Rename PathV2 to just Path now that it is the only one.

llvm-svn: 185015

1 files changed, 0 insertions, 870 deletions

diff --git a/llvm/lib/Support/Unix/PathV2.inc b/llvm/lib/Support/Unix/PathV2.inc
deleted file mode 100644
index 91efcd80233..00000000000
--- a/llvm/lib/Support/Unix/PathV2.inc
+++ /dev/null
@@ -1,870 +0,0 @@
-//===- llvm/Support/Unix/PathV2.cpp - Unix Path 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 implements the Unix specific implementation of the PathV2 API.
-//
-//===----------------------------------------------------------------------===//
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic UNIX code that
-//===          is guaranteed to work on *all* UNIX variants.
-//===----------------------------------------------------------------------===//
-
-#include "Unix.h"
-#include "llvm/Support/Process.h"
-#if HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#ifdef HAVE_SYS_MMAN_H
-#include <sys/mman.h>
-#endif
-#if HAVE_DIRENT_H
-# include <dirent.h>
-# define NAMLEN(dirent) strlen((dirent)->d_name)
-#else
-# define dirent direct
-# define NAMLEN(dirent) (dirent)->d_namlen
-# if HAVE_SYS_NDIR_H
-#  include <sys/ndir.h>
-# endif
-# if HAVE_SYS_DIR_H
-#  include <sys/dir.h>
-# endif
-# if HAVE_NDIR_H
-#  include <ndir.h>
-# endif
-#endif
-#if HAVE_STDIO_H
-#include <stdio.h>
-#endif
-#if HAVE_LIMITS_H
-#include <limits.h>
-#endif
-
-#ifdef __APPLE__
-#include <mach-o/dyld.h>
-#endif
-
-// Both stdio.h and cstdio are included via different pathes and
-// stdcxx's cstdio doesn't include stdio.h, so it doesn't #undef the macros
-// either.
-#undef ferror
-#undef feof
-
-// For GNU Hurd
-#if defined(__GNU__) && !defined(PATH_MAX)
-# define PATH_MAX 4096
-#endif
-
-using namespace llvm;
-
-namespace {
-  /// This class automatically closes the given file descriptor when it goes out
-  /// of scope. You can take back explicit ownership of the file descriptor by
-  /// calling take(). The destructor does not verify that close was successful.
-  /// Therefore, never allow this class to call close on a file descriptor that
-  /// has been read from or written to.
-  struct AutoFD {
-    int FileDescriptor;
-
-    AutoFD(int fd) : FileDescriptor(fd) {}
-    ~AutoFD() {
-      if (FileDescriptor >= 0)
-        ::close(FileDescriptor);
-    }
-
-    int take() {
-      int ret = FileDescriptor;
-      FileDescriptor = -1;
-      return ret;
-    }
-
-    operator int() const {return FileDescriptor;}
-  };
-
-  error_code TempDir(SmallVectorImpl<char> &result) {
-    // FIXME: Don't use TMPDIR if program is SUID or SGID enabled.
-    const char *dir = 0;
-    (dir = std::getenv("TMPDIR" )) ||
-    (dir = std::getenv("TMP"    )) ||
-    (dir = std::getenv("TEMP"   )) ||
-    (dir = std::getenv("TEMPDIR")) ||
-#ifdef P_tmpdir
-    (dir = P_tmpdir) ||
-#endif
-    (dir = "/tmp");
-
-    result.clear();
-    StringRef d(dir);
-    result.append(d.begin(), d.end());
-    return error_code::success();
-  }
-}
-
-namespace llvm {
-namespace sys  {
-namespace fs {
-#if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
-    defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
-    defined(__linux__) || defined(__CYGWIN__)
-static int
-test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
-    const char *dir, const char *bin)
-{
-  struct stat sb;
-
-  snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
-  if (realpath(buf, ret) == NULL)
-    return (1);
-  if (stat(buf, &sb) != 0)
-    return (1);
-
-  return (0);
-}
-
-static char *
-getprogpath(char ret[PATH_MAX], const char *bin)
-{
-  char *pv, *s, *t, buf[PATH_MAX];
-
-  /* First approach: absolute path. */
-  if (bin[0] == '/') {
-    if (test_dir(buf, ret, "/", bin) == 0)
-      return (ret);
-    return (NULL);
-  }
-
-  /* Second approach: relative path. */
-  if (strchr(bin, '/') != NULL) {
-    if (getcwd(buf, PATH_MAX) == NULL)
-      return (NULL);
-    if (test_dir(buf, ret, buf, bin) == 0)
-      return (ret);
-    return (NULL);
-  }
-
-  /* Third approach: $PATH */
-  if ((pv = getenv("PATH")) == NULL)
-    return (NULL);
-  s = pv = strdup(pv);
-  if (pv == NULL)
-    return (NULL);
-  while ((t = strsep(&s, ":")) != NULL) {
-    if (test_dir(buf, ret, t, bin) == 0) {
-      free(pv);
-      return (ret);
-    }
-  }
-  free(pv);
-  return (NULL);
-}
-#endif // __FreeBSD__ || __NetBSD__ || __FreeBSD_kernel__
-
-/// GetMainExecutable - Return the path to the main executable, given the
-/// value of argv[0] from program startup.
