1 //===- CXSourceLocation.cpp - CXSourceLocations APIs ------------*- 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 routines for manipulating CXSourceLocations. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Frontend/ASTUnit.h" 15 #include "CIndexer.h" 16 #include "CLog.h" 17 #include "CXLoadedDiagnostic.h" 18 #include "CXSourceLocation.h" 19 #include "CXString.h" 20 #include "CXTranslationUnit.h" 21 #include "llvm/Support/Compiler.h" 22 #include "llvm/Support/Format.h" 23 24 using namespace clang; 25 using namespace clang::cxindex; 26 27 //===----------------------------------------------------------------------===// 28 // Internal predicates on CXSourceLocations. 29 //===----------------------------------------------------------------------===// 30 31 static bool isASTUnitSourceLocation(const CXSourceLocation &L) { 32 // If the lowest bit is clear then the first ptr_data entry is a SourceManager 33 // pointer, or the CXSourceLocation is a null location. 34 return ((uintptr_t)L.ptr_data[0] & 0x1) == 0; 35 } 36 37 //===----------------------------------------------------------------------===// 38 // Basic construction and comparison of CXSourceLocations and CXSourceRanges. 39 //===----------------------------------------------------------------------===// 40 41 extern "C" { 42 43 CXSourceLocation clang_getNullLocation() { 44 CXSourceLocation Result = { { 0, 0 }, 0 }; 45 return Result; 46 } 47 48 unsigned clang_equalLocations(CXSourceLocation loc1, CXSourceLocation loc2) { 49 return (loc1.ptr_data[0] == loc2.ptr_data[0] && 50 loc1.ptr_data[1] == loc2.ptr_data[1] && 51 loc1.int_data == loc2.int_data); 52 } 53 54 CXSourceRange clang_getNullRange() { 55 CXSourceRange Result = { { 0, 0 }, 0, 0 }; 56 return Result; 57 } 58 59 CXSourceRange clang_getRange(CXSourceLocation begin, CXSourceLocation end) { 60 if (!isASTUnitSourceLocation(begin)) { 61 if (isASTUnitSourceLocation(end)) 62 return clang_getNullRange(); 63 CXSourceRange Result = { { begin.ptr_data[0], end.ptr_data[0] }, 0, 0 }; 64 return Result; 65 } 66 67 if (begin.ptr_data[0] != end.ptr_data[0] || 68 begin.ptr_data[1] != end.ptr_data[1]) 69 return clang_getNullRange(); 70 71 CXSourceRange Result = { { begin.ptr_data[0], begin.ptr_data[1] }, 72 begin.int_data, end.int_data }; 73 74 return Result; 75 } 76 77 unsigned clang_equalRanges(CXSourceRange range1, CXSourceRange range2) { 78 return range1.ptr_data[0] == range2.ptr_data[0] 79 && range1.ptr_data[1] == range2.ptr_data[1] 80 && range1.begin_int_data == range2.begin_int_data 81 && range1.end_int_data == range2.end_int_data; 82 } 83 84 int clang_Range_isNull(CXSourceRange range) { 85 return clang_equalRanges(range, clang_getNullRange()); 86 } 87 88 89 CXSourceLocation clang_getRangeStart(CXSourceRange range) { 90 // Special decoding for CXSourceLocations for CXLoadedDiagnostics. 91 if ((uintptr_t)range.ptr_data[0] & 0x1) { 92 CXSourceLocation Result = { { range.ptr_data[0], 0 }, 0 }; 93 return Result; 94 } 95 96 CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] }, 97 range.begin_int_data }; 98 return Result; 99 } 100 101 CXSourceLocation clang_getRangeEnd(CXSourceRange range) { 102 // Special decoding for CXSourceLocations for CXLoadedDiagnostics. 