Function HexEncode

renderdoc/serialise/codecs/xml_codec.cpp:124–185

}

static void HexEncode(const bytebuf &in, rdcstr &out)
{
  const size_t bytesPerLine = 32;
  const size_t bytesPerGroup = 4;

  const char digit[] = "0123456789ABCDEF";
  // Reserve rough required size:
  // - 3 characters per byte (two for hex, 1 for ascii),
  // - 4 characters per line (3x space between hex and ascii, newline)
  // - 1 character per group (space)
  // - 2 characters for leading/trailing newline
  out.reserve(in.size() * 3 + (in.size() / bytesPerLine) * 4 + (in.size() / bytesPerGroup) + 2);

  // leading newline
  out = "\n";

  // accumulate ascii representation for each line
  rdcstr ascii;

  size_t i = 0;
  for(byte c : in)
  {
    out.push_back(digit[(c & 0xf0) >> 4]);
    out.push_back(digit[(c & 0x0f) >> 0]);

    if(IsXMLPrintable((char)c))
      ascii.push_back((char)c);
    else
      ascii.push_back('.');

    i++;
    if((i % bytesPerLine) == 0)
    {
      out += StringFormat::Fmt("   %s\n", ascii.c_str());
      ascii.clear();
    }
    else if((i % bytesPerGroup) == 0)
    {
      out.push_back(' ');
    }
  }

  // add remaining part of a line, if we didn't end by completing one
  size_t lastLineLength = i % bytesPerLine;
  if(lastLineLength > 0)
  {
    for(i = lastLineLength; i < bytesPerLine; i++)
    {
      // print 2 spaces where there would be characters
      out.push_back(' ');
      out.push_back(' ');

      // don't print the group space the first time, since it was already printed, but after that
      // print the group space
      if((i % bytesPerGroup) == 0 && i > lastLineLength)
        out.push_back(' ');
    }