git.m6w6.name Git - m6w6/libmemcached/blob - lib/memcached_response.c

   1 /*
   2   Memcached library
   3
   4   memcached_response() is used to determine the return result
   5   from an issued command.
   6 */
   7
   8 #include <memcached.h>
   9
  10 memcached_return memcached_response(memcached_st *ptr,
  11                                     char *buffer, size_t buffer_length,
  12                                     unsigned int server_key)
  13 {
  14   size_t send_length;
  15
  16   memset(buffer, 0, buffer_length);
  17   send_length= read(ptr->hosts[server_key].fd, buffer, buffer_length);
  18
  19   if (send_length)
  20     switch(buffer[0])
  21     {
  22     case 'V': /* VALUE */
  23       return MEMCACHED_SUCCESS;
  24     case 'O': /* OK */
  25       return MEMCACHED_SUCCESS;
  26     case 'S': /* STORED STATS SERVER_ERROR */
  27       {
  28         if (buffer[1] == 'T') /* STORED STATS */
  29           return MEMCACHED_SUCCESS;
  30         else if (buffer[1] == 'E')
  31           return MEMCACHED_SERVER_ERROR;
  32         else
  33           return MEMCACHED_UNKNOWN_READ_FAILURE;
  34       }
  35     case 'D': /* DELETED */
  36       return MEMCACHED_SUCCESS;
  37     case 'N': /* NOT_FOUND */
  38       {
  39         if (buffer[4] == 'F')
  40           return MEMCACHED_NOTFOUND;
  41         else if (buffer[4] == 'S')
  42           return MEMCACHED_NOTSTORED;
  43         else
  44           return MEMCACHED_UNKNOWN_READ_FAILURE;
  45       }
  46     case 'E': /* PROTOCOL ERROR or END */
  47       {
  48         if (buffer[1] == 'N')
  49           return MEMCACHED_NOTFOUND;
  50         else if (buffer[1] == 'R')
  51           return MEMCACHED_PROTOCOL_ERROR;
  52         else
  53           return MEMCACHED_UNKNOWN_READ_FAILURE;
  54       }
  55     case 'C': /* CLIENT ERROR */
  56       return MEMCACHED_CLIENT_ERROR;
  57     default:
  58       return MEMCACHED_UNKNOWN_READ_FAILURE;
  59     }
  60
  61   return MEMCACHED_READ_FAILURE;
  62 }