Move file_util to base/files/ directory.

base/file_util.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/file_util.h"
-
-#if defined(OS_WIN)
-#include <io.h>
-#endif
-#include <stdio.h>
-
-#include <fstream>
-#include <limits>
-
-#include "base/files/file_enumerator.h"
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/strings/string_piece.h"
-#include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/strings/utf_string_conversions.h"
-
-namespace base {
-
-namespace {
-
-// The maximum number of 'uniquified' files we will try to create.
-// This is used when the filename we're trying to download is already in use,
-// so we create a new unique filename by appending " (nnn)" before the
-// extension, where 1 <= nnn <= kMaxUniqueFiles.
-// Also used by code that cleans up said files.
-static const int kMaxUniqueFiles = 100;
-
-}  // namespace
-
-int64 ComputeDirectorySize(const FilePath& root_path) {
-  int64 running_size = 0;
-  FileEnumerator file_iter(root_path, true, FileEnumerator::FILES);
-  while (!file_iter.Next().empty())
-    running_size += file_iter.GetInfo().GetSize();
-  return running_size;
-}
-
-bool Move(const FilePath& from_path, const FilePath& to_path) {
-  if (from_path.ReferencesParent() || to_path.ReferencesParent())
-    return false;
-  return internal::MoveUnsafe(from_path, to_path);
-}
-
-bool CopyFile(const FilePath& from_path, const FilePath& to_path) {
-  if (from_path.ReferencesParent() || to_path.ReferencesParent())
-    return false;
-  return internal::CopyFileUnsafe(from_path, to_path);
-}
-
-bool ContentsEqual(const FilePath& filename1, const FilePath& filename2) {
-  // We open the file in binary format even if they are text files because
-  // we are just comparing that bytes are exactly same in both files and not
-  // doing anything smart with text formatting.
-  std::ifstream file1(filename1.value().c_str(),
-                      std::ios::in | std::ios::binary);
-  std::ifstream file2(filename2.value().c_str(),
-                      std::ios::in | std::ios::binary);
-
-  // Even if both files aren't openable (and thus, in some sense, "equal"),
-  // any unusable file yields a result of "false".
-  if (!file1.is_open() || !file2.is_open())
-    return false;
-
-  const int BUFFER_SIZE = 2056;
-  char buffer1[BUFFER_SIZE], buffer2[BUFFER_SIZE];
-  do {
-    file1.read(buffer1, BUFFER_SIZE);
-    file2.read(buffer2, BUFFER_SIZE);
-
-    if ((file1.eof() != file2.eof()) ||
-        (file1.gcount() != file2.gcount()) ||
-        (memcmp(buffer1, buffer2, file1.gcount()))) {
-      file1.close();
-      file2.close();
-      return false;
-    }
-  } while (!file1.eof() || !file2.eof());
-
-  file1.close();
-  file2.close();
-  return true;
-}
-
-bool TextContentsEqual(const FilePath& filename1, const FilePath& filename2) {
-  std::ifstream file1(filename1.value().c_str(), std::ios::in);
-  std::ifstream file2(filename2.value().c_str(), std::ios::in);
-
-  // Even if both files aren't openable (and thus, in some sense, "equal"),
-  // any unusable file yields a result of "false".
-  if (!file1.is_open() || !file2.is_open())
-    return false;
-
-  do {
-    std::string line1, line2;
-    getline(file1, line1);
-    getline(file2, line2);
-
-    // Check for mismatched EOF states, or any error state.
-    if ((file1.eof() != file2.eof()) ||
-        file1.bad() || file2.bad()) {
-      return false;
-    }
-
-    // Trim all '\r' and '\n' characters from the end of the line.
