Move webrtc/{base => rtc_base}

webrtc/base/filerotatingstream.cc

Index: webrtc/base/filerotatingstream.cc
diff --git a/webrtc/base/filerotatingstream.cc b/webrtc/base/filerotatingstream.cc
deleted file mode 100644
index d1434de9dd5bd3f73adc7ce1e3b561ae856c8796..0000000000000000000000000000000000000000
--- a/webrtc/base/filerotatingstream.cc
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/filerotatingstream.h"
-
-#include <algorithm>
-#include <iostream>
-#include <string>
-
-#include "webrtc/base/checks.h"
-#include "webrtc/base/fileutils.h"
-#include "webrtc/base/pathutils.h"
-
-// Note: We use std::cerr for logging in the write paths of this stream to avoid
-// infinite loops when logging.
-
-namespace rtc {
-
-FileRotatingStream::FileRotatingStream(const std::string& dir_path,
-                                       const std::string& file_prefix)
-    : FileRotatingStream(dir_path, file_prefix, 0, 0, kRead) {
-}
-
-FileRotatingStream::FileRotatingStream(const std::string& dir_path,
-                                       const std::string& file_prefix,
-                                       size_t max_file_size,
-                                       size_t num_files)
-    : FileRotatingStream(dir_path,
-                         file_prefix,
-                         max_file_size,
-                         num_files,
-                         kWrite) {
-  RTC_DCHECK_GT(max_file_size, 0);
-  RTC_DCHECK_GT(num_files, 1);
-}
-
-FileRotatingStream::FileRotatingStream(const std::string& dir_path,
-                                       const std::string& file_prefix,
-                                       size_t max_file_size,
-                                       size_t num_files,
-                                       Mode mode)
-    : dir_path_(dir_path),
-      file_prefix_(file_prefix),
-      mode_(mode),
-      file_stream_(nullptr),
-      max_file_size_(max_file_size),
-      current_file_index_(0),
-      rotation_index_(0),
-      current_bytes_written_(0),
-      disable_buffering_(false) {
-  RTC_DCHECK(Filesystem::IsFolder(dir_path));
-  switch (mode) {
-    case kWrite: {
-      file_names_.clear();
-      for (size_t i = 0; i < num_files; ++i) {
-        file_names_.push_back(GetFilePath(i, num_files));
-      }
-      rotation_index_ = num_files - 1;
-      break;
-    }
-    case kRead: {
-      file_names_ = GetFilesWithPrefix();
-      std::sort(file_names_.begin(), file_names_.end());
-      if (file_names_.size() > 0) {
-        // |file_names_| is sorted newest first, so read from the end.
-        current_file_index_ = file_names_.size() - 1;
-      }
-      break;
-    }
-  }
-}
-
-FileRotatingStream::~FileRotatingStream() {
-}
-
-StreamState FileRotatingStream::GetState() const {
-  if (mode_ == kRead && current_file_index_ < file_names_.size()) {
-    return SS_OPEN;
-  }
-  if (!file_stream_) {
-    return SS_CLOSED;
-  }
-  return file_stream_->GetState();
-}
-
-StreamResult FileRotatingStream::Read(void* buffer,
-                                      size_t buffer_len,
-                                      size_t* read,
-                                      int* error) {
-  RTC_DCHECK(buffer);
-  if (mode_ != kRead) {
-    return SR_EOS;
-  }
-  if (current_file_index_ >= file_names_.size()) {
-    return SR_EOS;
-  }
-  // We will have no file stream initially, and when we are finished with the
-  // previous file.
-  if (!file_stream_) {
-    if (!OpenCurrentFile()) {
-      return SR_ERROR;
-    }
-  }
-  int local_error = 0;
-  if (!error) {
-    error = &local_error;
-  }
-  StreamResult result = file_stream_->Read(buffer, buffer_len, read, error);
-  if (result == SR_EOS || result == SR_ERROR) {
-    if (result == SR_ERROR) {
-      LOG(LS_ERROR) << "Failed to read from: "
-                    << file_names_[current_file_index_] << "Error: " << error;
-    }
-    // Reached the end of the file, read next file. If there is an error return
-    // the error status but allow for a next read by reading next file.
-    CloseCurrentFile();
-    if (current_file_index_ == 0) {
-      // Just finished reading the last file, signal EOS by setting index.
-      current_file_index_ = file_names_.size();
-    } else {
-      --current_file_index_;
-    }
-    if (read) {
-      *read = 0;
-    }
-    return result == SR_EOS ? SR_SUCCESS : result;
-  } else if (result == SR_SUCCESS) {
-    // Succeeded, continue reading from this file.
