1 //===--- SourceManager.h - Track and cache source files ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the SourceManager interface.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_SOURCEMANAGER_H
15 #define LLVM_CLANG_SOURCEMANAGER_H
17 #include "clang/Basic/LLVM.h"
18 #include "clang/Basic/SourceLocation.h"
19 #include "llvm/Support/Allocator.h"
20 #include "llvm/Support/DataTypes.h"
21 #include "llvm/ADT/PointerIntPair.h"
22 #include "llvm/ADT/PointerUnion.h"
23 #include "llvm/ADT/IntrusiveRefCntPtr.h"
24 #include "llvm/ADT/DenseMap.h"
25 #include "llvm/Support/MemoryBuffer.h"
32 class DiagnosticsEngine;
41 /// There are three different types of locations in a file: a spelling
42 /// location, an expansion location, and a presumed location.
44 /// Given an example of:
45 /// #define min(x, y) x < y ? x : y
47 /// and then later on a use of min:
51 /// The expansion location is the line in the source code where the macro
52 /// was expanded (the return statement), the spelling location is the
53 /// location in the source where the macro was originally defined,
54 /// and the presumed location is where the line directive states that
55 /// the line is 17, or any other line.
57 /// SrcMgr - Public enums and private classes that are part of the
58 /// SourceManager implementation.
61 /// CharacteristicKind - This is used to represent whether a file or directory
62 /// holds normal user code, system code, or system code which is implicitly
63 /// 'extern "C"' in C++ mode. Entire directories can be tagged with this
64 /// (this is maintained by DirectoryLookup and friends) as can specific
65 /// FileInfos when a #pragma system_header is seen or various other cases.
67 enum CharacteristicKind {
68 C_User, C_System, C_ExternCSystem
71 /// ContentCache - One instance of this struct is kept for every file
72 /// loaded or used. This object owns the MemoryBuffer object.
75 /// \brief Whether the buffer is invalid.
77 /// \brief Whether the buffer should not be freed on destruction.
81 /// Buffer - The actual buffer containing the characters from the input
82 /// file. This is owned by the ContentCache object.
83 /// The bits indicate indicates whether the buffer is invalid.
84 mutable llvm::PointerIntPair<const llvm::MemoryBuffer *, 2> Buffer;
87 /// Reference to the file entry representing this ContentCache.
88 /// This reference does not own the FileEntry object.
89 /// It is possible for this to be NULL if
90 /// the ContentCache encapsulates an imaginary text buffer.
91 const FileEntry *OrigEntry;
93 /// \brief References the file which the contents were actually loaded from.
94 /// Can be different from 'Entry' if we overridden the contents of one file
95 /// with the contents of another file.
96 const FileEntry *ContentsEntry;
98 /// SourceLineCache - A bump pointer allocated array of offsets for each
99 /// source line. This is lazily computed. This is owned by the
100 /// SourceManager BumpPointerAllocator object.
101 unsigned *SourceLineCache;
103 /// NumLines - The number of lines in this ContentCache. This is only valid
104 /// if SourceLineCache is non-null.
107 /// getBuffer - Returns the memory buffer for the associated content.
109 /// \param Diag Object through which diagnostics will be emitted if the
110 /// buffer cannot be retrieved.
112 /// \param Loc If specified, is the location that invalid file diagnostics
113 /// will be emitted at.
115 /// \param Invalid If non-NULL, will be set \c true if an error occurred.
116 const llvm::MemoryBuffer *getBuffer(DiagnosticsEngine &Diag,
117 const SourceManager &SM,
118 SourceLocation Loc = SourceLocation(),
119 bool *Invalid = 0) const;
121 /// getSize - Returns the size of the content encapsulated by this
122 /// ContentCache. This can be the size of the source file or the size of an
123 /// arbitrary scratch buffer. If the ContentCache encapsulates a source
124 /// file this size is retrieved from the file's FileEntry.
125 unsigned getSize() const;
127 /// getSizeBytesMapped - Returns the number of bytes actually mapped for
128 /// this ContentCache. This can be 0 if the MemBuffer was not actually
130 unsigned getSizeBytesMapped() const;
132 /// Returns the kind of memory used to back the memory buffer for
133 /// this content cache. This is used for performance analysis.
134 llvm::MemoryBuffer::BufferKind getMemoryBufferKind() const;
136 void setBuffer(const llvm::MemoryBuffer *B) {
137 assert(!Buffer.getPointer() && "MemoryBuffer already set.");
138 Buffer.setPointer(B);
139 Buffer.setInt(false);
142 /// \brief Get the underlying buffer, returning NULL if the buffer is not
144 const llvm::MemoryBuffer *getRawBuffer() const {
145 return Buffer.getPointer();
148 /// \brief Replace the existing buffer (which will be deleted)
149 /// with the given buffer.
150 void replaceBuffer(const llvm::MemoryBuffer *B, bool DoNotFree = false);
152 /// \brief Determine whether the buffer itself is invalid.
153 bool isBufferInvalid() const {
154 return Buffer.getInt() & InvalidFlag;
157 /// \brief Determine whether the buffer should be freed.
158 bool shouldFreeBuffer() const {
159 return (Buffer.getInt() & DoNotFreeFlag) == 0;
162 ContentCache(const FileEntry *Ent = 0)
163 : Buffer(0, false), OrigEntry(Ent), ContentsEntry(Ent),
164 SourceLineCache(0), NumLines(0) {}
166 ContentCache(const FileEntry *Ent, const FileEntry *contentEnt)
167 : Buffer(0, false), OrigEntry(Ent), ContentsEntry(contentEnt),
168 SourceLineCache(0), NumLines(0) {}
172 /// The copy ctor does not allow copies where source object has either
173 /// a non-NULL Buffer or SourceLineCache. Ownership of allocated memory
174 /// is not transferred, so this is a logical error.
175 ContentCache(const ContentCache &RHS)
176 : Buffer(0, false), SourceLineCache(0)
178 OrigEntry = RHS.OrigEntry;
179 ContentsEntry = RHS.ContentsEntry;
181 assert (RHS.Buffer.getPointer() == 0 && RHS.SourceLineCache == 0 &&
182 "Passed ContentCache object cannot own a buffer.");
184 NumLines = RHS.NumLines;
188 // Disable assignments.
189 ContentCache &operator=(const ContentCache& RHS);
192 /// FileInfo - Information about a FileID, basically just the logical file
193 /// that it represents and include stack information.
