// Copyright (c) 2019 Google Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <cstdint>

#include <cstring>  // memcpy

#include <vector>

#include "source/spirv_target_env.h"

#include "spirv-tools/libspirv.hpp"

#include "test/fuzzers/random_generator.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

  if (size < 4) {

    // There are not enough bytes to constitute a binary that can be

    // disassembled.

    return 0;

  }

  spvtools::fuzzers::RandomGenerator random_gen(data, size);

  const spv_context context = spvContextCreate(random_gen.GetTargetEnv());

  if (context == nullptr) {

    return 0;

  }

  std::vector<uint32_t> input;

  input.resize(size >> 2);

  size_t count = 0;

  for (size_t i = 0; (i + 3) < size; i += 4) {

    input[count++] = data[i] | (data[i + 1] << 8) | (data[i + 2] << 16) |

                     (data[i + 3]) << 24;

  }

  std::vector<char> input_str;

  size_t char_count = input.size() * sizeof(uint32_t) / sizeof(char);

  input_str.resize(char_count);

  memcpy(input_str.data(), input.data(), input.size() * sizeof(uint32_t));

  spv_text text = nullptr;

  spv_diagnostic diagnostic = nullptr;

  for (uint32_t options = SPV_BINARY_TO_TEXT_OPTION_NONE;

       options <

       (SPV_BINARY_TO_TEXT_OPTION_PRINT | SPV_BINARY_TO_TEXT_OPTION_COLOR |

        SPV_BINARY_TO_TEXT_OPTION_INDENT |

        SPV_BINARY_TO_TEXT_OPTION_SHOW_BYTE_OFFSET |

        SPV_BINARY_TO_TEXT_OPTION_NO_HEADER |

        SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES);

       options++) {

    spvBinaryToText(context, input.data(), input.size(), options, &text,

                    &diagnostic);

    if (diagnostic) {

      spvDiagnosticDestroy(diagnostic);

      diagnostic = nullptr;

    }

    if (text) {

      spvTextDestroy(text);

      text = nullptr;

    }

  }

  spvContextDestroy(context);

  return 0;

}