text: /* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
  
  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 "tensorflow/lite/tools/versioning/runtime_version.h"
  
  #include <cstring>
  
  #include "absl/strings/numbers.h"
  #include "absl/strings/str_split.h"
  #include "tensorflow/lite/minimal_logging.h"
  #include "tensorflow/lite/schema/mutable/schema_generated.h"
  #include "tensorflow/lite/schema/schema_utils.h"
  
  namespace tflite {
  
  bool CompareRuntimeVersion(const std::string& v1, const std::string& v2) {
    const std::vector<std::string> vec1 = absl::StrSplit(v1, '.');
    const std::vector<std::string> vec2 = absl::StrSplit(v2, '.');
    int i = 0;
    while (i < vec1.size() && i < vec2.size()) {
      int v1_val, v2_val;
      if (absl::SimpleAtoi(vec1[i], &v1_val) &&
          absl::SimpleAtoi(vec2[i], &v2_val)) {
        if (v1_val != v2_val) return v1_val < v2_val;
      }
      ++i;
    }
    // If there are remaining items in v2 not being compared, then v1 should
    // precede v2.
    return i < vec2.size();
  }
  
  std::string FindMinimumRuntimeVersionForOp(tflite::BuiltinOperator op_code,
                                             int op_version) {
    // A map from the version key of an op to its minimum runtime version.
    // For example, {{kAveragePool, 1}, "1.5.0"},  means the 1st version of
    // AveragePool requires a minimum TF Lite runtime version '1.5.0`.
    // NOTE: When adding a new op version pair, associate it with the current
    // runtime version defined in tensorflow/core/public/version.h.
    static const std::map<std::pair<BuiltinOperator, int>, std::string>*
        op_version_map =
            new std::map<std::pair<BuiltinOperator, int>, std::string>({
                {{BuiltinOperator_AVERAGE_POOL_2D, 1}, "1.5.0"},
                {{BuiltinOperator_AVERAGE_POOL_2D, 2}, "1.14.0"},
                {{BuiltinOperator_AVERAGE_POOL_2D, 3}, "2.3.0"},
                {{BuiltinOperator_BATCH_MATMUL, 1}, "2.3.0"},
                {{BuiltinOperator_BATCH_MATMUL, 2}, "2.3.0"},
                {{BuiltinOperator_BATCH_MATMUL, 3}, "2.4.0"},
                {{BuiltinOperator_BATCH_MATMUL, 4}, "2.5.0"},
                // The version one of broadcast to op won't be not supported since
                // the version one was rollbacked and the builtin op code number
                // has been changed because of builtin op code shortage problem.
                {{BuiltinOperator_BROADCAST_TO, 2}, "2.5.0"},
                {{BuiltinOperator_BROADCAST_TO, 3}, "2.5.0"},
                {{BuiltinOperator_CONV_2D, 1}, "1.5.0"},
                {{BuiltinOperator_CONV_2D, 2}, "1.14.0"},
                {{BuiltinOperator_CONV_2D, 3}, "1.14.0"},
                {{BuiltinOperator_CONV_2D, 4}, "2.3.0"},
                {{BuiltinOperator_CONV_2D, 5}, "2.4.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 1}, "1.5.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 2}, "1.12.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 3}, "1.14.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 4}, "2.2.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 5}, "2.3.0"},
