llvm/lib/Object/ArchiveWriter.cpp - toolchain/llvm-project - Gitiles

 //===- ArchiveWriter.cpp - ar File Format implementation --------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines the writeArchive function.
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/Object/ArchiveWriter.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Object/SymbolicFile.h"
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/ToolOutputFile.h"
 #include "llvm/Support/raw_ostream.h"

 #if !defined(_MSC_VER) && !defined(__MINGW32__)
 #include <unistd.h>
 #else
 #include <io.h>
 #endif

 using namespace llvm;

 NewArchiveIterator::NewArchiveIterator() {}

 NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
                                        StringRef Name)
     : IsNewMember(false), Name(Name), OldI(I) {}

 NewArchiveIterator::NewArchiveIterator(StringRef NewFilename, StringRef Name)
     : IsNewMember(true), Name(Name), NewFilename(NewFilename) {}

 StringRef NewArchiveIterator::getName() const { return Name; }

 bool NewArchiveIterator::isNewMember() const { return IsNewMember; }

 object::Archive::child_iterator NewArchiveIterator::getOld() const {
   assert(!IsNewMember);
   return OldI;
 }

 StringRef NewArchiveIterator::getNew() const {
   assert(IsNewMember);
   return NewFilename;
 }

 llvm::ErrorOr<int>
 NewArchiveIterator::getFD(sys::fs::file_status &NewStatus) const {
   assert(IsNewMember);
   int NewFD;
   if (auto EC = sys::fs::openFileForRead(NewFilename, NewFD))
     return EC;
   assert(NewFD != -1);

   if (auto EC = sys::fs::status(NewFD, NewStatus))
     return EC;

   // Opening a directory doesn't make sense. Let it fail.
   // Linux cannot open directories with open(2), although
   // cygwin and *bsd can.
   if (NewStatus.type() == sys::fs::file_type::directory_file)
     return make_error_code(errc::is_a_directory);

   return NewFD;
 }

 template <typename T>
 static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
 				  bool MayTruncate = false) {
   uint64_t OldPos = OS.tell();
   OS << Data;
   unsigned SizeSoFar = OS.tell() - OldPos;
   if (Size > SizeSoFar) {
     unsigned Remaining = Size - SizeSoFar;
     for (unsigned I = 0; I < Remaining; ++I)
       OS << ' ';
   } else if (Size < SizeSoFar) {
     assert(MayTruncate && "Data doesn't fit in Size");
     // Some of the data this is used for (like UID) can be larger than the
     // space available in the archive format. Truncate in that case.
     OS.seek(OldPos + Size);
   }
 }

 static void print32BE(raw_fd_ostream &Out, unsigned Val) {
   // FIXME: Should use Endian.h here.
   for (int I = 3; I >= 0; --I) {
     char V = (Val >> (8 * I)) & 0xff;
     Out << V;
   }
 }

 static void printRestOfMemberHeader(raw_fd_ostream &Out,
                                     const sys::TimeValue &ModTime, unsigned UID,
                                     unsigned GID, unsigned Perms,
                                     unsigned Size) {
   printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
   printWithSpacePadding(Out, UID, 6, true);
   printWithSpacePadding(Out, GID, 6, true);
   printWithSpacePadding(Out, format("%o", Perms), 8);
   printWithSpacePadding(Out, Size, 10);
   Out << "`\n";
 }

 static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
                               const sys::TimeValue &ModTime, unsigned UID,
                               unsigned GID, unsigned Perms, unsigned Size) {
   printWithSpacePadding(Out, Twine(Name) + "/", 16);
   printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
 }

 static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
                               const sys::TimeValue &ModTime, unsigned UID,
                               unsigned GID, unsigned Perms, unsigned Size) {
   Out << '/';
   printWithSpacePadding(Out, NameOffset, 15);
   printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
 }

 static void writeStringTable(raw_fd_ostream &Out,
                              ArrayRef<NewArchiveIterator> Members,
                              std::vector<unsigned> &StringMapIndexes) {
   unsigned StartOffset = 0;
   for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
                                               E = Members.end();
        I != E; ++I) {
     StringRef Name = I->getName();
     if (Name.size() < 16)
       continue;
     if (StartOffset == 0) {
       printWithSpacePadding(Out, "//", 58);
       Out << "`\n";
       StartOffset = Out.tell();
     }
     StringMapIndexes.push_back(Out.tell() - StartOffset);
     Out << Name << "/\n";
   }
   if (StartOffset == 0)
     return;
   if (Out.tell() % 2)
     Out << '\n';
   int Pos = Out.tell();
   Out.seek(StartOffset - 12);
   printWithSpacePadding(Out, Pos - StartOffset, 10);
   Out.seek(Pos);
 }

