62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#pragma once
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#include <cstdint>
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#include <stdexcept>
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struct no_more_input : std::exception
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{};
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struct fuzzer_input
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{
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const std::uint8_t* data_;
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std::size_t size_;
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const std::uint8_t* next(std::size_t size)
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{
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if (size_ < size)
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throw no_more_input{};
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auto r = data_;
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data_ += size;
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size_ -= size;
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return r;
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}
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const std::uint8_t* next(std::size_t size, std::size_t align)
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{
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auto rem = size % align;
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if (rem)
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next(align - rem);
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return next(size);
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}
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template <typename Fn>
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int run(Fn step)
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{
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try {
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while (step(*this))
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continue;
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} catch (const no_more_input&) {};
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return 0;
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}
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};
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template <typename T>
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const T& read(fuzzer_input& fz)
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{
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return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
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}
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template <typename T, typename Cond>
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T read(fuzzer_input& fz, Cond cond)
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{
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auto x = read<T>(fz);
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return cond(x) ? x : read<T>(fz, cond);
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}
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