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    <p>Some problems that I see:</p> <p>This will work great if it is only used for an input container that stores 8 bit types - e.g. char or unsigned char. For example, the following code will fail if used with a 32 bit type whose value after the right shift is greater than 15 - recommend that you always use a mask to ensure that lookup index is always within range.</p> <pre><code>*outit++ = hexDigits[*it &gt;&gt; 4]; </code></pre> <p>What is the expected behavior if you pass in a container containing unsigned longs - for this to be a generic class it should probably be able to handle the conversion of 32 bit numbers to hext strings also.</p> <p>This only works when the input is a container - what if I just want to convert a single byte? A suggestion here is to refactor the code into a core function that can covert a single byte (hex=>ascii and ascii=>hex) and then provide additional functions to use this core function for coverting containers of bytes etc.</p> <p>In asciihex(), bad things will happen if the size of the input container is not divisible by 2. The use of:</p> <pre><code>it != in.end(); it += 2 </code></pre> <p>is dangerous since if the container size is not divisible by 2 then the increment by two will advance the iterator past the end of the container and the comparison against end() will never work. This is somewhat protected against via the assert call but assert can be compiled out (e.g. it is often compiled out in release builds) so it would be much better to make this an if statement.</p>
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    1. POConverting binary data to printable hex
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    1. USStephen Doyle
    1. USStephen Doyle
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    1. COThe assert on the second line of asciihex() checks that the input size is divisible by 2, so +=2 is safe in this case - I agree though that it at least looks dangerous, and I think I'd code it a bit differently myself.
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      1. USjrb
    2. CO@jrbushell, assert will only be included in debug versions. It has no effect on release code, and is an aid to testing rather than run-time checking
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      1. USShane MacLaughlin
    3. COassert doesn't only check in debug code in our build environment(though you can configure it to do so)
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      1. USPatrick
 

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