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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
374 lines
12 KiB
C++
374 lines
12 KiB
C++
//===- CXSourceLocation.cpp - CXSourceLocations APIs ------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 "CLog.h"
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#include "CXLoadedDiagnostic.h"
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#include "CXSourceLocation.h"
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#include "CXString.h"
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#include "CXTranslationUnit.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Format.h"
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using namespace clang;
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using namespace clang::cxindex;
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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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CXSourceLocation clang_getNullLocation() {
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CXSourceLocation Result = { { nullptr, nullptr }, 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 = { { nullptr, nullptr }, 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], nullptr }, 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], nullptr }, 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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//===----------------------------------------------------------------------===//
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// Getting CXSourceLocations and CXSourceRanges from a translation unit.
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//===----------------------------------------------------------------------===//
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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 (cxtu::isNotUsableTU(TU)) {
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LOG_BAD_TU(TU);
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return clang_getNullLocation();
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}
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if (!file)
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return clang_getNullLocation();
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if (line == 0 || column == 0)
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return clang_getNullLocation();
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LogRef Log = Logger::make(__func__);
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ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
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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 (Log)
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*Log << llvm::format("(\"%s\", %d, %d) = invalid",
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File->getName().str().c_str(), line, column);
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return clang_getNullLocation();
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}
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CXSourceLocation CXLoc =
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cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
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if (Log)
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*Log << llvm::format("(\"%s\", %d, %d) = ", File->getName().str().c_str(),
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line, column)
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<< CXLoc;
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return CXLoc;
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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 (cxtu::isNotUsableTU(TU)) {
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LOG_BAD_TU(TU);
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return clang_getNullLocation();
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}
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if (!file)
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return clang_getNullLocation();
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ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
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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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//===----------------------------------------------------------------------===//
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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 = nullptr;
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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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}
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static void createNullLocation(CXString *filename, unsigned *line,
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unsigned *column, unsigned *offset = nullptr) {
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if (filename)
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*filename = cxstring::createEmpty();
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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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}
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int clang_Location_isInSystemHeader(CXSourceLocation location) {
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const SourceLocation Loc =
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SourceLocation::getFromRawEncoding(location.int_data);
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if (Loc.isInvalid())
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return 0;
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const SourceManager &SM =
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*static_cast<const SourceManager*>(location.ptr_data[0]);
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return SM.isInSystemHeader(Loc);
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}
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int clang_Location_isFromMainFile(CXSourceLocation location) {
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const SourceLocation Loc =
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SourceLocation::getFromRawEncoding(location.int_data);
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if (Loc.isInvalid())
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return 0;
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const SourceManager &SM =
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*static_cast<const SourceManager*>(location.ptr_data[0]);
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return SM.isWrittenInMainFile(Loc);
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}
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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 = const_cast<FileEntry *>(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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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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PresumedLoc PreLoc = SM.getPresumedLoc(Loc);
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if (PreLoc.isInvalid()) {
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createNullLocation(filename, line, column);
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return;
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}
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if (filename) *filename = cxstring::createRef(PreLoc.getFilename());
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if (line) *line = PreLoc.getLine();
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if (column) *column = PreLoc.getColumn();
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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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// FIXME: This should call SourceManager::getSpellingLoc().
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SourceLocation SpellLoc = SM.getFileLoc(Loc);
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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 = const_cast<FileEntry *>(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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void clang_getFileLocation(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 FileLoc = SM.getFileLoc(Loc);
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std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(FileLoc);
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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 = const_cast<FileEntry *>(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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