195 /// Each FileInfo has include stack information, indicating where it came
196 /// from. This information encodes the #include chain that a token was
197 /// expanded from. The main include file has an invalid IncludeLoc.
199 /// FileInfos contain a "ContentCache *", with the contents of the file.
202 /// IncludeLoc - The location of the #include that brought in this file.
203 /// This is an invalid SLOC for the main file (top of the #include chain).
204 unsigned IncludeLoc; // Really a SourceLocation
206 /// \brief Number of FileIDs (files and macros) that were created during
207 /// preprocessing of this #include, including this SLocEntry.
208 /// Zero means the preprocessor didn't provide such info for this SLocEntry.
209 unsigned NumCreatedFIDs;
211 /// Data - This contains the ContentCache* and the bits indicating the
212 /// characteristic of the file and whether it has #line info, all bitmangled
216 friend class clang::SourceManager;
217 friend class clang::ASTWriter;
218 friend class clang::ASTReader;
220 /// get - Return a FileInfo object.
221 static FileInfo get(SourceLocation IL, const ContentCache *Con,
222 CharacteristicKind FileCharacter) {
224 X.IncludeLoc = IL.getRawEncoding();
225 X.NumCreatedFIDs = 0;
226 X.Data = (uintptr_t)Con;
227 assert((X.Data & 7) == 0 &&"ContentCache pointer insufficiently aligned");
228 assert((unsigned)FileCharacter < 4 && "invalid file character");
229 X.Data |= (unsigned)FileCharacter;
233 SourceLocation getIncludeLoc() const {
234 return SourceLocation::getFromRawEncoding(IncludeLoc);
236 const ContentCache* getContentCache() const {
237 return reinterpret_cast<const ContentCache*>(Data & ~7UL);
240 /// getCharacteristic - Return whether this is a system header or not.
241 CharacteristicKind getFileCharacteristic() const {
242 return (CharacteristicKind)(Data & 3);
245 /// hasLineDirectives - Return true if this FileID has #line directives in
247 bool hasLineDirectives() const { return (Data & 4) != 0; }
249 /// setHasLineDirectives - Set the flag that indicates that this FileID has
250 /// line table entries associated with it.
251 void setHasLineDirectives() {
256 /// ExpansionInfo - Each ExpansionInfo encodes the expansion location - where
257 /// the token was ultimately expanded, and the SpellingLoc - where the actual
258 /// character data for the token came from.
259 class ExpansionInfo {
260 // Really these are all SourceLocations.
262 /// SpellingLoc - Where the spelling for the token can be found.
263 unsigned SpellingLoc;
265 /// ExpansionLocStart/ExpansionLocEnd - In a macro expansion, these
266 /// indicate the start and end of the expansion. In object-like macros,
267 /// these will be the same. In a function-like macro expansion, the start
268 /// will be the identifier and the end will be the ')'. Finally, in
269 /// macro-argument instantitions, the end will be 'SourceLocation()', an
270 /// invalid location.
271 unsigned ExpansionLocStart, ExpansionLocEnd;
274 SourceLocation getSpellingLoc() const {
275 return SourceLocation::getFromRawEncoding(SpellingLoc);
277 SourceLocation getExpansionLocStart() const {
278 return SourceLocation::getFromRawEncoding(ExpansionLocStart);
280 SourceLocation getExpansionLocEnd() const {
281 SourceLocation EndLoc =
282 SourceLocation::getFromRawEncoding(ExpansionLocEnd);
283 return EndLoc.isInvalid() ? getExpansionLocStart() : EndLoc;
286 std::pair<SourceLocation,SourceLocation> getExpansionLocRange() const {
287 return std::make_pair(getExpansionLocStart(), getExpansionLocEnd());
290 bool isMacroArgExpansion() const {
291 // Note that this needs to return false for default constructed objects.
292 return getExpansionLocStart().isValid() &&
293 SourceLocation::getFromRawEncoding(ExpansionLocEnd).isInvalid();
296 /// create - Return a ExpansionInfo for an expansion. Start and End specify
297 /// the expansion range (where the macro is expanded), and SpellingLoc
298 /// specifies the spelling location (where the characters from the token
299 /// come from). All three can refer to normal File SLocs or expansion
301 static ExpansionInfo create(SourceLocation SpellingLoc,
302 SourceLocation Start, SourceLocation End) {
304 X.SpellingLoc = SpellingLoc.getRawEncoding();
305 X.ExpansionLocStart = Start.getRawEncoding();
306 X.ExpansionLocEnd = End.getRawEncoding();
310 /// createForMacroArg - Return a special ExpansionInfo for the expansion of
311 /// a macro argument into a function-like macro's body. ExpansionLoc
312 /// specifies the expansion location (where the macro is expanded). This
313 /// doesn't need to be a range because a macro is always expanded at
314 /// a macro parameter reference, and macro parameters are always exactly
315 /// one token. SpellingLoc specifies the spelling location (where the
316 /// characters from the token come from). ExpansionLoc and SpellingLoc can
317 /// both refer to normal File SLocs or expansion locations.
321 /// #define F(x) f(x)
325 /// When expanding '\c F(42)', the '\c x' would call this with an
326 /// SpellingLoc pointing at '\c 42' anad an ExpansionLoc pointing at its
327 /// location in the definition of '\c F'.
328 static ExpansionInfo createForMacroArg(SourceLocation SpellingLoc,
329 SourceLocation ExpansionLoc) {
330 // We store an intentionally invalid source location for the end of the
331 // expansion range to mark that this is a macro argument ion rather than
333 return create(SpellingLoc, ExpansionLoc, SourceLocation());
337 /// SLocEntry - This is a discriminated union of FileInfo and
338 /// ExpansionInfo. SourceManager keeps an array of these objects, and
339 /// they are uniquely identified by the FileID datatype.
341 unsigned Offset; // low bit is set for expansion info.
344 ExpansionInfo Expansion;
347 unsigned getOffset() const { return Offset >> 1; }
349 bool isExpansion() const { return Offset & 1; }
350 bool isFile() const { return !isExpansion(); }
352 const FileInfo &getFile() const {
353 assert(isFile() && "Not a file SLocEntry!");
357 const ExpansionInfo &getExpansion() const {
358 assert(isExpansion() && "Not a macro expansion SLocEntry!");
362 static SLocEntry get(unsigned Offset, const FileInfo &FI) {
364 E.Offset = Offset << 1;
369 static SLocEntry get(unsigned Offset, const ExpansionInfo &Expansion) {
371 E.Offset = (Offset << 1) | 1;
372 E.Expansion = Expansion;
376 } // end SrcMgr namespace.
