecomposedInstantiationLocSlowCase(E, Offset); 473 } 474 475 /// getDecomposedSpellingLoc - Decompose the specified location into a raw 476 /// FileID + Offset pair. If the location is an instantiation record, walk 477 /// through it until we find its spelling record. 478 std::pair<FileID, unsigned> 479 getDecomposedSpellingLoc(SourceLocation Loc) const { 480 FileID FID = getFileID(Loc); 481 const SrcMgr::SLocEntry *E = &getSLocEntry(FID); 482 483 unsigned Offset = Loc.getOffset()-E->getOffset(); 484 if (Loc.isFileID()) 485 return std::make_pair(FID, Offset); 486 return getDecomposedSpellingLocSlowCase(E, Offset); 487 } 488 489 /// getFileOffset - This method returns the offset from the start 490 /// of the file that the specified SourceLocation represents. This is not very 491 /// meaningful for a macro ID. 492 unsigned getFileOffset(SourceLocation SpellingLoc) const { 493 return getDecomposedLoc(SpellingLoc).second; 494 } 495 496 497 //===--------------------------------------------------------------------===// 498 // Queries about the code at a SourceLocation. 499 //===--------------------------------------------------------------------===// 500 501 /// getCharacterData - Return a pointer to the start of the specified location 502 /// in the appropriate spelling MemoryBuffer. 503 const char *getCharacterData(SourceLocation SL) const; 504 505 /// getColumnNumber - Return the column # for the specified file position. 506 /// This is significantly cheaper to compute than the line number. This 507 /// returns zero if the column number isn't known. This may only be called on 508 /// a file sloc, so you must choose a spelling or instantiation location 509 /// before calling this method. 510 unsigned getColumnNumber(FileID FID, unsigned FilePos) const; 511 unsigned getSpellingColumnNumber(SourceLocation Loc) const; 512 unsigned getInstantiationColumnNumber(SourceLocation Loc) const; 513 514 515 /// getLineNumber - Given a SourceLocation, return the spelling line number 516 /// for the position indicated. This requires building and caching a table of 517 /// line offsets for the MemoryBuffer, so this is not cheap: use only when 518 /// about to emit a diagnostic. 519 unsigned getLineNumber(FileID FID, unsigned FilePos) const; 520 521 unsigned getInstantiationLineNumber(SourceLocation Loc) const; 522 unsigned getSpellingLineNumber(SourceLocation Loc) const; 523 524 /// getFileCharacteristic - return the file characteristic of the specified 525 /// source location, indicating whether this is a normal file, a system 526 /// header, or an "implicit extern C" system header. 527 /// 528 /// This state can be modified with flags on GNU linemarker directives like: 529 /// # 4 "foo.h" 3 530 /// which changes all source locations in the current file after that to be 531 /// considered to be from a system header. 532 SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const; 533 534 /// getPresumedLoc - This method returns the "presumed" location of a 535 /// SourceLocation specifies. A "presumed location" can be modified by #line 536 /// or GNU line marker directives. This provides a view on the data that a 537 /// user should see in diagnostics, for example. 538 /// 539 /// Note that a presumed location is always given as the instantiation point 540 /// of an instantiation location, not at the spelling location. 541 PresumedLoc getPresumedLoc(SourceLocation Loc) const; 542 543 544 545 /// isFromSameFile - Returns true if both SourceLocations correspond to 546 /// the same file. 547 bool isFromSameFile(SourceLocation Loc1, SourceLocation Loc2) const { 548 return getFileID(Loc1) == getFileID(Loc2); 549 } 550 551 /// isFromMainFile - Returns true if the file of provided SourceLocation is 552 /// the main file. 553 bool isFromMainFile(SourceLocation Loc) const { 554 return getFileID(Loc) == getMainFileID(); 555 } 556 557 /// isInSystemHeader - Returns if a SourceLocation is in a system header. 