-    return SR_SUCCESS;
-  } else {
-    RTC_NOTREACHED();
-  }
-  return result;
-}
-
-StreamResult FileRotatingStream::Write(const void* data,
-                                       size_t data_len,
-                                       size_t* written,
-                                       int* error) {
-  if (mode_ != kWrite) {
-    return SR_EOS;
-  }
-  if (!file_stream_) {
-    std::cerr << "Open() must be called before Write." << std::endl;
-    return SR_ERROR;
-  }
-  // Write as much as will fit in to the current file.
-  RTC_DCHECK_LT(current_bytes_written_, max_file_size_);
-  size_t remaining_bytes = max_file_size_ - current_bytes_written_;
-  size_t write_length = std::min(data_len, remaining_bytes);
-  size_t local_written = 0;
-  if (!written) {
-    written = &local_written;
-  }
-  StreamResult result = file_stream_->Write(data, write_length, written, error);
-  current_bytes_written_ += *written;
-
-  // If we're done with this file, rotate it out.
-  if (current_bytes_written_ >= max_file_size_) {
-    RTC_DCHECK_EQ(current_bytes_written_, max_file_size_);
-    RotateFiles();
-  }
-  return result;
-}
-
-bool FileRotatingStream::Flush() {
-  if (!file_stream_) {
-    return false;
-  }
-  return file_stream_->Flush();
-}
-
-bool FileRotatingStream::GetSize(size_t* size) const {
-  if (mode_ != kRead) {
-    // Not possible to get accurate size on disk when writing because of
-    // potential buffering.
-    return false;
-  }
-  RTC_DCHECK(size);
-  *size = 0;
-  size_t total_size = 0;
-  for (auto file_name : file_names_) {
-    Pathname pathname(file_name);
-    size_t file_size = 0;
-    if (Filesystem::GetFileSize(file_name, &file_size)) {
-      total_size += file_size;
-    }
-  }
-  *size = total_size;
-  return true;
-}
-
-void FileRotatingStream::Close() {
-  CloseCurrentFile();
-}
-
-bool FileRotatingStream::Open() {
-  switch (mode_) {
-    case kRead:
-      // Defer opening to when we first read since we want to return read error
-      // if we fail to open next file.
-      return true;
-    case kWrite: {
-      // Delete existing files when opening for write.
-      std::vector<std::string> matching_files = GetFilesWithPrefix();
-      for (auto matching_file : matching_files) {
-        if (!Filesystem::DeleteFile(matching_file)) {
-          std::cerr << "Failed to delete: " << matching_file << std::endl;
-        }
-      }
-      return OpenCurrentFile();
-    }
-  }
-  return false;
-}
-
-bool FileRotatingStream::DisableBuffering() {
-  disable_buffering_ = true;
-  if (!file_stream_) {
-    std::cerr << "Open() must be called before DisableBuffering()."
-              << std::endl;
-    return false;
-  }
-  return file_stream_->DisableBuffering();
-}
-
-std::string FileRotatingStream::GetFilePath(size_t index) const {
-  RTC_DCHECK_LT(index, file_names_.size());
-  return file_names_[index];
-}
-
-bool FileRotatingStream::OpenCurrentFile() {
-  CloseCurrentFile();
-
-  // Opens the appropriate file in the appropriate mode.
-  RTC_DCHECK_LT(current_file_index_, file_names_.size());
-  std::string file_path = file_names_[current_file_index_];
-  file_stream_.reset(new FileStream());
-  const char* mode = nullptr;
-  switch (mode_) {
-    case kWrite:
-      mode = "w+";
-      // We should always we writing to the zero-th file.
-      RTC_DCHECK_EQ(current_file_index_, 0);
-      break;
-    case kRead:
-      mode = "r";
-      break;
-  }
-  int error = 0;
-  if (!file_stream_->Open(file_path, mode, &error)) {
-    std::cerr << "Failed to open: " << file_path << "Error: " << error
-              << std::endl;
-    file_stream_.reset();
-    return false;
-  }
-  if (disable_buffering_) {
-    file_stream_->DisableBuffering();
-  }
-  return true;
-}
-
-void FileRotatingStream::CloseCurrentFile() {
-  if (!file_stream_) {
-    return;
-  }
-  current_bytes_written_ = 0;
-  file_stream_.reset();
-}
-
-void FileRotatingStream::RotateFiles() {
-  RTC_DCHECK_EQ(mode_, kWrite);
-  CloseCurrentFile();
-  // Rotates the files by deleting the file at |rotation_index_|, which is the
-  // oldest file and then renaming the newer files to have an incremented index.
-  // See header file comments for example.