                {{BuiltinOperator_DEPTHWISE_CONV_2D, 6}, "2.3.0"},
                {{BuiltinOperator_ADD, 1}, "1.5.0"},
                {{BuiltinOperator_ADD, 2}, "1.14.0"},
                {{BuiltinOperator_ADD, 3}, "2.4.0"},
                {{BuiltinOperator_ADD, 4}, "2.6.0"},
                {{BuiltinOperator_ADD_N, 1}, "1.14.0"},
                {{BuiltinOperator_SPACE_TO_BATCH_ND, 1}, "1.6.0"},
                {{BuiltinOperator_SPACE_TO_BATCH_ND, 2}, "1.14.0"},
                {{BuiltinOperator_SPACE_TO_BATCH_ND, 3}, "2.3.0"},
                {{BuiltinOperator_SUB, 1}, "1.6.0"},
                {{BuiltinOperator_SUB, 2}, "1.14.0"},
                {{BuiltinOperator_SUB, 3}, "2.3.0"},
                {{BuiltinOperator_SUB, 4}, "2.4.0"},
                {{BuiltinOperator_SUB, 5}, "2.4.0"},
                {{BuiltinOperator_DENSIFY, 1}, "2.2.0"},
                {{BuiltinOperator_DIV, 1}, "1.6.0"},
                {{BuiltinOperator_DIV, 2}, "2.3.0"},
                {{BuiltinOperator_BATCH_TO_SPACE_ND, 1}, "1.6.0"},
                {{BuiltinOperator_BATCH_TO_SPACE_ND, 2}, "1.14.0"},
                {{BuiltinOperator_BATCH_TO_SPACE_ND, 3}, "2.3.0"},
                {{BuiltinOperator_CAST, 1}, "1.5.0"},
                {{BuiltinOperator_CONCATENATION, 1}, "1.5.0"},
                {{BuiltinOperator_CONCATENATION, 2}, "1.14.0"},
                {{BuiltinOperator_CONCATENATION, 3}, "2.3.0"},
                {{BuiltinOperator_DEPTH_TO_SPACE, 1}, "2.1.0"},
                {{BuiltinOperator_DEPTH_TO_SPACE, 2}, "2.5.0"},
                {{BuiltinOperator_EMBEDDING_LOOKUP, 1}, "1.13.0"},
                {{BuiltinOperator_EMBEDDING_LOOKUP, 2}, "1.14.0"},
                {{BuiltinOperator_EMBEDDING_LOOKUP, 3}, "1.14.0"},
                {{BuiltinOperator_EMBEDDING_LOOKUP_SPARSE, 1}, "1.5.0"},
                {{BuiltinOperator_FAKE_QUANT, 1}, "1.5.0"},
                {{BuiltinOperator_FAKE_QUANT, 2}, "1.10.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 1}, "1.5.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 2}, "1.10.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 3}, "1.14.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 4}, "1.14.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 5}, "2.0.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 6}, "2.1.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 7}, "2.3.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 8}, "2.3.0"},
                {{BuiltinOperator_FULLY_CONNECTED, 9}, "2.3.0"},
                {{BuiltinOperator_GATHER, 1}, "1.6.0"},
                {{BuiltinOperator_GATHER, 2}, "1.14.0"},
                {{BuiltinOperator_GATHER, 3}, "1.15.0"},
                {{BuiltinOperator_GATHER, 4}, "2.4.0"},
                {{BuiltinOperator_GATHER, 5}, "2.5.0"},
                {{BuiltinOperator_GATHER_ND, 1}, "1.14.0"},
                {{BuiltinOperator_GATHER_ND, 2}, "2.3.0"},
                {{BuiltinOperator_GATHER_ND, 3}, "2.5.0"},
                {{BuiltinOperator_HASHTABLE_LOOKUP, 1}, "1.5.0"},
                {{BuiltinOperator_SVDF, 1}, "1.5.0"},
                {{BuiltinOperator_SVDF, 2}, "1.14.0"},
