PathV1 is deprecated since the 18th of Dec 2010. Remove it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184960 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 0 insertions, 1164 deletions

diff --git a/lib/Support/CMakeLists.txt b/lib/Support/CMakeLists.txt
index 6cc8ab236a..7d27a29139 100644
--- a/lib/Support/CMakeLists.txt
+++ b/lib/Support/CMakeLists.txt
@@ -73,7 +73,6 @@ add_llvm_library(LLVMSupport
   IncludeFile.cpp
   Memory.cpp
   Mutex.cpp
-  Path.cpp
   PathV2.cpp
   Process.cpp
   Program.cpp
@@ -90,7 +89,6 @@ add_llvm_library(LLVMSupport
   Unix/Host.inc
   Unix/Memory.inc
   Unix/Mutex.inc
-  Unix/Path.inc
   Unix/PathV2.inc
   Unix/Process.inc
   Unix/Program.inc
@@ -104,7 +102,6 @@ add_llvm_library(LLVMSupport
   Windows/Host.inc
   Windows/Memory.inc
   Windows/Mutex.inc
-  Windows/Path.inc
   Windows/PathV2.inc
   Windows/Process.inc
   Windows/Program.inc
diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp
deleted file mode 100644
index 8e229ab88a..0000000000
--- a/lib/Support/Path.cpp
+++ /dev/null
@@ -1,78 +0,0 @@
-//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-//  This header file implements the operating system Path concept.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/Path.h"
-#include "llvm/Config/config.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/PathV1.h"
-#include <cassert>
-#include <cstring>
-#include <ostream>
-using namespace llvm;
-using namespace sys;
-namespace {
-using support::ulittle32_t;
-}
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only TRULY operating system
-//===          independent code.
-//===----------------------------------------------------------------------===//
-
-bool Path::operator==(const Path &that) const {
-  return path == that.path;
-}
-
-bool Path::operator<(const Path& that) const {
-  return path < that.path;
-}
-
-bool
-Path::isArchive() const {
-  fs::file_magic type;
-  if (fs::identify_magic(str(), type))
-    return false;
-  return type == fs::file_magic::archive;
-}
-
-bool
-Path::isDynamicLibrary() const {
-  fs::file_magic type;
-  if (fs::identify_magic(str(), type))
-    return false;
-  switch (type) {
-    default: return false;
-    case fs::file_magic::macho_fixed_virtual_memory_shared_lib:
-    case fs::file_magic::macho_dynamically_linked_shared_lib:
-    case fs::file_magic::macho_dynamically_linked_shared_lib_stub:
-    case fs::file_magic::elf_shared_object:
-    case fs::file_magic::pecoff_executable:  return true;
-  }
-}
-
-void
-Path::appendSuffix(StringRef suffix) {
-  if (!suffix.empty()) {
-    path.append(".");
-    path.append(suffix);
-  }
-}
-
-// Include the truly platform-specific parts of this class.
-#if defined(LLVM_ON_UNIX)
-#include "Unix/Path.inc"
-#endif
-#if defined(LLVM_ON_WIN32)
-#include "Windows/Path.inc"
-#endif
diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc
deleted file mode 100644
index 29ce9cb3fb..0000000000
--- a/lib/Support/Unix/Path.inc
+++ /dev/null
@@ -1,496 +0,0 @@
-//===- llvm/Support/Unix/Path.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 portion of the Path class.
-//
-//===----------------------------------------------------------------------===//
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic UNIX code that
-//===          is guaranteed to work on *all* UNIX variants.
-//===----------------------------------------------------------------------===//
-
-#include "Unix.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
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_UTIME_H
-#include <utime.h>
-#endif
-#if HAVE_TIME_H
-#include <time.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_DLFCN_H
-#include <dlfcn.h>
-#endif
-
-#ifdef __APPLE__
-#include <mach-o/dyld.h>
-#endif
-
-// For GNU Hurd
-#if defined(__GNU__) && !defined(MAXPATHLEN)
-# define MAXPATHLEN 4096
-#endif
-
-// Put in a hack for Cygwin which falsely reports that the mkdtemp function
-// is available when it is not.
-#ifdef __CYGWIN__
-# undef HAVE_MKDTEMP
-#endif
-
-namespace {
-inline bool lastIsSlash(const std::string& path) {
-  return !path.empty() && path[path.length() - 1] == '/';
-}
-
-}
-
-namespace llvm {
-using namespace sys;
-
-Path::Path(StringRef p)
-  : path(p) {}
-
-Path::Path(const char *StrStart, unsigned StrLen)
-  : path(StrStart, StrLen) {}
-
-Path&
-Path::operator=(StringRef that) {
-  path.assign(that.data(), that.size());
-  return *this;
-}
-
-bool
-Path::isValid() const {
-  // Empty paths are considered invalid here.
