#include <stdio.h>
#include <stdlib.h>

char *load_input() {
  FILE *fp = fopen("input.txt", "r");
  fseek(fp, 0L, SEEK_END);
  int sz = ftell(fp);
  rewind(fp);
  char *data_buffer = malloc((sz + 1) * sizeof(char));
  fread(data_buffer, sz, 1, fp);
  data_buffer[sz] = 0;
  fclose(fp);
  return data_buffer;
}

InputWithSize *load_input_with_size() {
  FILE *fp = fopen("input.txt", "r");
  fseek(fp, 0L, SEEK_END);
  int sz = ftell(fp);
  rewind(fp);
  char *data_buffer = malloc((sz + 1) * sizeof(char));
  fread(data_buffer, sz, 1, fp);
  data_buffer[sz] = 0;
  fclose(fp);

  InputWithSize *input_with_size = malloc(sizeof(InputWithSize));
  input_with_size->size = sz + 1;
  input_with_size->data_buffer = data_buffer;

  return input_with_size;
}

void free_input_with_size(InputWithSize *input_with_size) {
  free(input_with_size -> data_buffer);
  free(input_with_size);
}

void print_binary(int q) {
  char c[33] = {0};
  for (int i = 0; i < 32; i++) {
    c[i] = q & (1<<i) ? '1' : '0';
  }
  puts(c);
}

// http://www.cse.yorku.ca/~oz/hash.html
// djb2 hash
unsigned long hash_string(unsigned char *str) {
  unsigned long hash = 5381;
  int c;

  while (c = *str++)
    hash = ((hash << 5) + hash) + c; /* hash * 33 + c */

  return hash;
}