1 files changed, 305 insertions, 0 deletions
diff --git a/include/clang/Basic/SourceLocation.h b/include/clang/Basic/SourceLocation.h
new file mode 100644
index 0000000..2405c2f
--- /dev/null
+++ b/include/clang/Basic/SourceLocation.h
@@ -0,0 +1,305 @@
+//===--- SourceLocation.h - Compact identifier for Source Files -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines the SourceLocation class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_SOURCELOCATION_H
+#define LLVM_CLANG_SOURCELOCATION_H
+
+#include <utility>
+#include <cassert>
+
+namespace llvm {
+  class MemoryBuffer;
+  class raw_ostream;
+  template <typename T> struct DenseMapInfo;
+}
+
+namespace clang {
+  
+class SourceManager;
+class FileEntry;
+  
+/// FileID - This is an opaque identifier used by SourceManager which refers to
+/// a source file (MemoryBuffer) along with its #include path and #line data.
+///
+class FileID {
+  /// ID - Opaque identifier, 0 is "invalid".
+  unsigned ID;
+public:
+  FileID() : ID(0) {}
+  
+  bool isInvalid() const { return ID == 0; }
+  
+  bool operator==(const FileID &RHS) const { return ID == RHS.ID; }
+  bool operator<(const FileID &RHS) const { return ID < RHS.ID; }
+  bool operator<=(const FileID &RHS) const { return ID <= RHS.ID; }
+  bool operator!=(const FileID &RHS) const { return !(*this == RHS); }
+  bool operator>(const FileID &RHS) const { return RHS < *this; }
+  bool operator>=(const FileID &RHS) const { return RHS <= *this; }
+  
+  static FileID getSentinel() { return get(~0U); }
+  unsigned getHashValue() const { return ID; }
+  
+private:
+  friend class SourceManager;
+  static FileID get(unsigned V) {
+    FileID F;
+    F.ID = V;
+    return F;
+  }
+  unsigned getOpaqueValue() const { return ID; }
+};
+  
+    
+/// SourceLocation - This is a carefully crafted 32-bit identifier that encodes
+/// a full include stack, line and column number information for a position in
+/// an input translation unit.
+class SourceLocation {
+  unsigned ID;
+  friend class SourceManager;
+  enum {
+    MacroIDBit = 1U << 31
+  };
+public:
+
+  SourceLocation() : ID(0) {}  // 0 is an invalid FileID.
+  
+  bool isFileID() const  { return (ID & MacroIDBit) == 0; }
+  bool isMacroID() const { return (ID & MacroIDBit) != 0; }
+  
+  /// isValid - Return true if this is a valid SourceLocation object.  Invalid
+  /// SourceLocations are often used when events have no corresponding location
+  /// in the source (e.g. a diagnostic is required for a command line option).
+  ///
+  bool isValid() const { return ID != 0; }
+  bool isInvalid() const { return ID == 0; }
+  
+private:
+  /// getOffset - Return the index for SourceManager's SLocEntryTable table,
+  /// note that this is not an index *into* it though.
+  unsigned getOffset() const {
+    return ID & ~MacroIDBit;
+  }
+
+  static SourceLocation getFileLoc(unsigned ID) {
+    assert((ID & MacroIDBit) == 0 && "Ran out of source locations!");
+    SourceLocation L;
+    L.ID = ID;
+    return L;
+  }
+  
+  static SourceLocation getMacroLoc(unsigned ID) {
+    assert((ID & MacroIDBit) == 0 && "Ran out of source locations!");
+    SourceLocation L;
+    L.ID = MacroIDBit | ID;
+    return L;
+  }
+public:
+  
+  /// getFileLocWithOffset - Return a source location with the specified offset
+  /// from this file SourceLocation.
+  SourceLocation getFileLocWithOffset(int Offset) const {
+    assert(((getOffset()+Offset) & MacroIDBit) == 0 && "invalid location");
+    SourceLocation L;
+    L.ID = ID+Offset;
+    return L;
+  }
+  
+  /// getRawEncoding - When a SourceLocation itself cannot be used, this returns
+  /// an (opaque) 32-bit integer encoding for it.  This should only be passed
+  /// to SourceLocation::getFromRawEncoding, it should not be inspected
+  /// directly.
+  unsigned getRawEncoding() const { return ID; }
+  
+  
+  /// getFromRawEncoding - Turn a raw encoding of a SourceLocation object into
+  /// a real SourceLocation.
+  static SourceLocation getFromRawEncoding(unsigned Encoding) {
+    SourceLocation X;
+    X.ID = Encoding;
+    return X;
+  }
+  
+  void print(llvm::raw_ostream &OS, const SourceManager &SM) const;
+  void dump(const SourceManager &SM) const;
+};
+
+inline bool operator==(const SourceLocation &LHS, const SourceLocation &RHS) {
+  return LHS.getRawEncoding() == RHS.getRawEncoding();
+}
+
+inline bool operator!=(const SourceLocation &LHS, const SourceLocation &RHS) {
+  return !(LHS == RHS);
+}
+  
+inline bool operator<(const SourceLocation &LHS, const SourceLocation &RHS) {
+  return LHS.getRawEncoding() < RHS.getRawEncoding();
+}
+
+/// SourceRange - a trival tuple used to represent a source range.
