Method seek

src/test/fuzz/util.cpp:582–608

}

int FuzzedFileProvider::seek(void* cookie, int64_t* offset, int whence)
{
    assert(whence == SEEK_SET || whence == SEEK_CUR || whence == SEEK_END);
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    int64_t new_offset = 0;
    if (whence == SEEK_SET) {
        new_offset = *offset;
    } else if (whence == SEEK_CUR) {
        if (AdditionOverflow(fuzzed_file->m_offset, *offset)) {
            return -1;
        }
        new_offset = fuzzed_file->m_offset + *offset;
    } else if (whence == SEEK_END) {
        const int64_t n = fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 4096);
        if (AdditionOverflow(n, *offset)) {
            return -1;
        }
        new_offset = n + *offset;
    }
    if (new_offset < 0) {
        return -1;
    }
    fuzzed_file->m_offset = new_offset;
    *offset = new_offset;
    return fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int>(-1, 0);
}

int FuzzedFileProvider::close(void* cookie)
{