378 /// \brief External source of source location entries.
379 class ExternalSLocEntrySource {
381 virtual ~ExternalSLocEntrySource();
383 /// \brief Read the source location entry with index ID, which will always be
386 /// \returns true if an error occurred that prevented the source-location
387 /// entry from being loaded.
388 virtual bool ReadSLocEntry(int ID) = 0;
392 /// IsBeforeInTranslationUnitCache - This class holds the cache used by
393 /// isBeforeInTranslationUnit. The cache structure is complex enough to be
394 /// worth breaking out of SourceManager.
395 class IsBeforeInTranslationUnitCache {
396 /// L/R QueryFID - These are the FID's of the cached query. If these match up
397 /// with a subsequent query, the result can be reused.
398 FileID LQueryFID, RQueryFID;
400 /// \brief True if LQueryFID was created before RQueryFID. This is used
401 /// to compare macro expansion locations.
402 bool IsLQFIDBeforeRQFID;
404 /// CommonFID - This is the file found in common between the two #include
405 /// traces. It is the nearest common ancestor of the #include tree.
408 /// L/R CommonOffset - This is the offset of the previous query in CommonFID.
409 /// Usually, this represents the location of the #include for QueryFID, but if
410 /// LQueryFID is a parent of RQueryFID (or vise versa) then these can be a
411 /// random token in the parent.
412 unsigned LCommonOffset, RCommonOffset;
415 /// isCacheValid - Return true if the currently cached values match up with
416 /// the specified LHS/RHS query. If not, we can't use the cache.
417 bool isCacheValid(FileID LHS, FileID RHS) const {
418 return LQueryFID == LHS && RQueryFID == RHS;
421 /// getCachedResult - If the cache is valid, compute the result given the
422 /// specified offsets in the LHS/RHS FID's.
423 bool getCachedResult(unsigned LOffset, unsigned ROffset) const {
424 // If one of the query files is the common file, use the offset. Otherwise,
425 // use the #include loc in the common file.
426 if (LQueryFID != CommonFID) LOffset = LCommonOffset;
427 if (RQueryFID != CommonFID) ROffset = RCommonOffset;
429 // It is common for multiple macro expansions to be "included" from the same
430 // location (expansion location), in which case use the order of the FileIDs
431 // to determine which came first. This will also take care the case where
432 // one of the locations points at the inclusion/expansion point of the other
433 // in which case its FileID will come before the other.
434 if (LOffset == ROffset &&
435 (LQueryFID != CommonFID || RQueryFID != CommonFID))
436 return IsLQFIDBeforeRQFID;
438 return LOffset < ROffset;
441 // Set up a new query.
442 void setQueryFIDs(FileID LHS, FileID RHS, bool isLFIDBeforeRFID) {
446 IsLQFIDBeforeRQFID = isLFIDBeforeRFID;
450 LQueryFID = RQueryFID = FileID();
451 IsLQFIDBeforeRQFID = false;
454 void setCommonLoc(FileID commonFID, unsigned lCommonOffset,
455 unsigned rCommonOffset) {
456 CommonFID = commonFID;
457 LCommonOffset = lCommonOffset;
458 RCommonOffset = rCommonOffset;
463 /// \brief This class handles loading and caching of source files into memory.
465 /// This object owns the MemoryBuffer objects for all of the loaded
466 /// files and assigns unique FileID's for each unique #include chain.
468 /// The SourceManager can be queried for information about SourceLocation
469 /// objects, turning them into either spelling or expansion locations. Spelling
470 /// locations represent where the bytes corresponding to a token came from and
471 /// expansion locations represent where the location is in the user's view. In
472 /// the case of a macro expansion, for example, the spelling location indicates
473 /// where the expanded token came from and the expansion location specifies
474 /// where it was expanded.
475 class SourceManager : public llvm::RefCountedBase<SourceManager> {
476 /// \brief DiagnosticsEngine object.
477 DiagnosticsEngine &Diag;
479 FileManager &FileMgr;
481 mutable llvm::BumpPtrAllocator ContentCacheAlloc;
483 /// FileInfos - Memoized information about all of the files tracked by this
484 /// SourceManager. This set allows us to merge ContentCache entries based
485 /// on their FileEntry*. All ContentCache objects will thus have unique,
486 /// non-null, FileEntry pointers.
487 llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*> FileInfos;
489 /// \brief True if the ContentCache for files that are overriden by other
490 /// files, should report the original file name. Defaults to true.
491 bool OverridenFilesKeepOriginalName;
493 /// \brief Files that have been overriden with the contents from another file.
494 llvm::DenseMap<const FileEntry *, const FileEntry *> OverriddenFiles;
496 /// MemBufferInfos - Information about various memory buffers that we have
497 /// read in. All FileEntry* within the stored ContentCache objects are NULL,
498 /// as they do not refer to a file.
499 std::vector<SrcMgr::ContentCache*> MemBufferInfos;
501 /// \brief The table of SLocEntries that are local to this module.
503 /// Positive FileIDs are indexes into this table. Entry 0 indicates an invalid
505 std::vector<SrcMgr::SLocEntry> LocalSLocEntryTable;
507 /// \brief The table of SLocEntries that are loaded from other modules.
509 /// Negative FileIDs are indexes into this table. To get from ID to an index,
511 std::vector<SrcMgr::SLocEntry> LoadedSLocEntryTable;
513 /// \brief The starting offset of the next local SLocEntry.
515 /// This is LocalSLocEntryTable.back().Offset + the size of that entry.
516 unsigned NextLocalOffset;
518 /// \brief The starting offset of the latest batch of loaded SLocEntries.
520 /// This is LoadedSLocEntryTable.back().Offset, except that that entry might
521 /// not have been loaded, so that value would be unknown.
522 unsigned CurrentLoadedOffset;
524 /// \brief The highest possible offset is 2^31-1, so CurrentLoadedOffset
526 static const unsigned MaxLoadedOffset = 1U << 31U;
528 /// \brief A bitmap that indicates whether the entries of LoadedSLocEntryTable
529 /// have already been loaded from the external source.
531 /// Same indexing as LoadedSLocEntryTable.
532 std::vector<bool> SLocEntryLoaded;
534 /// \brief An external source for source location entries.
535 ExternalSLocEntrySource *ExternalSLocEntries;
537 /// LastFileIDLookup - This is a one-entry cache to speed up getFileID.
538 /// LastFileIDLookup records the last FileID looked up or created, because it
539 /// is very common to look up many tokens from the same file.