-  // This code doesn't check MAXPATHLEN because there's no need. Nothing in
-  // LLVM manipulates Paths with fixed-sizes arrays, and if the OS can't
-  // handle names longer than some limit, it'll report this on demand using
-  // ENAMETOLONG.
-  return !path.empty();
-}
-
-Path
-Path::GetTemporaryDirectory(std::string *ErrMsg) {
-#if defined(HAVE_MKDTEMP)
-  // The best way is with mkdtemp but that's not available on many systems,
-  // Linux and FreeBSD have it. Others probably won't.
-  char pathname[] = "/tmp/llvm_XXXXXX";
-  if (0 == mkdtemp(pathname)) {
-    MakeErrMsg(ErrMsg,
-               std::string(pathname) + ": can't create temporary directory");
-    return Path();
-  }
-  return Path(pathname);
-#elif defined(HAVE_MKSTEMP)
-  // If no mkdtemp is available, mkstemp can be used to create a temporary file
-  // which is then removed and created as a directory. We prefer this over
-  // mktemp because of mktemp's inherent security and threading risks. We still
-  // have a slight race condition from the time the temporary file is created to
-  // the time it is re-created as a directoy.
-  char pathname[] = "/tmp/llvm_XXXXXX";
-  int fd = 0;
-  if (-1 == (fd = mkstemp(pathname))) {
-    MakeErrMsg(ErrMsg,
-      std::string(pathname) + ": can't create temporary directory");
-    return Path();
-  }
-  ::close(fd);
-  ::unlink(pathname); // start race condition, ignore errors
-  if (-1 == ::mkdir(pathname, S_IRWXU)) { // end race condition
-    MakeErrMsg(ErrMsg,
-      std::string(pathname) + ": can't create temporary directory");
-    return Path();
-  }
-  return Path(pathname);
-#elif defined(HAVE_MKTEMP)
-  // If a system doesn't have mkdtemp(3) or mkstemp(3) but it does have
-  // mktemp(3) then we'll assume that system (e.g. AIX) has a reasonable
-  // implementation of mktemp(3) and doesn't follow BSD 4.3's lead of replacing
-  // the XXXXXX with the pid of the process and a letter. That leads to only
-  // twenty six temporary files that can be generated.
-  char pathname[] = "/tmp/llvm_XXXXXX";
-  char *TmpName = ::mktemp(pathname);
-  if (TmpName == 0) {
-    MakeErrMsg(ErrMsg,
-      std::string(TmpName) + ": can't create unique directory name");
-    return Path();
-  }
-  if (-1 == ::mkdir(TmpName, S_IRWXU)) {
-    MakeErrMsg(ErrMsg,
-        std::string(TmpName) + ": can't create temporary directory");
-    return Path();
-  }
-  return Path(TmpName);
-#else
-  // This is the worst case implementation. tempnam(3) leaks memory unless its
-  // on an SVID2 (or later) system. On BSD 4.3 it leaks. tmpnam(3) has thread
-  // issues. The mktemp(3) function doesn't have enough variability in the
-  // temporary name generated. So, we provide our own implementation that
-  // increments an integer from a random number seeded by the current time. This
-  // should be sufficiently unique that we don't have many collisions between
-  // processes. Generally LLVM processes don't run very long and don't use very
-  // many temporary files so this shouldn't be a big issue for LLVM.
-  static time_t num = ::time(0);
-  char pathname[MAXPATHLEN];
-  do {
-    num++;
-    sprintf(pathname, "/tmp/llvm_%010u", unsigned(num));
-  } while ( 0 == access(pathname, F_OK ) );
-  if (-1 == ::mkdir(pathname, S_IRWXU)) {
-    MakeErrMsg(ErrMsg,
-      std::string(pathname) + ": can't create temporary directory");
-    return Path();
-  }
-  return Path(pathname);
-#endif
-}
-
-Path
-Path::GetCurrentDirectory() {
-  char pathname[MAXPATHLEN];
-  if (!getcwd(pathname, MAXPATHLEN)) {
-    assert(false && "Could not query current working directory.");
-    return Path();
-  }
-
-  return Path(pathname);
-}
-
-bool
-Path::exists() const {
-  return 0 == access(path.c_str(), F_OK );
-}
-
-bool
-Path::isDirectory() const {
-  struct stat buf;
-  if (0 != stat(path.c_str(), &buf))
-    return false;
-  return ((buf.st_mode & S_IFMT) == S_IFDIR) ? true : false;
-}
-
-bool
-Path::isSymLink() const {
-  struct stat buf;
-  if (0 != lstat(path.c_str(), &buf))
-    return false;
-  return S_ISLNK(buf.st_mode);
-}
-
-bool
-Path::isRegularFile() const {
-  // Get the status so we can determine if it's a file or directory
-  struct stat buf;
-
-  if (0 != stat(path.c_str(), &buf))
-    return false;
-
-  if (S_ISREG(buf.st_mode))
-    return true;
-
-  return false;
-}
-
-static bool AddPermissionBits(const Path &File, int bits) {
-  // Get the umask value from the operating system.  We want to use it
-  // when changing the file's permissions. Since calling umask() sets
-  // the umask and returns its old value, we must call it a second
-  // time to reset it to the user's preference.
