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