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Diffstat (limited to 'tools/libclang/CXSourceLocation.cpp')
| -rw-r--r-- | tools/libclang/CXSourceLocation.cpp | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/tools/libclang/CXSourceLocation.cpp b/tools/libclang/CXSourceLocation.cpp new file mode 100644 index 0000000..a6bf8fc --- /dev/null +++ b/tools/libclang/CXSourceLocation.cpp @@ -0,0 +1,326 @@ +//===- CXSourceLocation.cpp - CXSourceLocations APIs ------------*- 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 routines for manipulating CXSourceLocations. +// +//===----------------------------------------------------------------------===// + +#include "clang/Frontend/ASTUnit.h" + +#include "CIndexer.h" +#include "CXString.h" +#include "CXSourceLocation.h" +#include "CXTranslationUnit.h" +#include "CXLoadedDiagnostic.h" + +using namespace clang; +using namespace clang::cxstring; + +//===----------------------------------------------------------------------===// +// Internal predicates on CXSourceLocations. +//===----------------------------------------------------------------------===// + +static bool isASTUnitSourceLocation(const CXSourceLocation &L) { + // If the lowest bit is clear then the first ptr_data entry is a SourceManager + // pointer, or the CXSourceLocation is a null location. + return ((uintptr_t)L.ptr_data[0] & 0x1) == 0; +} + +//===----------------------------------------------------------------------===// +// Basic construction and comparison of CXSourceLocations and CXSourceRanges. +//===----------------------------------------------------------------------===// + +extern "C" { + +CXSourceLocation clang_getNullLocation() { + CXSourceLocation Result = { { 0, 0 }, 0 }; + return Result; +} + +unsigned clang_equalLocations(CXSourceLocation loc1, CXSourceLocation loc2) { + return (loc1.ptr_data[0] == loc2.ptr_data[0] && + loc1.ptr_data[1] == loc2.ptr_data[1] && + loc1.int_data == loc2.int_data); +} + +CXSourceRange clang_getNullRange() { + CXSourceRange Result = { { 0, 0 }, 0, 0 }; + return Result; +} + +CXSourceRange clang_getRange(CXSourceLocation begin, CXSourceLocation end) { + if (!isASTUnitSourceLocation(begin)) { + if (isASTUnitSourceLocation(end)) + return clang_getNullRange(); + CXSourceRange Result = { { begin.ptr_data[0], end.ptr_data[0] }, 0, 0 }; + return Result; + } + + if (begin.ptr_data[0] != end.ptr_data[0] || + begin.ptr_data[1] != end.ptr_data[1]) + return clang_getNullRange(); + + CXSourceRange Result = { { begin.ptr_data[0], begin.ptr_data[1] }, + begin.int_data, end.int_data }; + + return Result; +} + +unsigned clang_equalRanges(CXSourceRange range1, CXSourceRange range2) { + return range1.ptr_data[0] == range2.ptr_data[0] + && range1.ptr_data[1] == range2.ptr_data[1] + && range1.begin_int_data == range2.begin_int_data + && range1.end_int_data == range2.end_int_data; +} + +int clang_Range_isNull(CXSourceRange range) { + return clang_equalRanges(range, clang_getNullRange()); +} + + +CXSourceLocation clang_getRangeStart(CXSourceRange range) { + // Special decoding for CXSourceLocations for CXLoadedDiagnostics. + if ((uintptr_t)range.ptr_data[0] & 0x1) { + CXSourceLocation Result = { { range.ptr_data[0], 0 }, 0 }; + return Result; + } + + CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] }, + range.begin_int_data }; + return Result; +} + +CXSourceLocation clang_getRangeEnd(CXSourceRange range) { + // Special decoding for CXSourceLocations for CXLoadedDiagnostics. + if ((uintptr_t)range.ptr_data[0] & 0x1) { + CXSourceLocation Result = { { range.ptr_data[1], 0 }, 0 }; + return Result; + } + + CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] }, + range.end_int_data }; + return Result; +} + +} // end extern "C" + +//===----------------------------------------------------------------------===// +// Getting CXSourceLocations and CXSourceRanges from a translation unit. +//===----------------------------------------------------------------------===// + +extern "C" { + +CXSourceLocation clang_getLocation(CXTranslationUnit tu, + CXFile file, + unsigned line, + unsigned column) { + if (!tu || !file) + return clang_getNullLocation(); + + bool Logging = ::getenv("LIBCLANG_LOGGING"); + ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu->TUData); + ASTUnit::ConcurrencyCheck Check(*CXXUnit); + const FileEntry *File = static_cast<const FileEntry *>(file); + SourceLocation SLoc = CXXUnit->getLocation(File, line, column); + if (SLoc.isInvalid()) { + if (Logging) + llvm::errs() << "clang_getLocation(\"" << File->getName() + << "\", " << line << ", " << column << ") = invalid\n"; + return clang_getNullLocation(); + } + + if (Logging) + llvm::errs() << "clang_getLocation(\"" << File->getName() + << "\", " << line << ", " << column << ") = " + << SLoc.getRawEncoding() << "\n"; + + return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc); +} + +CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu, + CXFile file, + unsigned offset) { + if (!tu || !file) + return clang_getNullLocation(); + + ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu->TUData); + + SourceLocation SLoc + = CXXUnit->getLocation(static_cast<const FileEntry *>(file), offset); + + if (SLoc.isInvalid()) + return clang_getNullLocation(); + + return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc); +} + +} // end extern "C" + +//===----------------------------------------------------------------------===// +// Routines for expanding and manipulating CXSourceLocations, regardless +// of their origin. +//===----------------------------------------------------------------------===// + +static void createNullLocation(CXFile *file, unsigned *line, + unsigned *column, unsigned *offset) { + if (file) + *file = 0; + if (line) + *line = 0; + if (column) + *column = 0; + if (offset) + *offset = 0; + return; +} + +static void createNullLocation(CXString *filename, unsigned *line, + unsigned *column, unsigned *offset = 0) { + if (filename) + *filename = createCXString(""); + if (line) + *line = 0; + if (column) + *column = 0; + if (offset) + *offset = 0; + return; +} + +extern "C" { + +void clang_getExpansionLocation(CXSourceLocation location, + CXFile *file, + unsigned *line, + unsigned *column, + unsigned *offset) { + + if (!isASTUnitSourceLocation(location)) { + CXLoadedDiagnostic::decodeLocation(location, file, line, column, offset); + return; + } + + SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); + + if (!location.ptr_data[0] || Loc.isInvalid()) { + createNullLocation(file, line, column, offset); + return; + } + + const SourceManager &SM = + *static_cast<const SourceManager*>(location.ptr_data[0]); + SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc); + + // Check that the FileID is invalid on the expansion location. + // This can manifest in invalid code. + FileID fileID = SM.getFileID(ExpansionLoc); + bool Invalid = false; + const SrcMgr::SLocEntry &sloc = SM.getSLocEntry(fileID, &Invalid); + if (Invalid || !sloc.isFile()) { + createNullLocation(file, line, column, offset); + return; + } + + if (file) + *file = (void *)SM.getFileEntryForSLocEntry(sloc); + if (line) + *line = SM.getExpansionLineNumber(ExpansionLoc); + if (column) + *column = SM.getExpansionColumnNumber(ExpansionLoc); + if (offset) + *offset = SM.getDecomposedLoc(ExpansionLoc).second; +} + +void clang_getPresumedLocation(CXSourceLocation location, + CXString *filename, + unsigned *line, + unsigned *column) { + + if (!isASTUnitSourceLocation(location)) { + // Other SourceLocation implementations do not support presumed locations + // at this time. + createNullLocation(filename, line, column); + return; + } + + SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); + + if (!location.ptr_data[0] || Loc.isInvalid()) + createNullLocation(filename, line, column); + else { + const SourceManager &SM = + *static_cast<const SourceManager*>(location.ptr_data[0]); + PresumedLoc PreLoc = SM.getPresumedLoc(Loc); + + if (filename) + *filename = createCXString(PreLoc.getFilename()); + if (line) + *line = PreLoc.getLine(); + if (column) + *column = PreLoc.getColumn(); + } +} + +void clang_getInstantiationLocation(CXSourceLocation location, + CXFile *file, + unsigned *line, + unsigned *column, + unsigned *offset) { + // Redirect to new API. + clang_getExpansionLocation(location, file, line, column, offset); +} + +void clang_getSpellingLocation(CXSourceLocation location, + CXFile *file, + unsigned *line, + unsigned *column, + unsigned *offset) { + + if (!isASTUnitSourceLocation(location)) { + CXLoadedDiagnostic::decodeLocation(location, file, line, + column, offset); + return; + } + + SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data); + + if (!location.ptr_data[0] || Loc.isInvalid()) + return createNullLocation(file, line, column, offset); + + const SourceManager &SM = + *static_cast<const SourceManager*>(location.ptr_data[0]); + SourceLocation SpellLoc = Loc; + if (SpellLoc.isMacroID()) { + SourceLocation SimpleSpellingLoc = SM.getImmediateSpellingLoc(SpellLoc); + if (SimpleSpellingLoc.isFileID() && + SM.getFileEntryForID(SM.getDecomposedLoc(SimpleSpellingLoc).first)) + SpellLoc = SimpleSpellingLoc; + else + SpellLoc = SM.getExpansionLoc(SpellLoc); + } + + std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SpellLoc); + FileID FID = LocInfo.first; + unsigned FileOffset = LocInfo.second; + + if (FID.isInvalid()) + return createNullLocation(file, line, column, offset); + + if (file) + *file = (void *)SM.getFileEntryForID(FID); + if (line) + *line = SM.getLineNumber(FID, FileOffset); + if (column) + *column = SM.getColumnNumber(FID, FileOffset); + if (offset) + *offset = FileOffset; +} + +} // end extern "C" + |