-  int mask = umask(0777); // The arg. to umask is arbitrary.
-  umask(mask);            // Restore the umask.
-
-  // Get the file's current mode.
-  struct stat buf;
-  if (0 != stat(File.c_str(), &buf))
-    return false;
-  // Change the file to have whichever permissions bits from 'bits'
-  // that the umask would not disable.
-  if ((chmod(File.c_str(), (buf.st_mode | (bits & ~mask)))) == -1)
-      return false;
-  return true;
-}
-
-bool Path::makeReadableOnDisk(std::string* ErrMsg) {
-  if (!AddPermissionBits(*this, 0444))
-    return MakeErrMsg(ErrMsg, path + ": can't make file readable");
-  return false;
-}
-
-bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
-  if (!AddPermissionBits(*this, 0222))
-    return MakeErrMsg(ErrMsg, path + ": can't make file writable");
-  return false;
-}
-
-bool
-Path::set(StringRef a_path) {
-  if (a_path.empty())
-    return false;
-  path = a_path;
-  return true;
-}
-
-bool
-Path::appendComponent(StringRef name) {
-  if (name.empty())
-    return false;
-  if (!lastIsSlash(path))
-    path += '/';
-  path += name;
-  return true;
-}
-
-bool
-Path::eraseComponent() {
-  size_t slashpos = path.rfind('/',path.size());
-  if (slashpos == 0 || slashpos == std::string::npos) {
-    path.erase();
-    return true;
-  }
-  if (slashpos == path.size() - 1)
-    slashpos = path.rfind('/',slashpos-1);
-  if (slashpos == std::string::npos) {
-    path.erase();
-    return true;
-  }
-  path.erase(slashpos);
-  return true;
-}
-
-bool
-Path::eraseSuffix() {
-  size_t dotpos = path.rfind('.',path.size());
-  size_t slashpos = path.rfind('/',path.size());
-  if (dotpos != std::string::npos) {
-    if (slashpos == std::string::npos || dotpos > slashpos+1) {
-      path.erase(dotpos, path.size()-dotpos);
-      return true;
-    }
-  }
-  return false;
-}
-
-static bool createDirectoryHelper(char* beg, char* end, bool create_parents) {
-
-  if (access(beg, R_OK | W_OK) == 0)
-    return false;
-
-  if (create_parents) {
-
-    char* c = end;
-
-    for (; c != beg; --c)
-      if (*c == '/') {
-
-        // Recurse to handling the parent directory.
-        *c = '\0';
-        bool x = createDirectoryHelper(beg, c, create_parents);
-        *c = '/';
-
-        // Return if we encountered an error.
-        if (x)
-          return true;
-
-        break;
-      }
-  }
-
-  return mkdir(beg, S_IRWXU | S_IRWXG) != 0;
-}
-
-bool
-Path::createDirectoryOnDisk( bool create_parents, std::string* ErrMsg ) {
-  // Get a writeable copy of the path name
-  std::string pathname(path);
-
-  // Null-terminate the last component
-  size_t lastchar = path.length() - 1 ;
-
-  if (pathname[lastchar] != '/')
-    ++lastchar;
-
-  pathname[lastchar] = '\0';
-
-  if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents))
-    return MakeErrMsg(ErrMsg, pathname + ": can't create directory");
-
-  return false;
-}
-
-bool
-Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
-  // Make this into a unique file name
-  if (makeUnique( reuse_current, ErrMsg ))
-    return true;
-
-  // create the file
-  int fd = ::open(path.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666);
-  if (fd < 0)
-    return MakeErrMsg(ErrMsg, path + ": can't create temporary file");
-  ::close(fd);
-  return false;
-}
-
-bool
-Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
-  // Get the status so we can determine if it's a file or directory.
