1 //===--- SourceLocation.h - Compact identifier for 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 SourceLocation class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_SOURCELOCATION_H
15 #define LLVM_CLANG_SOURCELOCATION_H
17 #include "llvm/Bitcode/SerializationFwd.h"
24 template <typename T> struct DenseMapInfo;
32 /// FileID - This is an opaque identifier used by SourceManager which refers to
33 /// a source file (MemoryBuffer) along with its #include path and #line data.
36 /// ID - Opaque identifier, 0 is "invalid".
41 bool isInvalid() const { return ID == 0; }
43 bool operator==(const FileID &RHS) const { return ID == RHS.ID; }
44 bool operator<(const FileID &RHS) const { return ID < RHS.ID; }
45 bool operator<=(const FileID &RHS) const { return ID <= RHS.ID; }
46 bool operator!=(const FileID &RHS) const { return !(*this == RHS); }
47 bool operator>(const FileID &RHS) const { return RHS < *this; }
48 bool operator>=(const FileID &RHS) const { return RHS <= *this; }
50 static FileID getSentinel() { return get(~0U); }
51 unsigned getHashValue() const { return ID; }
54 friend class SourceManager;
55 static FileID get(unsigned V) {
60 unsigned getOpaqueValue() const { return ID; }
64 /// SourceLocation - This is a carefully crafted 32-bit identifier that encodes
65 /// a full include stack, line and column number information for a position in
66 /// an input translation unit.
67 class SourceLocation {
69 friend class SourceManager;
75 SourceLocation() : ID(0) {} // 0 is an invalid FileID.
77 bool isFileID() const { return (ID & MacroIDBit) == 0; }
78 bool isMacroID() const { return (ID & MacroIDBit) != 0; }
80 /// isValid - Return true if this is a valid SourceLocation object. Invalid
81 /// SourceLocations are often used when events have no corresponding location
82 /// in the source (e.g. a diagnostic is required for a command line option).
84 bool isValid() const { return ID != 0; }
85 bool isInvalid() const { return ID == 0; }
88 /// getOffset - Return the index for SourceManager's SLocEntryTable table,
89 /// note that this is not an index *into* it though.
90 unsigned getOffset() const {
91 return ID & ~MacroIDBit;
94 static SourceLocation getFileLoc(unsigned ID) {
95 assert((ID & MacroIDBit) == 0 && "Ran out of source locations!");
101 static SourceLocation getMacroLoc(unsigned ID) {
102 assert((ID & MacroIDBit) == 0 && "Ran out of source locations!");
104 L.ID = MacroIDBit | ID;
109 /// getFileLocWithOffset - Return a source location with the specified offset
110 /// from this file SourceLocation.
111 SourceLocation getFileLocWithOffset(int Offset) const {
112 assert(((getOffset()+Offset) & MacroIDBit) == 0 && "invalid location");
118 /// getRawEncoding - When a SourceLocation itself cannot be used, this returns
119 /// an (opaque) 32-bit integer encoding for it. This should only be passed
120 /// to SourceLocation::getFromRawEncoding, it should not be inspected
122 unsigned getRawEncoding() const { return ID; }
125 /// getFromRawEncoding - Turn a raw encoding of a SourceLocation object into
126 /// a real SourceLocation.
127 static SourceLocation getFromRawEncoding(unsigned Encoding) {
133 /// Emit - Emit this SourceLocation object to Bitcode.
134 void Emit(llvm::Serializer& S) const;
136 /// ReadVal - Read a SourceLocation object from Bitcode.
137 static SourceLocation ReadVal(llvm::Deserializer& D);
139 void print(llvm::raw_ostream &OS, const SourceManager &SM) const;
140 void dump(const SourceManager &SM) const;
143 inline bool operator==(const SourceLocation &LHS, const SourceLocation &RHS) {
144 return LHS.getRawEncoding() == RHS.getRawEncoding();
147 inline bool operator!=(const SourceLocation &LHS, const SourceLocation &RHS) {
148 return !(LHS == RHS);
151 inline bool operator<(const SourceLocation &LHS, const SourceLocation &RHS) {
152 return LHS.getRawEncoding() < RHS.getRawEncoding();
155 /// SourceRange - a trival tuple used to represent a source range.
