1 //===--- SimpleFormatContext.h ----------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 /// \file 11 /// 12 /// \brief Defines a utility class for use of clang-format in libclang 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CLANG_SIMPLE_FORM_CONTEXT_H 17 #define LLVM_CLANG_SIMPLE_FORM_CONTEXT_H 18 19 #include "clang/Basic/Diagnostic.h" 20 #include "clang/Basic/DiagnosticOptions.h" 21 #include "clang/Basic/FileManager.h" 22 #include "clang/Basic/LangOptions.h" 23 #include "clang/Basic/SourceManager.h" 24 #include "clang/Rewrite/Core/Rewriter.h" 25 #include "llvm/Support/FileSystem.h" 26 #include "llvm/Support/Path.h" 27 #include "llvm/Support/raw_ostream.h" 28 29 namespace clang { 30 31 /// \brief A small class to be used by libclang clients to format 32 /// a declaration string in memory. This object is instantiated once 33 /// and used each time a formatting is needed. 34 class SimpleFormatContext { 35 public: 36 SimpleFormatContext(LangOptions Options) 37 : DiagOpts(new DiagnosticOptions()), 38 Diagnostics(new DiagnosticsEngine(new DiagnosticIDs, 39 DiagOpts.getPtr())), 40 Files((FileSystemOptions())), 41 Sources(*Diagnostics, Files), 42 Rewrite(Sources, Options) { 43 Diagnostics->setClient(new IgnoringDiagConsumer, true); 44 } 45 46 ~SimpleFormatContext() { } 47 48 FileID createInMemoryFile(StringRef Name, StringRef Content) { 49 const llvm::MemoryBuffer *Source = 50 llvm::MemoryBuffer::getMemBuffer(Content); 51 const FileEntry *Entry = 52 Files.getVirtualFile(Name, Source->getBufferSize(), 0); 53 Sources.overrideFileContents(Entry, Source, true); 54 assert(Entry != NULL); 55 return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User); 56 } 57 58 std::string getRewrittenText(FileID ID) { 59 std::string Result; 60 llvm::raw_string_ostream OS(Result); 61 Rewrite.getEditBuffer(ID).write(OS); 62 OS.flush(); 63 return Result; 64 } 65 66 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts; 67 IntrusiveRefCntPtr<DiagnosticsEngine> Diagnostics; 68 FileManager Files; 69 SourceManager Sources; 70 Rewriter Rewrite; 71 }; 72 73 } // end namespace clang 74 75 #endif 76