-  struct stat buf;
-  if (0 != stat(path.c_str(), &buf)) {
-    MakeErrMsg(ErrStr, path + ": can't get status of file");
-    return true;
-  }
-
-  // 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)) {
-    if (unlink(path.c_str()) != 0)
-      return MakeErrMsg(ErrStr, path + ": can't destroy file");
-    return false;
-  }
-
-  if (!S_ISDIR(buf.st_mode)) {
-    if (ErrStr) *ErrStr = "not a file or directory";
-    return true;
-  }
-
-  if (remove_contents) {
-    // Recursively descend the directory to remove its contents.
-    std::string cmd = "/bin/rm -rf " + path;
-    if (system(cmd.c_str()) != 0) {
-      MakeErrMsg(ErrStr, path + ": failed to recursively remove directory.");
-      return true;
-    }
-    return false;
-  }
-
-  // Otherwise, try to just remove the one directory.
-  std::string pathname(path);
-  size_t lastchar = path.length() - 1;
-  if (pathname[lastchar] == '/')
-    pathname[lastchar] = '\0';
-  else
-    pathname[lastchar+1] = '\0';
-
-  if (rmdir(pathname.c_str()) != 0)
-    return MakeErrMsg(ErrStr, pathname + ": can't erase directory");
-  return false;
-}
-
-bool
-Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
-  if (0 != ::rename(path.c_str(), newName.c_str()))
-    return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
-               newName.str() + "'");
-  return false;
-}
-
-bool
-Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrStr) const {
-  struct utimbuf utb;
-  utb.actime = si.modTime.toPosixTime();
-  utb.modtime = utb.actime;
-  if (0 != ::utime(path.c_str(),&utb))
-    return MakeErrMsg(ErrStr, path + ": can't set file modification time");
-  if (0 != ::chmod(path.c_str(),si.mode))
-    return MakeErrMsg(ErrStr, path + ": can't set mode");
-  return false;
-}
-
-bool
-Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
-  bool Exists;
-  if (reuse_current && (fs::exists(path, Exists) || !Exists))
-    return false; // File doesn't exist already, just use it!
-
-  // Append an XXXXXX pattern to the end of the file for use with mkstemp,
-  // mktemp or our own implementation.
-  // This uses std::vector instead of SmallVector to avoid a dependence on
-  // libSupport. And performance isn't critical here.
-  std::vector<char> Buf;
-  Buf.resize(path.size()+8);
-  char *FNBuffer = &Buf[0];
-    path.copy(FNBuffer,path.size());
-  bool isdir;
-  if (!fs::is_directory(path, isdir) && isdir)
-    strcpy(FNBuffer+path.size(), "/XXXXXX");
-  else
-    strcpy(FNBuffer+path.size(), "-XXXXXX");
-
-#if defined(HAVE_MKSTEMP)
-  int TempFD;
-  if ((TempFD = mkstemp(FNBuffer)) == -1)
-    return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
-
-  // We don't need to hold the temp file descriptor... we will trust that no one
-  // will overwrite/delete the file before we can open it again.
-  close(TempFD);
-
-  // Save the name
-  path = FNBuffer;
-
-  // By default mkstemp sets the mode to 0600, so update mode bits now.
-  AddPermissionBits (*this, 0666);
-#elif defined(HAVE_MKTEMP)
-  // If we don't have mkstemp, use the old and obsolete mktemp function.
-  if (mktemp(FNBuffer) == 0)
-    return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
-
-  // Save the name
-  path = FNBuffer;
-#else
-  // Okay, looks like we have to do it all by our lonesome.
-  static unsigned FCounter = 0;
-  // Try to initialize with unique value.
-  if (FCounter == 0) FCounter = ((unsigned)getpid() & 0xFFFF) << 8;
-  char* pos = strstr(FNBuffer, "XXXXXX");
-  do {
-    if (++FCounter > 0xFFFFFF) {
-      return MakeErrMsg(ErrMsg,
-        path + ": can't make unique filename: too many files");
-    }
-    sprintf(pos, "%06X", FCounter);
-    path = FNBuffer;
-  } while (exists());
-  // POSSIBLE SECURITY BUG: An attacker can easily guess the name and exploit
-  // LLVM.
-#endif
-  return false;
-}
-} // end llvm namespace
diff --git a/lib/Support/Windows/Path.inc b/lib/Support/Windows/Path.inc
deleted file mode 100644
index 423c038504..0000000000
--- a/lib/Support/Windows/Path.inc
+++ /dev/null
@@ -1,587 +0,0 @@
-//===- llvm/Support/Win32/Path.cpp - Win32 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 provides the Win32 specific implementation of the Path class.
-//
-//===----------------------------------------------------------------------===//
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic Win32 code that
-//===          is guaranteed to work on *all* Win32 variants.