-    std::string::size_type end1 = line1.find_last_not_of("\r\n");
-    if (end1 == std::string::npos)
-      line1.clear();
-    else if (end1 + 1 < line1.length())
-      line1.erase(end1 + 1);
-
-    std::string::size_type end2 = line2.find_last_not_of("\r\n");
-    if (end2 == std::string::npos)
-      line2.clear();
-    else if (end2 + 1 < line2.length())
-      line2.erase(end2 + 1);
-
-    if (line1 != line2)
-      return false;
-  } while (!file1.eof() || !file2.eof());
-
-  return true;
-}
-
-bool ReadFileToString(const FilePath& path,
-                      std::string* contents,
-                      size_t max_size) {
-  if (contents)
-    contents->clear();
-  if (path.ReferencesParent())
-    return false;
-  FILE* file = OpenFile(path, "rb");
-  if (!file) {
-    return false;
-  }
-
-  char buf[1 << 16];
-  size_t len;
-  size_t size = 0;
-  bool read_status = true;
-
-  // Many files supplied in |path| have incorrect size (proc files etc).
-  // Hence, the file is read sequentially as opposed to a one-shot read.
-  while ((len = fread(buf, 1, sizeof(buf), file)) > 0) {
-    if (contents)
-      contents->append(buf, std::min(len, max_size - size));
-
-    if ((max_size - size) < len) {
-      read_status = false;
-      break;
-    }
-
-    size += len;
-  }
-  read_status = read_status && !ferror(file);
-  CloseFile(file);
-
-  return read_status;
-}
-
-bool ReadFileToString(const FilePath& path, std::string* contents) {
-  return ReadFileToString(path, contents, std::numeric_limits<size_t>::max());
-}
-
-bool IsDirectoryEmpty(const FilePath& dir_path) {
-  FileEnumerator files(dir_path, false,
-      FileEnumerator::FILES | FileEnumerator::DIRECTORIES);
-  if (files.Next().empty())
-    return true;
-  return false;
-}
-
-FILE* CreateAndOpenTemporaryFile(FilePath* path) {
-  FilePath directory;
-  if (!GetTempDir(&directory))
-    return NULL;
-
-  return CreateAndOpenTemporaryFileInDir(directory, path);
-}
-
-bool CreateDirectory(const FilePath& full_path) {
-  return CreateDirectoryAndGetError(full_path, NULL);
-}
-
-bool GetFileSize(const FilePath& file_path, int64* file_size) {
-  File::Info info;
-  if (!GetFileInfo(file_path, &info))
-    return false;
-  *file_size = info.size;
-  return true;
-}
-
-bool TouchFile(const FilePath& path,
-               const Time& last_accessed,
-               const Time& last_modified) {
-  int flags = File::FLAG_OPEN | File::FLAG_WRITE_ATTRIBUTES;
-
-#if defined(OS_WIN)
-  // On Windows, FILE_FLAG_BACKUP_SEMANTICS is needed to open a directory.
-  if (DirectoryExists(path))
-    flags |= File::FLAG_BACKUP_SEMANTICS;
-#endif  // OS_WIN
-
-  File file(path, flags);
-  if (!file.IsValid())
-    return false;
-
-  return file.SetTimes(last_accessed, last_modified);
-}
-
-bool CloseFile(FILE* file) {
-  if (file == NULL)
-    return true;
-  return fclose(file) == 0;
-}
-
-bool TruncateFile(FILE* file) {
-  if (file == NULL)
-    return false;
-  long current_offset = ftell(file);
-  if (current_offset == -1)
-    return false;
-#if defined(OS_WIN)
-  int fd = _fileno(file);
-  if (_chsize(fd, current_offset) != 0)
-    return false;
-#else
-  int fd = fileno(file);
-  if (ftruncate(fd, current_offset) != 0)
-    return false;
-#endif
-  return true;
-}
-
-int GetUniquePathNumber(const FilePath& path,
-                        const FilePath::StringType& suffix) {
-  bool have_suffix = !suffix.empty();
-  if (!PathExists(path) &&
-      (!have_suffix || !PathExists(FilePath(path.value() + suffix)))) {
-    return 0;
-  }
-
-  FilePath new_path;
-  for (int count = 1; count <= kMaxUniqueFiles; ++count) {
-    new_path = path.InsertBeforeExtensionASCII(StringPrintf(" (%d)", count));
-    if (!PathExists(new_path) &&
-        (!have_suffix || !PathExists(FilePath(new_path.value() + suffix)))) {
-      return count;
-    }
-  }
-
-  return -1;
-}
-
-}  // namespace base