558 bool isInSystemHeader(SourceLocation Loc) const { 559 return getFileCharacteristic(Loc) != SrcMgr::C_User; 560 } 561 562 //===--------------------------------------------------------------------===// 563 // Line Table Manipulation Routines 564 //===--------------------------------------------------------------------===// 565 566 /// getLineTableFilenameID - Return the uniqued ID for the specified filename. 567 /// 568 unsigned getLineTableFilenameID(const char *Ptr, unsigned Len); 569 570 /// AddLineNote - Add a line note to the line table for the FileID and offset 571 /// specified by Loc. If FilenameID is -1, it is considered to be 572 /// unspecified. 573 void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID); 574 void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID, 575 bool IsFileEntry, bool IsFileExit, 576 bool IsSystemHeader, bool IsExternCHeader); 577 578 //===--------------------------------------------------------------------===// 579 // Other miscellaneous methods. 580 //===--------------------------------------------------------------------===// 581 582 // Iterators over FileInfos. 583 typedef llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*> 584 ::const_iterator fileinfo_iterator; 585 fileinfo_iterator fileinfo_begin() const { return FileInfos.begin(); } 586 fileinfo_iterator fileinfo_end() const { return FileInfos.end(); } 587 588 /// PrintStats - Print statistics to stderr. 589 /// 590 void PrintStats() const; 591 592 /// Emit - Emit this SourceManager to Bitcode. 593 void Emit(llvm::Serializer& S) const; 594 595 /// Read - Reconstitute a SourceManager from Bitcode. 596 static SourceManager* CreateAndRegister(llvm::Deserializer& S, 597 FileManager &FMgr); 598 599private: 600 friend class SrcMgr::ContentCache; // Used for deserialization. 601 602 /// isOffsetInFileID - Return true if the specified FileID contains the 603 /// specified SourceLocation offset. This is a very hot method. 604 inline bool isOffsetInFileID(FileID FID, unsigned SLocOffset) const { 605 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID); 606 // If the entry is after the offset, it can't contain it. 607 if (SLocOffset < Entry.getOffset()) return false; 608 609 // If this is the last entry than it does. Otherwise, the entry after it 610 // has to not include it. 611 if (FID.ID+1 == SLocEntryTable.size()) return true; 612 return SLocOffset < SLocEntryTable[FID.ID+1].getOffset(); 613 } 614 615 /// createFileID - Create a new fileID for the specified ContentCache and 616 /// include position. This works regardless of whether the ContentCache 617 /// corresponds to a file or some other input source. 618 FileID createFileID(const SrcMgr::ContentCache* File, 619 SourceLocation IncludePos, 620 SrcMgr::CharacteristicKind DirCharacter); 621 622 const SrcMgr::ContentCache * 623 getOrCreateContentCache(const FileEntry *SourceFile); 624 625 /// createMemBufferContentCache - Create a new ContentCache for the specified 626 /// memory buffer. 627 const SrcMgr::ContentCache* 628 createMemBufferContentCache(const llvm::MemoryBuffer *Buf); 629 630 const SrcMgr::SLocEntry &getSLocEntry(FileID FID) const { 631 assert(FID.ID < SLocEntryTable.size() && "Invalid id"); 632 return SLocEntryTable[FID.ID]; 633 } 634 635 FileID getFileIDSlow(unsigned SLocOffset) const; 636 637 SourceLocation getInstantiationLocSlowCase(SourceLocation Loc) const; 638 SourceLocation getSpellingLocSlowCase(SourceLocation Loc) const; 639 640 std::pair<FileID, unsigned> 641 getDecomposedInstantiationLocSlowCase(const SrcMgr::SLocEntry *E, 642 unsigned Offset) const; 643 std::pair<FileID, unsigned> 644 getDecomposedSpellingLocSlowCase(const SrcMgr::SLocEntry *E, 645 unsigned Offset) const; 646}; 647 648 649} // end namespace clang 650 651#endif 652