 // Returns the offset of the first reference to a member offset.
 static ErrorOr<unsigned>
 writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
                  ArrayRef<MemoryBufferRef> Buffers,
                  std::vector<unsigned> &MemberOffsetRefs) {
   unsigned StartOffset = 0;
   unsigned MemberNum = 0;
   std::string NameBuf;
   raw_string_ostream NameOS(NameBuf);
   unsigned NumSyms = 0;
   LLVMContext Context;
   for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
                                               E = Members.end();
        I != E; ++I, ++MemberNum) {
     MemoryBufferRef MemberBuffer = Buffers[MemberNum];
     ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
         object::SymbolicFile::createSymbolicFile(
             MemberBuffer, sys::fs::file_magic::unknown, &Context);
     if (!ObjOrErr)
       continue;  // FIXME: check only for "not an object file" errors.
     object::SymbolicFile &Obj = *ObjOrErr.get();

     if (!StartOffset) {
       printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
       StartOffset = Out.tell();
       print32BE(Out, 0);
     }

     for (const object::BasicSymbolRef &S : Obj.symbols()) {
       uint32_t Symflags = S.getFlags();
       if (Symflags & object::SymbolRef::SF_FormatSpecific)
         continue;
       if (!(Symflags & object::SymbolRef::SF_Global))
         continue;
       if (Symflags & object::SymbolRef::SF_Undefined)
         continue;
       if (auto EC = S.printName(NameOS))
         return EC;
       NameOS << '\0';
       ++NumSyms;
       MemberOffsetRefs.push_back(MemberNum);
       print32BE(Out, 0);
     }
   }
   Out << NameOS.str();

   if (StartOffset == 0)
     return 0;

   if (Out.tell() % 2)
     Out << '\0';

   unsigned Pos = Out.tell();
   Out.seek(StartOffset - 12);
   printWithSpacePadding(Out, Pos - StartOffset, 10);
   Out.seek(StartOffset);
   print32BE(Out, NumSyms);
   Out.seek(Pos);
   return StartOffset + 4;
 }

 std::pair<StringRef, std::error_code>
 llvm::writeArchive(StringRef ArcName,
                    std::vector<NewArchiveIterator> &NewMembers,
                    bool WriteSymtab) {
   SmallString<128> TmpArchive;
   int TmpArchiveFD;
   if (auto EC = sys::fs::createUniqueFile(ArcName + ".temp-archive-%%%%%%%.a",
                                           TmpArchiveFD, TmpArchive))
     return std::make_pair(ArcName, EC);

   tool_output_file Output(TmpArchive, TmpArchiveFD);
   raw_fd_ostream &Out = Output.os();
   Out << "!<arch>\n";

   std::vector<unsigned> MemberOffsetRefs;

   std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
   std::vector<MemoryBufferRef> Members;
   std::vector<sys::fs::file_status> NewMemberStatus;

   for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
     NewArchiveIterator &Member = NewMembers[I];
     MemoryBufferRef MemberRef;

     if (Member.isNewMember()) {
       StringRef Filename = Member.getNew();
       NewMemberStatus.resize(NewMemberStatus.size() + 1);
       sys::fs::file_status &Status = NewMemberStatus.back();
       ErrorOr<int> FD = Member.getFD(Status);
       if (auto EC = FD.getError())
         return std::make_pair(Filename, EC);
       ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
           MemoryBuffer::getOpenFile(FD.get(), Filename, Status.getSize(),
                                     false);
       if (auto EC = MemberBufferOrErr.getError())
         return std::make_pair(Filename, EC);
       if (close(FD.get()) != 0)
         return std::make_pair(Filename,
                               std::error_code(errno, std::generic_category()));
       Buffers.push_back(std::move(MemberBufferOrErr.get()));
       MemberRef = Buffers.back()->getMemBufferRef();
     } else {
       object::Archive::child_iterator OldMember = Member.getOld();
       ErrorOr<MemoryBufferRef> MemberBufferOrErr =
           OldMember->getMemoryBufferRef();
       if (auto EC = MemberBufferOrErr.getError())
         return std::make_pair("", EC);
       MemberRef = MemberBufferOrErr.get();
     }
     Members.push_back(MemberRef);
   }

   unsigned MemberReferenceOffset = 0;
   if (WriteSymtab) {
     ErrorOr<unsigned> MemberReferenceOffsetOrErr =
         writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
     if (auto EC = MemberReferenceOffsetOrErr.getError())
       return std::make_pair(ArcName, EC);
     MemberReferenceOffset = MemberReferenceOffsetOrErr.get();
   }

   std::vector<unsigned> StringMapIndexes;
   writeStringTable(Out, NewMembers, StringMapIndexes);

   unsigned MemberNum = 0;
   unsigned LongNameMemberNum = 0;
   unsigned NewMemberNum = 0;
   std::vector<unsigned> MemberOffset;
   for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
                                                  E = NewMembers.end();
        I != E; ++I, ++MemberNum) {

     unsigned Pos = Out.tell();
     MemberOffset.push_back(Pos);