                {{BuiltinOperator_SVDF, 3}, "2.2.0"},
                {{BuiltinOperator_SVDF, 4}, "2.3.0"},
                {{BuiltinOperator_L2_NORMALIZATION, 1}, "1.5.0"},
                {{BuiltinOperator_L2_NORMALIZATION, 2}, "1.14.0"},
                {{BuiltinOperator_L2_POOL_2D, 1}, "1.5.0"},
                {{BuiltinOperator_LOCAL_RESPONSE_NORMALIZATION, 1}, "1.5.0"},
                {{BuiltinOperator_MAX_POOL_2D, 1}, "1.5.0"},
                {{BuiltinOperator_MAX_POOL_2D, 2}, "1.14.0"},
                {{BuiltinOperator_MAX_POOL_2D, 3}, "2.3.0"},
                {{BuiltinOperator_MAXIMUM, 1}, "1.14.0"},
                {{BuiltinOperator_MAXIMUM, 2}, "1.14.0"},
                {{BuiltinOperator_MAXIMUM, 3}, "2.3.0"},
                {{BuiltinOperator_MAXIMUM, 4}, "2.3.0"},
                {{BuiltinOperator_MINIMUM, 1}, "1.14.0"},
                {{BuiltinOperator_MINIMUM, 2}, "1.14.0"},
                {{BuiltinOperator_MINIMUM, 3}, "2.3.0"},
                {{BuiltinOperator_MINIMUM, 4}, "2.3.0"},
                {{BuiltinOperator_MUL, 1}, "1.5.0"},
                {{BuiltinOperator_MUL, 2}, "1.14.0"},
                {{BuiltinOperator_MUL, 3}, "1.15.0"},
                {{BuiltinOperator_MUL, 4}, "2.3.0"},
                {{BuiltinOperator_NON_MAX_SUPPRESSION_V4, 1}, "2.1.0"},
                {{BuiltinOperator_NON_MAX_SUPPRESSION_V5, 1}, "2.1.0"},
                {{BuiltinOperator_PAD, 1}, "1.5.0"},
                {{BuiltinOperator_PAD, 2}, "1.14.0"},
                {{BuiltinOperator_PAD, 3}, "2.4.0"},
                {{BuiltinOperator_PAD, 4}, "2.6.0"},
                {{BuiltinOperator_TILE, 1}, "1.10.1"},
                {{BuiltinOperator_TILE, 2}, "2.2.0"},
                {{BuiltinOperator_PADV2, 1}, "1.9.0"},
                {{BuiltinOperator_PADV2, 2}, "1.14.0"},
                {{BuiltinOperator_PADV2, 3}, "2.4.0"},
                {{BuiltinOperator_PADV2, 4}, "2.6.0"},
                {{BuiltinOperator_RESHAPE, 1}, "1.5.0"},
                {{BuiltinOperator_SOFTMAX, 1}, "1.5.0"},
                {{BuiltinOperator_SOFTMAX, 2}, "1.14.0"},
                {{BuiltinOperator_SOFTMAX, 3}, "2.3.0"},
                {{BuiltinOperator_SPACE_TO_DEPTH, 1}, "1.5.0"},
                {{BuiltinOperator_SPACE_TO_DEPTH, 2}, "1.14.0"},
                {{BuiltinOperator_TRANSPOSE, 1}, "1.6.0"},
                {{BuiltinOperator_TRANSPOSE, 2}, "1.14.0"},
                {{BuiltinOperator_TRANSPOSE, 3}, "1.15.0"},
                {{BuiltinOperator_TRANSPOSE, 4}, "2.3.0"},
                {{BuiltinOperator_TRANSPOSE, 5}, "2.4.0"},
                {{BuiltinOperator_LSTM, 1}, "1.7.0"},
                {{BuiltinOperator_LSTM, 2}, "1.10.0"},
                {{BuiltinOperator_LSTM, 3}, "1.14.0"},
                {{BuiltinOperator_LSTM, 4}, "2.3.0"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_LSTM, 1}, "1.13.1"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_LSTM, 2}, "1.14.0"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_LSTM, 3}, "2.3.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_LSTM, 1}, "1.14.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_LSTM, 2}, "1.14.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_LSTM, 3}, "1.14.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_RNN, 1}, "1.14.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_RNN, 2}, "1.14.0"},
