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63 lines
1.9 KiB
C++
63 lines
1.9 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 std::string_view str)
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{
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std::fill(m_data.begin(), m_data.end(), 0);
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const auto trimmed = util::RemovePrefixView(util::TrimStringView(str), "0x");
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// Note: if we are passed a greater number of digits than would fit as bytes
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// in m_data, we will be discarding the leftmost ones.
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// str="12bc" in a WIDTH=1 m_data => m_data[] == "\0xbc", not "0x12".
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size_t digits = 0;
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for (const char c : trimmed) {
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if (::HexDigit(c) == -1) break;
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++digits;
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}
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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(trimmed[--digits]);
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if (digits > 0) {
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*p1 |= ((unsigned char)::HexDigit(trimmed[--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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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(std::string_view);
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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(std::string_view);
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const uint256 uint256::ZERO(0);
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const uint256 uint256::ONE(1);
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