util/generic/fuzz/vector/main.cpp


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#include <util/generic/vector.h> 
#include <util/stream/mem.h> 
 
template <class T> 
static inline T Read(IInputStream& in) {
    T t; 
 
    in.LoadOrFail(&t, sizeof(t)); 
 
    return t; 
} 
 
extern "C" int LLVMFuzzerTestOneInput(const ui8* data, size_t size) { 
    TMemoryInput mi(data, size); 
 
    try { 
        TVector<ui16> v;
 
        while (mi.Avail()) { 
            char cmd = Read<char>(mi); 
 
            switch (cmd % 2) { 
                case 0: { 
                    const size_t cnt = 1 + Read<ui8>(mi) % 16; 
 
                    for (size_t i = 0; i < cnt; ++i) { 
                        v.push_back(i); 
                    } 
 
                    break; 
                } 
 
                case 1: { 
                    if (v) { 
                        v.pop_back(); 
                    } 
 
                    break; 
                } 
            } 
        } 
    } catch (...) { 
        // ¯\_(ツ)_/¯ 
    } 
 
    return 0; // Non-zero return values are reserved for future use. 
}