                {{BuiltinOperator_BIDIRECTIONAL_SEQUENCE_RNN, 3}, "2.3.0"},
                {{BuiltinOperator_MEAN, 1}, "1.6.0"},
                {{BuiltinOperator_MEAN, 2}, "1.14.0"},
                {{BuiltinOperator_MEAN, 3}, "2.4.0"},
                {{BuiltinOperator_SUM, 1}, "1.10.0"},
                {{BuiltinOperator_SUM, 2}, "1.15.0"},
                {{BuiltinOperator_REDUCE_MAX, 1}, "1.11.0"},
                {{BuiltinOperator_REDUCE_MAX, 2}, "1.14.0"},
                {{BuiltinOperator_REDUCE_MAX, 3}, "2.5.0"},
                {{BuiltinOperator_REDUCE_MIN, 1}, "1.11.0"},
                {{BuiltinOperator_REDUCE_MIN, 2}, "1.14.0"},
                {{BuiltinOperator_REDUCE_MIN, 3}, "2.5.0"},
                {{BuiltinOperator_REDUCE_PROD, 1}, "1.11.0"},
                {{BuiltinOperator_REDUCE_ANY, 1}, "1.11.0"},
                {{BuiltinOperator_RELU6, 1}, "1.5.0"},
                {{BuiltinOperator_RELU6, 2}, "1.14.0"},
                {{BuiltinOperator_RELU6, 3}, "2.5.0"},
                {{BuiltinOperator_RESIZE_BILINEAR, 1}, "1.7.0"},
                {{BuiltinOperator_RESIZE_BILINEAR, 2}, "1.14.0"},
                {{BuiltinOperator_RESIZE_BILINEAR, 3}, "2.2.0"},
                {{BuiltinOperator_RESIZE_BILINEAR, 4}, "2.5.0"},
                {{BuiltinOperator_RESIZE_NEAREST_NEIGHBOR, 1}, "1.13.1"},
                {{BuiltinOperator_RESIZE_NEAREST_NEIGHBOR, 2}, "1.14.0"},
                {{BuiltinOperator_RESIZE_NEAREST_NEIGHBOR, 3}, "2.3.0"},
                {{BuiltinOperator_RESIZE_NEAREST_NEIGHBOR, 4}, "2.4.0"},
                {{BuiltinOperator_RNN, 1}, "1.5.0"},
                {{BuiltinOperator_RNN, 2}, "1.14.0"},
                {{BuiltinOperator_RNN, 3}, "2.3.0"},
                {{BuiltinOperator_SKIP_GRAM, 1}, "1.5.0"},
                {{BuiltinOperator_SQUEEZE, 1}, "1.6.0"},
                {{BuiltinOperator_SQUEEZE, 2}, "2.5.0"},
                {{BuiltinOperator_SPLIT, 1}, "1.5.0"},
                {{BuiltinOperator_SPLIT, 2}, "1.14.0"},
                {{BuiltinOperator_SPLIT, 3}, "1.14.0"},
                {{BuiltinOperator_SPLIT, 4}, "2.3.0"},
                {{BuiltinOperator_SPLIT_V, 1}, "1.13.1"},
                {{BuiltinOperator_SPLIT_V, 2}, "2.3.0"},
                {{BuiltinOperator_STRIDED_SLICE, 1}, "1.6.0"},
                {{BuiltinOperator_STRIDED_SLICE, 2}, "1.14.0"},
                {{BuiltinOperator_STRIDED_SLICE, 3}, "2.1.0"},
                {{BuiltinOperator_STRIDED_SLICE, 4}, "2.2.0"},
                {{BuiltinOperator_STRIDED_SLICE, 5}, "2.5.0"},
                {{BuiltinOperator_STRIDED_SLICE, 6}, "2.6.0"},
                {{BuiltinOperator_TOPK_V2, 1}, "1.7.0"},
                {{BuiltinOperator_TOPK_V2, 2}, "1.14.0"},
                {{BuiltinOperator_ARG_MAX, 1}, "1.9.0"},
                {{BuiltinOperator_ARG_MAX, 2}, "1.14.0"},
                {{BuiltinOperator_ARG_MIN, 1}, "1.9.0"},
                {{BuiltinOperator_ARG_MIN, 2}, "1.14.0"},