-std::string getMainExecutable(const char *argv0, void *MainAddr) {
-#if defined(__APPLE__)
-  // On OS X the executable path is saved to the stack by dyld. Reading it
-  // from there is much faster than calling dladdr, especially for large
-  // binaries with symbols.
-  char exe_path[MAXPATHLEN];
-  uint32_t size = sizeof(exe_path);
-  if (_NSGetExecutablePath(exe_path, &size) == 0) {
-    char link_path[MAXPATHLEN];
-    if (realpath(exe_path, link_path))
-      return link_path;
-  }
-#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
-      defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__)
-  char exe_path[PATH_MAX];
-
-  if (getprogpath(exe_path, argv0) != NULL)
-    return exe_path;
-#elif defined(__linux__) || defined(__CYGWIN__)
-  char exe_path[MAXPATHLEN];
-  StringRef aPath("/proc/self/exe");
-  if (sys::fs::exists(aPath)) {
-      // /proc is not always mounted under Linux (chroot for example).
-      ssize_t len = readlink(aPath.str().c_str(), exe_path, sizeof(exe_path));
-      if (len >= 0)
-          return StringRef(exe_path, len);
-  } else {
-      // Fall back to the classical detection.
-      if (getprogpath(exe_path, argv0) != NULL)
-          return exe_path;
-  }
-#elif defined(HAVE_DLFCN_H)
-  // Use dladdr to get executable path if available.
-  Dl_info DLInfo;
-  int err = dladdr(MainAddr, &DLInfo);
-  if (err == 0)
-    return "";
-
-  // If the filename is a symlink, we need to resolve and return the location of
-  // the actual executable.
-  char link_path[MAXPATHLEN];
-  if (realpath(DLInfo.dli_fname, link_path))
-    return link_path;
-#else
-#error GetMainExecutable is not implemented on this host yet.
-#endif
-  return "";
-}
-
-TimeValue file_status::getLastModificationTime() const {
-  TimeValue Ret;
-  Ret.fromEpochTime(fs_st_mtime);
-  return Ret;
-}
-
-error_code current_path(SmallVectorImpl<char> &result) {
-#ifdef MAXPATHLEN
-  result.reserve(MAXPATHLEN);
-#else
-// For GNU Hurd
-  result.reserve(1024);
-#endif
-
-  while (true) {
-    if (::getcwd(result.data(), result.capacity()) == 0) {
-      // See if there was a real error.
-      if (errno != errc::not_enough_memory)
-        return error_code(errno, system_category());
-      // Otherwise there just wasn't enough space.
-      result.reserve(result.capacity() * 2);
-    } else
-      break;
-  }
-
-  result.set_size(strlen(result.data()));
-  return error_code::success();
-}
-
-error_code copy_file(const Twine &from, const Twine &to, copy_option copt) {
- // Get arguments.
-  SmallString<128> from_storage;
-  SmallString<128> to_storage;
-  StringRef f = from.toNullTerminatedStringRef(from_storage);
-  StringRef t = to.toNullTerminatedStringRef(to_storage);
-
-  const size_t buf_sz = 32768;
-  char buffer[buf_sz];
-  int from_file = -1, to_file = -1;
-
-  // Open from.
