/usr/include/kj/std/iostream.h is in libcapnp-dev 0.5.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | // Copyright (c) 2014 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
/*
 * Compatibility layer for stdlib iostream
 */
#ifndef KJ_STD_IOSTREAM_H_
#define KJ_STD_IOSTREAM_H_
#if defined(__GNUC__) && !KJ_HEADER_WARNINGS
#pragma GCC system_header
#endif
#include <iostream>
#include "../io.h"
namespace kj {
namespace std {
class StdOutputStream: public kj::OutputStream {
public:
  explicit StdOutputStream(::std::ostream& stream) : stream_(stream) {}
  ~StdOutputStream() noexcept(false) {}
  virtual void write(const void* src, size_t size) override {
    // Always writes the full size.
    stream_.write((char*)src, size);
  }
  virtual void write(ArrayPtr<const ArrayPtr<const byte>> pieces) override {
    // Equivalent to write()ing each byte array in sequence, which is what the
    // default implementation does. Override if you can do something better,
    // e.g. use writev() to do the write in a single syscall.
    for (auto piece : pieces) {
      write(piece.begin(), piece.size());
    }
  }
private:
  ::std::ostream& stream_;
};
class StdInputStream: public kj::InputStream {
public:
  explicit StdInputStream(::std::istream& stream) : stream_(stream) {}
  ~StdInputStream() noexcept(false) {}
  virtual size_t tryRead(
      void* buffer, size_t minBytes, size_t maxBytes) override {
    // Like read(), but may return fewer than minBytes on EOF.
    stream_.read((char*)buffer, maxBytes);
    return stream_.gcount();
  }
private:
  ::std::istream& stream_;
};
}  // namespace std
}  // namespace kj
#endif  // KJ_STD_IOSTREAM_H_
 |