git.m6w6.name Git - awesomized/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
  19   buffer_ptr= buffer;
  20   while (1)
  21   {
  22     unsigned int read_length;
  23     read_length= read(ptr->hosts[server_key].fd, buffer_ptr, 1);
  24
  25     if (read_length != 1)
  26       return  MEMCACHED_UNKNOWN_READ_FAILURE;
  27
  28     if (*buffer_ptr == '\n')
  29       break;
  30     else
  31       buffer_ptr++;
  32   }
  33
  34   if (send_length)
  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
  76   return MEMCACHED_READ_FAILURE;
  77 }