-  if ((from_file = ::open(f.begin(), O_RDONLY)) < 0)
-    return error_code(errno, system_category());
-  AutoFD from_fd(from_file);
-
-  // Stat from.
-  struct stat from_stat;
-  if (::stat(f.begin(), &from_stat) != 0)
-    return error_code(errno, system_category());
-
-  // Setup to flags.
-  int to_flags = O_CREAT | O_WRONLY;
-  if (copt == copy_option::fail_if_exists)
-    to_flags |= O_EXCL;
-
-  // Open to.
-  if ((to_file = ::open(t.begin(), to_flags, from_stat.st_mode)) < 0)
-    return error_code(errno, system_category());
-  AutoFD to_fd(to_file);
-
-  // Copy!
-  ssize_t sz, sz_read = 1, sz_write;
-  while (sz_read > 0 &&
-         (sz_read = ::read(from_fd, buffer, buf_sz)) > 0) {
-    // Allow for partial writes - see Advanced Unix Programming (2nd Ed.),
-    // Marc Rochkind, Addison-Wesley, 2004, page 94
-    sz_write = 0;
-    do {
-      if ((sz = ::write(to_fd, buffer + sz_write, sz_read - sz_write)) < 0) {
-        sz_read = sz;  // cause read loop termination.
-        break;         // error.
-      }
-      sz_write += sz;
-    } while (sz_write < sz_read);
-  }
-
-  // After all the file operations above the return value of close actually
-  // matters.
-  if (::close(from_fd.take()) < 0) sz_read = -1;
-  if (::close(to_fd.take()) < 0) sz_read = -1;
-
-  // Check for errors.
-  if (sz_read < 0)
-    return error_code(errno, system_category());
-
-  return error_code::success();
-}
-
-error_code create_directory(const Twine &path, bool &existed) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  if (::mkdir(p.begin(), S_IRWXU | S_IRWXG) == -1) {
-    if (errno != errc::file_exists)
-      return error_code(errno, system_category());
-    existed = true;
-  } else
-    existed = false;
-
-  return error_code::success();
-}
-
-error_code create_hard_link(const Twine &to, const Twine &from) {
-  // Get arguments.
-  SmallString<128> from_storage;
-  SmallString<128> to_storage;
-  StringRef f = from.toNullTerminatedStringRef(from_storage);
-  StringRef t = to.toNullTerminatedStringRef(to_storage);
-
-  if (::link(t.begin(), f.begin()) == -1)
-    return error_code(errno, system_category());
-
-  return error_code::success();
-}
-
-error_code create_symlink(const Twine &to, const Twine &from) {
-  // Get arguments.
-  SmallString<128> from_storage;
-  SmallString<128> to_storage;
-  StringRef f = from.toNullTerminatedStringRef(from_storage);
-  StringRef t = to.toNullTerminatedStringRef(to_storage);
-
-  if (::symlink(t.begin(), f.begin()) == -1)
-    return error_code(errno, system_category());
-
-  return error_code::success();
-}
-
-error_code remove(const Twine &path, bool &existed) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  struct stat buf;
-  if (stat(p.begin(), &buf) != 0) {
-    if (errno != errc::no_such_file_or_directory)
-      return error_code(errno, system_category());
-    existed = false;
-    return error_code::success();
-  }
-
-  // Note: this check catches strange situations. In all cases, LLVM should
-  // only be involved in the creation and deletion of regular files.  This
-  // check ensures that what we're trying to erase is a regular file. It
-  // effectively prevents LLVM from erasing things like /dev/null, any block
-  // special file, or other things that aren't "regular" files.
-  if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode))
-    return make_error_code(errc::operation_not_permitted);
-
-  if (::remove(p.begin()) == -1) {
-    if (errno != errc::no_such_file_or_directory)
-      return error_code(errno, system_category());
-    existed = false;
-  } else
-    existed = true;
-
-  return error_code::success();
-}
-
-error_code rename(const Twine &from, const Twine &to) {
-  // Get arguments.