540 mutable FileID LastFileIDLookup;
542 /// LineTable - This holds information for #line directives. It is referenced
543 /// by indices from SLocEntryTable.
544 LineTableInfo *LineTable;
546 /// LastLineNo - These ivars serve as a cache used in the getLineNumber
547 /// method which is used to speedup getLineNumber calls to nearby locations.
548 mutable FileID LastLineNoFileIDQuery;
549 mutable SrcMgr::ContentCache *LastLineNoContentCache;
550 mutable unsigned LastLineNoFilePos;
551 mutable unsigned LastLineNoResult;
553 /// MainFileID - The file ID for the main source file of the translation unit.
556 /// \brief The file ID for the precompiled preamble there is one.
557 FileID PreambleFileID;
559 // Statistics for -print-stats.
560 mutable unsigned NumLinearScans, NumBinaryProbes;
562 // Cache results for the isBeforeInTranslationUnit method.
563 mutable IsBeforeInTranslationUnitCache IsBeforeInTUCache;
565 // Cache for the "fake" buffer used for error-recovery purposes.
566 mutable llvm::MemoryBuffer *FakeBufferForRecovery;
568 /// \brief Lazily computed map of macro argument chunks to their expanded
570 typedef std::map<unsigned, SourceLocation> MacroArgsMap;
572 mutable llvm::DenseMap<FileID, MacroArgsMap *> MacroArgsCacheMap;
574 // SourceManager doesn't support copy construction.
575 explicit SourceManager(const SourceManager&);
576 void operator=(const SourceManager&);
578 SourceManager(DiagnosticsEngine &Diag, FileManager &FileMgr);
581 void clearIDTables();
583 DiagnosticsEngine &getDiagnostics() const { return Diag; }
585 FileManager &getFileManager() const { return FileMgr; }
587 /// \brief Set true if the SourceManager should report the original file name
588 /// for contents of files that were overriden by other files.Defaults to true.
589 void setOverridenFilesKeepOriginalName(bool value) {
590 OverridenFilesKeepOriginalName = value;
593 /// createMainFileIDForMembuffer - Create the FileID for a memory buffer
594 /// that will represent the FileID for the main source. One example
595 /// of when this would be used is when the main source is read from STDIN.
596 FileID createMainFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer) {
597 assert(MainFileID.isInvalid() && "MainFileID already set!");
598 MainFileID = createFileIDForMemBuffer(Buffer);
602 //===--------------------------------------------------------------------===//
603 // MainFileID creation and querying methods.
604 //===--------------------------------------------------------------------===//
606 /// getMainFileID - Returns the FileID of the main source file.
607 FileID getMainFileID() const { return MainFileID; }
609 /// createMainFileID - Create the FileID for the main source file.
610 FileID createMainFileID(const FileEntry *SourceFile) {
611 assert(MainFileID.isInvalid() && "MainFileID already set!");
612 MainFileID = createFileID(SourceFile, SourceLocation(), SrcMgr::C_User);
616 /// \brief Set the file ID for the precompiled preamble.
617 void setPreambleFileID(FileID Preamble) {
618 assert(PreambleFileID.isInvalid() && "PreambleFileID already set!");
619 PreambleFileID = Preamble;
622 /// \brief Get the file ID for the precompiled preamble if there is one.
623 FileID getPreambleFileID() const { return PreambleFileID; }
625 //===--------------------------------------------------------------------===//
626 // Methods to create new FileID's and macro expansions.
627 //===--------------------------------------------------------------------===//
629 /// createFileID - Create a new FileID that represents the specified file
630 /// being #included from the specified IncludePosition. This translates NULL
631 /// into standard input.
632 FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos,
633 SrcMgr::CharacteristicKind FileCharacter,
634 int LoadedID = 0, unsigned LoadedOffset = 0) {
635 const SrcMgr::ContentCache *IR = getOrCreateContentCache(SourceFile);
636 assert(IR && "getOrCreateContentCache() cannot return NULL");
637 return createFileID(IR, IncludePos, FileCharacter, LoadedID, LoadedOffset);
640 /// createFileIDForMemBuffer - Create a new FileID that represents the
641 /// specified memory buffer. This does no caching of the buffer and takes
642 /// ownership of the MemoryBuffer, so only pass a MemoryBuffer to this once.
643 FileID createFileIDForMemBuffer(const llvm::MemoryBuffer *Buffer,
644 int LoadedID = 0, unsigned LoadedOffset = 0) {
645 return createFileID(createMemBufferContentCache(Buffer), SourceLocation(),
646 SrcMgr::C_User, LoadedID, LoadedOffset);
649 /// createMacroArgExpansionLoc - Return a new SourceLocation that encodes the
650 /// fact that a token from SpellingLoc should actually be referenced from
651 /// ExpansionLoc, and that it represents the expansion of a macro argument
652 /// into the function-like macro body.
653 SourceLocation createMacroArgExpansionLoc(SourceLocation Loc,
654 SourceLocation ExpansionLoc,
657 /// createExpansionLoc - Return a new SourceLocation that encodes the fact
658 /// that a token from SpellingLoc should actually be referenced from
660 SourceLocation createExpansionLoc(SourceLocation Loc,
661 SourceLocation ExpansionLocStart,
662 SourceLocation ExpansionLocEnd,
665 unsigned LoadedOffset = 0);
667 /// \brief Retrieve the memory buffer associated with the given file.
669 /// \param Invalid If non-NULL, will be set \c true if an error
670 /// occurs while retrieving the memory buffer.
671 const llvm::MemoryBuffer *getMemoryBufferForFile(const FileEntry *File,
674 /// \brief Override the contents of the given source file by providing an
675 /// already-allocated buffer.
677 /// \param SourceFile the source file whose contents will be overriden.
679 /// \param Buffer the memory buffer whose contents will be used as the
680 /// data in the given source file.
682 /// \param DoNotFree If true, then the buffer will not be freed when the
683 /// source manager is destroyed.
684 void overrideFileContents(const FileEntry *SourceFile,
685 const llvm::MemoryBuffer *Buffer,
686 bool DoNotFree = false);
688 /// \brief Override the the given source file with another one.
690 /// \param SourceFile the source file which will be overriden.
692 /// \param NewFile the file whose contents will be used as the
693 /// data instead of the contents of the given source file.
694 void overrideFileContents(const FileEntry *SourceFile,
695 const FileEntry *NewFile);
697 //===--------------------------------------------------------------------===//
698 // FileID manipulation methods.
