1 files changed, 193 insertions, 0 deletions
diff --git a/tools/clang-format/ClangFormat.cpp b/tools/clang-format/ClangFormat.cpp
new file mode 100644
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+++ b/tools/clang-format/ClangFormat.cpp
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+//===-- clang-format/ClangFormat.cpp - Clang format tool ------------------===//
+//
+//                     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 implements a clang-format tool that automatically formats
+/// (fragments of) C++ code.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Format/Format.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Rewrite/Core/Rewriter.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Signals.h"
+
+using namespace llvm;
+
+static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden);
+
+static cl::list<unsigned>
+Offsets("offset", cl::desc("Format a range starting at this file offset. Can "
+                           "only be used with one input file."));
+static cl::list<unsigned>
+Lengths("length", cl::desc("Format a range of this length. "
+                           "When it's not specified, end of file is used. "
+                           "Can only be used with one input file."));
+static cl::opt<std::string> Style(
+    "style",
+    cl::desc("Coding style, currently supports: LLVM, Google, Chromium, Mozilla."),
+    cl::init("LLVM"));
+static cl::opt<bool> Inplace("i",
+                             cl::desc("Inplace edit <file>s, if specified."));
+
+static cl::opt<bool> OutputXML(
+    "output-replacements-xml", cl::desc("Output replacements as XML."));
+
+static cl::list<std::string> FileNames(cl::Positional,
+                                       cl::desc("[<file> ...]"));
+
+namespace clang {
+namespace format {
+
+static FileID createInMemoryFile(StringRef FileName, const MemoryBuffer *Source,
+                                 SourceManager &Sources, FileManager &Files) {
+  const FileEntry *Entry = Files.getVirtualFile(FileName == "-" ? "<stdin>" :
+                                                    FileName,
+                                                Source->getBufferSize(), 0);
+  Sources.overrideFileContents(Entry, Source, true);
+  return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User);
+}
+
+static FormatStyle getStyle() {
+  FormatStyle TheStyle = getGoogleStyle();
+  if (Style == "LLVM")
+    TheStyle = getLLVMStyle();
+  else if (Style == "Chromium")
+    TheStyle = getChromiumStyle();
+  else if (Style == "Mozilla")
+    TheStyle = getMozillaStyle();
+  else if (Style != "Google")
+    llvm::errs() << "Unknown style " << Style << ", using Google style.\n";
+
+  return TheStyle;
+}
+
+// Returns true on error.
+static bool format(std::string FileName) {
+  FileManager Files((FileSystemOptions()));
+  DiagnosticsEngine Diagnostics(
+      IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
+      new DiagnosticOptions);
+  SourceManager Sources(Diagnostics, Files);
+  OwningPtr<MemoryBuffer> Code;
+  if (error_code ec = MemoryBuffer::getFileOrSTDIN(FileName, Code)) {
+    llvm::errs() << ec.message() << "\n";
+    return true;
+  }
+  FileID ID = createInMemoryFile(FileName, Code.get(), Sources, Files);
+  Lexer Lex(ID, Sources.getBuffer(ID), Sources, getFormattingLangOpts());
+  if (Offsets.empty())
+    Offsets.push_back(0);
+  if (Offsets.size() != Lengths.size() &&
+      !(Offsets.size() == 1 && Lengths.empty())) {
+    llvm::errs()
+        << "error: number of -offset and -length arguments must match.\n";
+    return true;
+  }
+  std::vector<CharSourceRange> Ranges;
+  for (unsigned i = 0, e = Offsets.size(); i != e; ++i) {
+    if (Offsets[i] >= Code->getBufferSize()) {
+      llvm::errs() << "error: offset " << Offsets[i]
+                   << " is outside the file\n";
+      return true;
+    }
+    SourceLocation Start =
+        Sources.getLocForStartOfFile(ID).getLocWithOffset(Offsets[i]);
+    SourceLocation End;
+    if (i < Lengths.size()) {
+      if (Offsets[i] + Lengths[i] > Code->getBufferSize()) {
+        llvm::errs() << "error: invalid length " << Lengths[i]
+                     << ", offset + length (" << Offsets[i] + Lengths[i]
+                     << ") is outside the file.\n";
+        return true;
+      }
+      End = Start.getLocWithOffset(Lengths[i]);
+    } else {
+      End = Sources.getLocForEndOfFile(ID);
+    }
+    Ranges.push_back(CharSourceRange::getCharRange(Start, End));
+  }
+  tooling::Replacements Replaces = reformat(getStyle(), Lex, Sources, Ranges);
+  if (OutputXML) {
+    llvm::outs()
+        << "<?xml version='1.0'?>\n<replacements xml:space='preserve'>\n";
+    for (tooling::Replacements::const_iterator I = Replaces.begin(),
+                                               E = Replaces.end();
+         I != E; ++I) {
+      llvm::outs() << "<replacement "
+                   << "offset='" << I->getOffset() << "' "
+                   << "length='" << I->getLength() << "'>"
+                   << I->getReplacementText() << "</replacement>\n";
+    }
+    llvm::outs() << "</replacements>\n";
+  } else {
+    Rewriter Rewrite(Sources, LangOptions());
+    tooling::applyAllReplacements(Replaces, Rewrite);
+    if (Inplace) {
+      if (Replaces.size() == 0)
+        return false; // Nothing changed, don't touch the file.
+
+      std::string ErrorInfo;
+      llvm::raw_fd_ostream FileStream(FileName.c_str(), ErrorInfo,
+                                      llvm::raw_fd_ostream::F_Binary);
+      if (!ErrorInfo.empty()) {
+        llvm::errs() << "Error while writing file: " << ErrorInfo << "\n";
+        return true;
+      }
+      Rewrite.getEditBuffer(ID).write(FileStream);
+      FileStream.flush();
+    } else {
+      Rewrite.getEditBuffer(ID).write(outs());
+    }
+  }
+  return false;
+}
+
+}  // namespace format
+}  // namespace clang
+
+int main(int argc, const char **argv) {
+  llvm::sys::PrintStackTraceOnErrorSignal();
+  cl::ParseCommandLineOptions(
+      argc, argv,
+      "A tool to format C/C++/Obj-C code.\n\n"
+      "If no arguments are specified, it formats the code from standard input\n"
+      "and writes the result to the standard output.\n"
+      "If <file>s are given, it reformats the files. If -i is specified \n"
+      "together with <file>s, the files are edited in-place. Otherwise, the \n"
+      "result is written to the standard output.\n");
+
+  if (Help)
+    cl::PrintHelpMessage();
+
+  bool Error = false;
+  switch (FileNames.size()) {
+  case 0:
+    Error = clang::format::format("-");
+    break;
+  case 1:
+    Error = clang::format::format(FileNames[0]);
+    break;
+  default:
+    if (!Offsets.empty() || !Lengths.empty()) {
+      llvm::errs() << "error: \"-offset\" and \"-length\" can only be used for "
+                      "single file.\n";
+      return 1;
+    }
+    for (unsigned i = 0; i < FileNames.size(); ++i)
+      Error |= clang::format::format(FileNames[i]);
+    break;
+  }
+  return Error ? 1 : 0;
+}