hexdump.hpp

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// hex_dump.hpp v1.0
/*
 *  Copyright (c) 2007 Leigh Johnston.
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     * Neither the name of Leigh Johnston nor the names of any
 *       other contributors to this software may be used to endorse or
 *       promote products derived from this software without specific prior
 *       written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#pragma once
 
#include <neolib/neolib.hpp>
#include <ostream>
#include <string>
 
namespace neolib
{
    template<class Elem, class Traits>
    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;
        }
    }
}