-//===----------------------------------------------------------------------===//
-
-#include "Windows.h"
-#include <cstdio>
-#include <malloc.h>
-
-// We need to undo a macro defined in Windows.h, otherwise we won't compile:
-#undef GetCurrentDirectory
-
-// Windows happily accepts either forward or backward slashes, though any path
-// returned by a Win32 API will have backward slashes.  As LLVM code basically
-// assumes forward slashes are used, backward slashs are converted where they
-// can be introduced into a path.
-//
-// Another invariant is that a path ends with a slash if and only if the path
-// is a root directory.  Any other use of a trailing slash is stripped.  Unlike
-// in Unix, Windows has a rather complicated notion of a root path and this
-// invariant helps simply the code.
-
-static void FlipBackSlashes(std::string& s) {
-  for (size_t i = 0; i < s.size(); i++)
-    if (s[i] == '\\')
-      s[i] = '/';
-}
-
-namespace llvm {
-namespace sys {
-
-Path::Path(llvm::StringRef p)
-  : path(p) {
-  FlipBackSlashes(path);
-}
-
-Path::Path(const char *StrStart, unsigned StrLen)
-  : path(StrStart, StrLen) {
-  FlipBackSlashes(path);
-}
-
-Path&
-Path::operator=(StringRef that) {
-  path.assign(that.data(), that.size());
-  FlipBackSlashes(path);
-  return *this;
-}
-
-bool
-Path::isValid() const {
-  if (path.empty())
-    return false;
-
-  size_t len = path.size();
-  // If there is a null character, it and all its successors are ignored.
-  size_t pos = path.find_first_of('\0');
-  if (pos != std::string::npos)
-    len = pos;
-
-  // If there is a colon, it must be the second character, preceded by a letter
-  // and followed by something.
-  pos = path.rfind(':',len);
-  size_t rootslash = 0;
-  if (pos != std::string::npos) {
-    if (pos != 1 || !isalpha(static_cast<unsigned char>(path[0])) || len < 3)
-      return false;
-      rootslash = 2;
-  }
-
-  // Look for a UNC path, and if found adjust our notion of the root slash.
-  if (len > 3 && path[0] == '/' && path[1] == '/') {
-    rootslash = path.find('/', 2);
-    if (rootslash == std::string::npos)
-      rootslash = 0;
-  }
-
-  // Check for illegal characters.
-  if (path.find_first_of("\\<>\"|\001\002\003\004\005\006\007\010\011\012"
-                         "\013\014\015\016\017\020\021\022\023\024\025\026"
-                         "\027\030\031\032\033\034\035\036\037")
-      != std::string::npos)
-    return false;
-
-  // Remove trailing slash, unless it's a root slash.
-  if (len > rootslash+1 && path[len-1] == '/')
-    path.erase(--len);
-
-  // Check each component for legality.
-  for (pos = 0; pos < len; ++pos) {
-    // A component may not end in a space.
-    if (path[pos] == ' ') {
-      if (pos+1 == len || path[pos+1] == '/' || path[pos+1] == '\0')
-        return false;
-    }
-
-    // A component may not end in a period.
-    if (path[pos] == '.') {
-      if (pos+1 == len || path[pos+1] == '/') {
-        // Unless it is the pseudo-directory "."...
-        if (pos == 0 || path[pos-1] == '/' || path[pos-1] == ':')
-          return true;
-        // or "..".
-        if (pos > 0 && path[pos-1] == '.') {
-          if (pos == 1 || path[pos-2] == '/' || path[pos-2] == ':')
-            return true;
-        }
-        return false;
-      }
-    }
-  }
-
-  return true;
-}
-
-void Path::makeAbsolute() {
-  TCHAR  FullPath[MAX_PATH + 1] = {0};
-  LPTSTR FilePart = NULL;
-
-  DWORD RetLength = ::GetFullPathNameA(path.c_str(),
-                        sizeof(FullPath)/sizeof(FullPath[0]),
-                        FullPath, &FilePart);
-
-  if (0 == RetLength) {
-    // FIXME: Report the error GetLastError()
-    assert(0 && "Unable to make absolute path!");
-  } else if (RetLength > MAX_PATH) {
-    // FIXME: Report too small buffer (needed RetLength bytes).
