mirror of
https://github.com/vtil-project/VTIL-Core
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95 lines
No EOL
3.7 KiB
C++
95 lines
No EOL
3.7 KiB
C++
// Copyright (c) 2020 Can Boluk and contributors of the VTIL Project
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the name of VTIL Project nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include <iterator>
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#include <limits>
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#include "type_helpers.hpp"
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namespace vtil
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{
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template<Integral T = size_t>
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struct numeric_range
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{
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// Declare the iterator type.
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//
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struct iterator
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{
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// Generic iterator typedefs.
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//
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using iterator_category = std::bidirectional_iterator_tag;
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using difference_type = std::make_signed_t<T>;
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using value_type = T;
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using reference = T&;
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using pointer = void*;
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value_type at;
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// Support bidirectional iteration.
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//
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constexpr iterator& operator++() { at++; return *this; }
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constexpr iterator& operator--() { at--; return *this; }
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constexpr iterator operator++( int ) { auto s = *this; operator++(); return s; }
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constexpr iterator operator--( int ) { auto s = *this; operator--(); return s; }
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// Equality check against another iterator.
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//
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constexpr bool operator==( const iterator& other ) const { return at == other.at; }
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constexpr bool operator!=( const iterator& other ) const { return at != other.at; }
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// Redirect dereferencing to container.
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//
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constexpr value_type operator*() const { return at; }
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};
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using const_iterator = iterator;
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// Beginning and the end of the range.
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//
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T min_value;
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T max_value;
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constexpr numeric_range( T min_value = std::numeric_limits<T>::min(),
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T max_value = std::numeric_limits<T>::max() )
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: min_value( min_value ), max_value( max_value ) {}
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// Generic container helpers.
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//
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constexpr size_t size() const { return max_value - min_value; }
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constexpr iterator begin() const { return { min_value }; }
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constexpr iterator end() const { return { max_value }; }
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constexpr T operator[]( size_t n ) const { return min_value + n; }
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};
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template<Integral T> numeric_range( T a ) -> numeric_range<T>;
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template<Integral T> numeric_range( T a, T b ) -> numeric_range<T>;
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// Simple range creation wrapper.
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//
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static constexpr numeric_range<> iindices = {};
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template<typename T>
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static numeric_range<T> iiota( T x ) { return { x }; }
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}; |