2a:I[49813,["/_next/static/chunks/3z--bwudlglfp.js","/_next/static/chunks/2u04xn-9yg2co.js","/_next/static/chunks/1b5-8ftwqgmtb.js","/_next/static/chunks/3nqo6bdos11l6.js","/_next/static/chunks/0fz0mlrjifmq7.js","/_next/static/chunks/034_kq3j28m99.js","/_next/static/chunks/29v1ttach42xh.js","/_next/static/chunks/3meo7law-jljp.js","/_next/static/chunks/1hplpmn3-d0tx.js"],"CodeWorkspace"] 2b:T1cba,/** * Copyright (c) 2011-2026 libbitcoin developers * * This file is part of libbitcoin. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . */ #ifndef LIBBITCOIN_SYSTEM_DATA_ARRAY_CAST_IPP #define LIBBITCOIN_SYSTEM_DATA_ARRAY_CAST_IPP #include #include namespace libbitcoin { namespace system { // Sequence generation. // ---------------------------------------------------------------------------- // Suppress bogus warnings to use constexpr when function is consteval. BC_PUSH_WARNING(USE_CONSTEXPR_FOR_FUNCTION) // Helper to extract Index parameter pack from std::make_index_sequence. template consteval auto to_array(std::index_sequence) NOEXCEPT { return std_array{ { Index... } }; } template consteval std_array to_sequence() NOEXCEPT { return to_array(std::make_index_sequence{}); } BC_POP_WARNING() // Array casting helpers. // ---------------------------------------------------------------------------- template constexpr bool is_portional(size_t to_count, size_t from_count) NOEXCEPT { // Guards against the protion being greater than available. return !is_multiply_overflow(to_count, size_of()) && !is_multiply_overflow(from_count, size_of()) && (to_count * size_of() <= from_count * size_of()); } template constexpr bool is_proportional(size_t from_count) NOEXCEPT { return !is_multiply_overflow(from_count, size_of()) && is_multiple(from_count * size_of(), size_of()); } // Cast array(T1) to same-sized array(T2). // ---------------------------------------------------------------------------- template HOST_DEVICE inline std_array>& array_cast(std_array& values) NOEXCEPT { using to = std_array>; return *pointer_cast(values.data()); } template HOST_DEVICE inline const std_array>& array_cast(const std_array& values) NOEXCEPT { using to = std_array>; return *pointer_cast(values.data()); } // Avoids cast of rvalue to reference, which would dangle. template HOST_DEVICE inline std_array> array_cast(std_array&& values) NOEXCEPT { return array_cast(unmove(values)); } // Cast array(T1) to not-greater-sized array(T2). // ---------------------------------------------------------------------------- template , if_portional> HOST_DEVICE inline std_array& array_cast(std_array& values) NOEXCEPT { using to = std_array; return *pointer_cast(std::next(values.data(), FromOffset)); } template , if_portional> HOST_DEVICE inline const std_array& array_cast(const std_array& values) NOEXCEPT { using to = std_array; return *pointer_cast(std::next(values.data(), FromOffset)); } // Avoids cast of rvalue to reference, which would dangle. // Cannot offset into move assignment as the whole instance must be moved. template > HOST_DEVICE inline std_array array_cast(std_array&& values) NOEXCEPT { return array_cast(unmove(values)); } // Cast Integral1* to array(Integral2). // ---------------------------------------------------------------------------- template , if_integral_integer> HOST_DEVICE inline std_array& unsafe_array_cast(From* bytes) NOEXCEPT { return *pointer_cast>(bytes); } template , if_integral_integer> HOST_DEVICE inline const std_array& unsafe_array_cast(const From* bytes) NOEXCEPT { return *pointer_cast>(bytes); } // Cast Integral1* to array(array(Integral2), Size). // ---------------------------------------------------------------------------- template , if_integral_array> HOST_DEVICE inline std_array& unsafe_array_cast(From* bytes) NOEXCEPT { return *pointer_cast>(bytes); } template , if_integral_array> HOST_DEVICE inline const std_array& unsafe_array_cast(const From* bytes) NOEXCEPT { return *pointer_cast>(bytes); } // Cast Integral1* to a vector(array(Integral)&, count). // ---------------------------------------------------------------------------- template , if_integral_array> inline std_vector> unsafe_vector_cast(From* bytes, size_t count) NOEXCEPT { using inner_type = array_element; constexpr auto inner_count = array_count; std_vector> out{}; out.reserve(count); for (size_t element = 0; element < count; ++element) { out.emplace_back(unsafe_array_cast(bytes)); std::advance(bytes, size_of()); } return out; } template , if_integral_array> inline std_vector> unsafe_vector_cast(const From* bytes, size_t count) NOEXCEPT { using inner_type = array_element; constexpr auto inner_count = array_count; std_vector> out{}; out.reserve(count); for (size_t element = 0; element < count; ++element) { out.emplace_back(unsafe_array_cast(bytes)); std::advance(bytes, size_of()); } 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