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| //===- CXSourceLocation.cpp - CXSourceLocations APIs ------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines routines for manipulating CXSourceLocations.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/ASTUnit.h"
#include "CIndexer.h"
#include "CLog.h"
#include "CXLoadedDiagnostic.h"
#include "CXSourceLocation.h"
#include "CXString.h"
#include "CXTranslationUnit.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
using namespace clang;
using namespace clang::cxindex;
//===----------------------------------------------------------------------===//
// 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.
//===----------------------------------------------------------------------===//
CXSourceLocation clang_getNullLocation() {
CXSourceLocation Result = { { nullptr, nullptr }, 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 = { { nullptr, nullptr }, 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], nullptr }, 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], nullptr }, 0 };
return Result;
}
CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] },
range.end_int_data };
return Result;
}
//===----------------------------------------------------------------------===//
// Getting CXSourceLocations and CXSourceRanges from a translation unit.
//===----------------------------------------------------------------------===//
CXSourceLocation clang_getLocation(CXTranslationUnit TU,
CXFile file,
unsigned line,
unsigned column) {
if (cxtu::isNotUsableTU(TU)) {
LOG_BAD_TU(TU);
return clang_getNullLocation();
}
if (!file)
return clang_getNullLocation();
if (line == 0 || column == 0)
return clang_getNullLocation();
LogRef Log = Logger::make(__func__);
ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
ASTUnit::ConcurrencyCheck Check(*CXXUnit);
const FileEntry *File = static_cast<const FileEntry *>(file);
SourceLocation SLoc = CXXUnit->getLocation(File, line, column);
if (SLoc.isInvalid()) {
if (Log)
*Log << llvm::format("(\"%s\", %d, %d) = invalid",
File->getName().str().c_str(), line, column);
return clang_getNullLocation();
}
CXSourceLocation CXLoc =
cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
if (Log)
*Log << llvm::format("(\"%s\", %d, %d) = ", File->getName().str().c_str(),
line, column)
<< CXLoc;
return CXLoc;
}
CXSourceLocation clang_getLocationForOffset(CXTranslationUnit TU,
CXFile file,
unsigned offset) {
if (cxtu::isNotUsableTU(TU)) {
LOG_BAD_TU(TU);
return clang_getNullLocation();
}
if (!file)
return clang_getNullLocation();
ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
SourceLocation SLoc
= CXXUnit->getLocation(static_cast<const FileEntry *>(file), offset);
if (SLoc.isInvalid())
return clang_getNullLocation();
return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
}
//===----------------------------------------------------------------------===//
// Routines for expanding and manipulating CXSourceLocations, regardless
// of their origin.
//===----------------------------------------------------------------------===//
static void createNullLocation(CXFile *file, unsigned *line,
unsigned *column, unsigned *offset) {
if (file)
*file = nullptr;
if (line)
*line = 0;
if (column)
*column = 0;
if (offset)
*offset = 0;
}
static void createNullLocation(CXString *filename, unsigned *line,
unsigned *column, unsigned *offset = nullptr) {
if (filename)
*filename = cxstring::createEmpty();
if (line)
*line = 0;
if (column)
*column = 0;
if (offset)
*offset = 0;
}
int clang_Location_isInSystemHeader(CXSourceLocation location) {
const SourceLocation Loc =
SourceLocation::getFromRawEncoding(location.int_data);
if (Loc.isInvalid())
return 0;
const SourceManager &SM =
*static_cast<const SourceManager*>(location.ptr_data[0]);
return SM.isInSystemHeader(Loc);
}
int clang_Location_isFromMainFile(CXSourceLocation location) {
const SourceLocation Loc =
SourceLocation::getFromRawEncoding(location.int_data);
if (Loc.isInvalid())
return 0;
const SourceManager &SM =
*static_cast<const SourceManager*>(location.ptr_data[0]);
return SM.isWrittenInMainFile(Loc);
}
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 = const_cast<FileEntry *>(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);
return;
}
const SourceManager &SM =
*static_cast<const SourceManager *>(location.ptr_data[0]);
PresumedLoc PreLoc = SM.getPresumedLoc(Loc);
if (PreLoc.isInvalid()) {
createNullLocation(filename, line, column);
return;
}
if (filename) *filename = cxstring::createRef(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]);
// FIXME: This should call SourceManager::getSpellingLoc().
SourceLocation SpellLoc = SM.getFileLoc(Loc);
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 = const_cast<FileEntry *>(SM.getFileEntryForID(FID));
if (line)
*line = SM.getLineNumber(FID, FileOffset);
if (column)
*column = SM.getColumnNumber(FID, FileOffset);
if (offset)
*offset = FileOffset;
}
void clang_getFileLocation(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 FileLoc = SM.getFileLoc(Loc);
std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(FileLoc);
FileID FID = LocInfo.first;
unsigned FileOffset = LocInfo.second;
if (FID.isInvalid())
return createNullLocation(file, line, column, offset);
if (file)
*file = const_cast<FileEntry *>(SM.getFileEntryForID(FID));
if (line)
*line = SM.getLineNumber(FID, FileOffset);
if (column)
*column = SM.getColumnNumber(FID, FileOffset);
if (offset)
*offset = FileOffset;
}
|