160 SourceRange(): B(SourceLocation()), E(SourceLocation()) {}
161 SourceRange(SourceLocation loc) : B(loc), E(loc) {}
162 SourceRange(SourceLocation begin, SourceLocation end) : B(begin), E(end) {}
164 SourceLocation getBegin() const { return B; }
165 SourceLocation getEnd() const { return E; }
167 void setBegin(SourceLocation b) { B = b; }
168 void setEnd(SourceLocation e) { E = e; }
170 bool isValid() const { return B.isValid() && E.isValid(); }
172 /// Emit - Emit this SourceRange object to Bitcode.
173 void Emit(llvm::Serializer& S) const;
175 /// ReadVal - Read a SourceRange object from Bitcode.
176 static SourceRange ReadVal(llvm::Deserializer& D);
179 /// FullSourceLoc - A SourceLocation and its associated SourceManager. Useful
180 /// for argument passing to functions that expect both objects.
181 class FullSourceLoc : public SourceLocation {
182 SourceManager* SrcMgr;
184 /// Creates a FullSourceLoc where isValid() returns false.
185 explicit FullSourceLoc() : SrcMgr((SourceManager*) 0) {}
187 explicit FullSourceLoc(SourceLocation Loc, SourceManager &SM)
188 : SourceLocation(Loc), SrcMgr(&SM) {}
190 SourceManager &getManager() {
191 assert(SrcMgr && "SourceManager is NULL.");
195 const SourceManager &getManager() const {
196 assert(SrcMgr && "SourceManager is NULL.");
200 FileID getFileID() const;
202 FullSourceLoc getInstantiationLoc() const;
203 FullSourceLoc getSpellingLoc() const;
205 unsigned getInstantiationLineNumber() const;
206 unsigned getInstantiationColumnNumber() const;
208 unsigned getSpellingLineNumber() const;
209 unsigned getSpellingColumnNumber() const;
211 const char *getCharacterData() const;
213 const llvm::MemoryBuffer* getBuffer() const;
215 /// getBufferData - Return a pointer to the start and end of the source buffer
216 /// data for the specified FileID.
217 std::pair<const char*, const char*> getBufferData() const;
219 bool isInSystemHeader() const;
221 /// Prints information about this FullSourceLoc to stderr. Useful for
223 void dump() const { SourceLocation::dump(*SrcMgr); }
226 operator==(const FullSourceLoc &LHS, const FullSourceLoc &RHS) {
227 return LHS.getRawEncoding() == RHS.getRawEncoding() &&
228 LHS.SrcMgr == RHS.SrcMgr;
232 operator!=(const FullSourceLoc &LHS, const FullSourceLoc &RHS) {
233 return !(LHS == RHS);
238 /// PresumedLoc - This class represents an unpacked "presumed" location which
239 /// can be presented to the user. A 'presumed' location can be modified by
240 /// #line and GNU line marker directives and is always the instantiation point
241 /// of a normal location.
243 /// You can get a PresumedLoc from a SourceLocation with SourceManager.
245 const char *Filename;
247 SourceLocation IncludeLoc;
249 PresumedLoc() : Filename(0) {}
250 PresumedLoc(const char *FN, unsigned Ln, unsigned Co, SourceLocation IL)
251 : Filename(FN), Line(Ln), Col(Co), IncludeLoc(IL) {
254 /// isInvalid - Return true if this object is invalid or uninitialized. This
255 /// occurs when created with invalid source locations or when walking off
256 /// the top of a #include stack.
257 bool isInvalid() const { return Filename == 0; }
258 bool isValid() const { return Filename != 0; }
260 /// getFilename - Return the presumed filename of this location. This can be
261 /// affected by #line etc.
262 const char *getFilename() const { return Filename; }
264 /// getLine - Return the presumed line number of this location. This can be
265 /// affected by #line etc.
266 unsigned getLine() const { return Line; }
268 /// getColumn - Return the presumed column number of this location. This can
269 /// not be affected by #line, but is packaged here for convenience.
270 unsigned getColumn() const { return Col; }
272 /// getIncludeLoc - Return the presumed include location of this location.
273 /// This can be affected by GNU linemarker directives.
274 SourceLocation getIncludeLoc() const { return IncludeLoc; }
278 } // end namespace clang
281 /// Define DenseMapInfo so that FileID's can be used as keys in DenseMap and
284 struct DenseMapInfo<clang::FileID> {
285 static inline clang::FileID getEmptyKey() {
286 return clang::FileID();
288 static inline clang::FileID getTombstoneKey() {
289 return clang::FileID::getSentinel();
292 static unsigned getHashValue(clang::FileID S) {
293 return S.getHashValue();
296 static bool isEqual(clang::FileID LHS, clang::FileID RHS) {
300 static bool isPod() { return true; }
303 } // end namespace llvm