699 //===--------------------------------------------------------------------===//
701 /// getBuffer - Return the buffer for the specified FileID. If there is an
702 /// error opening this buffer the first time, this manufactures a temporary
703 /// buffer and returns a non-empty error string.
704 const llvm::MemoryBuffer *getBuffer(FileID FID, SourceLocation Loc,
705 bool *Invalid = 0) const {
706 bool MyInvalid = false;
707 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid);
708 if (MyInvalid || !Entry.isFile()) {
712 return getFakeBufferForRecovery();
715 return Entry.getFile().getContentCache()->getBuffer(Diag, *this, Loc,
719 const llvm::MemoryBuffer *getBuffer(FileID FID, bool *Invalid = 0) const {
720 bool MyInvalid = false;
721 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid);
722 if (MyInvalid || !Entry.isFile()) {
726 return getFakeBufferForRecovery();
729 return Entry.getFile().getContentCache()->getBuffer(Diag, *this,
734 /// getFileEntryForID - Returns the FileEntry record for the provided FileID.
735 const FileEntry *getFileEntryForID(FileID FID) const {
736 bool MyInvalid = false;
737 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &MyInvalid);
738 if (MyInvalid || !Entry.isFile())
741 return Entry.getFile().getContentCache()->OrigEntry;
744 /// Returns the FileEntry record for the provided SLocEntry.
745 const FileEntry *getFileEntryForSLocEntry(const SrcMgr::SLocEntry &sloc) const
747 return sloc.getFile().getContentCache()->OrigEntry;
750 /// getBufferData - Return a StringRef to the source buffer data for the
751 /// specified FileID.
753 /// \param FID The file ID whose contents will be returned.
754 /// \param Invalid If non-NULL, will be set true if an error occurred.
755 StringRef getBufferData(FileID FID, bool *Invalid = 0) const;
757 /// \brief Get the number of FileIDs (files and macros) that were created
758 /// during preprocessing of \arg FID, including it.
759 unsigned getNumCreatedFIDsForFileID(FileID FID) const {
760 bool Invalid = false;
761 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid);
762 if (Invalid || !Entry.isFile())
765 return Entry.getFile().NumCreatedFIDs;
768 /// \brief Set the number of FileIDs (files and macros) that were created
769 /// during preprocessing of \arg FID, including it.
770 void setNumCreatedFIDsForFileID(FileID FID, unsigned NumFIDs) const {
771 bool Invalid = false;
772 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid);
773 if (Invalid || !Entry.isFile())
776 assert(Entry.getFile().NumCreatedFIDs == 0 && "Already set!");
777 const_cast<SrcMgr::FileInfo &>(Entry.getFile()).NumCreatedFIDs = NumFIDs;
780 //===--------------------------------------------------------------------===//
781 // SourceLocation manipulation methods.
782 //===--------------------------------------------------------------------===//
784 /// getFileID - Return the FileID for a SourceLocation. This is a very
785 /// hot method that is used for all SourceManager queries that start with a
786 /// SourceLocation object. It is responsible for finding the entry in
787 /// SLocEntryTable which contains the specified location.
789 FileID getFileID(SourceLocation SpellingLoc) const {
790 unsigned SLocOffset = SpellingLoc.getOffset();
792 // If our one-entry cache covers this offset, just return it.
793 if (isOffsetInFileID(LastFileIDLookup, SLocOffset))
794 return LastFileIDLookup;
796 return getFileIDSlow(SLocOffset);
799 /// getLocForStartOfFile - Return the source location corresponding to the
800 /// first byte of the specified file.
801 SourceLocation getLocForStartOfFile(FileID FID) const {
802 bool Invalid = false;
803 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid);
804 if (Invalid || !Entry.isFile())
805 return SourceLocation();
807 unsigned FileOffset = Entry.getOffset();
808 return SourceLocation::getFileLoc(FileOffset);
811 /// \brief Returns the include location if \arg FID is a #include'd file
812 /// otherwise it returns an invalid location.
813 SourceLocation getIncludeLoc(FileID FID) const {
814 bool Invalid = false;
815 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID, &Invalid);
816 if (Invalid || !Entry.isFile())
817 return SourceLocation();
819 return Entry.getFile().getIncludeLoc();
822 /// getExpansionLoc - Given a SourceLocation object, return the expansion
823 /// location referenced by the ID.
824 SourceLocation getExpansionLoc(SourceLocation Loc) const {
825 // Handle the non-mapped case inline, defer to out of line code to handle
827 if (Loc.isFileID()) return Loc;
828 return getExpansionLocSlowCase(Loc);
831 /// \brief Given \arg Loc, if it is a macro location return the expansion
832 /// location or the spelling location, depending on if it comes from a
833 /// macro argument or not.
834 SourceLocation getFileLoc(SourceLocation Loc) const {
835 if (Loc.isFileID()) return Loc;
836 return getFileLocSlowCase(Loc);
839 /// getImmediateExpansionRange - Loc is required to be an expansion location.
840 /// Return the start/end of the expansion information.
841 std::pair<SourceLocation,SourceLocation>
842 getImmediateExpansionRange(SourceLocation Loc) const;
844 /// getExpansionRange - Given a SourceLocation object, return the range of
845 /// tokens covered by the expansion the ultimate file.
846 std::pair<SourceLocation,SourceLocation>
847 getExpansionRange(SourceLocation Loc) const;
850 /// getSpellingLoc - Given a SourceLocation object, return the spelling
851 /// location referenced by the ID. This is the place where the characters
852 /// that make up the lexed token can be found.
853 SourceLocation getSpellingLoc(SourceLocation Loc) const {
854 // Handle the non-mapped case inline, defer to out of line code to handle
856 if (Loc.isFileID()) return Loc;
857 return getSpellingLocSlowCase(Loc);
860 /// getImmediateSpellingLoc - Given a SourceLocation object, return the
861 /// spelling location referenced by the ID. This is the first level down
862 /// towards the place where the characters that make up the lexed token can be
863 /// found. This should not generally be used by clients.
864 SourceLocation getImmediateSpellingLoc(SourceLocation Loc) const;
866 /// getDecomposedLoc - Decompose the specified location into a raw FileID +
867 /// Offset pair. The first element is the FileID, the second is the
868 /// offset from the start of the buffer of the location.
869 std::pair<FileID, unsigned> getDecomposedLoc(SourceLocation Loc) const {
870 FileID FID = getFileID(Loc);
871 return std::make_pair(FID, Loc.getOffset()-getSLocEntry(FID).getOffset());
874 /// getDecomposedExpansionLoc - Decompose the specified location into a raw
875 /// FileID + Offset pair. If the location is an expansion record, walk
876 /// through it until we find the final location expanded.
