Using sds with clib/list

example.c

//A little function to allocate a length-1 sds from a char
//This is a little nasty, since we would need a lot of tiny mallocs if we do this often
sds sdsnewchar(char c) {
  //Do some dirty allocations to save the char
  char *ch = (char*)malloc(2*sizeof(char)); //culprit of small size allocation - could pre-allocate if we do this often
  ch[0] = c;
  ch[1] = '\0'; //zero-termination
  sds str = sdsnew(ch); //new sds item, copied
  free(ch); //sdsnew copies the content, so we can free
  return str;
}

//This is a tiny example of how to properly use a list of sds elements
int main() {
  //use the nasty little function
  sds word = sdsnewchar('c');
  //sds can be printf-ed as a string!
  printf("%s\n", word);
  
  //new clib/list
  list_t *tokens = list_new();
  //tell the list to deallocate elements with sdsfree - super handy
  void (*sds_dealloc)() = &sdsfree;
  tokens->free=sds_dealloc;
  
  //push a few
  list_rpush(tokens,list_node_new(word));
  list_rpush(tokens,list_node_new(sdsnew("woooot!")));

  //running iteration pointer
  list_node_t *n;
  //new iterator
  list_iterator_t *iter = list_iterator_new(tokens,LIST_HEAD);
  
  //double brackets to evaluate the result, not the assignment
  while ((n = list_iterator_next(iter))) {
    printf("%s\n", (sds)n->val); //note the sds cast
  }
  //cleam
  list_iterator_destroy(iter);
  //clean
  list_destroy(tokens);
  return 0;
}