     MemoryBufferRef File = Members[MemberNum];
     if (I->isNewMember()) {
       StringRef FileName = I->getNew();
       const sys::fs::file_status &Status = NewMemberStatus[NewMemberNum];
       NewMemberNum++;

       StringRef Name = sys::path::filename(FileName);
       if (Name.size() < 16)
         printMemberHeader(Out, Name, Status.getLastModificationTime(),
                           Status.getUser(), Status.getGroup(),
                           Status.permissions(), Status.getSize());
       else
         printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
                           Status.getLastModificationTime(), Status.getUser(),
                           Status.getGroup(), Status.permissions(),
                           Status.getSize());
     } else {
       object::Archive::child_iterator OldMember = I->getOld();
       StringRef Name = I->getName();

       if (Name.size() < 16)
         printMemberHeader(Out, Name, OldMember->getLastModified(),
                           OldMember->getUID(), OldMember->getGID(),
                           OldMember->getAccessMode(), OldMember->getSize());
       else
         printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
                           OldMember->getLastModified(), OldMember->getUID(),
                           OldMember->getGID(), OldMember->getAccessMode(),
                           OldMember->getSize());
     }

     Out << File.getBuffer();

     if (Out.tell() % 2)
       Out << '\n';
   }

   if (MemberReferenceOffset) {
     Out.seek(MemberReferenceOffset);
     for (unsigned MemberNum : MemberOffsetRefs)
       print32BE(Out, MemberOffset[MemberNum]);
   }

   Output.keep();
   Out.close();
   sys::fs::rename(TmpArchive, ArcName);
   return std::make_pair("", std::error_code());
 }
	//===- ArchiveWriter.cpp - ar File Format implementation --------- C++ --===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// This file defines the writeArchive function.
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/Object/ArchiveWriter.h"
	#include "llvm/ADT/ArrayRef.h"
	#include "llvm/ADT/StringRef.h"
	#include "llvm/IR/LLVMContext.h"
	#include "llvm/Object/Archive.h"
	#include "llvm/Object/ObjectFile.h"
	#include "llvm/Object/SymbolicFile.h"
	#include "llvm/Support/Errc.h"
	#include "llvm/Support/ErrorHandling.h"
	#include "llvm/Support/Format.h"
	#include "llvm/Support/Path.h"
	#include "llvm/Support/ToolOutputFile.h"
	#include "llvm/Support/raw_ostream.h"

	#if !defined(_MSC_VER) && !defined(__MINGW32__)
	#include <unistd.h>
	#else
	#include <io.h>
	#endif

	using namespace llvm;

	NewArchiveIterator::NewArchiveIterator() {}

	NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
	StringRef Name)
	: IsNewMember(false), Name(Name), OldI(I) {}

	NewArchiveIterator::NewArchiveIterator(StringRef NewFilename, StringRef Name)
	: IsNewMember(true), Name(Name), NewFilename(NewFilename) {}

	StringRef NewArchiveIterator::getName() const { return Name; }

	bool NewArchiveIterator::isNewMember() const { return IsNewMember; }

	object::Archive::child_iterator NewArchiveIterator::getOld() const {
	assert(!IsNewMember);
	return OldI;
	}

	StringRef NewArchiveIterator::getNew() const {
	assert(IsNewMember);
	return NewFilename;
	}

	llvm::ErrorOr<int>
	NewArchiveIterator::getFD(sys::fs::file_status &NewStatus) const {
	assert(IsNewMember);
	int NewFD;
	if (auto EC = sys::fs::openFileForRead(NewFilename, NewFD))
	return EC;
	assert(NewFD != -1);

	if (auto EC = sys::fs::status(NewFD, NewStatus))
	return EC;