                {{BuiltinOperator_TRANSPOSE_CONV, 1}, "1.9.0"},
                {{BuiltinOperator_TRANSPOSE_CONV, 2}, "2.2.0"},
                {{BuiltinOperator_TRANSPOSE_CONV, 3}, "2.3.0"},
                {{BuiltinOperator_SPARSE_TO_DENSE, 1}, "1.9.0"},
                {{BuiltinOperator_SPARSE_TO_DENSE, 2}, "1.14.0"},
                {{BuiltinOperator_SPARSE_TO_DENSE, 3}, "1.15.0"},
                {{BuiltinOperator_EXPAND_DIMS, 1}, "1.10.0"},
                {{BuiltinOperator_PACK, 1}, "1.11.0"},
                {{BuiltinOperator_PACK, 2}, "1.14.0"},
                {{BuiltinOperator_PACK, 3}, "2.3.0"},
                {{BuiltinOperator_SHAPE, 1}, "1.10.0"},
                {{BuiltinOperator_SLICE, 1}, "1.14.0"},
                {{BuiltinOperator_SLICE, 2}, "1.14.0"},
                {{BuiltinOperator_SLICE, 3}, "1.14.0"},
                {{BuiltinOperator_SLICE, 4}, "2.4.0"},
                {{BuiltinOperator_SLICE, 5}, "2.5.0"},
                {{BuiltinOperator_TANH, 1}, "1.14.0"},
                {{BuiltinOperator_TANH, 2}, "1.14.0"},
                {{BuiltinOperator_TANH, 3}, "2.3.0"},
                {{BuiltinOperator_ONE_HOT, 1}, "1.11.0"},
                {{BuiltinOperator_UNPACK, 1}, "1.11.0"},
                {{BuiltinOperator_UNPACK, 2}, "1.14.0"},
                {{BuiltinOperator_UNPACK, 3}, "2.2.0"},
                {{BuiltinOperator_UNPACK, 4}, "2.3.0"},
                {{BuiltinOperator_LEAKY_RELU, 1}, "1.13.1"},
                {{BuiltinOperator_LEAKY_RELU, 2}, "2.3.0"},
                {{BuiltinOperator_LOGISTIC, 1}, "1.14.0"},
                {{BuiltinOperator_LOGISTIC, 2}, "1.14.0"},
                {{BuiltinOperator_LOGISTIC, 3}, "2.3.0"},
                {{BuiltinOperator_LOG_SOFTMAX, 1}, "1.14.0"},
                {{BuiltinOperator_LOG_SOFTMAX, 2}, "1.14.0"},
                {{BuiltinOperator_LSH_PROJECTION, 1}, "1.5.0"},
                {{BuiltinOperator_SQUARED_DIFFERENCE, 1}, "1.13.1"},
                {{BuiltinOperator_SQUARED_DIFFERENCE, 2}, "2.5.0"},
                {{BuiltinOperator_MIRROR_PAD, 1}, "1.13.1"},
                {{BuiltinOperator_MIRROR_PAD, 2}, "2.3.0"},
                {{BuiltinOperator_UNIQUE, 1}, "1.14.0"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_RNN, 1}, "1.14.0"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_RNN, 2}, "1.14.0"},
                {{BuiltinOperator_UNIDIRECTIONAL_SEQUENCE_RNN, 3}, "2.3.0"},
                {{BuiltinOperator_WHERE, 1}, "1.14.0"},
                {{BuiltinOperator_DEQUANTIZE, 1}, "1.13.1"},
                {{BuiltinOperator_DEQUANTIZE, 2}, "1.14.0"},
                {{BuiltinOperator_DEQUANTIZE, 3}, "1.15.0"},
                {{BuiltinOperator_DEQUANTIZE, 4}, "2.2.0"},
                {{BuiltinOperator_REVERSE_SEQUENCE, 1}, "1.14.0"},
                {{BuiltinOperator_EQUAL, 1}, "1.14.0"},
                {{BuiltinOperator_EQUAL, 2}, "1.14.0"},
                {{BuiltinOperator_EQUAL, 3}, "2.3.0"},
                {{BuiltinOperator_NOT_EQUAL, 1}, "1.14.0"},
                {{BuiltinOperator_NOT_EQUAL, 2}, "1.14.0"},
                {{BuiltinOperator_NOT_EQUAL, 3}, "2.3.0"},
                {{BuiltinOperator_GREATER, 1}, "1.14.0"},
