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1ac9694dbc
Problem: - There are several specific overloads with some custom code that can be easily replaced using Boost.Hex. Solution: - Introduce `strHex(itr, itr)` to return a string given a begin and end iterator. - Remove `strHex(itr, size)` in favor of the `strHex(T)` where T is something that has a `begin()` member function. This allows us to remove the strHex overloads for `std::string`, Blob, and Slice.
100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2011 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file license.txt or http://www.opensource.org/licenses/mit-license.php.
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#ifndef RIPPLE_BASICS_STRHEX_H_INCLUDED
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#define RIPPLE_BASICS_STRHEX_H_INCLUDED
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#include <cassert>
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#include <string>
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#include <boost/algorithm/hex.hpp>
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#include <boost/endian/conversion.hpp>
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namespace ripple {
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/** Converts an integer to the corresponding hex digit
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@param iDigit 0-15 inclusive
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@return a character from '0'-'9' or 'A'-'F'.
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*/
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inline
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char
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charHex (unsigned int digit)
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{
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static
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char const xtab[] = "0123456789ABCDEF";
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assert (digit < 16);
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return xtab[digit];
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}
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/** @{ */
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/** Converts a hex digit to the corresponding integer
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@param cDigit one of '0'-'9', 'A'-'F' or 'a'-'f'
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@return an integer from 0 to 15 on success; -1 on failure.
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*/
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int
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charUnHex (unsigned char c);
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inline
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int
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charUnHex (char c)
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{
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return charUnHex (static_cast<unsigned char>(c));
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}
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/** @} */
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template <class FwdIt>
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std::string
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strHex(FwdIt begin, FwdIt end)
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{
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static_assert(
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std::is_convertible<
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typename std::iterator_traits<FwdIt>::iterator_category,
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std::forward_iterator_tag>::value,
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"FwdIt must be a forward iterator");
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std::string result;
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result.reserve(2 * std::distance(begin, end));
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boost::algorithm::hex(begin, end, std::back_inserter(result));
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return result;
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}
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template <class T, class = decltype(std::declval<T>().begin())>
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std::string strHex(T const& from)
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{
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return strHex(from.begin(), from.end());
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}
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inline std::string strHex (const std::uint64_t uiHost)
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{
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uint64_t uBig = boost::endian::native_to_big (uiHost);
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auto const begin = (unsigned char*) &uBig;
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auto const end = begin + sizeof(uBig);
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return strHex(begin, end);
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}
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}
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#endif
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