// Copyright (c) 2018 The Khronos Group Inc.

// Copyright (c) 2018 Valve Corporation

// Copyright (c) 2018 LunarG 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 "source/opt/composite.h"

#include <vector>

#include "source/opt/ir_context.h"

#include "source/opt/iterator.h"

#include "spirv/1.2/GLSL.std.450.h"

namespace spvtools {

namespace opt {

bool ExtInsMatch(const std::vector<uint32_t>& extIndices,

                 const Instruction* insInst, const uint32_t extOffset) {

  uint32_t numIndices = static_cast<uint32_t>(extIndices.size()) - extOffset;

  if (numIndices != insInst->NumInOperands() - 2) return false;

  for (uint32_t i = 0; i < numIndices; ++i)

    if (extIndices[i + extOffset] != insInst->GetSingleWordInOperand(i + 2))

      return false;

  return true;

}

bool ExtInsConflict(const std::vector<uint32_t>& extIndices,

                    const Instruction* insInst, const uint32_t extOffset) {

  if (extIndices.size() - extOffset == insInst->NumInOperands() - 2)

    return false;

  uint32_t extNumIndices = static_cast<uint32_t>(extIndices.size()) - extOffset;

  uint32_t insNumIndices = insInst->NumInOperands() - 2;

  uint32_t numIndices = std::min(extNumIndices, insNumIndices);

  for (uint32_t i = 0; i < numIndices; ++i)

    if (extIndices[i + extOffset] != insInst->GetSingleWordInOperand(i + 2))

      return false;

  return true;

}

}  // namespace opt

}  // namespace spvtools