-    assert(0 && "Unable to make absolute path!");
-  } else {
-    path = FullPath;
-  }
-}
-
-static Path *TempDirectory;
-
-Path
-Path::GetTemporaryDirectory(std::string* ErrMsg) {
-  if (TempDirectory) {
-#if defined(_MSC_VER)
-    // Visual Studio gets confused and emits a diagnostic about calling exists,
-    // even though this is the implementation for PathV1.  Temporarily 
-    // disable the deprecated warning message
-    #pragma warning(push)
-    #pragma warning(disable:4996)
-#endif
-    assert(TempDirectory->exists() && "Who has removed TempDirectory?");
-#if defined(_MSC_VER)
-    #pragma warning(pop)
-#endif
-    return *TempDirectory;
-  }
-
-  char pathname[MAX_PATH];
-  if (!GetTempPath(MAX_PATH, pathname)) {
-    if (ErrMsg)
-      *ErrMsg = "Can't determine temporary directory";
-    return Path();
-  }
-
-  Path result;
-  result.set(pathname);
-
-  // Append a subdirectory based on our process id so multiple LLVMs don't
-  // step on each other's toes.
-#ifdef __MINGW32__
-  // Mingw's Win32 header files are broken.
-  sprintf(pathname, "LLVM_%u", unsigned(GetCurrentProcessId()));
-#else
-  sprintf(pathname, "LLVM_%u", GetCurrentProcessId());
-#endif
-  result.appendComponent(pathname);
-
-  // If there's a directory left over from a previous LLVM execution that
-  // happened to have the same process id, get rid of it.
-  result.eraseFromDisk(true);
-
-  // And finally (re-)create the empty directory.
-  result.createDirectoryOnDisk(false);
-  TempDirectory = new Path(result);
-  return *TempDirectory;
-}
-
-Path
-Path::GetCurrentDirectory() {
-  char pathname[MAX_PATH];
-  ::GetCurrentDirectoryA(MAX_PATH,pathname);
-  return Path(pathname);
-}
-
-// FIXME: the above set of functions don't map to Windows very well.
-
-bool
-Path::exists() const {
-  DWORD attr = GetFileAttributes(path.c_str());
-  return attr != INVALID_FILE_ATTRIBUTES;
-}
-
-bool
-Path::isDirectory() const {
-  DWORD attr = GetFileAttributes(path.c_str());
-  return (attr != INVALID_FILE_ATTRIBUTES) &&
-         (attr & FILE_ATTRIBUTE_DIRECTORY);
-}
-
-bool
-Path::isSymLink() const {
-  DWORD attributes = GetFileAttributes(path.c_str());
-
-  if (attributes == INVALID_FILE_ATTRIBUTES)
-    // There's no sane way to report this :(.
-    assert(0 && "GetFileAttributes returned INVALID_FILE_ATTRIBUTES");
-
-  // This isn't exactly what defines a NTFS symlink, but it is only true for
-  // paths that act like a symlink.
-  return attributes & FILE_ATTRIBUTE_REPARSE_POINT;
-}
-
-bool
-Path::isRegularFile() const {
-  bool res;
-  if (fs::is_regular_file(path, res))
-    return false;
-  return res;
-}
-
-bool Path::makeReadableOnDisk(std::string* ErrMsg) {
-  // All files are readable on Windows (ignoring security attributes).
-  return false;
-}
-
-bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
-  DWORD attr = GetFileAttributes(path.c_str());
-
-  // If it doesn't exist, we're done.
-  if (attr == INVALID_FILE_ATTRIBUTES)
-    return false;
-
-  if (attr & FILE_ATTRIBUTE_READONLY) {
-    if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY)) {
-      MakeErrMsg(ErrMsg, std::string(path) + ": Can't make file writable: ");
-      return true;
-    }
-  }
-  return false;
-}
-
-bool
-Path::set(StringRef a_path) {
-  if (a_path.empty())
-    return false;
-  std::string save(path);
-  path = a_path;
-  FlipBackSlashes(path);
-  if (!isValid()) {
-    path = save;
-    return false;
-  }
-  return true;
-}
-
-bool
-Path::appendComponent(StringRef name) {
-  if (name.empty())
-    return false;
-  std::string save(path);
-  if (!path.empty()) {
-    size_t last = path.size() - 1;
-    if (path[last] != '/')
-      path += '/';
-  }
-  path += name;
-  if (!isValid()) {
-    path = save;
-    return false;
-  }
-  return true;
-}
-
-bool
-Path::eraseComponent() {
-  size_t slashpos = path.rfind('/',path.size());
-  if (slashpos == path.size() - 1 || slashpos == std::string::npos)
-    return false;
-  std::string save(path);
-  path.erase(slashpos);
-  if (!isValid()) {
-    path = save;
-    return false;
-  }
-  return true;
-}
-
-bool
-Path::eraseSuffix() {
-  size_t dotpos = path.rfind('.',path.size());
-  size_t slashpos = path.rfind('/',path.size());
-  if (dotpos != std::string::npos) {
-    if (slashpos == std::string::npos || dotpos > slashpos+1) {
-      std::string save(path);
-      path.erase(dotpos, path.size()-dotpos);
-      if (!isValid()) {
-        path = save;
-        return false;
-      }
-      return true;
-    }
-  }
-  return false;
-}
-
-inline bool PathMsg(std::string* ErrMsg, const char* pathname, const char*msg) {
-  if (ErrMsg)
-    *ErrMsg = std::string(pathname) + ": " + std::string(msg);
-  return true;
-}
-
-bool
-Path::createDirectoryOnDisk(bool create_parents, std::string* ErrMsg) {
-  // Get a writeable copy of the path name
-  size_t len = path.length();
-  char *pathname = reinterpret_cast<char *>(_alloca(len+2));
-  path.copy(pathname, len);
-  pathname[len] = 0;
-
-  // Make sure it ends with a slash.
