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   char *buffer_ptr;
  16
  17   memset(buffer, 0, buffer_length);
  18   send_length= 0;
  19
  20   buffer_ptr= buffer;
  21   while (1)
  22   {
  23     unsigned int read_length;
  24     read_length= read(ptr->hosts[server_key].fd, buffer_ptr, 1);
  25
  26     if (read_length != 1)
  27       return  MEMCACHED_UNKNOWN_READ_FAILURE;
  28
  29     if (*buffer_ptr == '\n')
  30       break;
  31     else
  32       buffer_ptr++;
  33   }
  34
  35   switch(buffer[0])
  36   {
  37   case 'V': /* VALUE */
  38     return MEMCACHED_SUCCESS;
  39   case 'O': /* OK */
  40     return MEMCACHED_SUCCESS;
  41   case 'S': /* STORED STATS SERVER_ERROR */
  42     {
  43       if (buffer[1] == 'T') /* STORED STATS */
  44         return MEMCACHED_SUCCESS;
  45       else if (buffer[1] == 'E')
  46         return MEMCACHED_SERVER_ERROR;
  47       else
  48         return MEMCACHED_UNKNOWN_READ_FAILURE;
  49     }
  50   case 'D': /* DELETED */
  51     return MEMCACHED_SUCCESS;
  52   case 'N': /* NOT_FOUND */
  53     {
  54       if (buffer[4] == 'F')
  55         return MEMCACHED_NOTFOUND;
  56       else if (buffer[4] == 'S')
  57         return MEMCACHED_NOTSTORED;
  58       else
  59         return MEMCACHED_UNKNOWN_READ_FAILURE;
  60     }
  61   case 'E': /* PROTOCOL ERROR or END */
  62     {
  63       if (buffer[1] == 'N')
  64         return MEMCACHED_NOTFOUND;
  65       else if (buffer[1] == 'R')
  66         return MEMCACHED_PROTOCOL_ERROR;
  67       else
  68         return MEMCACHED_UNKNOWN_READ_FAILURE;
  69     }
  70   case 'C': /* CLIENT ERROR */
  71     return MEMCACHED_CLIENT_ERROR;
  72   default:
  73     return MEMCACHED_UNKNOWN_READ_FAILURE;
  74
  75     return MEMCACHED_READ_FAILURE;
  76   }
  77
  78   return MEMCACHED_SUCCESS;
  79 }