103 if ((uintptr_t)range.ptr_data[0] & 0x1) { 104 CXSourceLocation Result = { { range.ptr_data[1], 0 }, 0 }; 105 return Result; 106 } 107 108 CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] }, 109 range.end_int_data }; 110 return Result; 111 } 112 113 } // end extern "C" 114 115 //===----------------------------------------------------------------------===// 116 // Getting CXSourceLocations and CXSourceRanges from a translation unit. 117 //===----------------------------------------------------------------------===// 118 119 extern "C" { 120 121 CXSourceLocation clang_getLocation(CXTranslationUnit TU, 122 CXFile file, 123 unsigned line, 124 unsigned column) { 125 if (!TU || !file) 126 return clang_getNullLocation(); 127 128 LogRef Log = Logger::make(LLVM_FUNCTION_NAME); 129 ASTUnit *CXXUnit = cxtu::getASTUnit(TU); 130 ASTUnit::ConcurrencyCheck Check(*CXXUnit); 131 const FileEntry *File = static_cast<const FileEntry *>(file); 132 SourceLocation SLoc = CXXUnit->getLocation(File, line, column); 133 if (SLoc.isInvalid()) { 134 if (Log) 135 *Log << llvm::format("(\"%s\", %d, %d) = invalid", 136 File->getName(), line, column); 137 return clang_getNullLocation(); 138 } 139 140 CXSourceLocation CXLoc = 141 cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc); 142 if (Log) 143 *Log << llvm::format("(\"%s\", %d, %d) = ", File->getName(), line, column) 144 << CXLoc; 145 146 return CXLoc; 147 } 148 149 CXSourceLocation clang_getLocationForOffset(CXTranslationUnit TU, 150 CXFile file, 151 unsigned offset) { 152 if (!TU || !file) 153 return clang_getNullLocation(); 154 155 ASTUnit *CXXUnit = cxtu::getASTUnit(TU); 156 157 SourceLocation SLoc 158 = CXXUnit->getLocation(static_cast<const FileEntry *>(file), offset); 159 160 if (SLoc.isInvalid()) 161 return clang_getNullLocation(); 162 163 return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc); 164 } 165 166 } // end extern "C" 167 168 //===----------------------------------------------------------------------===// 169 // Routines for expanding and manipulating CXSourceLocations, regardless 170 // of their origin. 171 //===----------------------------------------------------------------------===// 172 173 static void createNullLocation(CXFile *file, unsigned *line, 174 unsigned *column, unsigned *offset) { 175 if (file) 176 *file = 0; 177 if (line) 178 *line = 0; 179 if (column) 180 *column = 0; 181 if (offset) 182 *offset = 0; 183 return; 184 } 185 186 static void createNullLocation(CXString *filename, unsigned *line, 187 unsigned *column, unsigned *offset = 0) { 188 if (filename) 189 *filename = cxstring::createEmpty(); 190 if (line) 191 *line = 0; 192 if (column) 193 *column = 0; 194 if (offset) 195 *offset = 0; 196 return; 197 } 198 199 extern "C" { 200 201 int clang_Location_isInSystemHeader(CXSourceLocation location) { 202 const SourceLocation Loc = 203 SourceLocation::getFromRawEncoding(location.int_data); 204 if (Loc.isInvalid()) 205 return 0; 206 207 const SourceManager &SM = 208 *static_cast<const SourceManager*>(location.ptr_data[0]); 209 return SM.isInSystemHeader(Loc); 210 } 211 212 void clang_getExpansionLocation(CXSourceLocation location, 213 CXFile *file, 214 unsigned *line, 215 unsigned *column, 216 unsigned *offset) { 217 218 if (!isASTUnitSourceLocation(location)) { 219 CXLoadedDiagnostic::decodeLocation(location, file, line, column, offset); 220 return; 221 } 222 223 SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); 224 225 if (!location.ptr_data[0] || Loc.isInvalid()) { 226 createNullLocation(file, line, column, offset); 227 return; 228 } 229 230 const SourceManager &SM = 231 *static_cast<const SourceManager*>(location.ptr_data[0]); 232 SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc); 233 234 // Check that the FileID is invalid on the expansion location. 