Remove dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186561 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/FileSystem.h

@@ -73,22 +73,6 @@ struct file_type {
   int v_;
 };
 
-/// copy_option - An "enum class" enumeration of copy semantics for copy
-///               operations.
-struct copy_option {
-  enum _ {
-    fail_if_exists,
-    overwrite_if_exists
-  };
-
-  copy_option(_ v) : v_(v) {}
-  explicit copy_option(int v) : v_(_(v)) {}
-  operator int() const {return v_;}
-
-private:
-  int v_;
-};
-
 /// space_info - Self explanatory.
 struct space_info {
   uint64_t capacity;
@@ -269,18 +253,6 @@ struct file_magic {
 ///          platform specific error_code.
 error_code make_absolute(SmallVectorImpl<char> &path);
 
-/// @brief Copy the file at \a from to the path \a to.
-///
-/// @param from The path to copy the file from.
-/// @param to The path to copy the file to.
-/// @param copt Behavior if \a to already exists.
-/// @returns errc::success if the file has been successfully copied.
-///          errc::file_exists if \a to already exists and \a copt ==
-///          copy_option::fail_if_exists. Otherwise a platform specific
-///          error_code.
-error_code copy_file(const Twine &from, const Twine &to,
-                     copy_option copt = copy_option::fail_if_exists);
-
 /// @brief Create all the non-existent directories in path.
 ///
 /// @param path Directories to create.

lib/Support/Unix/Path.inc

@@ -320,65 +320,6 @@ error_code current_path(SmallVectorImpl<char> &result) {
   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);

lib/Support/Windows/Path.inc

@@ -324,29 +324,6 @@ retry_cur_dir:
   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.toStringRef(from_storage);
-  StringRef t = to.toStringRef(to_storage);
-
-  // Convert to utf-16.
-  SmallVector<wchar_t, 128> wide_from;
-  SmallVector<wchar_t, 128> wide_to;
-  if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
-  if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
-
-  // Copy the file.
-  BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(),
-                         copt != copy_option::overwrite_if_exists);
-
-  if (res == 0)
-    return windows_error(::GetLastError());
-
-  return error_code::success();
-}
-
 error_code create_directory(const Twine &path, bool &existed) {
   SmallString<128> path_storage;
   SmallVector<wchar_t, 128> path_utf16;

unittests/Support/Path.cpp

@@ -219,14 +219,8 @@ TEST_F(FileSystemTest, TempFiles) {
   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
   EXPECT_FALSE(fs::equivalent(A, B));
 
-  // Try to copy the first to the second.
-  EXPECT_EQ(
-    fs::copy_file(Twine(TempPath), Twine(TempPath2)), errc::file_exists);
-
   ::close(FD2);
-  // Try again with the proper options.
-  ASSERT_NO_ERROR(fs::copy_file(Twine(TempPath), Twine(TempPath2),
-                                fs::copy_option::overwrite_if_exists));
+
   // Remove Temp2.
   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2), TempFileExists));
   EXPECT_TRUE(TempFileExists);