mirror of
https://github.com/nlohmann/json
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125 lines
3.4 KiB
C++
125 lines
3.4 KiB
C++
//===- FuzzerDictionary.h - Internal header for the Fuzzer ------*- C++ -* ===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// fuzzer::Dictionary
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FUZZER_DICTIONARY_H
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#define LLVM_FUZZER_DICTIONARY_H
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#include "FuzzerDefs.h"
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#include "FuzzerIO.h"
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#include "FuzzerUtil.h"
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#include <algorithm>
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#include <limits>
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namespace fuzzer {
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// A simple POD sized array of bytes.
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template <size_t kMaxSize> class FixedWord {
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public:
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FixedWord() {}
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FixedWord(const uint8_t *B, uint8_t S) { Set(B, S); }
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void Set(const uint8_t *B, uint8_t S) {
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assert(S <= kMaxSize);
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memcpy(Data, B, S);
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Size = S;
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}
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bool operator==(const FixedWord<kMaxSize> &w) const {
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return Size == w.Size && 0 == memcmp(Data, w.Data, Size);
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}
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bool operator<(const FixedWord<kMaxSize> &w) const {
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if (Size != w.Size)
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return Size < w.Size;
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return memcmp(Data, w.Data, Size) < 0;
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}
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static size_t GetMaxSize() { return kMaxSize; }
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const uint8_t *data() const { return Data; }
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uint8_t size() const { return Size; }
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private:
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uint8_t Size = 0;
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uint8_t Data[kMaxSize];
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};
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typedef FixedWord<27> Word; // 28 bytes.
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class DictionaryEntry {
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public:
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DictionaryEntry() {}
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DictionaryEntry(Word W) : W(W) {}
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DictionaryEntry(Word W, size_t PositionHint) : W(W), PositionHint(PositionHint) {}
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const Word &GetW() const { return W; }
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bool HasPositionHint() const { return PositionHint != std::numeric_limits<size_t>::max(); }
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size_t GetPositionHint() const {
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assert(HasPositionHint());
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return PositionHint;
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}
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void IncUseCount() { UseCount++; }
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void IncSuccessCount() { SuccessCount++; }
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size_t GetUseCount() const { return UseCount; }
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size_t GetSuccessCount() const {return SuccessCount; }
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void Print(const char *PrintAfter = "\n") {
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PrintASCII(W.data(), W.size());
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if (HasPositionHint())
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Printf("@%zd", GetPositionHint());
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Printf("%s", PrintAfter);
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}
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private:
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Word W;
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size_t PositionHint = std::numeric_limits<size_t>::max();
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size_t UseCount = 0;
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size_t SuccessCount = 0;
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};
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class Dictionary {
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public:
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static const size_t kMaxDictSize = 1 << 14;
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bool ContainsWord(const Word &W) const {
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return std::any_of(begin(), end(), [&](const DictionaryEntry &DE) {
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return DE.GetW() == W;
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});
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}
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const DictionaryEntry *begin() const { return &DE[0]; }
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const DictionaryEntry *end() const { return begin() + Size; }
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DictionaryEntry & operator[] (size_t Idx) {
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assert(Idx < Size);
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return DE[Idx];
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}
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void push_back(DictionaryEntry DE) {
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if (Size < kMaxDictSize)
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this->DE[Size++] = DE;
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}
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void clear() { Size = 0; }
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bool empty() const { return Size == 0; }
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size_t size() const { return Size; }
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private:
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DictionaryEntry DE[kMaxDictSize];
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size_t Size = 0;
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};
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// Parses one dictionary entry.
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// If successfull, write the enty to Unit and returns true,
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// otherwise returns false.
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bool ParseOneDictionaryEntry(const std::string &Str, Unit *U);
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// Parses the dictionary file, fills Units, returns true iff all lines
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// were parsed succesfully.
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bool ParseDictionaryFile(const std::string &Text, std::vector<Unit> *Units);
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} // namespace fuzzer
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#endif // LLVM_FUZZER_DICTIONARY_H
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