hexdump.hpp

#ifndef HEXDUMP_H
#define HEXDUMP_H

#include <iostream>

namespace hex
{
	static bool printable(char ch) {
		if (ch >= 32 && ch <= 126) {
			return true;
		}
		return false;
	}

	template<class Elem, class Traits>
	inline void 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 << (printable(ch) ? ch : '.');
						break;
					case 2:
						if (next != line)
							aStream << " ";
						aStream.width(2);
						aStream.fill('0');
						aStream << std::hex << 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;
		}
	}
}



#endif