file.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FILESYSTEM_FILE_H_
#define FILESYSTEM_FILE_H_
 
#include <cstdint>
#include <string>
#include <vector>
 
#include "tonic/filesystem/filesystem/eintr_wrapper.h"
#include "tonic/filesystem/filesystem/portable_unistd.h"
 
namespace filesystem {
 
class Descriptor {
 public:
  using Handle = int;
 
  Descriptor(Handle handle) : handle_(handle) {}
 
  ~Descriptor() {
    if (is_valid()) {
      IGNORE_EINTR(::close(handle_));
    }
  }
 
  bool is_valid() { return handle_ >= 0; }
 
  Handle get() { return handle_; }
 
 private:
  Handle handle_ = -1;
 
  Descriptor(Descriptor&) = delete;
 
  void operator=(const Descriptor&) = delete;
};
 
// Reads the contents of the file at the given path or file descriptor and
// stores the data in result. Returns true if the file was read successfully,
// otherwise returns false. If this function returns false, |result| will be
// the empty string.
bool ReadFileToString(const std::string& path, std::string* result);
bool ReadFileDescriptorToString(int fd, std::string* result);
 
// Reads the contents of the file at the given path and if successful, returns
// pair of read allocated bytes with data and size of the data if successful.
// pair of <nullptr, -1> if read failed.
std::pair<uint8_t*, intptr_t> ReadFileToBytes(const std::string& path);
std::pair<uint8_t*, intptr_t> ReadFileDescriptorToBytes(int fd);
 
}  // namespace filesystem
 
#endif  // FILESYSTEM_FILE_H_