forked from OSchip/llvm-project
126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
//===--- RewriterTestContext.h ----------------------------------*- 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 a utility class for Rewriter related tests.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_REWRITER_TEST_CONTEXT_H
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#define LLVM_CLANG_REWRITER_TEST_CONTEXT_H
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Frontend/DiagnosticOptions.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Rewrite/Rewriter.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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/// \brief A class that sets up a ready to use Rewriter.
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///
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/// Useful in unit tests that need a Rewriter. Creates all dependencies
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/// of a Rewriter with default values for testing and provides convenience
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/// methods, which help with writing tests that change files.
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class RewriterTestContext {
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public:
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RewriterTestContext()
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: Diagnostics(llvm::IntrusiveRefCntPtr<DiagnosticIDs>()),
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DiagnosticPrinter(llvm::outs(), DiagnosticOptions()),
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Files((FileSystemOptions())),
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Sources(Diagnostics, Files),
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Rewrite(Sources, Options) {
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Diagnostics.setClient(&DiagnosticPrinter, false);
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}
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~RewriterTestContext() {
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if (!TemporaryDirectory.empty()) {
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uint32_t RemovedCount = 0;
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llvm::sys::fs::remove_all(TemporaryDirectory.str(), RemovedCount);
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}
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}
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FileID createInMemoryFile(StringRef Name, StringRef Content) {
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const llvm::MemoryBuffer *Source =
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llvm::MemoryBuffer::getMemBuffer(Content);
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const FileEntry *Entry =
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Files.getVirtualFile(Name, Source->getBufferSize(), 0);
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Sources.overrideFileContents(Entry, Source, true);
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assert(Entry != NULL);
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return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User);
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}
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FileID createOnDiskFile(StringRef Name, StringRef Content) {
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if (TemporaryDirectory.empty()) {
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int FD;
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bool error =
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llvm::sys::fs::unique_file("rewriter-test-%%-%%-%%-%%/anchor", FD,
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TemporaryDirectory);
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assert(!error); (void)error;
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llvm::raw_fd_ostream Closer(FD, /*shouldClose=*/true);
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TemporaryDirectory = llvm::sys::path::parent_path(TemporaryDirectory);
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}
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llvm::SmallString<1024> Path(TemporaryDirectory);
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llvm::sys::path::append(Path, Name);
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std::string ErrorInfo;
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llvm::raw_fd_ostream OutStream(Path.c_str(),
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ErrorInfo, llvm::raw_fd_ostream::F_Binary);
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assert(ErrorInfo.empty());
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OutStream << Content;
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OutStream.close();
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const FileEntry *File = Files.getFile(Path);
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assert(File != NULL);
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return Sources.createFileID(File, SourceLocation(), SrcMgr::C_User);
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}
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SourceLocation getLocation(FileID ID, unsigned Line, unsigned Column) {
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SourceLocation Result = Sources.translateFileLineCol(
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Sources.getFileEntryForID(ID), Line, Column);
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assert(Result.isValid());
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return Result;
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}
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std::string getRewrittenText(FileID ID) {
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std::string Result;
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llvm::raw_string_ostream OS(Result);
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Rewrite.getEditBuffer(ID).write(OS);
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OS.flush();
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return Result;
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}
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std::string getFileContentFromDisk(StringRef Name) {
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llvm::SmallString<1024> Path(TemporaryDirectory.str());
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llvm::sys::path::append(Path, Name);
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// We need to read directly from the FileManager without relaying through
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// a FileEntry, as otherwise we'd read through an already opened file
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// descriptor, which might not see the changes made.
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// FIXME: Figure out whether there is a way to get the SourceManger to
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// reopen the file.
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return Files.getBufferForFile(Path, NULL)->getBuffer();
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}
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DiagnosticsEngine Diagnostics;
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TextDiagnosticPrinter DiagnosticPrinter;
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FileManager Files;
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SourceManager Sources;
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LangOptions Options;
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Rewriter Rewrite;
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// Will be set once on disk files are generated.
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SmallString<128> TemporaryDirectory;
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};
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} // end namespace clang
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#endif
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