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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"
using namespace llvm;
static cl::opt<int> Offset(
"offset", cl::desc("Format a range starting at this file offset."),
cl::init(0));
static cl::opt<int> Length(
"length", cl::desc("Format a range of this length, -1 for end of file."),
cl::init(-1));
static cl::opt<std::string> Style(
"style", cl::desc("Coding style, currently supports: LLVM, Google."),
cl::init("LLVM"));
namespace clang {
namespace format {
static FileID createInMemoryFile(const MemoryBuffer *Source,
SourceManager &Sources,
FileManager &Files) {
const FileEntry *Entry =
Files.getVirtualFile("<stdio>", Source->getBufferSize(), 0);
Sources.overrideFileContents(Entry, Source, true);
return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User);
}
static void format() {
FileManager Files((FileSystemOptions()));
DiagnosticsEngine Diagnostics(IntrusiveRefCntPtr<DiagnosticIDs>(
new DiagnosticIDs), new DiagnosticOptions);
SourceManager Sources(Diagnostics, Files);
OwningPtr<MemoryBuffer> Code;
if (error_code ec = MemoryBuffer::getSTDIN(Code)) {
llvm::errs() << ec.message() << "\n";
return;
}
FileID ID = createInMemoryFile(Code.get(), Sources, Files);
// FIXME: Pull this out into a common method and use here and in the tests.
LangOptions LangOpts;
LangOpts.CPlusPlus = 1;
LangOpts.CPlusPlus11 = 1;
Lexer Lex(ID, Sources.getBuffer(ID), Sources, LangOpts);
SourceLocation Start =
Sources.getLocForStartOfFile(ID).getLocWithOffset(Offset);
SourceLocation End = Sources.getLocForEndOfFile(ID);
if (Length != -1)
End = Start.getLocWithOffset(Length);
std::vector<CharSourceRange> Ranges(
1, CharSourceRange::getCharRange(Start, End));
FormatStyle FStyle = Style == "LLVM" ? getLLVMStyle() : getGoogleStyle();
tooling::Replacements Replaces = reformat(FStyle, Lex, Sources, Ranges);
Rewriter Rewrite(Sources, LangOptions());
tooling::applyAllReplacements(Replaces, Rewrite);
Rewrite.getEditBuffer(ID).write(outs());
}
} // namespace format
} // namespace clang
int main(int argc, const char **argv) {
cl::ParseCommandLineOptions(argc, argv);
clang::format::format();
return 0;
}
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