git.m6w6.name Git - awesomized/libmemcached/blob - lib/memcached_delete.c

   1 #include <memcached.h>
   2
   3 memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_length,
   4                                   time_t expiration)
   5 {
   6   size_t send_length, sent_length;
   7   memcached_return rc;
   8   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
   9   unsigned int server_key;
  10
  11   rc= memcached_connect(ptr);
  12
  13   if (rc != MEMCACHED_SUCCESS)
  14     return rc;
  15
  16   server_key= memcached_generate_hash(key, key_length) % ptr->number_of_hosts;
  17
  18   if (expiration)
  19     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  20                           "delete %.*s %llu\r\n", (int)key_length, key,
  21                           (unsigned long long)expiration);
  22   else
  23     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  24                           "delete %.*s\r\n", (int)key_length, key);
  25
  26   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
  27     return MEMCACHED_WRITE_FAILURE;
  28
  29   sent_length= write(ptr->hosts[server_key].fd, buffer, send_length);
  30
  31   if (sent_length == -1)
  32   {
  33     fprintf(stderr, "error %s: write: %m\n", __FUNCTION__);
  34     return MEMCACHED_WRITE_FAILURE;
  35   }
  36
  37   if (sent_length != send_length)
  38   {
  39     fprintf(stderr, "error %s: short write %d %d: %m\n",
  40             __FUNCTION__, sent_length, send_length);
  41     return MEMCACHED_WRITE_FAILURE;
  42   }
  43
  44   return memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, server_key);
  45 }