svn commit: r301992 - head/contrib/llvm/tools/clang/tools/clang-format
Bryan Drewery
bdrewery at FreeBSD.org
Fri Jun 17 16:44:32 UTC 2016
Author: bdrewery
Date: Fri Jun 17 16:44:31 2016
New Revision: 301992
URL: https://svnweb.freebsd.org/changeset/base/301992
Log:
Import ClangFormat.cpp from ^/vendor/clang/clang-release_380-r262564
Discussed with: dim
Approved by: re (gjb)
Added:
head/contrib/llvm/tools/clang/tools/clang-format/
head/contrib/llvm/tools/clang/tools/clang-format/ClangFormat.cpp
- copied unchanged from r301991, vendor/clang/clang-release_380-r262564/tools/clang-format/ClangFormat.cpp
Copied: head/contrib/llvm/tools/clang/tools/clang-format/ClangFormat.cpp (from r301991, vendor/clang/clang-release_380-r262564/tools/clang-format/ClangFormat.cpp)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/contrib/llvm/tools/clang/tools/clang-format/ClangFormat.cpp Fri Jun 17 16:44:31 2016 (r301992, copy of r301991, vendor/clang/clang-release_380-r262564/tools/clang-format/ClangFormat.cpp)
@@ -0,0 +1,364 @@
+//===-- 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/Basic/Version.h"
+#include "clang/Format/Format.h"
+#include "clang/Rewrite/Core/Rewriter.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Signals.h"
+
+using namespace llvm;
+using clang::tooling::Replacements;
+
+static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden);
+
+// Mark all our options with this category, everything else (except for -version
+// and -help) will be hidden.
+static cl::OptionCategory ClangFormatCategory("Clang-format options");
+
+static cl::list<unsigned>
+ Offsets("offset",
+ cl::desc("Format a range starting at this byte offset.\n"
+ "Multiple ranges can be formatted by specifying\n"
+ "several -offset and -length pairs.\n"
+ "Can only be used with one input file."),
+ cl::cat(ClangFormatCategory));
+static cl::list<unsigned>
+ Lengths("length",
+ cl::desc("Format a range of this length (in bytes).\n"
+ "Multiple ranges can be formatted by specifying\n"
+ "several -offset and -length pairs.\n"
+ "When only a single -offset is specified without\n"
+ "-length, clang-format will format up to the end\n"
+ "of the file.\n"
+ "Can only be used with one input file."),
+ cl::cat(ClangFormatCategory));
+static cl::list<std::string>
+LineRanges("lines", cl::desc("<start line>:<end line> - format a range of\n"
+ "lines (both 1-based).\n"
+ "Multiple ranges can be formatted by specifying\n"
+ "several -lines arguments.\n"
+ "Can't be used with -offset and -length.\n"
+ "Can only be used with one input file."),
+ cl::cat(ClangFormatCategory));
+static cl::opt<std::string>
+ Style("style",
+ cl::desc(clang::format::StyleOptionHelpDescription),
+ cl::init("file"), cl::cat(ClangFormatCategory));
+static cl::opt<std::string>
+FallbackStyle("fallback-style",
+ cl::desc("The name of the predefined style used as a\n"
+ "fallback in case clang-format is invoked with\n"
+ "-style=file, but can not find the .clang-format\n"
+ "file to use.\n"
+ "Use -fallback-style=none to skip formatting."),
+ cl::init("LLVM"), cl::cat(ClangFormatCategory));
+
+static cl::opt<std::string>
+AssumeFileName("assume-filename",
+ cl::desc("When reading from stdin, clang-format assumes this\n"
+ "filename to look for a style config file (with\n"
+ "-style=file) and to determine the language."),
+ cl::init("<stdin>"), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> Inplace("i",
+ cl::desc("Inplace edit <file>s, if specified."),
+ cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> OutputXML("output-replacements-xml",
+ cl::desc("Output replacements as XML."),
+ cl::cat(ClangFormatCategory));
+static cl::opt<bool>
+ DumpConfig("dump-config",
+ cl::desc("Dump configuration options to stdout and exit.\n"
+ "Can be used with -style option."),
+ cl::cat(ClangFormatCategory));
+static cl::opt<unsigned>
+ Cursor("cursor",
+ cl::desc("The position of the cursor when invoking\n"
+ "clang-format from an editor integration"),
+ cl::init(0), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> SortIncludes(
+ "sort-includes",
+ cl::desc("If set, overrides the include sorting behavior determined by the "
+ "SortIncludes style flag"),
+ cl::cat(ClangFormatCategory));
+
+static cl::list<std::string> FileNames(cl::Positional, cl::desc("[<file> ...]"),
+ cl::cat(ClangFormatCategory));
+
+namespace clang {
+namespace format {
+
+static FileID createInMemoryFile(StringRef FileName, MemoryBuffer *Source,
+ SourceManager &Sources, FileManager &Files,
+ vfs::InMemoryFileSystem *MemFS) {
+ MemFS->addFileNoOwn(FileName, 0, Source);
+ return Sources.createFileID(Files.getFile(FileName), SourceLocation(),
+ SrcMgr::C_User);
+}
+
+// Parses <start line>:<end line> input to a pair of line numbers.
