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https://github.com/bitcoin/bitcoin.git
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935acdcc79
- Constructors of uint256 to utilize Span instead of requiring a std::vector
- converts m_data into a std::array
- Prefers using `WIDTH` instead of `sizeof(m_data)`
- make all the things constexpr
- replace C style functions with c++ equivalents
- memset -> std::fill
- memcpy -> std::copy
Note: In practice, implementations of std::copy avoid multiple assignments and use bulk copy functions such as std::memmove if the value type is TriviallyCopyable and the iterator types satisfy LegacyContiguousIterator. (https://en.cppreference.com/w/cpp/algorithm/copy)
- memcmp -> std::memcmp
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <uint256.h>
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#include <util/strencodings.h>
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template <unsigned int BITS>
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std::string base_blob<BITS>::GetHex() const
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{
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uint8_t m_data_rev[WIDTH];
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for (int i = 0; i < WIDTH; ++i) {
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m_data_rev[i] = m_data[WIDTH - 1 - i];
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}
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return HexStr(m_data_rev);
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}
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template <unsigned int BITS>
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void base_blob<BITS>::SetHex(const char* psz)
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{
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std::fill(m_data.begin(), m_data.end(), 0);
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// skip leading spaces
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while (IsSpace(*psz))
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psz++;
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// skip 0x
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if (psz[0] == '0' && ToLower(psz[1]) == 'x')
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psz += 2;
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// hex string to uint
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size_t digits = 0;
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while (::HexDigit(psz[digits]) != -1)
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digits++;
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unsigned char* p1 = m_data.data();
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unsigned char* pend = p1 + WIDTH;
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while (digits > 0 && p1 < pend) {
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*p1 = ::HexDigit(psz[--digits]);
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if (digits > 0) {
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*p1 |= ((unsigned char)::HexDigit(psz[--digits]) << 4);
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p1++;
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}
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}
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}
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template <unsigned int BITS>
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void base_blob<BITS>::SetHex(const std::string& str)
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{
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SetHex(str.c_str());
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}
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template <unsigned int BITS>
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std::string base_blob<BITS>::ToString() const
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{
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return (GetHex());
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}
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// Explicit instantiations for base_blob<160>
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template std::string base_blob<160>::GetHex() const;
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template std::string base_blob<160>::ToString() const;
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template void base_blob<160>::SetHex(const char*);
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template void base_blob<160>::SetHex(const std::string&);
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// Explicit instantiations for base_blob<256>
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template std::string base_blob<256>::GetHex() const;
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template std::string base_blob<256>::ToString() const;
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template void base_blob<256>::SetHex(const char*);
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template void base_blob<256>::SetHex(const std::string&);
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const uint256 uint256::ZERO(0);
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const uint256 uint256::ONE(1);
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