235 // This can manifest in invalid code. 236 FileID fileID = SM.getFileID(ExpansionLoc); 237 bool Invalid = false; 238 const SrcMgr::SLocEntry &sloc = SM.getSLocEntry(fileID, &Invalid); 239 if (Invalid || !sloc.isFile()) { 240 createNullLocation(file, line, column, offset); 241 return; 242 } 243 244 if (file) 245 *file = const_cast<FileEntry *>(SM.getFileEntryForSLocEntry(sloc)); 246 if (line) 247 *line = SM.getExpansionLineNumber(ExpansionLoc); 248 if (column) 249 *column = SM.getExpansionColumnNumber(ExpansionLoc); 250 if (offset) 251 *offset = SM.getDecomposedLoc(ExpansionLoc).second; 252 } 253 254 void clang_getPresumedLocation(CXSourceLocation location, 255 CXString *filename, 256 unsigned *line, 257 unsigned *column) { 258 259 if (!isASTUnitSourceLocation(location)) { 260 // Other SourceLocation implementations do not support presumed locations 261 // at this time. 262 createNullLocation(filename, line, column); 263 return; 264 } 265 266 SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); 267 268 if (!location.ptr_data[0] || Loc.isInvalid()) 269 createNullLocation(filename, line, column); 270 else { 271 const SourceManager &SM = 272 *static_cast<const SourceManager*>(location.ptr_data[0]); 273 PresumedLoc PreLoc = SM.getPresumedLoc(Loc); 274 275 if (filename) 276 *filename = cxstring::createRef(PreLoc.getFilename()); 277 if (line) 278 *line = PreLoc.getLine(); 279 if (column) 280 *column = PreLoc.getColumn(); 281 } 282 } 283 284 void clang_getInstantiationLocation(CXSourceLocation location, 285 CXFile *file, 286 unsigned *line, 287 unsigned *column, 288 unsigned *offset) { 289 // Redirect to new API. 290 clang_getExpansionLocation(location, file, line, column, offset); 291 } 292 293 void clang_getSpellingLocation(CXSourceLocation location, 294 CXFile *file, 295 unsigned *line, 296 unsigned *column, 297 unsigned *offset) { 298 299 if (!isASTUnitSourceLocation(location)) { 300 CXLoadedDiagnostic::decodeLocation(location, file, line, 301 column, offset); 302 return; 303 } 304 305 SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); 306 307 if (!location.ptr_data[0] || Loc.isInvalid()) 308 return createNullLocation(file, line, column, offset); 309 310 const SourceManager &SM = 311 *static_cast<const SourceManager*>(location.ptr_data[0]); 312 // FIXME: This should call SourceManager::getSpellingLoc(). 313 SourceLocation SpellLoc = SM.getFileLoc(Loc); 314 std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SpellLoc); 315 FileID FID = LocInfo.first; 316 unsigned FileOffset = LocInfo.second; 317 318 if (FID.isInvalid()) 319 return createNullLocation(file, line, column, offset); 320 321 if (file) 322 *file = const_cast<FileEntry *>(SM.getFileEntryForID(FID)); 323 if (line) 324 *line = SM.getLineNumber(FID, FileOffset); 325 if (column) 326 *column = SM.getColumnNumber(FID, FileOffset); 327 if (offset) 328 *offset = FileOffset; 329 } 330 331 void clang_getFileLocation(CXSourceLocation location, 332 CXFile *file, 333 unsigned *line, 334 unsigned *column, 335 unsigned *offset) { 336 337 if (!isASTUnitSourceLocation(location)) { 338 CXLoadedDiagnostic::decodeLocation(location, file, line, 339 column, offset); 340 return; 341 } 342 343 SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); 344 345 if (!location.ptr_data[0] || Loc.isInvalid()) 346 return createNullLocation(file, line, column, offset); 347 348 const SourceManager &SM = 349 *static_cast<const SourceManager*>(location.ptr_data[0]); 350 SourceLocation FileLoc = SM.getFileLoc(Loc); 351 std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(FileLoc); 352 FileID FID = LocInfo.first; 353 unsigned FileOffset = LocInfo.second; 354 355 if (FID.isInvalid()) 356 return createNullLocation(file, line, column, offset); 357 358 if (file) 359 *file = const_cast<FileEntry *>(SM.getFileEntryForID(FID)); 360 if (line) 361 *line = SM.getLineNumber(FID, FileOffset); 362 if (column) 363 *column = SM.getColumnNumber(FID, FileOffset); 364 if (offset) 365 *offset = FileOffset; 366 } 367 368 } // end extern "C" 369