+// Returns true on error.
+static bool parseLineRange(StringRef Input, unsigned &FromLine,
+ unsigned &ToLine) {
+ std::pair<StringRef, StringRef> LineRange = Input.split(':');
+ return LineRange.first.getAsInteger(0, FromLine) ||
+ LineRange.second.getAsInteger(0, ToLine);
+}
+
+static bool fillRanges(MemoryBuffer *Code,
+ std::vector<tooling::Range> &Ranges) {
+ IntrusiveRefCntPtr<vfs::InMemoryFileSystem> InMemoryFileSystem(
+ new vfs::InMemoryFileSystem);
+ FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+ DiagnosticsEngine Diagnostics(
+ IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
+ new DiagnosticOptions);
+ SourceManager Sources(Diagnostics, Files);
+ FileID ID = createInMemoryFile("<irrelevant>", Code, Sources, Files,
+ InMemoryFileSystem.get());
+ if (!LineRanges.empty()) {
+ if (!Offsets.empty() || !Lengths.empty()) {
+ errs() << "error: cannot use -lines with -offset/-length\n";
+ return true;
+ }
+
+ for (unsigned i = 0, e = LineRanges.size(); i < e; ++i) {
+ unsigned FromLine, ToLine;
+ if (parseLineRange(LineRanges[i], FromLine, ToLine)) {
+ errs() << "error: invalid <start line>:<end line> pair\n";
+ return true;
+ }
+ if (FromLine > ToLine) {
+ errs() << "error: start line should be less than end line\n";
+ return true;
+ }
+ SourceLocation Start = Sources.translateLineCol(ID, FromLine, 1);
+ SourceLocation End = Sources.translateLineCol(ID, ToLine, UINT_MAX);
+ if (Start.isInvalid() || End.isInvalid())
+ return true;
+ unsigned Offset = Sources.getFileOffset(Start);
+ unsigned Length = Sources.getFileOffset(End) - Offset;
+ Ranges.push_back(tooling::Range(Offset, Length));
+ }
+ return false;
+ }
+
+ if (Offsets.empty())
+ Offsets.push_back(0);
+ if (Offsets.size() != Lengths.size() &&
+ !(Offsets.size() == 1 && Lengths.empty())) {
+ errs() << "error: number of -offset and -length arguments must match.\n";
+ return true;
+ }
+ for (unsigned i = 0, e = Offsets.size(); i != e; ++i) {
+ if (Offsets[i] >= Code->getBufferSize()) {
+ 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()) {
+ 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);
+ }
+ unsigned Offset = Sources.getFileOffset(Start);
+ unsigned Length = Sources.getFileOffset(End) - Offset;
+ Ranges.push_back(tooling::Range(Offset, Length));
+ }
+ return false;
+}
+
+static void outputReplacementXML(StringRef Text) {
+ // FIXME: When we sort includes, we need to make sure the stream is correct
+ // utf-8.
+ size_t From = 0;
+ size_t Index;
+ while ((Index = Text.find_first_of("\n\r<&", From)) != StringRef::npos) {
+ outs() << Text.substr(From, Index - From);
+ switch (Text[Index]) {
+ case '\n':
+ outs() << "
";
+ break;
+ case '\r':
+ outs() << "
";
+ break;
+ case '<':
+ outs() << "<";
+ break;
+ case '&':
+ outs() << "&";
+ break;
+ default:
+ llvm_unreachable("Unexpected character encountered!");
+ }
+ From = Index + 1;
+ }
+ outs() << Text.substr(From);
+}
+
+static void outputReplacementsXML(const Replacements &Replaces) {
+ for (const auto &R : Replaces) {
+ outs() << "<replacement "
+ << "offset='" << R.getOffset() << "' "
+ << "length='" << R.getLength() << "'>";
+ outputReplacementXML(R.getReplacementText());
+ outs() << "</replacement>\n";
+ }
+}
+
+// Returns true on error.