-  SmallString<128> from_storage;
-  SmallString<128> to_storage;
-  StringRef f = from.toNullTerminatedStringRef(from_storage);
-  StringRef t = to.toNullTerminatedStringRef(to_storage);
-
-  if (::rename(f.begin(), t.begin()) == -1) {
-    // If it's a cross device link, copy then delete, otherwise return the error
-    if (errno == EXDEV) {
-      if (error_code ec = copy_file(from, to, copy_option::overwrite_if_exists))
-        return ec;
-      bool Existed;
-      if (error_code ec = remove(from, Existed))
-        return ec;
-    } else
-      return error_code(errno, system_category());
-  }
-
-  return error_code::success();
-}
-
-error_code resize_file(const Twine &path, uint64_t size) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  if (::truncate(p.begin(), size) == -1)
-    return error_code(errno, system_category());
-
-  return error_code::success();
-}
-
-error_code exists(const Twine &path, bool &result) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  if (::access(p.begin(), F_OK) == -1) {
-    if (errno != errc::no_such_file_or_directory)
-      return error_code(errno, system_category());
-    result = false;
-  } else
-    result = true;
-
-  return error_code::success();
-}
-
-bool can_write(const Twine &Path) {
-  SmallString<128> PathStorage;
-  StringRef P = Path.toNullTerminatedStringRef(PathStorage);
-  return 0 == access(P.begin(), W_OK);
-}
-
-bool can_execute(const Twine &Path) {
-  SmallString<128> PathStorage;
-  StringRef P = Path.toNullTerminatedStringRef(PathStorage);
-
-  if (0 != access(P.begin(), R_OK | X_OK))
-    return false;
-  struct stat buf;
-  if (0 != stat(P.begin(), &buf))
-    return false;
-  if (!S_ISREG(buf.st_mode))
-    return false;
-  return true;
-}
-
-bool equivalent(file_status A, file_status B) {
-  assert(status_known(A) && status_known(B));
-  return A.fs_st_dev == B.fs_st_dev &&
-         A.fs_st_ino == B.fs_st_ino;
-}
-
-error_code equivalent(const Twine &A, const Twine &B, bool &result) {
-  file_status fsA, fsB;
-  if (error_code ec = status(A, fsA)) return ec;
-  if (error_code ec = status(B, fsB)) return ec;
-  result = equivalent(fsA, fsB);
-  return error_code::success();
-}
-
-error_code file_size(const Twine &path, uint64_t &result) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  struct stat status;
-  if (::stat(p.begin(), &status) == -1)
-    return error_code(errno, system_category());
-  if (!S_ISREG(status.st_mode))
-    return make_error_code(errc::operation_not_permitted);
-
-  result = status.st_size;
-  return error_code::success();
-}
-
-error_code getUniqueID(const Twine Path, uint64_t &Result) {
-  SmallString<128> Storage;
-  StringRef P = Path.toNullTerminatedStringRef(Storage);
-
-  struct stat Status;
-  if (::stat(P.begin(), &Status) != 0)
-    return error_code(errno, system_category());
-
-  Result = Status.st_ino;
-  return error_code::success();
-}
-
-error_code status(const Twine &path, file_status &result) {
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-
-  struct stat status;
-  if (::stat(p.begin(), &status) != 0) {
-    error_code ec(errno, system_category());
-    if (ec == errc::no_such_file_or_directory)
-      result = file_status(file_type::file_not_found);
-    else
-      result = file_status(file_type::status_error);
-    return ec;
-  }
-
-  perms prms = static_cast<perms>(status.st_mode & perms_mask);
-  
-  if (S_ISDIR(status.st_mode))
-    result = file_status(file_type::directory_file, prms);
-  else if (S_ISREG(status.st_mode))
-    result = file_status(file_type::regular_file, prms);
-  else if (S_ISBLK(status.st_mode))
-    result = file_status(file_type::block_file, prms);
-  else if (S_ISCHR(status.st_mode))
-    result = file_status(file_type::character_file, prms);
-  else if (S_ISFIFO(status.st_mode))
-    result = file_status(file_type::fifo_file, prms);
-  else if (S_ISSOCK(status.st_mode))
-    result = file_status(file_type::socket_file, prms);
-  else
-    result = file_status(file_type::type_unknown, prms);
-
-  result.fs_st_dev = status.st_dev;
-  result.fs_st_ino = status.st_ino;
-  result.fs_st_mtime = status.st_mtime;
-  result.fs_st_uid = status.st_uid;
-  result.fs_st_gid = status.st_gid;
-
-  return error_code::success();
-}
-
-// Modifies permissions on a file.
