text: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 "util.h"
  
  #include <limits.h>
  #include <errno.h>
  #include <strings.h>
  #include <string.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  /*
   * if all chars in the input str are numbers
   * return true/false
   */
  static int all_numbers(char* input) {
    for (; input[0] != 0; input++) {
      if (input[0] < '0' || input[0] > '9') {
        return 0;
      }
    }
    return 1;
  }
  
  int get_numbers_split_by_comma(const char* input, int** numbers,
                                 size_t* ret_n_numbers) {
    size_t allocation_size = 1;
    int i = 0;
    while (input[i] != 0) {
      if (input[i] == ',') {
        allocation_size++;
      }
      i++;
    }
  
    (*numbers) = malloc(sizeof(int) * allocation_size);
    if (!(*numbers)) {
      fprintf(ERRORFILE, "Failed to allocating memory for *numbers: %s\n",
              __func__);
      exit(OUT_OF_MEMORY);
    }
    memset(*numbers, 0, sizeof(int) * allocation_size);
  
    char* input_cpy = strdup(input);
    if (!input_cpy) {
      fprintf(ERRORFILE, "Failed to allocating memory for input_cpy: %s\n",
              __func__);
      exit(OUT_OF_MEMORY);
    }
  
    char* p = strtok(input_cpy, ",");
    int idx = 0;
    size_t n_numbers = 0;
    while (p != NULL) {
      char *temp;
      long n = strtol(p, &temp, 0);
      // According to answer:
      // https://stackoverflow.com/questions/14176123/correct-usage-of-strtol
      // We need to properly check errno and overflows
      if (temp == p || *temp != '\0' ||
          ((n == LONG_MIN || n == LONG_MAX) && errno == ERANGE)) {
        fprintf(stderr,
                "Could not convert '%s' to long and leftover string is: '%s'\n",
                p, temp);
        free(input_cpy);
        return -1;
      }
  
      n_numbers++;
      (*numbers)[idx] = n;
      p = strtok(NULL, ",");
      idx++;
    }
  
    free(input_cpy);
    *ret_n_numbers = n_numbers;
  
    return 0;
  }
  
  int validate_container_id(const char* input) {
    int is_container_id = 1;
  
    /*
     * Two different forms of container_id
     * container_e17_1410901177871_0001_01_000005
     * container_1410901177871_0001_01_000005
     */
    if (!input) {
      return 0;
    }
  
    char* input_cpy = strdup(input);
    if (!input_cpy) {
      return 0;
    }
  
    char* p = strtok(input_cpy, "_");
    int idx = 0;
    while (p != NULL) {
      if (0 == idx) {
        if (0 != strcmp("container", p)) {
          is_container_id = 0;
          goto cleanup;
        }
      } else if (1 == idx) {
        // this could be e[n][n], or [n][n]...
        if (!all_numbers(p)) {
          if (p[0] == 0) {
            is_container_id = 0;
            goto cleanup;
          }
          if (p[0] != 'e') {
            is_container_id = 0;
            goto cleanup;
          }
          if (!all_numbers(p + 1)) {
            is_container_id = 0;
            goto cleanup;
          }
        }
      } else {
        // otherwise, should be all numbers
        if (!all_numbers(p)) {
          is_container_id = 0;
          goto cleanup;
        }
      }
  
      p = strtok(NULL, "_");
      idx++;
    }
  
  cleanup:
    if (input_cpy) {
      free(input_cpy);
    }
  
    // We should have [5,6] elements split by '_'
    if (idx > 6 || idx < 5) {
      is_container_id = 0;
    }
    return is_container_id;
  }
  