52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
#include <string>
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#include <sstream>
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#include <cmath>
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#include <algorithm>
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#include "gif_fuzz_proto.pb.h"
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namespace gifProtoFuzzer
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{
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class ProtoConverter
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{
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public:
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std::string gifProtoToString(GifProto const &proto);
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private:
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template <class T>
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void visit(google::protobuf::RepeatedPtrField<T> const &_repeated_field);
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void visit(const GifProto &);
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void visit(const Header &);
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void visit(const LogicalScreenDescriptor &);
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void visit(const GlobalColorTable &);
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void visit(const ImageChunk &);
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void visit(const BasicChunk &);
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void visit(const ImageData &);
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void visit(const SubBlock &);
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void visit(const ImageDescriptor &);
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void visit(const LocalColorTable &);
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void visit(const GraphicControlExtension &);
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void visit(const PlainTextExtension &);
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void visit(const ApplicationExtension &);
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void visit(const CommentExtension &);
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void visit(const Trailer &);
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// Utility functions
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void writeByte(uint8_t x);
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void writeWord(uint16_t x);
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void writeInt(uint32_t x);
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void writeLong(uint64_t x);
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static uint16_t extractWordFromUInt32(uint32_t a);
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static uint8_t extractByteFromUInt32(uint32_t a);
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static uint32_t tableExpToTableSize(uint32_t tableExp);
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std::stringstream m_output;
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bool m_hasGCT = false;
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bool m_hasLCT = false;
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uint8_t m_globalColorExp = 0;
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uint8_t m_localColorExp = 0;
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static constexpr unsigned char m_sig[] = {0x47, 0x49, 0x46};
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static constexpr unsigned char m_ver89a[] = {0x38, 0x39, 0x61};
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static constexpr unsigned char m_ver87a[] = {0x38, 0x37, 0x61};
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};
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} // namespace gifProtoFuzzer
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