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//===--- ObjCMT.cpp - ObjC Migrate Tool -----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/ARCMigrate/ARCMTActions.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/NSAPI.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/FileManager.h"
#include "clang/Edit/Commit.h"
#include "clang/Edit/EditedSource.h"
#include "clang/Edit/EditsReceiver.h"
#include "clang/Edit/Rewriters.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/MultiplexConsumer.h"
#include "clang/Lex/PPConditionalDirectiveRecord.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "llvm/ADT/SmallString.h"
using namespace clang;
using namespace arcmt;
namespace {
class ObjCMigrateASTConsumer : public ASTConsumer {
void migrateDecl(Decl *D);
public:
std::string MigrateDir;
bool MigrateLiterals;
bool MigrateSubscripting;
llvm::OwningPtr<NSAPI> NSAPIObj;
llvm::OwningPtr<edit::EditedSource> Editor;
FileRemapper &Remapper;
FileManager &FileMgr;
const PPConditionalDirectiveRecord *PPRec;
bool IsOutputFile;
ObjCMigrateASTConsumer(StringRef migrateDir,
bool migrateLiterals,
bool migrateSubscripting,
FileRemapper &remapper,
FileManager &fileMgr,
const PPConditionalDirectiveRecord *PPRec,
bool isOutputFile = false)
: MigrateDir(migrateDir),
MigrateLiterals(migrateLiterals),
MigrateSubscripting(migrateSubscripting),
Remapper(remapper), FileMgr(fileMgr), PPRec(PPRec),
IsOutputFile(isOutputFile) { }
protected:
virtual void Initialize(ASTContext &Context) {
NSAPIObj.reset(new NSAPI(Context));
Editor.reset(new edit::EditedSource(Context.getSourceManager(),
Context.getLangOpts(),
PPRec));
}
virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
migrateDecl(*I);
return true;
}
virtual void HandleInterestingDecl(DeclGroupRef DG) {
// Ignore decls from the PCH.
}
virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef DG) {
ObjCMigrateASTConsumer::HandleTopLevelDecl(DG);
}
virtual void HandleTranslationUnit(ASTContext &Ctx);
};
}
ObjCMigrateAction::ObjCMigrateAction(FrontendAction *WrappedAction,
StringRef migrateDir,
bool migrateLiterals,
bool migrateSubscripting)
: WrapperFrontendAction(WrappedAction), MigrateDir(migrateDir),
MigrateLiterals(migrateLiterals), MigrateSubscripting(migrateSubscripting),
CompInst(0) {
if (MigrateDir.empty())
MigrateDir = "."; // user current directory if none is given.
}
ASTConsumer *ObjCMigrateAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
PPConditionalDirectiveRecord *
PPRec = new PPConditionalDirectiveRecord(CompInst->getSourceManager());
CompInst->getPreprocessor().addPPCallbacks(PPRec);
ASTConsumer *
WrappedConsumer = WrapperFrontendAction::CreateASTConsumer(CI, InFile);
ASTConsumer *MTConsumer = new ObjCMigrateASTConsumer(MigrateDir,
MigrateLiterals,
MigrateSubscripting,
Remapper,
CompInst->getFileManager(),
PPRec);
ASTConsumer *Consumers[] = { MTConsumer, WrappedConsumer };
return new MultiplexConsumer(Consumers);
}
bool ObjCMigrateAction::BeginInvocation(CompilerInstance &CI) {
Remapper.initFromDisk(MigrateDir, CI.getDiagnostics(),
/*ignoreIfFilesChanges=*/true);
CompInst = &CI;
CI.getDiagnostics().setIgnoreAllWarnings(true);
return true;
}
namespace {
class ObjCMigrator : public RecursiveASTVisitor<ObjCMigrator> {
ObjCMigrateASTConsumer &Consumer;
public:
ObjCMigrator(ObjCMigrateASTConsumer &consumer) : Consumer(consumer) { }
bool shouldVisitTemplateInstantiations() const { return false; }
bool shouldWalkTypesOfTypeLocs() const { return false; }
bool VisitObjCMessageExpr(ObjCMessageExpr *E) {
if (Consumer.MigrateLiterals) {
edit::Commit commit(*Consumer.Editor);
edit::rewriteToObjCLiteralSyntax(E, *Consumer.NSAPIObj, commit);
Consumer.Editor->commit(commit);
}
if (Consumer.MigrateSubscripting) {
edit::Commit commit(*Consumer.Editor);
edit::rewriteToObjCSubscriptSyntax(E, *Consumer.NSAPIObj, commit);
Consumer.Editor->commit(commit);
}
return true;
}
bool TraverseObjCMessageExpr(ObjCMessageExpr *E) {
// Do depth first; we want to rewrite the subexpressions first so that if
// we have to move expressions we will move them already rewritten.
for (Stmt::child_range range = E->children(); range; ++range)
if (!TraverseStmt(*range))
return false;
return WalkUpFromObjCMessageExpr(E);
}
};
}
void ObjCMigrateASTConsumer::migrateDecl(Decl *D) {
if (!D)
return;
if (isa<ObjCMethodDecl>(D))
return; // Wait for the ObjC container declaration.
ObjCMigrator(*this).TraverseDecl(D);
}
namespace {
class RewritesReceiver : public edit::EditsReceiver {
Rewriter &Rewrite;
public:
RewritesReceiver(Rewriter &Rewrite) : Rewrite(Rewrite) { }
virtual void insert(SourceLocation loc, StringRef text) {
Rewrite.InsertText(loc, text);
}
virtual void replace(CharSourceRange range, StringRef text) {
Rewrite.ReplaceText(range.getBegin(), Rewrite.getRangeSize(range), text);
}
};
}
void ObjCMigrateASTConsumer::HandleTranslationUnit(ASTContext &Ctx) {
Rewriter rewriter(Ctx.getSourceManager(), Ctx.getLangOpts());
RewritesReceiver Rec(rewriter);
Editor->applyRewrites(Rec);
for (Rewriter::buffer_iterator
I = rewriter.buffer_begin(), E = rewriter.buffer_end(); I != E; ++I) {
FileID FID = I->first;
RewriteBuffer &buf = I->second;
const FileEntry *file = Ctx.getSourceManager().getFileEntryForID(FID);
assert(file);
llvm::SmallString<512> newText;
llvm::raw_svector_ostream vecOS(newText);
buf.write(vecOS);
vecOS.flush();
llvm::MemoryBuffer *memBuf = llvm::MemoryBuffer::getMemBufferCopy(
StringRef(newText.data(), newText.size()), file->getName());
llvm::SmallString<64> filePath(file->getName());
FileMgr.FixupRelativePath(filePath);
Remapper.remap(filePath.str(), memBuf);
}
if (IsOutputFile) {
Remapper.flushToFile(MigrateDir, Ctx.getDiagnostics());
} else {
Remapper.flushToDisk(MigrateDir, Ctx.getDiagnostics());
}
}
bool MigrateSourceAction::BeginInvocation(CompilerInstance &CI) {
CI.getDiagnostics().setIgnoreAllWarnings(true);
return true;
}
ASTConsumer *MigrateSourceAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
PPConditionalDirectiveRecord *
PPRec = new PPConditionalDirectiveRecord(CI.getSourceManager());
CI.getPreprocessor().addPPCallbacks(PPRec);
return new ObjCMigrateASTConsumer(CI.getFrontendOpts().OutputFile,
/*MigrateLiterals=*/true,
/*MigrateSubscripting=*/true,
Remapper,
CI.getFileManager(),
PPRec,
/*isOutputFile=*/true);
}
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