cp11-migrate: Integration with LibFormat

Adding a feature to optionally reformat code changed by the migrator. Like
LibFormat, can choose between built-in styles (LLVM, Mozilla, Google, Chromium)
or use a YAML-format config file.

Author: Guillaume Papin <guillaume.papin@epitech.eu>
llvm-svn: 186866

1 files changed, 76 insertions, 0 deletions

diff --git a/clang-tools-extra/cpp11-migrate/Core/Reformatting.cpp b/clang-tools-extra/cpp11-migrate/Core/Reformatting.cpp
new file mode 100644
index 00000000000..3fd77612bbf
--- /dev/null
+++ b/clang-tools-extra/cpp11-migrate/Core/Reformatting.cpp
@@ -0,0 +1,76 @@
+//===-- Core/Reformatting.cpp - LibFormat integration ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file provides the LibFormat integration used to reformat
+/// migrated code.
+///
+//===----------------------------------------------------------------------===//
+
+#include "Core/Reformatting.h"
+#include "Core/FileOverrides.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Lex/Lexer.h"
+
+using namespace clang;
+
+void Reformatter::reformatChanges(SourceOverrides &Overrides) {
+  llvm::IntrusiveRefCntPtr<clang::DiagnosticOptions> DiagOpts(
+      new DiagnosticOptions());
+  DiagnosticsEngine Diagnostics(
+      llvm::IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()),
+      DiagOpts.getPtr());
+  FileManager Files((FileSystemOptions()));
+  SourceManager SM(Diagnostics, Files);
+
+  reformatChanges(Overrides, SM);
+}
+
+void Reformatter::reformatChanges(SourceOverrides &Overrides,
+                                  clang::SourceManager &SM) {
+  tooling::Replacements Replaces;
+  Overrides.applyOverrides(SM);
+  if (Overrides.isSourceOverriden())
+    Replaces = reformatSingleFile(Overrides.getMainFileName(),
+                                  Overrides.getChangedRanges(), SM);
+
+  for (HeaderOverrides::const_iterator I = Overrides.headers_begin(),
+                                       E = Overrides.headers_end();
+       I != E; ++I) {
+    const HeaderOverride &Header = I->getValue();
+    const tooling::Replacements &HeaderReplaces =
+        reformatSingleFile(Header.FileName, Header.Changes, SM);
+    Replaces.insert(HeaderReplaces.begin(), HeaderReplaces.end());
+  }
+  Overrides.applyReplacements(Replaces, SM);
+}
+
+tooling::Replacements Reformatter::reformatSingleFile(
+    llvm::StringRef FileName, const ChangedRanges &Changes, SourceManager &SM) {
+  const clang::FileEntry *Entry = SM.getFileManager().getFile(FileName);
+  assert(Entry && "expected an existing file");
+
+  FileID ID = SM.translateFile(Entry);
+  if (ID.isInvalid())
+    ID = SM.createFileID(Entry, SourceLocation(), clang::SrcMgr::C_User);
+
+  std::vector<CharSourceRange> ReformatRanges;
+  SourceLocation StartOfFile = SM.getLocForStartOfFile(ID);
+  for (ChangedRanges::const_iterator I = Changes.begin(), E = Changes.end();
+       I != E; ++I) {
+    SourceLocation Start = StartOfFile.getLocWithOffset(I->getOffset());
+    SourceLocation End = Start.getLocWithOffset(I->getLength());
+    ReformatRanges.push_back(CharSourceRange::getCharRange(Start, End));
+  }
+
+  Lexer Lex(ID, SM.getBuffer(ID), SM, getFormattingLangOpts(Style.Standard));
+  return format::reformat(Style, Lex, SM, ReformatRanges);
+}