src/base/IoManip.cc

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "base/IoManip.h"
  11 #include "debug/Stream.h"
  12
  13 #include <algorithm>
  14
  15 void
  16 PrintHex(std::ostream &os, const char * const data, const size_t n)
  17 {
  18     if (!n)
  19         return;
  20     assert(data);
  21
  22     const auto savedFill = os.fill('0');
  23     const auto savedFlags = os.flags(); // std::ios_base::fmtflags
  24     os << std::hex;
  25     std::for_each(data, data + n,
  26     [&os](const char &c) { os << std::setw(2) << static_cast<uint8_t>(c); });
  27     os.flags(savedFlags);
  28     os.fill(savedFill);
  29 }
  30