                {{BuiltinOperator_GREATER, 2}, "1.14.0"},
                {{BuiltinOperator_GREATER_EQUAL, 1}, "1.14.0"},
                {{BuiltinOperator_GREATER_EQUAL, 2}, "1.14.0"},
                {{BuiltinOperator_LESS, 1}, "1.14.0"},
                {{BuiltinOperator_LESS, 2}, "1.14.0"},
                {{BuiltinOperator_LESS_EQUAL, 1}, "1.14.0"},
                {{BuiltinOperator_LESS_EQUAL, 2}, "1.14.0"},
                {{BuiltinOperator_SCATTER_ND, 1}, "2.1.0"},
                {{BuiltinOperator_SEGMENT_SUM, 1}, "2.2.0"},
                {{BuiltinOperator_SELECT, 1}, "1.14.0"},
                {{BuiltinOperator_SELECT, 2}, "1.14.0"},
                {{BuiltinOperator_SELECT_V2, 1}, "2.2.0"},
                {{BuiltinOperator_IF, 1}, "1.15.0"},
                {{BuiltinOperator_FLOOR_DIV, 1}, "1.14.0"},
                {{BuiltinOperator_FLOOR_DIV, 2}, "1.14.0"},
                {{BuiltinOperator_FLOOR, 1}, "1.9.0"},
                {{BuiltinOperator_CEIL, 1}, "1.14.0"},
                {{BuiltinOperator_MATRIX_DIAG, 1}, "1.14.0"},
                {{BuiltinOperator_MATRIX_SET_DIAG, 1}, "1.14.0"},
                {{BuiltinOperator_ELU, 1}, "1.14.0"},
                {{BuiltinOperator_QUANTIZE, 1}, "1.14.0"},
                {{BuiltinOperator_QUANTIZE, 2}, "1.15.0"},
                {{BuiltinOperator_ROUND, 1}, "1.14.0"},
                {{BuiltinOperator_RELU, 1}, "1.5.0"},
                {{BuiltinOperator_RELU, 2}, "2.1.0"},
                {{BuiltinOperator_RELU, 3}, "2.5.0"},
                {{BuiltinOperator_RELU_N1_TO_1, 1}, "1.5.0"},
                {{BuiltinOperator_PRELU, 1}, "1.8.0"},
                {{BuiltinOperator_EXP, 1}, "1.7.0"},
                {{BuiltinOperator_COS, 1}, "1.14.0"},
                {{BuiltinOperator_NEG, 1}, "1.9.0"},
                {{BuiltinOperator_POW, 1}, "1.10.0"},
                {{BuiltinOperator_LOGICAL_OR, 1}, "1.11.0"},
                {{BuiltinOperator_LOGICAL_AND, 1}, "1.11.0"},
                {{BuiltinOperator_LOGICAL_NOT, 1}, "1.11.0"},
                {{BuiltinOperator_FLOOR_MOD, 1}, "1.13.0"},
                {{BuiltinOperator_RANGE, 1}, "1.13.0"},
                {{BuiltinOperator_SIN, 1}, "1.9.0"},
                {{BuiltinOperator_LOG, 1}, "1.14.0"},
                {{BuiltinOperator_SQRT, 1}, "1.10.0"},
                {{BuiltinOperator_RSQRT, 1}, "1.10.0"},
                {{BuiltinOperator_RSQRT, 2}, "2.5.0"},
                {{BuiltinOperator_SQUARE, 1}, "1.12.0"},
                {{BuiltinOperator_ZEROS_LIKE, 1}, "1.12.0"},
                {{BuiltinOperator_ABS, 1}, "1.13.0"},
                {{BuiltinOperator_ABS, 2}, "2.4.0"},
                {{BuiltinOperator_ABS, 3}, "2.5.0"},
                {{BuiltinOperator_ABS, 4}, "2.6.0"},
                {{BuiltinOperator_HARD_SWISH, 1}, "1.15.0"},
                {{BuiltinOperator_FILL, 1}, "1.13.0"},
                {{BuiltinOperator_FILL, 2}, "2.3.0"},
                {{BuiltinOperator_FILL, 3}, "2.5.0"},
                {{BuiltinOperator_REVERSE_V2, 1}, "1.14.0"},
                {{BuiltinOperator_REVERSE_V2, 2}, "2.2.0"},
                {{BuiltinOperator_REVERSE_V2, 3}, "2.5.0"},