	// Opening a directory doesn't make sense. Let it fail.
	// Linux cannot open directories with open(2), although
	// cygwin and *bsd can.
	if (NewStatus.type() == sys::fs::file_type::directory_file)
	return make_error_code(errc::is_a_directory);

	return NewFD;
	}

	template <typename T>
	static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
	bool MayTruncate = false) {
	uint64_t OldPos = OS.tell();
	OS << Data;
	unsigned SizeSoFar = OS.tell() - OldPos;
	if (Size > SizeSoFar) {
	unsigned Remaining = Size - SizeSoFar;
	for (unsigned I = 0; I < Remaining; ++I)
	OS << ' ';
	} else if (Size < SizeSoFar) {
	assert(MayTruncate && "Data doesn't fit in Size");
	// Some of the data this is used for (like UID) can be larger than the
	// space available in the archive format. Truncate in that case.
	OS.seek(OldPos + Size);
	}
	}

	static void print32BE(raw_fd_ostream &Out, unsigned Val) {
	// FIXME: Should use Endian.h here.
	for (int I = 3; I >= 0; --I) {
	char V = (Val >> (8 * I)) & 0xff;
	Out << V;
	}
	}

	static void printRestOfMemberHeader(raw_fd_ostream &Out,
	const sys::TimeValue &ModTime, unsigned UID,
	unsigned GID, unsigned Perms,
	unsigned Size) {
	printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
	printWithSpacePadding(Out, UID, 6, true);
	printWithSpacePadding(Out, GID, 6, true);
	printWithSpacePadding(Out, format("%o", Perms), 8);
	printWithSpacePadding(Out, Size, 10);
	Out << "`\n";
	}

	static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
	const sys::TimeValue &ModTime, unsigned UID,
	unsigned GID, unsigned Perms, unsigned Size) {
	printWithSpacePadding(Out, Twine(Name) + "/", 16);
	printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
	}

	static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
	const sys::TimeValue &ModTime, unsigned UID,
	unsigned GID, unsigned Perms, unsigned Size) {
	Out << '/';
	printWithSpacePadding(Out, NameOffset, 15);
	printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
	}

	static void writeStringTable(raw_fd_ostream &Out,
	ArrayRef<NewArchiveIterator> Members,
	std::vector<unsigned> &StringMapIndexes) {
	unsigned StartOffset = 0;
	for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
	E = Members.end();
	I != E; ++I) {
	StringRef Name = I->getName();
	if (Name.size() < 16)
	continue;
	if (StartOffset == 0) {
	printWithSpacePadding(Out, "//", 58);
	Out << "`\n";
	StartOffset = Out.tell();
	}
	StringMapIndexes.push_back(Out.tell() - StartOffset);
	Out << Name << "/\n";
	}
	if (StartOffset == 0)
	return;
	if (Out.tell() % 2)
	Out << '\n';
	int Pos = Out.tell();
	Out.seek(StartOffset - 12);
	printWithSpacePadding(Out, Pos - StartOffset, 10);
	Out.seek(Pos);
	}

	// Returns the offset of the first reference to a member offset.
	static ErrorOr<unsigned>
	writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
	ArrayRef<MemoryBufferRef> Buffers,
	std::vector<unsigned> &MemberOffsetRefs) {
	unsigned StartOffset = 0;
	unsigned MemberNum = 0;
	std::string NameBuf;
	raw_string_ostream NameOS(NameBuf);
	unsigned NumSyms = 0;
	LLVMContext Context;
	for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
	E = Members.end();
	I != E; ++I, ++MemberNum) {
	MemoryBufferRef MemberBuffer = Buffers[MemberNum];
	ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
	object::SymbolicFile::createSymbolicFile(
	MemberBuffer, sys::fs::file_magic::unknown, &Context);
	if (!ObjOrErr)
	continue; // FIXME: check only for "not an object file" errors.
	object::SymbolicFile &Obj = *ObjOrErr.get();

	if (!StartOffset) {
	printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
	StartOffset = Out.tell();
	print32BE(Out, 0);
	}

	for (const object::BasicSymbolRef &S : Obj.symbols()) {
	uint32_t Symflags = S.getFlags();
	if (Symflags & object::SymbolRef::SF_FormatSpecific)
	continue;
	if (!(Symflags & object::SymbolRef::SF_Global))
	continue;
	if (Symflags & object::SymbolRef::SF_Undefined)
	continue;
	if (auto EC = S.printName(NameOS))
	return EC;
	NameOS << '\0';
	++NumSyms;
	MemberOffsetRefs.push_back(MemberNum);
	print32BE(Out, 0);
	}
	}
	Out << NameOS.str();

	if (StartOffset == 0)
	return 0;

	if (Out.tell() % 2)
	Out << '\0';

	unsigned Pos = Out.tell();
	Out.seek(StartOffset - 12);
	printWithSpacePadding(Out, Pos - StartOffset, 10);
	Out.seek(StartOffset);
	print32BE(Out, NumSyms);
	Out.seek(Pos);
	return StartOffset + 4;
	}