877 std::pair<FileID, unsigned>
878 getDecomposedExpansionLoc(SourceLocation Loc) const {
879 FileID FID = getFileID(Loc);
880 const SrcMgr::SLocEntry *E = &getSLocEntry(FID);
882 unsigned Offset = Loc.getOffset()-E->getOffset();
884 return std::make_pair(FID, Offset);
886 return getDecomposedExpansionLocSlowCase(E);
889 /// getDecomposedSpellingLoc - Decompose the specified location into a raw
890 /// FileID + Offset pair. If the location is an expansion record, walk
891 /// through it until we find its spelling record.
892 std::pair<FileID, unsigned>
893 getDecomposedSpellingLoc(SourceLocation Loc) const {
894 FileID FID = getFileID(Loc);
895 const SrcMgr::SLocEntry *E = &getSLocEntry(FID);
897 unsigned Offset = Loc.getOffset()-E->getOffset();
899 return std::make_pair(FID, Offset);
900 return getDecomposedSpellingLocSlowCase(E, Offset);
903 /// getFileOffset - This method returns the offset from the start
904 /// of the file that the specified SourceLocation represents. This is not very
905 /// meaningful for a macro ID.
906 unsigned getFileOffset(SourceLocation SpellingLoc) const {
907 return getDecomposedLoc(SpellingLoc).second;
910 /// isMacroArgExpansion - This method tests whether the given source location
911 /// represents a macro argument's expansion into the function-like macro
912 /// definition. Such source locations only appear inside of the expansion
913 /// locations representing where a particular function-like macro was
915 bool isMacroArgExpansion(SourceLocation Loc) const;
917 /// \brief Returns true if \arg Loc is inside the [\arg Start, +\arg Length)
918 /// chunk of the source location address space.
919 /// If it's true and \arg RelativeOffset is non-null, it will be set to the
920 /// relative offset of \arg Loc inside the chunk.
921 bool isInSLocAddrSpace(SourceLocation Loc,
922 SourceLocation Start, unsigned Length,
923 unsigned *RelativeOffset = 0) const {
924 assert(((Start.getOffset() < NextLocalOffset &&
925 Start.getOffset()+Length <= NextLocalOffset) ||
926 (Start.getOffset() >= CurrentLoadedOffset &&
927 Start.getOffset()+Length < MaxLoadedOffset)) &&
928 "Chunk is not valid SLoc address space");
929 unsigned LocOffs = Loc.getOffset();
930 unsigned BeginOffs = Start.getOffset();
931 unsigned EndOffs = BeginOffs + Length;
932 if (LocOffs >= BeginOffs && LocOffs < EndOffs) {
934 *RelativeOffset = LocOffs - BeginOffs;
941 /// \brief Return true if both \arg LHS and \arg RHS are in the local source
942 /// location address space or the loaded one. If it's true and
943 /// \arg RelativeOffset is non-null, it will be set to the offset of \arg RHS
944 /// relative to \arg LHS.
945 bool isInSameSLocAddrSpace(SourceLocation LHS, SourceLocation RHS,
946 int *RelativeOffset) const {
947 unsigned LHSOffs = LHS.getOffset(), RHSOffs = RHS.getOffset();
948 bool LHSLoaded = LHSOffs >= CurrentLoadedOffset;
949 bool RHSLoaded = RHSOffs >= CurrentLoadedOffset;
951 if (LHSLoaded == RHSLoaded) {
953 *RelativeOffset = RHSOffs - LHSOffs;
960 //===--------------------------------------------------------------------===//
961 // Queries about the code at a SourceLocation.
962 //===--------------------------------------------------------------------===//
964 /// getCharacterData - Return a pointer to the start of the specified location
965 /// in the appropriate spelling MemoryBuffer.
967 /// \param Invalid If non-NULL, will be set \c true if an error occurs.
968 const char *getCharacterData(SourceLocation SL, bool *Invalid = 0) const;
970 /// getColumnNumber - Return the column # for the specified file position.
971 /// This is significantly cheaper to compute than the line number. This
972 /// returns zero if the column number isn't known. This may only be called
973 /// on a file sloc, so you must choose a spelling or expansion location
974 /// before calling this method.
975 unsigned getColumnNumber(FileID FID, unsigned FilePos,
976 bool *Invalid = 0) const;
977 unsigned getSpellingColumnNumber(SourceLocation Loc, bool *Invalid = 0) const;
978 unsigned getExpansionColumnNumber(SourceLocation Loc,
979 bool *Invalid = 0) const;
980 unsigned getPresumedColumnNumber(SourceLocation Loc, bool *Invalid = 0) const;
983 /// getLineNumber - Given a SourceLocation, return the spelling line number
984 /// for the position indicated. This requires building and caching a table of
985 /// line offsets for the MemoryBuffer, so this is not cheap: use only when
986 /// about to emit a diagnostic.
987 unsigned getLineNumber(FileID FID, unsigned FilePos, bool *Invalid = 0) const;
988 unsigned getSpellingLineNumber(SourceLocation Loc, bool *Invalid = 0) const;
989 unsigned getExpansionLineNumber(SourceLocation Loc, bool *Invalid = 0) const;
990 unsigned getPresumedLineNumber(SourceLocation Loc, bool *Invalid = 0) const;
992 /// Return the filename or buffer identifier of the buffer the location is in.
993 /// Note that this name does not respect #line directives. Use getPresumedLoc
994 /// for normal clients.
995 const char *getBufferName(SourceLocation Loc, bool *Invalid = 0) const;
997 /// getFileCharacteristic - return the file characteristic of the specified
998 /// source location, indicating whether this is a normal file, a system
999 /// header, or an "implicit extern C" system header.
1001 /// This state can be modified with flags on GNU linemarker directives like:
1003 /// which changes all source locations in the current file after that to be
1004 /// considered to be from a system header.
1005 SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const;
1007 /// getPresumedLoc - This method returns the "presumed" location of a
1008 /// SourceLocation specifies. A "presumed location" can be modified by #line
1009 /// or GNU line marker directives. This provides a view on the data that a
1010 /// user should see in diagnostics, for example.
1012 /// Note that a presumed location is always given as the expansion point of
1013 /// an expansion location, not at the spelling location.
1015 /// \returns The presumed location of the specified SourceLocation. If the
1016 /// presumed location cannot be calculate (e.g., because \p Loc is invalid
1017 /// or the file containing \p Loc has changed on disk), returns an invalid
1018 /// presumed location.
