host.h

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#pragma once
 
#include <string>
 
namespace net
{
    inline void canonicalize_host(std::string& host) noexcept
    {
        for (char& c : host)
        {
            if ('A' <= c && c <= 'Z')
                c = static_cast<char>(c - 'A' + 'a');
        }
    }
}