// Copyright (c) 2018 Google LLC.

//

// 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/spirv_target_env.h"

#include "source/val/instruction.h"

#include "source/val/validate.h"

#include "source/val/validation_state.h"

namespace spvtools {

namespace val {

namespace {

spv_result_t ValidateMemberName(ValidationState_t& _, const Instruction* inst) {

  const auto type_id = inst->GetOperandAs<uint32_t>(0);

  const auto type = _.FindDef(type_id);

  if (!type || spv::Op::OpTypeStruct != type->opcode()) {

    return _.diag(SPV_ERROR_INVALID_ID, inst)

           << "OpMemberName Type <id> " << _.getIdName(type_id)

           << " is not a struct type.";

  }

  const auto member_id = inst->GetOperandAs<uint32_t>(1);

  const auto member_count = (uint32_t)(type->words().size() - 2);

  if (member_count <= member_id) {

    return _.diag(SPV_ERROR_INVALID_ID, inst)

           << "OpMemberName Member <id> " << _.getIdName(member_id)

           << " index is larger than Type <id> " << _.getIdName(type->id())

           << "s member count.";

  }

  return SPV_SUCCESS;

}

spv_result_t ValidateLine(ValidationState_t& _, const Instruction* inst) {

  const auto file_id = inst->GetOperandAs<uint32_t>(0);

  const auto file = _.FindDef(file_id);

  if (!file || spv::Op::OpString != file->opcode()) {

    return _.diag(SPV_ERROR_INVALID_ID, inst)

           << "OpLine Target <id> " << _.getIdName(file_id)

           << " is not an OpString.";

  }

  return SPV_SUCCESS;

}

}  // namespace

spv_result_t DebugPass(ValidationState_t& _, const Instruction* inst) {

  switch (inst->opcode()) {

    case spv::Op::OpMemberName:

      if (auto error = ValidateMemberName(_, inst)) return error;

      break;

    case spv::Op::OpLine:

      if (auto error = ValidateLine(_, inst)) return error;

      break;

    default:

      break;

  }

  return SPV_SUCCESS;

}

}  // namespace val

}  // namespace spvtools