	std::pair<StringRef, std::error_code>
	llvm::writeArchive(StringRef ArcName,
	std::vector<NewArchiveIterator> &NewMembers,
	bool WriteSymtab) {
	SmallString<128> TmpArchive;
	int TmpArchiveFD;
	if (auto EC = sys::fs::createUniqueFile(ArcName + ".temp-archive-%%%%%%%.a",
	TmpArchiveFD, TmpArchive))
	return std::make_pair(ArcName, EC);

	tool_output_file Output(TmpArchive, TmpArchiveFD);
	raw_fd_ostream &Out = Output.os();
	Out << "!<arch>\n";

	std::vector<unsigned> MemberOffsetRefs;

	std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
	std::vector<MemoryBufferRef> Members;
	std::vector<sys::fs::file_status> NewMemberStatus;

	for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
	NewArchiveIterator &Member = NewMembers[I];
	MemoryBufferRef MemberRef;

	if (Member.isNewMember()) {
	StringRef Filename = Member.getNew();
	NewMemberStatus.resize(NewMemberStatus.size() + 1);
	sys::fs::file_status &Status = NewMemberStatus.back();
	ErrorOr<int> FD = Member.getFD(Status);
	if (auto EC = FD.getError())
	return std::make_pair(Filename, EC);
	ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
	MemoryBuffer::getOpenFile(FD.get(), Filename, Status.getSize(),
	false);
	if (auto EC = MemberBufferOrErr.getError())
	return std::make_pair(Filename, EC);
	if (close(FD.get()) != 0)
	return std::make_pair(Filename,
	std::error_code(errno, std::generic_category()));
	Buffers.push_back(std::move(MemberBufferOrErr.get()));
	MemberRef = Buffers.back()->getMemBufferRef();
	} else {
	object::Archive::child_iterator OldMember = Member.getOld();
	ErrorOr<MemoryBufferRef> MemberBufferOrErr =
	OldMember->getMemoryBufferRef();
	if (auto EC = MemberBufferOrErr.getError())
	return std::make_pair("", EC);
	MemberRef = MemberBufferOrErr.get();
	}
	Members.push_back(MemberRef);
	}

	unsigned MemberReferenceOffset = 0;
	if (WriteSymtab) {
	ErrorOr<unsigned> MemberReferenceOffsetOrErr =
	writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
	if (auto EC = MemberReferenceOffsetOrErr.getError())
	return std::make_pair(ArcName, EC);
	MemberReferenceOffset = MemberReferenceOffsetOrErr.get();
	}

	std::vector<unsigned> StringMapIndexes;
	writeStringTable(Out, NewMembers, StringMapIndexes);

	unsigned MemberNum = 0;
	unsigned LongNameMemberNum = 0;
	unsigned NewMemberNum = 0;
	std::vector<unsigned> MemberOffset;
	for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
	E = NewMembers.end();
	I != E; ++I, ++MemberNum) {

	unsigned Pos = Out.tell();
	MemberOffset.push_back(Pos);

	MemoryBufferRef File = Members[MemberNum];
	if (I->isNewMember()) {
	StringRef FileName = I->getNew();
	const sys::fs::file_status &Status = NewMemberStatus[NewMemberNum];
	NewMemberNum++;

	StringRef Name = sys::path::filename(FileName);
	if (Name.size() < 16)
	printMemberHeader(Out, Name, Status.getLastModificationTime(),
	Status.getUser(), Status.getGroup(),
	Status.permissions(), Status.getSize());
	else
	printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
	Status.getLastModificationTime(), Status.getUser(),
	Status.getGroup(), Status.permissions(),
	Status.getSize());
	} else {
	object::Archive::child_iterator OldMember = I->getOld();
	StringRef Name = I->getName();

	if (Name.size() < 16)
	printMemberHeader(Out, Name, OldMember->getLastModified(),
	OldMember->getUID(), OldMember->getGID(),
	OldMember->getAccessMode(), OldMember->getSize());
	else
	printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
	OldMember->getLastModified(), OldMember->getUID(),
	OldMember->getGID(), OldMember->getAccessMode(),
	OldMember->getSize());
	}

	Out << File.getBuffer();

	if (Out.tell() % 2)
	Out << '\n';
	}

	if (MemberReferenceOffset) {
	Out.seek(MemberReferenceOffset);
	for (unsigned MemberNum : MemberOffsetRefs)
	print32BE(Out, MemberOffset[MemberNum]);
	}

	Output.keep();
	Out.close();
	sys::fs::rename(TmpArchive, ArcName);
	return std::make_pair("", std::error_code());
	}