зеркало из https://github.com/microsoft/clang-1.git
68 строки
2.2 KiB
C++
68 строки
2.2 KiB
C++
//===--- HeaderMap.h - A file that acts like dir of symlinks ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the HeaderMap interface.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LEX_HEADERMAP_H
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#define LLVM_CLANG_LEX_HEADERMAP_H
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namespace llvm {
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class MemoryBuffer;
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}
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namespace clang {
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class FileEntry;
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class FileManager;
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struct HMapBucket;
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struct HMapHeader;
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/// This class represents an Apple concept known as a 'header map'. To the
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/// #include file resolution process, it basically acts like a directory of
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/// symlinks to files. Its advantages are that it is dense and more efficient
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/// to create and process than a directory of symlinks.
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class HeaderMap {
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HeaderMap(const HeaderMap&); // DO NOT IMPLEMENT
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void operator=(const HeaderMap&); // DO NOT IMPLEMENT
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const llvm::MemoryBuffer *FileBuffer;
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bool NeedsBSwap;
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HeaderMap(const llvm::MemoryBuffer *File, bool BSwap)
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: FileBuffer(File), NeedsBSwap(BSwap) {
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}
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public:
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~HeaderMap();
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/// HeaderMap::Create - This attempts to load the specified file as a header
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/// map. If it doesn't look like a HeaderMap, it gives up and returns null.
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static const HeaderMap *Create(const FileEntry *FE);
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/// LookupFile - Check to see if the specified relative filename is located in
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/// this HeaderMap. If so, open it and return its FileEntry.
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const FileEntry *LookupFile(const char *FilenameStart,const char *FilenameEnd,
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FileManager &FM) const;
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/// getFileName - Return the filename of the headermap.
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const char *getFileName() const;
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/// dump - Print the contents of this headermap to stderr.
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void dump() const;
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private:
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unsigned getEndianAdjustedWord(unsigned X) const;
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const HMapHeader &getHeader() const;
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HMapBucket getBucket(unsigned BucketNo) const;
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const char *getString(unsigned StrTabIdx) const;
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};
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} // end namespace clang.
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#endif
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