+static bool format(StringRef FileName) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
+ MemoryBuffer::getFileOrSTDIN(FileName);
+ if (std::error_code EC = CodeOrErr.getError()) {
+ errs() << EC.message() << "\n";
+ return true;
+ }
+ std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
+ if (Code->getBufferSize() == 0)
+ return false; // Empty files are formatted correctly.
+ std::vector<tooling::Range> Ranges;
+ if (fillRanges(Code.get(), Ranges))
+ return true;
+ StringRef AssumedFileName = (FileName == "-") ? AssumeFileName : FileName;
+ FormatStyle FormatStyle = getStyle(Style, AssumedFileName, FallbackStyle);
+ if (SortIncludes.getNumOccurrences() != 0)
+ FormatStyle.SortIncludes = SortIncludes;
+ unsigned CursorPosition = Cursor;
+ Replacements Replaces = sortIncludes(FormatStyle, Code->getBuffer(), Ranges,
+ AssumedFileName, &CursorPosition);
+ std::string ChangedCode =
+ tooling::applyAllReplacements(Code->getBuffer(), Replaces);
+ for (const auto &R : Replaces)
+ Ranges.push_back({R.getOffset(), R.getLength()});
+
+ bool IncompleteFormat = false;
+ Replacements FormatChanges = reformat(FormatStyle, ChangedCode, Ranges,
+ AssumedFileName, &IncompleteFormat);
+ Replaces = tooling::mergeReplacements(Replaces, FormatChanges);
+ if (OutputXML) {
+ outs() << "<?xml version='1.0'?>\n<replacements "
+ "xml:space='preserve' incomplete_format='"
+ << (IncompleteFormat ? "true" : "false") << "'>\n";
+ if (Cursor.getNumOccurrences() != 0)
+ outs() << "<cursor>"
+ << tooling::shiftedCodePosition(FormatChanges, CursorPosition)
+ << "</cursor>\n";
+
+ outputReplacementsXML(Replaces);
+ outs() << "</replacements>\n";
+ } else {
+ IntrusiveRefCntPtr<vfs::InMemoryFileSystem> InMemoryFileSystem(
+ new vfs::InMemoryFileSystem);
+ FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+ DiagnosticsEngine Diagnostics(
+ IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
+ new DiagnosticOptions);
+ SourceManager Sources(Diagnostics, Files);
+ FileID ID = createInMemoryFile(AssumedFileName, Code.get(), Sources, Files,
+ InMemoryFileSystem.get());
+ Rewriter Rewrite(Sources, LangOptions());
+ tooling::applyAllReplacements(Replaces, Rewrite);
+ if (Inplace) {
+ if (FileName == "-")
+ errs() << "error: cannot use -i when reading from stdin.\n";
+ else if (Rewrite.overwriteChangedFiles())
+ return true;
+ } else {
+ if (Cursor.getNumOccurrences() != 0)
+ outs() << "{ \"Cursor\": "
+ << tooling::shiftedCodePosition(FormatChanges, CursorPosition)
+ << ", \"IncompleteFormat\": "
+ << (IncompleteFormat ? "true" : "false") << " }\n";
+ Rewrite.getEditBuffer(ID).write(outs());
+ }
+ }
+ return false;
+}
+
+} // namespace format
+} // namespace clang
+
+static void PrintVersion() {
+ raw_ostream &OS = outs();
+ OS << clang::getClangToolFullVersion("clang-format") << '\n';
+}
+
+int main(int argc, const char **argv) {
+ llvm::sys::PrintStackTraceOnErrorSignal();
+
+ cl::HideUnrelatedOptions(ClangFormatCategory);
+
+ cl::SetVersionPrinter(PrintVersion);
+ cl::ParseCommandLineOptions(
+ argc, argv,
+ "A tool to format C/C++/Java/JavaScript/Objective-C/Protobuf 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();
+
+ if (DumpConfig) {
+ std::string Config =
+ clang::format::configurationAsText(clang::format::getStyle(
+ Style, FileNames.empty() ? AssumeFileName : FileNames[0],
+ FallbackStyle));
+ outs() << Config << "\n";
+ return 0;
+ }
+
+ 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() || !LineRanges.empty()) {
+ errs() << "error: -offset, -length and -lines 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;
+}
+
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