An example of how to use uthash for generalized pointer storage with a string key.

ptrmap.c

typedef struct {
  uint32_t intkey;
  char strkey[64];
  void * data;

  UT_hash_handle hh;
} ptrmap_t;

#define str_ptrmap_insert(map,key,insval) \
  do {                                  \
    ptrmap_t *elem;                     \
    HASH_FIND_STR(map,key,elem);        \
    if (!elem) {                        \
      elem = (ptrmap_t *) malloc(sizeof(ptrmap_t));  \
      memcpy(elem->strkey,key,strnlen(key,63)); \
      elem->strkey[strnlen(key,63)] = '\0'; \
      elem->data = insval;                \
      HASH_ADD_STR( map, strkey, elem); \
    }                                   \
  } while (0)