c('PL_add_hash

Availability:C-language interface function

void* PL_add_hash_table(hash_table_t table, void *key, void *value, int flags)

Add key-value to the table. The behaviour if key is already in the table depends on flags. If 0, this function returns the existing value without updating the table. If PL_HT_UPDATE the old value is replaced and the function returns the old value. If PL_HT_NEW, a message and backtrace are printed and the function returns NULL if key is already in the table.