-error_code permissions(const Twine &path, perms prms) {
-  if ((prms & add_perms) && (prms & remove_perms))
-    llvm_unreachable("add_perms and remove_perms are mutually exclusive");
-
-  // Get current permissions
-  // FIXME: We only need this stat for add_perms and remove_perms.
-  file_status info;
-  if (error_code ec = status(path, info)) {
-    return ec;
-  }
-  
-  // Set updated permissions.
-  SmallString<128> path_storage;
-  StringRef p = path.toNullTerminatedStringRef(path_storage);
-  perms permsToSet;
-  if (prms & add_perms) {
-    permsToSet = (info.permissions() | prms) & perms_mask;
-  } else if (prms & remove_perms) {
-    permsToSet = (info.permissions() & ~prms) & perms_mask;
-  } else {
-    permsToSet = prms & perms_mask;
-  }
-  if (::chmod(p.begin(), static_cast<mode_t>(permsToSet))) {
-    return error_code(errno, system_category()); 
-  }
-
-  return error_code::success();
-}
-
-error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
-  timeval Times[2];
-  Times[0].tv_sec = Time.toPosixTime();
-  Times[0].tv_usec = 0;
-  Times[1] = Times[0];
-  if (::futimes(FD, Times))
-    return error_code(errno, system_category());
-  return error_code::success();
-}
-
-error_code unique_file(const Twine &model, int &result_fd,
-                       SmallVectorImpl<char> &result_path,
-                       bool makeAbsolute, unsigned mode) {
-  SmallString<128> Model;
-  model.toVector(Model);
-  // Null terminate.
-  Model.c_str();
-
-  if (makeAbsolute) {
-    // Make model absolute by prepending a temp directory if it's not already.
-    bool absolute = path::is_absolute(Twine(Model));
-    if (!absolute) {
-      SmallString<128> TDir;
-      if (error_code ec = TempDir(TDir)) return ec;
-      path::append(TDir, Twine(Model));
-      Model.swap(TDir);
-    }
-  }
-
-  // From here on, DO NOT modify model. It may be needed if the randomly chosen
-  // path already exists.
-  SmallString<128> RandomPath = Model;
-
-retry_random_path:
-  // Replace '%' with random chars.
-  for (unsigned i = 0, e = Model.size(); i != e; ++i) {
-    if (Model[i] == '%')
-      RandomPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
-  }
-
-  // Make sure we don't fall into an infinite loop by constantly trying
-  // to create the parent path.
-  bool TriedToCreateParent = false;
-
-  // Try to open + create the file.
-rety_open_create:
-  int RandomFD = ::open(RandomPath.c_str(), O_RDWR | O_CREAT | O_EXCL, mode);
-  if (RandomFD == -1) {
-    int SavedErrno = errno;
-    // If the file existed, try again, otherwise, error.
-    if (SavedErrno == errc::file_exists)
-      goto retry_random_path;
-    // If path prefix doesn't exist, try to create it.
-    if (SavedErrno == errc::no_such_file_or_directory && !TriedToCreateParent) {
-      TriedToCreateParent = true;
-      StringRef p(RandomPath);
-      SmallString<64> dir_to_create;
-      for (path::const_iterator i = path::begin(p),
-                                e = --path::end(p); i != e; ++i) {
-        path::append(dir_to_create, *i);
-        bool Exists;
-        if (error_code ec = exists(Twine(dir_to_create), Exists)) return ec;
-        if (!Exists) {
-          // Don't try to create network paths.
