Method read

src/test/fuzz/util.cpp:292–309

}

ssize_t FuzzedFileProvider::read(void* cookie, char* buf, size_t size)
{
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    if (buf == nullptr || size == 0 || fuzzed_file->m_fuzzed_data_provider.ConsumeBool()) {
        return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1;
    }
    const std::vector<uint8_t> random_bytes = fuzzed_file->m_fuzzed_data_provider.ConsumeBytes<uint8_t>(size);
    if (random_bytes.empty()) {
        return 0;
    }
    std::memcpy(buf, random_bytes.data(), random_bytes.size());
    if (AdditionOverflow(fuzzed_file->m_offset, (int64_t)random_bytes.size())) {
        return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1;
    }
    fuzzed_file->m_offset += random_bytes.size();
    return random_bytes.size();
}

ssize_t FuzzedFileProvider::write(void* cookie, const char* buf, size_t size)
{