#include <string.h>

#include "string_key.h"

size_t string_hash(const void *key)
{
  const char *s = key;
  size_t sum = 0;
  size_t factor = 29;
  while (s != NULL && *s != '\0')
  {
    sum += *s * factor;
    s++;
    factor *= 29;
  }

  return sum;
}

void *string_copy(const void *key)
{
  char *s = malloc(strlen(key) + 1);
  if (s != NULL)
  {
    strcpy(s, key);
  }
  return s;
}

int string_compare(const void *key1, const void *key2)
{
  return strcmp(key1, key2);
}

int string_ptr_compare(const void *key1, const void*key2)
{
  return strcmp(*(char **)key1, *(char **)key2);
}