-          if (i->size() > 2 && (*i)[0] == '/' &&
-                               (*i)[1] == '/' &&
-                               (*i)[2] != '/')
-            return make_error_code(errc::no_such_file_or_directory);
-          if (::mkdir(dir_to_create.c_str(), 0700) == -1 &&
-              errno != errc::file_exists)
-            return error_code(errno, system_category());
-        }
-      }
-      goto rety_open_create;
-    }
-
-    return error_code(SavedErrno, system_category());
-  }
-
-   // Make the path absolute.
-  char real_path_buff[PATH_MAX + 1];
-  if (realpath(RandomPath.c_str(), real_path_buff) == NULL) {
-    int error = errno;
-    ::close(RandomFD);
-    ::unlink(RandomPath.c_str());
-    return error_code(error, system_category());
-  }
-
-  result_path.clear();
-  StringRef d(real_path_buff);
-  result_path.append(d.begin(), d.end());
-
-  result_fd = RandomFD;
-  return error_code::success();
-}
-
-error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
-  AutoFD ScopedFD(FD);
-  if (!CloseFD)
-    ScopedFD.take();
-
-  // Figure out how large the file is.
-  struct stat FileInfo;
-  if (fstat(FD, &FileInfo) == -1)
-    return error_code(errno, system_category());
-  uint64_t FileSize = FileInfo.st_size;
-
-  if (Size == 0)
-    Size = FileSize;
-  else if (FileSize < Size) {
-    // We need to grow the file.
-    if (ftruncate(FD, Size) == -1)
-      return error_code(errno, system_category());
-  }
-
-  int flags = (Mode == readwrite) ? MAP_SHARED : MAP_PRIVATE;
-  int prot = (Mode == readonly) ? PROT_READ : (PROT_READ | PROT_WRITE);
-#ifdef MAP_FILE
-  flags |= MAP_FILE;
-#endif
-  Mapping = ::mmap(0, Size, prot, flags, FD, Offset);
-  if (Mapping == MAP_FAILED)
-    return error_code(errno, system_category());
-  return error_code::success();
-}
-
-mapped_file_region::mapped_file_region(const Twine &path,
-                                       mapmode mode,
-                                       uint64_t length,
-                                       uint64_t offset,
-                                       error_code &ec)
-  : Mode(mode)
-  , Size(length)
-  , Mapping() {
-  // Make sure that the requested size fits within SIZE_T.
-  if (length > std::numeric_limits<size_t>::max()) {
-    ec = make_error_code(errc::invalid_argument);
-    return;
-  }
-
-  SmallString<128> path_storage;
-  StringRef name = path.toNullTerminatedStringRef(path_storage);
-  int oflags = (mode == readonly) ? O_RDONLY : O_RDWR;
-  int ofd = ::open(name.begin(), oflags);
-  if (ofd == -1) {
-    ec = error_code(errno, system_category());
-    return;
-  }
-
-  ec = init(ofd, true, offset);
-  if (ec)
-    Mapping = 0;
-}
-
-mapped_file_region::mapped_file_region(int fd,
-                                       bool closefd,
-                                       mapmode mode,
-                                       uint64_t length,
-                                       uint64_t offset,
-                                       error_code &ec)
-  : Mode(mode)
-  , Size(length)
-  , Mapping() {
-  // Make sure that the requested size fits within SIZE_T.
-  if (length > std::numeric_limits<size_t>::max()) {
-    ec = make_error_code(errc::invalid_argument);
-    return;
-  }
-
-  ec = init(fd, closefd, offset);
-  if (ec)
-    Mapping = 0;
-}
-
-mapped_file_region::~mapped_file_region() {
-  if (Mapping)
-    ::munmap(Mapping, Size);
-}
-
-#if LLVM_HAS_RVALUE_REFERENCES
-mapped_file_region::mapped_file_region(mapped_file_region &&other)
-  : Mode(other.Mode), Size(other.Size), Mapping(other.Mapping) {
-  other.Mapping = 0;
-}
-#endif
-
-mapped_file_region::mapmode mapped_file_region::flags() const {
-  assert(Mapping && "Mapping failed but used anyway!");
-  return Mode;
-}
-
-uint64_t mapped_file_region::size() const {
-  assert(Mapping && "Mapping failed but used anyway!");
-  return Size;
-}
-
-char *mapped_file_region::data() const {
-  assert(Mapping && "Mapping failed but used anyway!");
-  assert(Mode != readonly && "Cannot get non const data for readonly mapping!");
-  return reinterpret_cast<char*>(Mapping);
-}
-
-const char *mapped_file_region::const_data() const {
-  assert(Mapping && "Mapping failed but used anyway!");
-  return reinterpret_cast<const char*>(Mapping);
-}
-
-int mapped_file_region::alignment() {
-  return process::get_self()->page_size();
-}
-
-error_code detail::directory_iterator_construct(detail::DirIterState &it,
-                                                StringRef path){
-  SmallString<128> path_null(path);
-  DIR *directory = ::opendir(path_null.c_str());
-  if (directory == 0)
-    return error_code(errno, system_category());
-
-  it.IterationHandle = reinterpret_cast<intptr_t>(directory);
-  // Add something for replace_filename to replace.