-  if (len == 0 || pathname[len - 1] != '/') {
-    pathname[len] = '/';
-    pathname[++len] = 0;
-  }
-
-  // Determine starting point for initial / search.
-  char *next = pathname;
-  if (pathname[0] == '/' && pathname[1] == '/') {
-    // Skip host name.
-    next = strchr(pathname+2, '/');
-    if (next == NULL)
-      return PathMsg(ErrMsg, pathname, "badly formed remote directory");
-
-    // Skip share name.
-    next = strchr(next+1, '/');
-    if (next == NULL)
-      return PathMsg(ErrMsg, pathname,"badly formed remote directory");
-
-    next++;
-    if (*next == 0)
-      return PathMsg(ErrMsg, pathname, "badly formed remote directory");
-
-  } else {
-    if (pathname[1] == ':')
-      next += 2;    // skip drive letter
-    if (*next == '/')
-      next++;       // skip root directory
-  }
-
-  // If we're supposed to create intermediate directories
-  if (create_parents) {
-    // Loop through the directory components until we're done
-    while (*next) {
-      next = strchr(next, '/');
-      *next = 0;
-      if (!CreateDirectory(pathname, NULL) &&
-          GetLastError() != ERROR_ALREADY_EXISTS)
-          return MakeErrMsg(ErrMsg,
-            std::string(pathname) + ": Can't create directory: ");
-      *next++ = '/';
-    }
-  } else {
-    // Drop trailing slash.
-    pathname[len-1] = 0;
-    if (!CreateDirectory(pathname, NULL) &&
-        GetLastError() != ERROR_ALREADY_EXISTS) {
-      return MakeErrMsg(ErrMsg, std::string(pathname) +
-                        ": Can't create directory: ");
-    }
-  }
-  return false;
-}
-
-bool
-Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
-  WIN32_FILE_ATTRIBUTE_DATA fi;
-  if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &fi))
-    return true;
-
-  if (fi.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
-    // If it doesn't exist, we're done.
-    bool Exists;
-    if (fs::exists(path, Exists) || !Exists)
-      return false;
-
-    char *pathname = reinterpret_cast<char *>(_alloca(path.length()+3));
-    int lastchar = path.length() - 1 ;
-    path.copy(pathname, lastchar+1);
-
-    // Make path end with '/*'.
-    if (pathname[lastchar] != '/')
-      pathname[++lastchar] = '/';
-    pathname[lastchar+1] = '*';
-    pathname[lastchar+2] = 0;
-
-    if (remove_contents) {
-      WIN32_FIND_DATA fd;
-      HANDLE h = FindFirstFile(pathname, &fd);
-
-      // It's a bad idea to alter the contents of a directory while enumerating
-      // its contents. So build a list of its contents first, then destroy them.
-
-      if (h != INVALID_HANDLE_VALUE) {
-        std::vector<Path> list;
-
-        do {
-          if (strcmp(fd.cFileName, ".") == 0)
-            continue;
-          if (strcmp(fd.cFileName, "..") == 0)
-            continue;
-
-          Path aPath(path);
-          aPath.appendComponent(&fd.cFileName[0]);
-          list.push_back(aPath);
-        } while (FindNextFile(h, &fd));
-
-        DWORD err = GetLastError();
-        FindClose(h);
-        if (err != ERROR_NO_MORE_FILES) {
-          SetLastError(err);
-          return MakeErrMsg(ErrStr, path + ": Can't read directory: ");
-        }
-
-        for (std::vector<Path>::iterator I = list.begin(); I != list.end();
-             ++I) {
-          Path &aPath = *I;
-          aPath.eraseFromDisk(true);
-        }
-      } else {
-        if (GetLastError() != ERROR_FILE_NOT_FOUND)
-          return MakeErrMsg(ErrStr, path + ": Can't read directory: ");
-      }
-    }
-
-    pathname[lastchar] = 0;
-    if (!RemoveDirectory(pathname))
-      return MakeErrMsg(ErrStr,
-        std::string(pathname) + ": Can't destroy directory: ");
-    return false;
-  } else {
-    // Read-only files cannot be deleted on Windows.  Must remove the read-only
-    // attribute first.