                {{BuiltinOperator_RANK, 1}, "1.14.0"},
                {{BuiltinOperator_WHILE, 1}, "1.15.0"},
                {{BuiltinOperator_CUMSUM, 1}, "2.4.0"},
                {{BuiltinOperator_CALL_ONCE, 1}, "2.5.0"},
                {{BuiltinOperator_RFFT2D, 1}, "2.5.0"},
                {{BuiltinOperator_CONV_3D, 1}, "2.5.0"},
                {{BuiltinOperator_IMAG, 1}, "2.5.0"},
                {{BuiltinOperator_REAL, 1}, "2.5.0"},
                {{BuiltinOperator_COMPLEX_ABS, 1}, "2.5.0"},
                {{BuiltinOperator_HASHTABLE, 1}, "2.5.0"},
                {{BuiltinOperator_HASHTABLE_FIND, 1}, "2.5.0"},
                {{BuiltinOperator_HASHTABLE_IMPORT, 1}, "2.5.0"},
                {{BuiltinOperator_HASHTABLE_SIZE, 1}, "2.5.0"},
                {{BuiltinOperator_REDUCE_ALL, 1}, "2.6.0"},
            });
  
    std::pair<BuiltinOperator, int> version_key = {op_code, op_version};
    auto it = op_version_map->find(version_key);
    if (it == op_version_map->end()) {
      return std::string();
    }
    return it->second;
  }
  
  void UpdateMinimumRuntimeVersionForModel(uint8_t* model_buffer_pointer) {
    auto model = GetMutableModel(model_buffer_pointer);
    std::string model_min_version;
    auto subgraphs = model->subgraphs();
    for (int i = 0; i < subgraphs->Length(); ++i) {
      const SubGraph* subgraph = subgraphs->Get(i);
      for (int j = 0; j < subgraph->operators()->Length(); ++j) {
        const Operator* op = subgraph->operators()->Get(j);
        const OperatorCode* op_code =
            model->operator_codes()->Get(op->opcode_index());
        std::string runtime_version = FindMinimumRuntimeVersionForOp(
            GetBuiltinCode(op_code), op_code->version());
        // If we didn't find the current op version in the map, skip comparison.
        if (runtime_version.empty()) {
          continue;
        }
        if (CompareRuntimeVersion(model_min_version, runtime_version)) {
          // Current min model runtime version should be bumped if we see a higher
          // op version.
          model_min_version = runtime_version;
        }
      }
    }
    // The size of the `min_runtime_version` metadata buffer is 16 bytes. If the
    // generated `model_min_version` is equal or longer than 16 bytes, print a
    // warning message and return.
    if (model_min_version.size() >= 16) {
      TFLITE_LOG(TFLITE_LOG_WARNING,
                 "Skip writing minimum runtime version string since it's "
                 "longer than 16 bytes.");
      return;
    }
    // Copy over the bytes from `model_min_version` into the buffer.
    for (int i = 0; i < model->metadata()->size(); ++i) {
      if (model->metadata()->Get(i)->name()->str() == "min_runtime_version") {
        auto buffer = model->metadata()->Get(i)->buffer();
        auto buffer_data =
            model->mutable_buffers()->GetMutableObject(buffer)->mutable_data();
        memset(buffer_data->data(), 0, buffer_data->size());
        memcpy(buffer_data->data(), model_min_version.data(),
               model_min_version.size());
        break;
      }
    }
  }
  
  }  // namespace tflite
  