-  path::append(path_null, ".");
-  it.CurrentEntry = directory_entry(path_null.str());
-  return directory_iterator_increment(it);
-}
-
-error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
-  if (it.IterationHandle)
-    ::closedir(reinterpret_cast<DIR *>(it.IterationHandle));
-  it.IterationHandle = 0;
-  it.CurrentEntry = directory_entry();
-  return error_code::success();
-}
-
-error_code detail::directory_iterator_increment(detail::DirIterState &it) {
-  errno = 0;
-  dirent *cur_dir = ::readdir(reinterpret_cast<DIR *>(it.IterationHandle));
-  if (cur_dir == 0 && errno != 0) {
-    return error_code(errno, system_category());
-  } else if (cur_dir != 0) {
-    StringRef name(cur_dir->d_name, NAMLEN(cur_dir));
-    if ((name.size() == 1 && name[0] == '.') ||
-        (name.size() == 2 && name[0] == '.' && name[1] == '.'))
-      return directory_iterator_increment(it);
-    it.CurrentEntry.replace_filename(name);
-  } else
-    return directory_iterator_destruct(it);
-
-  return error_code::success();
-}
-
-error_code get_magic(const Twine &path, uint32_t len,
-                     SmallVectorImpl<char> &result) {
-  SmallString<128> PathStorage;
-  StringRef Path = path.toNullTerminatedStringRef(PathStorage);
-  result.set_size(0);
-
-  // Open path.
-  std::FILE *file = std::fopen(Path.data(), "rb");
-  if (file == 0)
-    return error_code(errno, system_category());
-
-  // Reserve storage.
-  result.reserve(len);
-
-  // Read magic!
-  size_t size = std::fread(result.data(), 1, len, file);
-  if (std::ferror(file) != 0) {
-    std::fclose(file);
-    return error_code(errno, system_category());
-  } else if (size != len) {
-    if (std::feof(file) != 0) {
-      std::fclose(file);
-      result.set_size(size);
-      return make_error_code(errc::value_too_large);
-    }
-  }
-  std::fclose(file);
-  result.set_size(size);
-  return error_code::success();
-}
-
-error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,  
-                                            bool map_writable, void *&result) {
-  SmallString<128> path_storage;
-  StringRef name = path.toNullTerminatedStringRef(path_storage);
-  int oflags = map_writable ? O_RDWR : O_RDONLY;
-  int ofd = ::open(name.begin(), oflags);
-  if ( ofd == -1 )
-    return error_code(errno, system_category());
-  AutoFD fd(ofd);
-  int flags = map_writable ? MAP_SHARED : MAP_PRIVATE;
-  int prot = map_writable ? (PROT_READ|PROT_WRITE) : PROT_READ;
-#ifdef MAP_FILE
-  flags |= MAP_FILE;
-#endif
-  result = ::mmap(0, size, prot, flags, fd, file_offset);
-  if (result == MAP_FAILED) {
-    return error_code(errno, system_category());
-  }
-  
-  return error_code::success();
-}
-
-error_code unmap_file_pages(void *base, size_t size) {
-  if ( ::munmap(base, size) == -1 )
-    return error_code(errno, system_category());
-   
-  return error_code::success();
-}
-
-
-} // end namespace fs
-} // end namespace sys
-} // end namespace llvm