1019 PresumedLoc getPresumedLoc(SourceLocation Loc) const;
1021 /// isFromSameFile - Returns true if both SourceLocations correspond to
1023 bool isFromSameFile(SourceLocation Loc1, SourceLocation Loc2) const {
1024 return getFileID(Loc1) == getFileID(Loc2);
1027 /// isFromMainFile - Returns true if the file of provided SourceLocation is
1029 bool isFromMainFile(SourceLocation Loc) const {
1030 return getFileID(Loc) == getMainFileID();
1033 /// isInSystemHeader - Returns if a SourceLocation is in a system header.
1034 bool isInSystemHeader(SourceLocation Loc) const {
1035 return getFileCharacteristic(Loc) != SrcMgr::C_User;
1038 /// isInExternCSystemHeader - Returns if a SourceLocation is in an "extern C"
1040 bool isInExternCSystemHeader(SourceLocation Loc) const {
1041 return getFileCharacteristic(Loc) == SrcMgr::C_ExternCSystem;
1044 /// \brief The size of the SLocEnty that \arg FID represents.
1045 unsigned getFileIDSize(FileID FID) const;
1047 /// \brief Given a specific FileID, returns true if \arg Loc is inside that
1048 /// FileID chunk and sets relative offset (offset of \arg Loc from beginning
1049 /// of FileID) to \arg relativeOffset.
1050 bool isInFileID(SourceLocation Loc, FileID FID,
1051 unsigned *RelativeOffset = 0) const {
1052 unsigned Offs = Loc.getOffset();
1053 if (isOffsetInFileID(FID, Offs)) {
1055 *RelativeOffset = Offs - getSLocEntry(FID).getOffset();
1062 //===--------------------------------------------------------------------===//
1063 // Line Table Manipulation Routines
1064 //===--------------------------------------------------------------------===//
1066 /// getLineTableFilenameID - Return the uniqued ID for the specified filename.
1068 unsigned getLineTableFilenameID(StringRef Str);
1070 /// AddLineNote - Add a line note to the line table for the FileID and offset
1071 /// specified by Loc. If FilenameID is -1, it is considered to be
1073 void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID);
1074 void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID,
1075 bool IsFileEntry, bool IsFileExit,
1076 bool IsSystemHeader, bool IsExternCHeader);
1078 /// \brief Determine if the source manager has a line table.
1079 bool hasLineTable() const { return LineTable != 0; }
1081 /// \brief Retrieve the stored line table.
1082 LineTableInfo &getLineTable();
1084 //===--------------------------------------------------------------------===//
1085 // Queries for performance analysis.
1086 //===--------------------------------------------------------------------===//
1088 /// Return the total amount of physical memory allocated by the
1089 /// ContentCache allocator.
1090 size_t getContentCacheSize() const {
1091 return ContentCacheAlloc.getTotalMemory();
1094 struct MemoryBufferSizes {
1095 const size_t malloc_bytes;
1096 const size_t mmap_bytes;
1098 MemoryBufferSizes(size_t malloc_bytes, size_t mmap_bytes)
1099 : malloc_bytes(malloc_bytes), mmap_bytes(mmap_bytes) {}
1102 /// Return the amount of memory used by memory buffers, breaking down
1103 /// by heap-backed versus mmap'ed memory.
1104 MemoryBufferSizes getMemoryBufferSizes() const;
1106 // Return the amount of memory used for various side tables and
1107 // data structures in the SourceManager.
1108 size_t getDataStructureSizes() const;
1110 //===--------------------------------------------------------------------===//
1111 // Other miscellaneous methods.
1112 //===--------------------------------------------------------------------===//
1114 /// \brief Get the source location for the given file:line:col triplet.
1116 /// If the source file is included multiple times, the source location will
1117 /// be based upon the first inclusion.
1118 SourceLocation translateFileLineCol(const FileEntry *SourceFile,
1119 unsigned Line, unsigned Col) const;
1121 /// \brief Get the FileID for the given file.
1123 /// If the source file is included multiple times, the FileID will be the
1124 /// first inclusion.
1125 FileID translateFile(const FileEntry *SourceFile) const;
1127 /// \brief Get the source location in \arg FID for the given line:col.
1128 /// Returns null location if \arg FID is not a file SLocEntry.
1129 SourceLocation translateLineCol(FileID FID,
1130 unsigned Line, unsigned Col) const;
1132 /// \brief If \arg Loc points inside a function macro argument, the returned
1133 /// location will be the macro location in which the argument was expanded.
1134 /// If a macro argument is used multiple times, the expanded location will
1135 /// be at the first expansion of the argument.
1139 /// Passing a file location pointing at 'foo', will yield a macro location
1140 /// where 'foo' was expanded into.
1141 SourceLocation getMacroArgExpandedLocation(SourceLocation Loc) const;
1143 /// \brief Determines the order of 2 source locations in the translation unit.
1145 /// \returns true if LHS source location comes before RHS, false otherwise.
1146 bool isBeforeInTranslationUnit(SourceLocation LHS, SourceLocation RHS) const;
1148 /// \brief Comparison function class.
1149 class LocBeforeThanCompare : public std::binary_function<SourceLocation,
1150 SourceLocation, bool> {
1154 explicit LocBeforeThanCompare(SourceManager &SM) : SM(SM) { }
1156 bool operator()(SourceLocation LHS, SourceLocation RHS) const {
1157 return SM.isBeforeInTranslationUnit(LHS, RHS);
1161 /// \brief Determines the order of 2 source locations in the "source location
1163 bool isBeforeInSLocAddrSpace(SourceLocation LHS, SourceLocation RHS) const {
1164 return isBeforeInSLocAddrSpace(LHS, RHS.getOffset());
1167 /// \brief Determines the order of a source location and a source location
1168 /// offset in the "source location address space".
1170 /// Note that we always consider source locations loaded from
1171 bool isBeforeInSLocAddrSpace(SourceLocation LHS, unsigned RHS) const {
1172 unsigned LHSOffset = LHS.getOffset();
1173 bool LHSLoaded = LHSOffset >= CurrentLoadedOffset;
1174 bool RHSLoaded = RHS >= CurrentLoadedOffset;
1175 if (LHSLoaded == RHSLoaded)
1176 return LHSOffset < RHS;
1181 // Iterators over FileInfos.