-  RTC_DCHECK_LT(rotation_index_, file_names_.size());
-  std::string file_to_delete = file_names_[rotation_index_];
-  if (Filesystem::IsFile(file_to_delete)) {
-    if (!Filesystem::DeleteFile(file_to_delete)) {
-      std::cerr << "Failed to delete: " << file_to_delete << std::endl;
-    }
-  }
-  for (auto i = rotation_index_; i > 0; --i) {
-    std::string rotated_name = file_names_[i];
-    std::string unrotated_name = file_names_[i - 1];
-    if (Filesystem::IsFile(unrotated_name)) {
-      if (!Filesystem::MoveFile(unrotated_name, rotated_name)) {
-        std::cerr << "Failed to move: " << unrotated_name << " to "
-                  << rotated_name << std::endl;
-      }
-    }
-  }
-  // Create a new file for 0th index.
-  OpenCurrentFile();
-  OnRotation();
-}
-
-std::vector<std::string> FileRotatingStream::GetFilesWithPrefix() const {
-  std::vector<std::string> files;
-  // Iterate over the files in the directory.
-  DirectoryIterator it;
-  Pathname dir_path;
-  dir_path.SetFolder(dir_path_);
-  if (!it.Iterate(dir_path)) {
-    return files;
-  }
-  do {
-    std::string current_name = it.Name();
-    if (current_name.size() && !it.IsDirectory() &&
-        current_name.compare(0, file_prefix_.size(), file_prefix_) == 0) {
-      Pathname path(dir_path_, current_name);
-      files.push_back(path.pathname());
-    }
-  } while (it.Next());
-  return files;
-}
-
-std::string FileRotatingStream::GetFilePath(size_t index,
-                                            size_t num_files) const {
-  RTC_DCHECK_LT(index, num_files);
-  std::ostringstream file_name;
-  // The format will be "_%<num_digits>zu". We want to zero pad the index so
-  // that it will sort nicely.
-  size_t max_digits = ((num_files - 1) / 10) + 1;
-  size_t num_digits = (index / 10) + 1;
-  RTC_DCHECK_LE(num_digits, max_digits);
-  size_t padding = max_digits - num_digits;
-
-  file_name << file_prefix_ << "_";
-  for (size_t i = 0; i < padding; ++i) {
-    file_name << "0";
-  }
-  file_name << index;
-
-  Pathname file_path(dir_path_, file_name.str());
-  return file_path.pathname();
-}
-
-CallSessionFileRotatingStream::CallSessionFileRotatingStream(
-    const std::string& dir_path)
-    : FileRotatingStream(dir_path, kLogPrefix),
-      max_total_log_size_(0),
-      num_rotations_(0) {
-}
-
-CallSessionFileRotatingStream::CallSessionFileRotatingStream(
-    const std::string& dir_path,
-    size_t max_total_log_size)
-    : FileRotatingStream(dir_path,
-                         kLogPrefix,
-                         max_total_log_size / 2,
-                         GetNumRotatingLogFiles(max_total_log_size) + 1),
-      max_total_log_size_(max_total_log_size),
-      num_rotations_(0) {
-  RTC_DCHECK_GE(max_total_log_size, 4);
-}
-
-const char* CallSessionFileRotatingStream::kLogPrefix = "webrtc_log";
-const size_t CallSessionFileRotatingStream::kRotatingLogFileDefaultSize =
-    1024 * 1024;
-
-void CallSessionFileRotatingStream::OnRotation() {
-  ++num_rotations_;
-  if (num_rotations_ == 1) {
-    // On the first rotation adjust the max file size so subsequent files after
-    // the first are smaller.
-    SetMaxFileSize(GetRotatingLogSize(max_total_log_size_));
-  } else if (num_rotations_ == (GetNumFiles() - 1)) {
-    // On the next rotation the very first file is going to be deleted. Change
-    // the rotation index so this doesn't happen.
-    SetRotationIndex(GetRotationIndex() - 1);
-  }
-}
-
-size_t CallSessionFileRotatingStream::GetRotatingLogSize(
-    size_t max_total_log_size) {
-  size_t num_rotating_log_files = GetNumRotatingLogFiles(max_total_log_size);
-  size_t rotating_log_size = num_rotating_log_files > 2
-                                 ? kRotatingLogFileDefaultSize
-                                 : max_total_log_size / 4;
-  return rotating_log_size;
-}
-
-size_t CallSessionFileRotatingStream::GetNumRotatingLogFiles(
-    size_t max_total_log_size) {
-  // At minimum have two rotating files. Otherwise split the available log size
-  // evenly across 1MB files.
-  return std::max((size_t)2,
-                  (max_total_log_size / 2) / kRotatingLogFileDefaultSize);
-}
-
-}  // namespace rtc