-    if (fi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
-      if (!SetFileAttributes(path.c_str(),
-                             fi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY))
-        return MakeErrMsg(ErrStr, path + ": Can't destroy file: ");
-    }
-
-    if (!DeleteFile(path.c_str()))
-      return MakeErrMsg(ErrStr, path + ": Can't destroy file: ");
-    return false;
-  }
-}
-
-bool
-Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
-  if (!MoveFileEx(path.c_str(), newName.c_str(), MOVEFILE_REPLACE_EXISTING))
-    return MakeErrMsg(ErrMsg, "Can't move '" + path + "' to '" + newName.path
-        + "': ");
-  return false;
-}
-
-bool
-Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrMsg) const {
-  // FIXME: should work on directories also.
-  if (!si.isFile) {
-    return true;
-  }
-
-  HANDLE h = CreateFile(path.c_str(),
-                        FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES,
-                        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
-                        NULL,
-                        OPEN_EXISTING,
-                        FILE_ATTRIBUTE_NORMAL,
-                        NULL);
-  if (h == INVALID_HANDLE_VALUE)
-    return true;
-
-  BY_HANDLE_FILE_INFORMATION bhfi;
-  if (!GetFileInformationByHandle(h, &bhfi)) {
-    DWORD err = GetLastError();
-    CloseHandle(h);
-    SetLastError(err);
-    return MakeErrMsg(ErrMsg, path + ": GetFileInformationByHandle: ");
-  }
-
-  ULARGE_INTEGER ui;
-  ui.QuadPart = si.modTime.toWin32Time();
-  FILETIME ft;
-  ft.dwLowDateTime = ui.LowPart;
-  ft.dwHighDateTime = ui.HighPart;
-  BOOL ret = SetFileTime(h, NULL, &ft, &ft);
-  DWORD err = GetLastError();
-  CloseHandle(h);
-  if (!ret) {
-    SetLastError(err);
-    return MakeErrMsg(ErrMsg, path + ": SetFileTime: ");
-  }
-
-  // Best we can do with Unix permission bits is to interpret the owner
-  // writable bit.
-  if (si.mode & 0200) {
-    if (bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
-      if (!SetFileAttributes(path.c_str(),
-              bhfi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY))
-        return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: ");
-    }
-  } else {
-    if (!(bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
-      if (!SetFileAttributes(path.c_str(),
-              bhfi.dwFileAttributes | FILE_ATTRIBUTE_READONLY))
-        return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: ");
-    }
-  }
-
-  return false;
-}
-
-bool
-Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
-  bool Exists;
-  if (reuse_current && (fs::exists(path, Exists) || !Exists))
-    return false; // File doesn't exist already, just use it!
-
-  // Reserve space for -XXXXXX at the end.
-  char *FNBuffer = (char*) alloca(path.size()+8);
-  unsigned offset = path.size();
-  path.copy(FNBuffer, offset);
-
-  // Find a numeric suffix that isn't used by an existing file.  Assume there
-  // won't be more than 1 million files with the same prefix.  Probably a safe
-  // bet.
-  static int FCounter = -1;
-  if (FCounter < 0) {
-    // Give arbitrary initial seed.
-    // FIXME: We should use sys::fs::unique_file() in future.
-    LARGE_INTEGER cnt64;
-    DWORD x = GetCurrentProcessId();
-    x = (x << 16) | (x >> 16);
-    if (QueryPerformanceCounter(&cnt64))    // RDTSC
-      x ^= cnt64.HighPart ^ cnt64.LowPart;
-    FCounter = x % 1000000;
-  }
-  do {
-    sprintf(FNBuffer+offset, "-%06u", FCounter);
-    if (++FCounter > 999999)
-      FCounter = 0;
-    path = FNBuffer;
-  } while (!fs::exists(path, Exists) && Exists);
-  return false;
-}
-
-bool
-Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
-  // Make this into a unique file name
-  makeUnique(reuse_current, ErrMsg);
-
-  // Now go and create it
-  HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
-                        FILE_ATTRIBUTE_NORMAL, NULL);
-  if (h == INVALID_HANDLE_VALUE)
-    return MakeErrMsg(ErrMsg, path + ": can't create file");
-
-  CloseHandle(h);
-  return false;
-}
-}
-}