1182 typedef llvm::DenseMap<const FileEntry*, SrcMgr::ContentCache*>
1183 ::const_iterator fileinfo_iterator;
1184 fileinfo_iterator fileinfo_begin() const { return FileInfos.begin(); }
1185 fileinfo_iterator fileinfo_end() const { return FileInfos.end(); }
1186 bool hasFileInfo(const FileEntry *File) const {
1187 return FileInfos.find(File) != FileInfos.end();
1190 /// PrintStats - Print statistics to stderr.
1192 void PrintStats() const;
1194 /// \brief Get the number of local SLocEntries we have.
1195 unsigned local_sloc_entry_size() const { return LocalSLocEntryTable.size(); }
1197 /// \brief Get a local SLocEntry. This is exposed for indexing.
1198 const SrcMgr::SLocEntry &getLocalSLocEntry(unsigned Index,
1199 bool *Invalid = 0) const {
1200 assert(Index < LocalSLocEntryTable.size() && "Invalid index");
1201 return LocalSLocEntryTable[Index];
1204 /// \brief Get the number of loaded SLocEntries we have.
1205 unsigned loaded_sloc_entry_size() const { return LoadedSLocEntryTable.size();}
1207 /// \brief Get a loaded SLocEntry. This is exposed for indexing.
1208 const SrcMgr::SLocEntry &getLoadedSLocEntry(unsigned Index, bool *Invalid=0) const {
1209 assert(Index < LoadedSLocEntryTable.size() && "Invalid index");
1210 if (!SLocEntryLoaded[Index])
1211 ExternalSLocEntries->ReadSLocEntry(-(static_cast<int>(Index) + 2));
1212 return LoadedSLocEntryTable[Index];
1215 const SrcMgr::SLocEntry &getSLocEntry(FileID FID, bool *Invalid = 0) const {
1216 return getSLocEntryByID(FID.ID);
1219 unsigned getNextLocalOffset() const { return NextLocalOffset; }
1221 void setExternalSLocEntrySource(ExternalSLocEntrySource *Source) {
1222 assert(LoadedSLocEntryTable.empty() &&
1223 "Invalidating existing loaded entries");
1224 ExternalSLocEntries = Source;
1227 /// \brief Allocate a number of loaded SLocEntries, which will be actually
1228 /// loaded on demand from the external source.
1230 /// NumSLocEntries will be allocated, which occupy a total of TotalSize space
1231 /// in the global source view. The lowest ID and the base offset of the
1232 /// entries will be returned.
1233 std::pair<int, unsigned>
1234 AllocateLoadedSLocEntries(unsigned NumSLocEntries, unsigned TotalSize);
1236 /// \brief Returns true if \arg Loc came from a PCH/Module.
1237 bool isLoadedSourceLocation(SourceLocation Loc) const {
1238 return Loc.getOffset() >= CurrentLoadedOffset;
1241 /// \brief Returns true if \arg Loc did not come from a PCH/Module.
1242 bool isLocalSourceLocation(SourceLocation Loc) const {
1243 return Loc.getOffset() < NextLocalOffset;
1247 const llvm::MemoryBuffer *getFakeBufferForRecovery() const;
1249 /// \brief Get the entry with the given unwrapped FileID.
1250 const SrcMgr::SLocEntry &getSLocEntryByID(int ID) const {
1251 assert(ID != -1 && "Using FileID sentinel value");
1253 return getLoadedSLocEntryByID(ID);
1254 return getLocalSLocEntry(static_cast<unsigned>(ID));
1257 const SrcMgr::SLocEntry &getLoadedSLocEntryByID(int ID) const {
1258 return getLoadedSLocEntry(static_cast<unsigned>(-ID - 2));
1261 /// createExpansionLoc - Implements the common elements of storing an
1262 /// expansion info struct into the SLocEntry table and producing a source
1263 /// location that refers to it.
1264 SourceLocation createExpansionLocImpl(const SrcMgr::ExpansionInfo &Expansion,
1267 unsigned LoadedOffset = 0);
1269 /// isOffsetInFileID - Return true if the specified FileID contains the
1270 /// specified SourceLocation offset. This is a very hot method.
1271 inline bool isOffsetInFileID(FileID FID, unsigned SLocOffset) const {
1272 const SrcMgr::SLocEntry &Entry = getSLocEntry(FID);
1273 // If the entry is after the offset, it can't contain it.
1274 if (SLocOffset < Entry.getOffset()) return false;
1276 // If this is the very last entry then it does.
1280 // If it is the last local entry, then it does if the location is local.
1281 if (static_cast<unsigned>(FID.ID+1) == LocalSLocEntryTable.size()) {
1282 return SLocOffset < NextLocalOffset;
1285 // Otherwise, the entry after it has to not include it. This works for both
1286 // local and loaded entries.
1287 return SLocOffset < getSLocEntry(FileID::get(FID.ID+1)).getOffset();
1290 /// createFileID - Create a new fileID for the specified ContentCache and
1291 /// include position. This works regardless of whether the ContentCache
1292 /// corresponds to a file or some other input source.
1293 FileID createFileID(const SrcMgr::ContentCache* File,
1294 SourceLocation IncludePos,
1295 SrcMgr::CharacteristicKind DirCharacter,
1296 int LoadedID, unsigned LoadedOffset);
1298 const SrcMgr::ContentCache *
1299 getOrCreateContentCache(const FileEntry *SourceFile);
1301 /// createMemBufferContentCache - Create a new ContentCache for the specified
1303 const SrcMgr::ContentCache*
1304 createMemBufferContentCache(const llvm::MemoryBuffer *Buf);
1306 FileID getFileIDSlow(unsigned SLocOffset) const;
1307 FileID getFileIDLocal(unsigned SLocOffset) const;
1308 FileID getFileIDLoaded(unsigned SLocOffset) const;
1310 SourceLocation getExpansionLocSlowCase(SourceLocation Loc) const;
1311 SourceLocation getSpellingLocSlowCase(SourceLocation Loc) const;
1312 SourceLocation getFileLocSlowCase(SourceLocation Loc) const;
1314 std::pair<FileID, unsigned>
1315 getDecomposedExpansionLocSlowCase(const SrcMgr::SLocEntry *E) const;
1316 std::pair<FileID, unsigned>
1317 getDecomposedSpellingLocSlowCase(const SrcMgr::SLocEntry *E,
1318 unsigned Offset) const;
1319 void computeMacroArgsCache(MacroArgsMap *&MacroArgsCache, FileID FID) const;
1321 friend class ASTReader;
1322 friend class ASTWriter;
1326 } // end namespace clang