| 1 | //===--- SimpleFormatContext.h ----------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | /// \file |
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| 10 | /// |
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| 11 | /// Defines a utility class for use of clang-format in libclang |
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| 12 | // |
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| 13 | //===----------------------------------------------------------------------===// |
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| 14 | |
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| 15 | #ifndef LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H |
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| 16 | #define LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H |
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| 17 | |
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| 18 | #include "clang/Basic/Diagnostic.h" |
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| 19 | #include "clang/Basic/DiagnosticOptions.h" |
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| 20 | #include "clang/Basic/FileManager.h" |
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| 21 | #include "clang/Basic/LangOptions.h" |
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| 22 | #include "clang/Basic/SourceManager.h" |
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| 23 | #include "clang/Rewrite/Core/Rewriter.h" |
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| 24 | #include "llvm/Support/FileSystem.h" |
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| 25 | #include "llvm/Support/Path.h" |
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| 26 | #include "llvm/Support/raw_ostream.h" |
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| 27 | |
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| 28 | namespace clang { |
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| 29 | namespace index { |
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| 30 | |
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| 31 | /// A small class to be used by libclang clients to format |
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| 32 | /// a declaration string in memory. This object is instantiated once |
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| 33 | /// and used each time a formatting is needed. |
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| 34 | class SimpleFormatContext { |
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| 35 | public: |
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| 36 | SimpleFormatContext(LangOptions Options) |
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| 37 | : DiagOpts(new DiagnosticOptions()), |
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| 38 | Diagnostics(new DiagnosticsEngine(new DiagnosticIDs, DiagOpts.get())), |
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| 39 | InMemoryFileSystem(new llvm::vfs::InMemoryFileSystem), |
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| 40 | Files(FileSystemOptions(), InMemoryFileSystem), |
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| 41 | Sources(*Diagnostics, Files), Rewrite(Sources, Options) { |
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| 42 | Diagnostics->setClient(new IgnoringDiagConsumer, true); |
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| 43 | } |
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| 44 | |
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| 45 | FileID createInMemoryFile(StringRef Name, StringRef Content) { |
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| 46 | InMemoryFileSystem->addFile(Name, 0, |
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| 47 | llvm::MemoryBuffer::getMemBuffer(Content)); |
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| 48 | const FileEntry *Entry = Files.getFile(Name); |
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| 49 | assert(Entry != nullptr); |
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| 50 | return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User); |
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| 51 | } |
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| 52 | |
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| 53 | std::string getRewrittenText(FileID ID) { |
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| 54 | std::string Result; |
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| 55 | llvm::raw_string_ostream OS(Result); |
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| 56 | Rewrite.getEditBuffer(ID).write(OS); |
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| 57 | OS.flush(); |
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| 58 | return Result; |
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| 59 | } |
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| 60 | |
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| 61 | IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts; |
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| 62 | IntrusiveRefCntPtr<DiagnosticsEngine> Diagnostics; |
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| 63 | IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem; |
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| 64 | FileManager Files; |
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| 65 | SourceManager Sources; |
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| 66 | Rewriter Rewrite; |
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| 67 | }; |
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| 68 | |
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| 69 | } // end namespace index |
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| 70 | } // end namespace clang |
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| 71 | |
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| 72 | #endif |
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| 73 | |
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