+class SourceRange {
+  SourceLocation B;
+  SourceLocation E;
+public:
+  SourceRange(): B(SourceLocation()), E(SourceLocation()) {}
+  SourceRange(SourceLocation loc) : B(loc), E(loc) {}
+  SourceRange(SourceLocation begin, SourceLocation end) : B(begin), E(end) {}
+    
+  SourceLocation getBegin() const { return B; }
+  SourceLocation getEnd() const { return E; }
+  
+  void setBegin(SourceLocation b) { B = b; }
+  void setEnd(SourceLocation e) { E = e; }
+  
+  bool isValid() const { return B.isValid() && E.isValid(); }
+  
+  bool operator==(const SourceRange &X) const {
+    return B == X.B && E == X.E;
+  }
+  
+  bool operator!=(const SourceRange &X) const {
+    return B != X.B || E != X.E;
+  }
+};
+  
+/// FullSourceLoc - A SourceLocation and its associated SourceManager.  Useful
+/// for argument passing to functions that expect both objects.
+class FullSourceLoc : public SourceLocation {
+  SourceManager* SrcMgr;
+public:
+  /// Creates a FullSourceLoc where isValid() returns false.
+  explicit FullSourceLoc() : SrcMgr((SourceManager*) 0) {}
+
+  explicit FullSourceLoc(SourceLocation Loc, SourceManager &SM) 
+    : SourceLocation(Loc), SrcMgr(&SM) {}
+    
+  SourceManager &getManager() {
+    assert(SrcMgr && "SourceManager is NULL.");
+    return *SrcMgr;
+  }
+  
+  const SourceManager &getManager() const {
+    assert(SrcMgr && "SourceManager is NULL.");
+    return *SrcMgr;
+  }
+  
+  FileID getFileID() const;
+  
+  FullSourceLoc getInstantiationLoc() const;
+  FullSourceLoc getSpellingLoc() const;
+
+  unsigned getInstantiationLineNumber() const;
+  unsigned getInstantiationColumnNumber() const;
+
+  unsigned getSpellingLineNumber() const;
+  unsigned getSpellingColumnNumber() const;
+
+  const char *getCharacterData() const;
+  
+  const llvm::MemoryBuffer* getBuffer() const;
+  
+  /// getBufferData - Return a pointer to the start and end of the source buffer
+  /// data for the specified FileID.
+  std::pair<const char*, const char*> getBufferData() const;
+  
+  /// getDecomposedLoc - Decompose the specified location into a raw FileID +
+  /// Offset pair.  The first element is the FileID, the second is the
+  /// offset from the start of the buffer of the location.
+  std::pair<FileID, unsigned> getDecomposedLoc() const;
+
+  bool isInSystemHeader() const;
+  
+  /// Prints information about this FullSourceLoc to stderr. Useful for
+  ///  debugging.
+  void dump() const { SourceLocation::dump(*SrcMgr); }
+
+  friend inline bool 
+  operator==(const FullSourceLoc &LHS, const FullSourceLoc &RHS) {
+    return LHS.getRawEncoding() == RHS.getRawEncoding() &&
+          LHS.SrcMgr == RHS.SrcMgr;
+  }
+
+  friend inline bool 
+  operator!=(const FullSourceLoc &LHS, const FullSourceLoc &RHS) {
+    return !(LHS == RHS);
+  }
+
+};
+  
+/// PresumedLoc - This class represents an unpacked "presumed" location which
+/// can be presented to the user.  A 'presumed' location can be modified by
+/// #line and GNU line marker directives and is always the instantiation point
+/// of a normal location.
+///
+/// You can get a PresumedLoc from a SourceLocation with SourceManager.
+class PresumedLoc {
+  const char *Filename;
+  unsigned Line, Col;
+  SourceLocation IncludeLoc;
+public:
+  PresumedLoc() : Filename(0) {}
+  PresumedLoc(const char *FN, unsigned Ln, unsigned Co, SourceLocation IL)
+    : Filename(FN), Line(Ln), Col(Co), IncludeLoc(IL) {
+  }
+  
+  /// isInvalid - Return true if this object is invalid or uninitialized. This
+  /// occurs when created with invalid source locations or when walking off
+  /// the top of a #include stack.
+  bool isInvalid() const { return Filename == 0; }
+  bool isValid() const { return Filename != 0; }
+  
+  /// getFilename - Return the presumed filename of this location.  This can be
+  /// affected by #line etc.
+  const char *getFilename() const { return Filename; }
+
+  /// getLine - Return the presumed line number of this location.  This can be
+  /// affected by #line etc.
+  unsigned getLine() const { return Line; }
+  
+  /// getColumn - Return the presumed column number of this location.  This can
+  /// not be affected by #line, but is packaged here for convenience.
+  unsigned getColumn() const { return Col; }
+
+  /// getIncludeLoc - Return the presumed include location of this location.
+  /// This can be affected by GNU linemarker directives.
+  SourceLocation getIncludeLoc() const { return IncludeLoc; }
+};
+
+  
+}  // end namespace clang
+
+namespace llvm {
+  /// Define DenseMapInfo so that FileID's can be used as keys in DenseMap and
+  /// DenseSets.
+  template <>
+  struct DenseMapInfo<clang::FileID> {
+    static inline clang::FileID getEmptyKey() {
+      return clang::FileID();
+    }
+    static inline clang::FileID getTombstoneKey() {
+      return clang::FileID::getSentinel(); 
+    }
+    
+    static unsigned getHashValue(clang::FileID S) {
+      return S.getHashValue();
+    }
+    
+    static bool isEqual(clang::FileID LHS, clang::FileID RHS) {
+      return LHS == RHS;
+    }
+    
+    static bool isPod() { return true; }
+  };
+  
+}  // end namespace llvm
+
+#endif