inline void insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
enum { chunk_size = 8 };
charT fill_chars[chunk_size];
std::fill_n(fill_chars, static_cast< std::size_t >(chunk_size), os.fill());
for (; n >= chunk_size && os.good(); n -= chunk_size)
os.write(fill_chars, static_cast< std::size_t >(chunk_size));
if (n > 0 && os.good())
os.write(fill_chars, n);
}
inline void hex_dump(const void* aData, std::size_t aLength, std::basic_ostream<Elem, Traits>& aStream, std::size_t aWidth = 16)
{
const char* const start = static_cast<const char*>(aData);
const char* const end = start + aLength;
const char* line = start;
while (line != end)
{
aStream.width(4);
aStream.fill('0');
aStream << std::hex << line - start << " : ";
std::size_t lineLength = std::min(aWidth, static_cast<std::size_t>(end - line));
for (std::size_t pass = 1; pass <= 2; ++pass)
{
for (const char* next = line; next != end && next != line + aWidth; ++next)
{
char ch = *next;
switch(pass)
{
case 1:
aStream << (ch < 32 ? '.' : ch);
break;
case 2:
if (next != line)
aStream << " ";
aStream.width(2);
aStream.fill('0');
aStream << std::hex << std::uppercase << static_cast<int>(static_cast<unsigned char>(ch));
break;
}
}
if (pass == 1 && lineLength != aWidth)
aStream << std::string(aWidth - lineLength, ' ');
aStream << " ";
}
aStream << std::endl;
line = line + lineLength;
}
}